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Posted to commits@nuttx.apache.org by xi...@apache.org on 2022/11/23 11:52:42 UTC
[incubator-nuttx] 01/03: boards/xtensa/esp32: add initial commit for the ESP32-SPARROW-KIT
This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
commit 3351146c0bf12ac59fc12d957b07116d5504a411
Author: Robert-Ionut Alexa <ro...@gmail.com>
AuthorDate: Mon Nov 21 17:05:17 2022 +0200
boards/xtensa/esp32: add initial commit for the ESP32-SPARROW-KIT
ESP32-SPARROW-KIT is built upon ESP32-WROVER-KIT by adding various
peripherals. This is an initial commits that only backports the code
as it is, without further changes.
Signed-off-by: Robert-Ionut Alexa <ro...@gmail.com>
---
boards/Kconfig | 21 ++
boards/xtensa/esp32/esp32-sparrow-kit/Kconfig | 8 +
.../esp32/esp32-sparrow-kit/configs/nsh/defconfig | 45 +++
.../xtensa/esp32/esp32-sparrow-kit/include/board.h | 107 ++++++
.../esp32-sparrow-kit/include/board_memorymap.h | 128 +++++++
.../esp32/esp32-sparrow-kit/scripts/.gitignore | 1 +
.../esp32/esp32-sparrow-kit/scripts/Make.defs | 92 +++++
.../xtensa/esp32/esp32-sparrow-kit/src/Make.defs | 66 ++++
.../esp32-sparrow-kit/src/esp32-sparrow-kit.h | 118 ++++++
.../esp32/esp32-sparrow-kit/src/esp32_appinit.c | 80 +++++
.../esp32/esp32-sparrow-kit/src/esp32_autoleds.c | 185 ++++++++++
.../esp32/esp32-sparrow-kit/src/esp32_boot.c | 101 ++++++
.../esp32/esp32-sparrow-kit/src/esp32_bringup.c | 395 +++++++++++++++++++++
.../esp32/esp32-sparrow-kit/src/esp32_buttons.c | 166 +++++++++
.../esp32/esp32-sparrow-kit/src/esp32_gpio.c | 391 ++++++++++++++++++++
.../esp32/esp32-sparrow-kit/src/esp32_mmcsd.c | 84 +++++
.../esp32/esp32-sparrow-kit/src/esp32_reset.c | 63 ++++
.../esp32/esp32-sparrow-kit/src/esp32_userleds.c | 94 +++++
18 files changed, 2145 insertions(+)
diff --git a/boards/Kconfig b/boards/Kconfig
index a8c7dd9555..02e5a5a92d 100644
--- a/boards/Kconfig
+++ b/boards/Kconfig
@@ -253,6 +253,23 @@ config ARCH_BOARD_ESP32_LYRAT
Development Framework (ADF). It is designed for smart speakers and smart-home
applications. This port is for board version 4.3.
+config ARCH_BOARD_ESP32_SPARROWKIT
+ bool "Espressif ESP-SPARROW-KIT"
+ depends on ARCH_CHIP_ESP32WROVER
+ select ARCH_HAVE_LEDS
+ select ARCH_HAVE_BUTTONS
+ select ARCH_HAVE_IRQBUTTONS if ESP32_GPIO_IRQ
+ ---help---
+ ESP32-SPARROW-KIT is a custom-made board based on Espressif's ESP32WROVER chip
+ and built upon the ESP32-WROVERKIT board. It is designed for a university
+ course and its purpose is to allow the user to enable support by default for
+ various peripherals which have been soldered into the board:
+ LTR308 ambient light sensor
+ BME680 sensor
+ MicroSD card slot
+ SSD1306 OLED display
+ I2S microphone
+
config ARCH_BOARD_ESP32_WROVERKIT
bool "Espressif ESP-WROVER-KIT"
depends on ARCH_CHIP_ESP32WROVER
@@ -2669,6 +2686,7 @@ config ARCH_BOARD
default "ttgo_eink5_v2" if ARCH_BOARD_TTGO_T5V2_ESP32
default "esp32-ethernet-kit" if ARCH_BOARD_ESP32_ETHERNETKIT
default "esp32-lyrat" if ARCH_BOARD_ESP32_LYRAT
+ default "esp32-sparrow-kit" if ARCH_BOARD_ESP32_SPARROWKIT
default "esp32-wrover-kit" if ARCH_BOARD_ESP32_WROVERKIT
default "esp32c3-devkit" if ARCH_BOARD_ESP32C3_DEVKIT
default "esp32c3-devkit-rust-1" if ARCH_BOARD_ESP32C3_DEVKIT_RUST1
@@ -3672,6 +3690,9 @@ endif
if ARCH_BOARD_ESP32_LYRAT
source "boards/xtensa/esp32/esp32-lyrat/Kconfig"
endif
+if ARCH_BOARD_ESP32_SPARROWKIT
+source "boards/xtensa/esp32/esp32-sparrow-kit/Kconfig"
+endif
if ARCH_BOARD_ESP32_WROVERKIT
source "boards/xtensa/esp32/esp32-wrover-kit/Kconfig"
endif
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/Kconfig b/boards/xtensa/esp32/esp32-sparrow-kit/Kconfig
new file mode 100644
index 0000000000..4027c14aed
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/Kconfig
@@ -0,0 +1,8 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_ESP32_SPARROWKIT
+
+endif # ARCH_BOARD_ESP32_SPARROWKIT
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/configs/nsh/defconfig b/boards/xtensa/esp32/esp32-sparrow-kit/configs/nsh/defconfig
new file mode 100644
index 0000000000..337a63c046
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/configs/nsh/defconfig
@@ -0,0 +1,45 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_ARCH_LEDS is not set
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+# CONFIG_NSH_CMDPARMS is not set
+CONFIG_ARCH="xtensa"
+CONFIG_ARCH_BOARD="esp32-sparrow-kit"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_ESP32_SPARROWKIT=y
+CONFIG_ARCH_CHIP="esp32"
+CONFIG_ARCH_CHIP_ESP32=y
+CONFIG_ARCH_CHIP_ESP32WROVER=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARCH_XTENSA=y
+CONFIG_BOARD_LOOPSPERMSEC=16717
+CONFIG_BUILTIN=y
+CONFIG_ESP32_UART0=y
+CONFIG_FS_PROCFS=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_IDLETHREAD_STACKSIZE=3072
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_MM_REGIONS=3
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=114688
+CONFIG_RAM_START=0x20000000
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=6
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2011
+CONFIG_SYSTEM_NSH=y
+CONFIG_UART0_SERIAL_CONSOLE=y
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/include/board.h b/boards/xtensa/esp32/esp32-sparrow-kit/include/board.h
new file mode 100644
index 0000000000..13f16006b1
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/include/board.h
@@ -0,0 +1,107 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/include/board.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_H
+#define __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Clocking *****************************************************************/
+
+/* The ESP32 Wrover kit board uses a 40MHz crystal oscillator. */
+
+#define BOARD_XTAL_FREQUENCY 40000000
+
+#ifdef CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ
+# define BOARD_CLOCK_FREQUENCY (CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ * 1000000)
+#else
+# define BOARD_CLOCK_FREQUENCY 80000000
+#endif
+
+/* GPIO definitions *********************************************************/
+
+/* Display */
+
+#define DISPLAY_SPI 2
+#define DISPLAY_DC 21
+#define DISPLAY_RST 18
+#define DISPLAY_BCKL 5
+
+/* LED definitions **********************************************************/
+
+/* Define how many LEDs this board has (needed by userleds) */
+
+#define BOARD_LED1 0
+#define BOARD_LED2 1
+#define BOARD_LED3 2
+#define BOARD_NLEDS 3
+
+#define BOARD_LED_RED BOARD_LED1
+#define BOARD_LED_GREEN BOARD_LED2
+#define BOARD_LED_BLUE BOARD_LED3
+
+/* LED bits for use with autoleds */
+
+#define BOARD_LED1_BIT (1 << BOARD_LED1)
+#define BOARD_LED2_BIT (1 << BOARD_LED2)
+#define BOARD_LED3_BIT (1 << BOARD_LED3)
+
+/* If CONFIG_ARCH_LEDs is defined, then NuttX will control the 3 LEDs on
+ * board the ESP-SPARROW-KIT. The following definitions describe how
+ * NuttX controls the LEDs:
+ */
+
+/* These values index an array that contains the bit definitions for the
+ * correct LEDs (see esp32_autoleds.c).
+ */
+
+#define LED_STARTED 0 /* LED2 */
+#define LED_HEAPALLOCATE 1 /* LED3 */
+#define LED_IRQSENABLED 2 /* LED3 + LED2 */
+#define LED_STACKCREATED 3 /* LED3 */
+#define LED_INIRQ 4 /* LED1 + LED3 */
+#define LED_SIGNAL 5 /* LED2 + LED3 */
+#define LED_ASSERTION 6 /* LED1 + LED2 + LED3 */
+#define LED_PANIC 7 /* LED1 + N/C + N/C */
+
+/* The values below are used only to distinguish between the CPUs.
+ * The LEDs are actually mapped as:
+ * CPU0 -> GPIO_LED1 (Red LED)
+ * CPU1 -> GPIO_LED2 (Green LED)
+ * Note that from the previous list only LED_HEAPALLOCATE will still be
+ * valid. This is to avoid collisions and to keep a way to show a successful
+ * heap allocation. The LED used is still LED3 (Blue LED).
+ */
+
+#ifdef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+# define LED_CPU0 8
+# define LED_CPU1 9
+# define LED_CPU (LED_CPU0 + up_cpu_index())
+#endif
+
+/* GPIO pins used by the GPIO Subsystem */
+
+#define BOARD_NGPIOIN 1 /* Amount of GPIO Input pins */
+#define BOARD_NGPIOOUT 1 /* Amount of GPIO Output pins */
+#define BOARD_NGPIOINT 1 /* Amount of GPIO Input w/ Interruption pins */
+
+#endif /* __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_H */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/include/board_memorymap.h b/boards/xtensa/esp32/esp32-sparrow-kit/include/board_memorymap.h
new file mode 100644
index 0000000000..8b6018704a
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/include/board_memorymap.h
@@ -0,0 +1,128 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/include/board_memorymap.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_MEMORYMAP_H
+#define __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_MEMORYMAP_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Kernel ROM */
+
+#define KIROM_START (uintptr_t)__kirom_start
+#define KIROM_SIZE (uintptr_t)__kirom_size
+#define KDROM_START (uintptr_t)__kdrom_start
+#define KDROM_SIZE (uintptr_t)__kdrom_size
+
+/* Kernel RAM */
+
+#define KIRAM_0_START (uintptr_t)__kiram_0_start
+#define KIRAM_0_SIZE (uintptr_t)__kiram_0_size
+#define KIRAM_0_END (uintptr_t)__kiram_0_end
+#define KIRAM_1_START (uintptr_t)__kiram_1_start
+#define KIRAM_1_SIZE (uintptr_t)__kiram_1_size
+#define KIRAM_1_END (uintptr_t)__kiram_1_end
+#define KDRAM_0_START (uintptr_t)__kdram_0_start
+#define KDRAM_0_SIZE (uintptr_t)__kdram_0_size
+#define KDRAM_0_END (uintptr_t)__kdram_0_end
+#define KDRAM_1_START (uintptr_t)__kdram_1_start
+#define KDRAM_1_SIZE (uintptr_t)__kdram_1_size
+#define KDRAM_1_END (uintptr_t)__kdram_1_end
+
+/* Exception vectors */
+
+#define VECTORS_START (uintptr_t)__vectors_start
+#define VECTORS_END (uintptr_t)__vectors_end
+
+/* User ROM */
+
+#define UIROM_START (uintptr_t)__uirom_start
+#define UIROM_SIZE (uintptr_t)__uirom_size
+#define UIROM_END (uintptr_t)__uirom_end
+#define UDROM_START (uintptr_t)__udrom_start
+#define UDROM_SIZE (uintptr_t)__udrom_size
+#define UDROM_END (uintptr_t)__udrom_end
+
+/* User RAM */
+
+#define UIRAM_START (uintptr_t)__uiram_start
+#define UIRAM_SIZE (uintptr_t)__uiram_size
+#define UIRAM_END (uintptr_t)__uiram_end
+#define UDRAM_START (uintptr_t)__udram_start
+#define UDRAM_SIZE (uintptr_t)__udram_size
+#define UDRAM_END (uintptr_t)__udram_end
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Kernel ROM (RX) */
+
+extern uint8_t __kirom_start[];
+extern uint8_t __kirom_size[];
+extern uint8_t __kdrom_start[];
+extern uint8_t __kdrom_size[];
+
+/* Kernel RAM (RW) */
+
+extern uint8_t __kiram_0_start[];
+extern uint8_t __kiram_0_size[];
+extern uint8_t __kiram_0_end[];
+extern uint8_t __kiram_1_start[];
+extern uint8_t __kiram_1_size[];
+extern uint8_t __kiram_1_end[];
+extern uint8_t __kdram_0_start[];
+extern uint8_t __kdram_0_size[];
+extern uint8_t __kdram_0_end[];
+extern uint8_t __kdram_1_start[];
+extern uint8_t __kdram_1_size[];
+extern uint8_t __kdram_1_end[];
+
+/* Exception vectors */
+
+extern uint8_t __vectors_start[];
+extern uint8_t __vectors_end[];
+
+/* User ROM (RX) */
+
+extern uint8_t __uirom_start[];
+extern uint8_t __uirom_size[];
+extern uint8_t __uirom_end[];
+extern uint8_t __udrom_start[];
+extern uint8_t __udrom_size[];
+extern uint8_t __udrom_end[];
+
+/* User RAM (RW) */
+
+extern uint8_t __uiram_start[];
+extern uint8_t __uiram_size[];
+extern uint8_t __uiram_end[];
+extern uint8_t __udram_start[];
+extern uint8_t __udram_size[];
+extern uint8_t __udram_end[];
+
+#endif /* __BOARDS_XTENSA_ESP32_ESP32_SPARROW_KIT_INCLUDE_BOARD_MEMORYMAP_H */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/scripts/.gitignore b/boards/xtensa/esp32/esp32-sparrow-kit/scripts/.gitignore
new file mode 100644
index 0000000000..461270524b
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/scripts/.gitignore
@@ -0,0 +1 @@
+/esp32_out.ld
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/scripts/Make.defs b/boards/xtensa/esp32/esp32-sparrow-kit/scripts/Make.defs
new file mode 100644
index 0000000000..0658e7e273
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/scripts/Make.defs
@@ -0,0 +1,92 @@
+############################################################################
+# boards/xtensa/esp32/esp32-sparrow-kit/scripts/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+###########################################################################
+
+include $(TOPDIR)/.config
+include $(TOPDIR)/tools/Config.mk
+include $(TOPDIR)/tools/esp32/Config.mk
+include $(TOPDIR)/arch/xtensa/src/lx6/Toolchain.defs
+
+# This is the generated memory layout linker script. It will always be
+# generated at the board level.
+
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32_out.ld
+
+# Pick the linker scripts from the board level if they exist, if not
+# pick the common linker scripts.
+
+ifneq ($(wildcard $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32.ld),)
+ ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32.ld
+else
+ ifeq ($(CONFIG_BUILD_PROTECTED),y)
+ ARCHSCRIPT += $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)kernel-space.ld
+ else
+ ifeq ($(CONFIG_ESP32_APP_FORMAT_MCUBOOT),y)
+ ARCHSCRIPT += $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)esp32_mcuboot.ld
+ else
+ ARCHSCRIPT += $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)esp32.ld
+ endif
+ endif
+endif
+
+ifneq ($(wildcard $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32_rom.ld),)
+ ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32_rom.ld
+else
+ ARCHSCRIPT += $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)esp32_rom.ld
+endif
+
+ifneq ($(wildcard $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32.template.ld),)
+ LDSCRIPT_TEMPLATE = $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32.template.ld
+else
+ ifeq ($(CONFIG_BUILD_PROTECTED),y)
+ LDSCRIPT_TEMPLATE = $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)protected.template.ld
+ else
+ LDSCRIPT_TEMPLATE = $(BOARD_COMMON_DIR)$(DELIM)scripts$(DELIM)flat.template.ld
+ endif
+endif
+
+ARCHPICFLAGS = -fpic
+
+# if SPIRAM/PSRAM is used then we need to include a workaround
+
+ifeq ($(CONFIG_ESP32_SPIRAM),y)
+ ARCHCFLAGS += -mfix-esp32-psram-cache-issue
+endif
+
+CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+
+# Loadable module definitions
+
+CMODULEFLAGS = $(CFLAGS) -mtext-section-literals
+
+LDMODULEFLAGS = -r -e module_initialize
+LDMODULEFLAGS += -T $(call CONVERT_PATH,$(TOPDIR)/libs/libc/modlib/gnu-elf.ld)
+
+# ELF module definitions
+
+CELFFLAGS = $(CFLAGS) -mtext-section-literals
+CXXELFFLAGS = $(CXXFLAGS) -mtext-section-literals
+
+LDELFFLAGS = -r -e main
+LDELFFLAGS += -T $(call CONVERT_PATH,$(TOPDIR)$(DELIM)binfmt$(DELIM)libelf$(DELIM)gnu-elf.ld)
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/Make.defs b/boards/xtensa/esp32/esp32-sparrow-kit/src/Make.defs
new file mode 100644
index 0000000000..bb0a5de2b7
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/Make.defs
@@ -0,0 +1,66 @@
+#############################################################################
+# boards/xtensa/esp32/esp32-sparrow-kit/src/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+#############################################################################
+
+include $(TOPDIR)/Make.defs
+
+CONFIGFILE = $(TOPDIR)$(DELIM)include$(DELIM)nuttx$(DELIM)config.h
+
+CSRCS = esp32_boot.c esp32_bringup.c
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += esp32_autoleds.c
+else
+CSRCS += esp32_userleds.c
+endif
+
+ifeq ($(CONFIG_BOARDCTL),y)
+CSRCS += esp32_appinit.c
+ifeq ($(CONFIG_BOARDCTL_RESET),y)
+CSRCS += esp32_reset.c
+endif
+endif
+
+ifeq ($(CONFIG_MMCSD),y)
+CSRCS += esp32_mmcsd.c
+endif
+
+ifeq ($(CONFIG_DEV_GPIO),y)
+CSRCS += esp32_gpio.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += esp32_buttons.c
+endif
+
+SCRIPTOUT = $(BOARD_DIR)$(DELIM)scripts$(DELIM)esp32_out.ld
+
+.PHONY = context distclean
+
+$(SCRIPTOUT): $(LDSCRIPT_TEMPLATE) $(CONFIGFILE)
+ $(Q) $(CC) -isystem $(TOPDIR)/include -C -P -x c -E $(LDSCRIPT_TEMPLATE) -o $@
+
+context:: $(SCRIPTOUT)
+
+distclean::
+ $(call DELFILE, $(SCRIPTOUT))
+
+DEPPATH += --dep-path board
+VPATH += :board
+CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board)
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32-sparrow-kit.h b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32-sparrow-kit.h
new file mode 100644
index 0000000000..787ccf9939
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32-sparrow-kit.h
@@ -0,0 +1,118 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32-sparrow-kit.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_XTENSA_ESP32_ESP32_SPARROWKIT_SRC_ESP32_SPARROWKIT_H
+#define __BOARDS_XTENSA_ESP32_ESP32_SPARROWKIT_SRC_ESP32_SPARROWKIT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* ESP-SPARROW-KIT GPIOs ****************************************************/
+
+/* LEDs */
+
+#define GPIO_LED1 0
+#define GPIO_LED2 2
+#define GPIO_LED3 4
+
+/* BOOT Button */
+
+#define BUTTON_BOOT 0
+
+/* TIMERS */
+
+#define TIMER0 0
+#define TIMER1 1
+#define TIMER2 2
+#define TIMER3 3
+
+/* ONESHOT */
+
+#define ONESHOT_TIMER 1
+#define ONESHOT_RESOLUTION_US 1
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_bringup
+ *
+ * Description:
+ * Perform architecture-specific initialization
+ *
+ * CONFIG_BOARD_LATE_INITIALIZE=y :
+ * Called from board_late_initialize().
+ *
+ * CONFIG_BOARD_LATE_INITIALIZE=y && CONFIG_BOARDCTL=y :
+ * Called from the NSH library via board_app_initialize()
+ *
+ ****************************************************************************/
+
+int esp32_bringup(void);
+
+/****************************************************************************
+ * Name: esp32_mmcsd_initialize
+ *
+ * Description:
+ * Initialize SPI-based SD card and card detect thread.
+ *
+ ****************************************************************************/
+
+int esp32_mmcsd_initialize(int minor);
+
+/****************************************************************************
+ * Name: esp32_spiflash_init
+ *
+ * Description:
+ * Initialize the SPIFLASH and register the MTD device.
+ ****************************************************************************/
+
+int esp32_spiflash_init(void);
+
+/****************************************************************************
+ * Name: esp32_gpio_init
+ ****************************************************************************/
+
+#ifdef CONFIG_DEV_GPIO
+int esp32_gpio_init(void);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_XTENSA_ESP32_ESP32_SPARROWKIT_SRC_ESP32_SPARROWKIT_H */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_appinit.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_appinit.c
new file mode 100644
index 0000000000..cc5ff31e2f
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_appinit.c
@@ -0,0 +1,80 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_appinit.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <nuttx/board.h>
+
+#include "esp32-sparrow-kit.h"
+
+#ifdef CONFIG_BOARDCTL
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ * Perform application specific initialization. This function is never
+ * called directly from application code, but only indirectly via the
+ * (non-standard) boardctl() interface using the command BOARDIOC_INIT.
+ *
+ * Input Parameters:
+ * arg - The boardctl() argument is passed to the board_app_initialize()
+ * implementation without modification. The argument has no
+ * meaning to NuttX; the meaning of the argument is a contract
+ * between the board-specific initialization logic and the
+ * matching application logic. The value could be such things as a
+ * mode enumeration value, a set of DIP switch settings, a
+ * pointer to configuration data read from a file or serial FLASH,
+ * or whatever you would like to do with it. Every implementation
+ * should accept zero/NULL as a default configuration.
+ *
+ * Returned Value:
+ * Zero (OK) is returned on success; a negated errno value is returned on
+ * any failure to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int board_app_initialize(uintptr_t arg)
+{
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+ /* Board initialization already performed by board_late_initialize() */
+
+ return OK;
+#else
+ /* Perform board-specific initialization */
+
+ return esp32_bringup();
+#endif
+}
+
+#endif /* CONFIG_BOARDCTL */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_autoleds.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_autoleds.c
new file mode 100644
index 0000000000..74229dcada
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_autoleds.c
@@ -0,0 +1,185 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_autoleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "esp32_gpio.h"
+#include "esp32-sparrow-kit.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* The following definitions map the encoded LED setting to GPIO settings */
+
+#ifndef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+# define LED_STARTED_BITS (BOARD_LED2_BIT)
+# define LED_HEAPALLOCATE_BITS (BOARD_LED3_BIT)
+# define LED_IRQSENABLED_BITS (BOARD_LED3_BIT | BOARD_LED2_BIT)
+# define LED_STACKCREATED_BITS (BOARD_LED3_BIT)
+# define LED_INIRQ_BITS (BOARD_LED1_BIT | BOARD_LED3_BIT)
+# define LED_SIGNAL_BITS (BOARD_LED2_BIT | BOARD_LED3_BIT)
+# define LED_ASSERTION_BITS (BOARD_LED1_BIT | BOARD_LED2_BIT |\
+ BOARD_LED3_BIT)
+# define LED_PANIC_BITS (BOARD_LED1_BIT)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifndef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+static const unsigned int g_ledbits[8] =
+{
+ LED_STARTED_BITS,
+ LED_HEAPALLOCATE_BITS,
+ LED_IRQSENABLED_BITS,
+ LED_STACKCREATED_BITS,
+ LED_INIRQ_BITS,
+ LED_SIGNAL_BITS,
+ LED_ASSERTION_BITS,
+ LED_PANIC_BITS
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static inline void led_clrbits(unsigned int clrbits)
+{
+ if ((clrbits & BOARD_LED1_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED1, false);
+ }
+
+ if ((clrbits & BOARD_LED2_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED2, false);
+ }
+
+ if ((clrbits & BOARD_LED3_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED3, false);
+ }
+}
+
+static inline void led_setbits(unsigned int setbits)
+{
+ if ((setbits & BOARD_LED1_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED1, true);
+ }
+
+ if ((setbits & BOARD_LED2_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED2, true);
+ }
+
+ if ((setbits & BOARD_LED3_BIT) != 0)
+ {
+ esp32_gpiowrite(GPIO_LED3, true);
+ }
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_autoled_initialize
+ ****************************************************************************/
+
+void board_autoled_initialize(void)
+{
+ /* Configure LED1-4 GPIOs for output */
+
+ esp32_configgpio(GPIO_LED1, OUTPUT);
+ esp32_configgpio(GPIO_LED2, OUTPUT);
+ esp32_configgpio(GPIO_LED3, OUTPUT);
+}
+
+/****************************************************************************
+ * Name: board_autoled_on
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+#ifdef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+ switch (led)
+ {
+ case LED_CPU0:
+ esp32_gpiowrite(GPIO_LED1, true);
+ break;
+ case LED_CPU1:
+ esp32_gpiowrite(GPIO_LED2, true);
+ break;
+ case LED_HEAPALLOCATE:
+ esp32_gpiowrite(GPIO_LED3, true);
+ break;
+ default:
+ break;
+ }
+#else
+ led_clrbits(BOARD_LED1_BIT | BOARD_LED2_BIT | BOARD_LED3_BIT);
+ led_setbits(g_ledbits[led]);
+#endif
+}
+
+/****************************************************************************
+ * Name: board_autoled_off
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+#ifdef CONFIG_ARCH_LEDS_CPU_ACTIVITY
+ switch (led)
+ {
+ case LED_CPU0:
+ esp32_gpiowrite(GPIO_LED1, false);
+ break;
+ case LED_CPU1:
+ esp32_gpiowrite(GPIO_LED2, false);
+ break;
+ case LED_HEAPALLOCATE:
+ esp32_gpiowrite(GPIO_LED3, false);
+ break;
+ default:
+ break;
+ }
+#else
+ led_clrbits(g_ledbits[led]);
+#endif
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_boot.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_boot.c
new file mode 100644
index 0000000000..e7ce03815f
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_boot.c
@@ -0,0 +1,101 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_boot.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <nuttx/mm/mm.h>
+#include <arch/board/board.h>
+#include <arch/esp32/memory_layout.h>
+
+#include "esp32-sparrow-kit.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_board_initialize
+ *
+ * Description:
+ * All ESP32 architectures must provide the following entry point.
+ * This entry point is called early in the initialization -- after all
+ * memory has been configured and mapped but before any devices have been
+ * initialized.
+ *
+ ****************************************************************************/
+
+void esp32_board_initialize(void)
+{
+ /* Configure on-board LEDs if LED support has been selected. */
+
+#ifdef CONFIG_ARCH_LEDS
+ board_autoled_initialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_late_initialize
+ *
+ * Description:
+ * If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
+ * initialization call will be performed in the boot-up sequence to a
+ * function called board_late_initialize(). board_late_initialize() will
+ * be called immediately after up_initialize() is called and just before
+ * the initial application is started. This additional initialization
+ * phase may be used, for example, to initialize board-specific device
+ * drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+void board_late_initialize(void)
+{
+ /* Perform board-specific initialization */
+
+ esp32_bringup();
+
+#ifdef CONFIG_SMP
+ /* To avoid corrupting the heap, this region of memory (~3KB) is not
+ * included until the APP CPU has started.
+ * So we can't add it with the rest of the regions at xtensa_add_region(),
+ * that function is called early from up_initialize(). We wait until the
+ * SMP bringup is complete.
+ */
+
+ umm_addregion((void *)HEAP_REGION_ROMAPP_START,
+ (size_t)(HEAP_REGION_ROMAPP_END - HEAP_REGION_ROMAPP_START));
+#endif
+}
+#endif
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_bringup.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_bringup.c
new file mode 100644
index 0000000000..77be5e2c5f
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_bringup.c
@@ -0,0 +1,395 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_bringup.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <syslog.h>
+#include <debug.h>
+#include <stdio.h>
+
+#include <syslog.h>
+#include <errno.h>
+#include <nuttx/fs/fs.h>
+#include <nuttx/himem/himem.h>
+
+#include "esp32_partition.h"
+
+#include <arch/board/board.h>
+
+#ifdef CONFIG_USERLED
+# include <nuttx/leds/userled.h>
+#endif
+
+#ifdef CONFIG_TIMER
+#include <esp32_tim_lowerhalf.h>
+#endif
+
+#ifdef CONFIG_ONESHOT
+# include "esp32_board_oneshot.h"
+#endif
+
+#ifdef CONFIG_WATCHDOG
+# include "esp32_board_wdt.h"
+#endif
+
+#ifdef CONFIG_ESP32_SPIFLASH
+# include "esp32_board_spiflash.h"
+#endif
+
+#ifdef CONFIG_ESP32_BLE
+# include "esp32_ble.h"
+#endif
+
+#ifdef CONFIG_ESP32_WIFI
+# include "esp32_board_wlan.h"
+#endif
+
+#ifdef CONFIG_ESP32_I2C
+# include "esp32_board_i2c.h"
+#endif
+
+#ifdef CONFIG_SENSORS_BMP180
+# include "esp32_bmp180.h"
+#endif
+
+#ifdef CONFIG_INPUT_BUTTONS
+# include <nuttx/input/buttons.h>
+#endif
+
+#ifdef CONFIG_VIDEO_FB
+# include <nuttx/video/fb.h>
+#endif
+
+#ifdef CONFIG_ESP32_RT_TIMER
+# include "esp32_rt_timer.h"
+#endif
+
+#ifdef CONFIG_LCD_DEV
+# include <nuttx/board.h>
+# include <nuttx/lcd/lcd_dev.h>
+#endif
+
+#ifdef CONFIG_RTC_DRIVER
+# include "esp32_rtc_lowerhalf.h"
+#endif
+
+#ifdef CONFIG_LCD_BACKPACK
+# include "esp32_lcd_backpack.h"
+#endif
+
+#include "esp32-sparrow-kit.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_bringup
+ *
+ * Description:
+ * Perform architecture-specific initialization
+ *
+ * CONFIG_BOARD_LATE_INITIALIZE=y :
+ * Called from board_late_initialize().
+ *
+ * CONFIG_BOARD_LATE_INITIALIZE=n && CONFIG_BOARDCTL=y :
+ * Called from the NSH library
+ *
+ ****************************************************************************/
+
+int esp32_bringup(void)
+{
+ int ret;
+
+#if defined(CONFIG_ESP32_SPIRAM) && \
+ defined(CONFIG_ESP32_SPIRAM_BANKSWITCH_ENABLE)
+ ret = esp_himem_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to init HIMEM: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_FS_PROCFS
+ /* Mount the procfs file system */
+
+ ret = nx_mount(NULL, "/proc", "procfs", 0, NULL);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to mount procfs at /proc: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_FS_TMPFS
+ /* Mount the tmpfs file system */
+
+ ret = nx_mount(NULL, CONFIG_LIBC_TMPDIR, "tmpfs", 0, NULL);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to mount tmpfs at %s: %d\n",
+ CONFIG_LIBC_TMPDIR, ret);
+ }
+#endif
+
+#ifdef CONFIG_LCD_BACKPACK
+ /* slcd:0, i2c:0, rows=2, cols=16 */
+
+ ret = board_lcd_backpack_init(0, 0, 2, 16);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize PCF8574 LCD, error %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_MMCSD
+ ret = esp32_mmcsd_initialize(0);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize SD slot: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_SPIFLASH
+ ret = esp32_spiflash_init();
+ if (ret)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize SPI Flash\n");
+ }
+#endif
+
+#ifdef CONFIG_ESP32_PARTITION_TABLE
+ ret = esp32_partition_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize partition error=%d\n",
+ ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_RT_TIMER
+ ret = esp32_rt_timer_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize RT timer: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_BLE
+ ret = esp32_ble_initialize();
+ if (ret)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize BLE: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_WIFI
+ ret = board_wlan_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize wireless subsystem=%d\n",
+ ret);
+ }
+#endif
+
+/* First, register the timer drivers and let timer 1 for oneshot
+ * if it is enabled.
+ */
+
+#ifdef CONFIG_TIMER
+
+#if defined(CONFIG_ESP32_TIMER0) && !defined(CONFIG_ESP32_RT_TIMER)
+ ret = esp32_timer_initialize("/dev/timer0", TIMER0);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to initialize timer driver: %d\n",
+ ret);
+ }
+#endif
+
+#if defined(CONFIG_ESP32_TIMER1) && !defined(CONFIG_ONESHOT)
+ ret = esp32_timer_initialize("/dev/timer1", TIMER1);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to initialize timer driver: %d\n",
+ ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_TIMER2
+ ret = esp32_timer_initialize("/dev/timer2", TIMER2);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to initialize timer driver: %d\n",
+ ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_TIMER3
+ ret = esp32_timer_initialize("/dev/timer3", TIMER3);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to initialize timer driver: %d\n",
+ ret);
+ }
+#endif
+
+#endif /* CONFIG_TIMER */
+
+ /* Now register one oneshot driver */
+
+#if defined(CONFIG_ONESHOT) && defined(CONFIG_ESP32_TIMER1)
+
+ ret = esp32_oneshot_init(ONESHOT_TIMER, ONESHOT_RESOLUTION_US);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: esp32_oneshot_init() failed: %d\n", ret);
+ }
+
+#endif /* CONFIG_ONESHOT */
+
+#ifdef CONFIG_USERLED
+ /* Register the LED driver */
+
+ ret = userled_lower_initialize("/dev/userleds");
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_WATCHDOG
+ /* Configure watchdog timer */
+
+ ret = board_wdt_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to initialize watchdog drivers: %d\n",
+ ret);
+ }
+#endif
+
+#ifdef CONFIG_DEV_GPIO
+ ret = esp32_gpio_init();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize GPIO Driver: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_I2C_DRIVER
+
+#ifdef CONFIG_ESP32_I2C0
+ ret = esp32_i2c_register(0);
+
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize I2C Driver for I2C0: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_ESP32_I2C1
+ ret = esp32_i2c_register(1);
+
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize I2C Driver for I2C1: %d\n", ret);
+ }
+#endif
+
+#endif
+
+#ifdef CONFIG_SENSORS_BMP180
+ /* Try to register BMP180 device in I2C0 */
+
+ ret = board_bmp180_initialize(0, 0);
+
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "Failed to initialize BMP180 driver: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_INPUT_BUTTONS
+ /* Register the BUTTON driver */
+
+ ret = btn_lower_initialize("/dev/buttons");
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: btn_lower_initialize() failed: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_VIDEO_FB
+ ret = fb_register(0, 0);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize Frame Buffer Driver.\n");
+ }
+#endif
+
+#ifdef CONFIG_LCD_DEV
+ ret = board_lcd_initialize();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: board_lcd_initialize() failed: %d\n", ret);
+ }
+
+ ret = lcddev_register(0);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: lcddev_register() failed: %d\n", ret);
+ }
+#endif
+
+#ifdef CONFIG_RTC_DRIVER
+ /* Instantiate the ESP32 RTC driver */
+
+ ret = esp32_rtc_driverinit();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR,
+ "ERROR: Failed to Instantiate the RTC driver: %d\n", ret);
+ }
+#endif
+
+ /* If we got here then perhaps not all initialization was successful, but
+ * at least enough succeeded to bring-up NSH with perhaps reduced
+ * capabilities.
+ */
+
+ UNUSED(ret);
+ return OK;
+}
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_buttons.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_buttons.c
new file mode 100644
index 0000000000..66096be619
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_buttons.c
@@ -0,0 +1,166 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_buttons.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <assert.h>
+#include <debug.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <nuttx/irq.h>
+#include <arch/irq.h>
+
+#include "esp32_gpio.h"
+
+#include "esp32-sparrow-kit.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ * board_button_initialize() must be called to initialize button resources.
+ * After that, board_buttons() may be called to collect the current state
+ * of all buttons or board_button_irq() may be called to register button
+ * interrupt handlers.
+ *
+ ****************************************************************************/
+
+uint32_t board_button_initialize(void)
+{
+ esp32_configgpio(BUTTON_BOOT, INPUT_FUNCTION_3 | PULLUP);
+ return 1;
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ * After board_button_initialize() has been called, board_buttons() may be
+ * called to collect the state of all buttons. board_buttons() returns an
+ * 8-bit bit set with each bit associated with a button. See the
+ * BUTTON_*_BIT definitions in board.h for the meaning of each bit.
+ *
+ ****************************************************************************/
+
+uint32_t board_buttons(void)
+{
+ uint8_t ret = 0;
+ int i = 0;
+ int n = 0;
+
+ bool b0 = esp32_gpioread(BUTTON_BOOT);
+
+ for (i = 0; i < 10; i++)
+ {
+ up_mdelay(1); /* TODO */
+
+ bool b1 = esp32_gpioread(BUTTON_BOOT);
+
+ if (b0 == b1)
+ {
+ n++;
+ }
+ else
+ {
+ n = 0;
+ }
+
+ if (3 == n)
+ {
+ break;
+ }
+
+ b0 = b1;
+ }
+
+ iinfo("b=%d n=%d\n", b0, n);
+
+ /* Low value means that the button is pressed */
+
+ if (!b0)
+ {
+ ret = 0x1;
+ }
+
+ return ret;
+}
+
+/****************************************************************************
+ * Name: board_button_irq
+ *
+ * Description:
+ * board_button_irq() may be called to register an interrupt handler that
+ * will be called when a button is depressed or released. The ID value is
+ * a button enumeration value that uniquely identifies a button resource.
+ * See the BUTTON_* definitions in board.h for the meaning of enumeration
+ * value.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_IRQBUTTONS
+int board_button_irq(int id, xcpt_t irqhandler, void *arg)
+{
+ int ret;
+ DEBUGASSERT(id == BUTTON_BOOT);
+
+ int irq = ESP32_PIN2IRQ(BUTTON_BOOT);
+
+ if (NULL != irqhandler)
+ {
+ /* Make sure the interrupt is disabled */
+
+ esp32_gpioirqdisable(irq);
+
+ ret = irq_attach(irq, irqhandler, arg);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: irq_attach() failed: %d\n", ret);
+ return ret;
+ }
+
+ gpioinfo("Attach %p\n", irqhandler);
+
+ gpioinfo("Enabling the interrupt\n");
+
+ /* Configure the interrupt for rising and falling edges */
+
+ esp32_gpioirqenable(irq, CHANGE);
+ }
+ else
+ {
+ gpioinfo("Disable the interrupt\n");
+ esp32_gpioirqdisable(irq);
+ }
+
+ return OK;
+}
+#endif
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_gpio.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_gpio.c
new file mode 100644
index 0000000000..a2c455ac7e
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_gpio.c
@@ -0,0 +1,391 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_gpio.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <nuttx/irq.h>
+#include <arch/irq.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/ioexpander/gpio.h>
+
+#include <arch/board/board.h>
+
+#include "esp32-sparrow-kit.h"
+#include "esp32_gpio.h"
+#include "hardware/esp32_gpio_sigmap.h"
+
+#if defined(CONFIG_DEV_GPIO) && !defined(CONFIG_GPIO_LOWER_HALF)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#if !defined(CONFIG_ESP32_GPIO_IRQ) && BOARD_NGPIOINT > 0
+# error "NGPIOINT is > 0 and GPIO interrupts aren't enabled"
+#endif
+
+/* Output pins. GPIO16 is used as an example, any other outputs could be
+ * used.
+ */
+
+#define GPIO_OUT1 16
+
+/* Input pins. GPIO17 is used as an example, any other inputs could be
+ * used.
+ */
+
+#define GPIO_IN1 17
+
+/* Interrupt pins. GPIO22 is used as an example, any other inputs could be
+ * used.
+ */
+
+#define GPIO_IRQPIN1 22
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct esp32gpio_dev_s
+{
+ struct gpio_dev_s gpio;
+ uint8_t id;
+};
+
+struct esp32gpint_dev_s
+{
+ struct esp32gpio_dev_s esp32gpio;
+ pin_interrupt_t callback;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+#if BOARD_NGPIOOUT > 0
+static int gpout_read(struct gpio_dev_s *dev, bool *value);
+static int gpout_write(struct gpio_dev_s *dev, bool value);
+#endif
+
+#if BOARD_NGPIOIN > 0
+static int gpin_read(struct gpio_dev_s *dev, bool *value);
+#endif
+
+#if BOARD_NGPIOINT > 0
+static int gpint_read(struct gpio_dev_s *dev, bool *value);
+static int gpint_attach(struct gpio_dev_s *dev,
+ pin_interrupt_t callback);
+static int gpint_enable(struct gpio_dev_s *dev, bool enable);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if BOARD_NGPIOOUT > 0
+static const struct gpio_operations_s gpout_ops =
+{
+ .go_read = gpout_read,
+ .go_write = gpout_write,
+ .go_attach = NULL,
+ .go_enable = NULL,
+};
+
+/* This array maps the GPIO pins used as OUTPUT */
+
+static const uint32_t g_gpiooutputs[BOARD_NGPIOOUT] =
+{
+ GPIO_OUT1
+};
+
+static struct esp32gpio_dev_s g_gpout[BOARD_NGPIOOUT];
+#endif
+
+#if BOARD_NGPIOIN > 0
+static const struct gpio_operations_s gpin_ops =
+{
+ .go_read = gpin_read,
+ .go_write = NULL,
+ .go_attach = NULL,
+ .go_enable = NULL,
+};
+
+/* This array maps the GPIO pins used as INTERRUPT INPUTS */
+
+static const uint32_t g_gpioinputs[BOARD_NGPIOIN] =
+{
+ GPIO_IN1
+};
+
+static struct esp32gpio_dev_s g_gpin[BOARD_NGPIOIN];
+#endif
+
+#if BOARD_NGPIOINT > 0
+static const struct gpio_operations_s gpint_ops =
+{
+ .go_read = gpint_read,
+ .go_write = NULL,
+ .go_attach = gpint_attach,
+ .go_enable = gpint_enable,
+};
+
+/* This array maps the GPIO pins used as INTERRUPT INPUTS */
+
+static const uint32_t g_gpiointinputs[BOARD_NGPIOINT] =
+{
+ GPIO_IRQPIN1,
+};
+
+static struct esp32gpint_dev_s g_gpint[BOARD_NGPIOINT];
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: gpout_read
+ ****************************************************************************/
+
+#if BOARD_NGPIOOUT > 0
+static int gpout_read(struct gpio_dev_s *dev, bool *value)
+{
+ struct esp32gpio_dev_s *esp32gpio = (struct esp32gpio_dev_s *)dev;
+
+ DEBUGASSERT(esp32gpio != NULL && value != NULL);
+ DEBUGASSERT(esp32gpio->id < BOARD_NGPIOOUT);
+ gpioinfo("Reading...\n");
+
+ *value = esp32_gpioread(g_gpiooutputs[esp32gpio->id]);
+ return OK;
+}
+
+/****************************************************************************
+ * Name: gpout_write
+ ****************************************************************************/
+
+static int gpout_write(struct gpio_dev_s *dev, bool value)
+{
+ struct esp32gpio_dev_s *esp32gpio = (struct esp32gpio_dev_s *)dev;
+
+ DEBUGASSERT(esp32gpio != NULL);
+ DEBUGASSERT(esp32gpio->id < BOARD_NGPIOOUT);
+ gpioinfo("Writing %d\n", (int)value);
+
+ esp32_gpiowrite(g_gpiooutputs[esp32gpio->id], value);
+ return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: gpin_read
+ ****************************************************************************/
+
+#if BOARD_NGPIOIN > 0
+static int gpin_read(struct gpio_dev_s *dev, bool *value)
+{
+ struct esp32gpio_dev_s *esp32gpio = (struct esp32gpio_dev_s *)dev;
+
+ DEBUGASSERT(esp32gpio != NULL && value != NULL);
+ DEBUGASSERT(esp32gpio->id < BOARD_NGPIOIN);
+ gpioinfo("Reading... pin %d\n", g_gpioinputs[esp32gpio->id]);
+
+ *value = esp32_gpioread(g_gpioinputs[esp32gpio->id]);
+ return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: esp32gpio_interrupt
+ ****************************************************************************/
+
+#if BOARD_NGPIOINT > 0
+static int esp32gpio_interrupt(int irq, void *context, void *arg)
+{
+ struct esp32gpint_dev_s *esp32gpint =
+ (struct esp32gpint_dev_s *)arg;
+
+ DEBUGASSERT(esp32gpint != NULL && esp32gpint->callback != NULL);
+ gpioinfo("Interrupt! callback=%p\n", esp32gpint->callback);
+
+ esp32gpint->callback(&esp32gpint->esp32gpio.gpio,
+ esp32gpint->esp32gpio.id);
+ return OK;
+}
+
+/****************************************************************************
+ * Name: gpint_read
+ ****************************************************************************/
+
+static int gpint_read(struct gpio_dev_s *dev, bool *value)
+{
+ struct esp32gpint_dev_s *esp32gpint =
+ (struct esp32gpint_dev_s *)dev;
+
+ DEBUGASSERT(esp32gpint != NULL && value != NULL);
+ DEBUGASSERT(esp32gpint->esp32gpio.id < BOARD_NGPIOINT);
+ gpioinfo("Reading int pin...\n");
+
+ *value = esp32_gpioread(g_gpiointinputs[esp32gpint->esp32gpio.id]);
+ return OK;
+}
+
+/****************************************************************************
+ * Name: gpint_attach
+ ****************************************************************************/
+
+static int gpint_attach(struct gpio_dev_s *dev,
+ pin_interrupt_t callback)
+{
+ struct esp32gpint_dev_s *esp32gpint =
+ (struct esp32gpint_dev_s *)dev;
+ int irq = ESP32_PIN2IRQ(g_gpiointinputs[esp32gpint->esp32gpio.id]);
+ int ret;
+
+ gpioinfo("Attaching the callback\n");
+
+ /* Make sure the interrupt is disabled */
+
+ esp32_gpioirqdisable(irq);
+ ret = irq_attach(irq,
+ esp32gpio_interrupt,
+ &g_gpint[esp32gpint->esp32gpio.id]);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: gpint_attach() failed: %d\n", ret);
+ return ret;
+ }
+
+ gpioinfo("Attach %p\n", callback);
+ esp32gpint->callback = callback;
+ return OK;
+}
+
+/****************************************************************************
+ * Name: gpint_enable
+ ****************************************************************************/
+
+static int gpint_enable(struct gpio_dev_s *dev, bool enable)
+{
+ struct esp32gpint_dev_s *esp32gpint =
+ (struct esp32gpint_dev_s *)dev;
+ int irq = ESP32_PIN2IRQ(g_gpiointinputs[esp32gpint->esp32gpio.id]);
+
+ if (enable)
+ {
+ if (esp32gpint->callback != NULL)
+ {
+ gpioinfo("Enabling the interrupt\n");
+
+ /* Configure the interrupt for rising edge */
+
+ esp32_gpioirqenable(irq, RISING);
+ }
+ }
+ else
+ {
+ gpioinfo("Disable the interrupt\n");
+ esp32_gpioirqdisable(irq);
+ }
+
+ return OK;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_gpio_init
+ ****************************************************************************/
+
+int esp32_gpio_init(void)
+{
+ int pincount = 0;
+ int i;
+
+#if BOARD_NGPIOOUT > 0
+ for (i = 0; i < BOARD_NGPIOOUT; i++)
+ {
+ /* Setup and register the GPIO pin */
+
+ g_gpout[i].gpio.gp_pintype = GPIO_OUTPUT_PIN;
+ g_gpout[i].gpio.gp_ops = &gpout_ops;
+ g_gpout[i].id = i;
+ gpio_pin_register(&g_gpout[i].gpio, pincount);
+
+ /* Configure the pins that will be used as output */
+
+ esp32_gpio_matrix_out(g_gpiooutputs[i], SIG_GPIO_OUT_IDX, 0, 0);
+ esp32_configgpio(g_gpiooutputs[i], OUTPUT_FUNCTION_3 |
+ INPUT_FUNCTION_3);
+ esp32_gpiowrite(g_gpiooutputs[i], 0);
+
+ pincount++;
+ }
+#endif
+
+#if BOARD_NGPIOIN > 0
+ for (i = 0; i < BOARD_NGPIOIN; i++)
+ {
+ /* Setup and register the GPIO pin */
+
+ g_gpin[i].gpio.gp_pintype = GPIO_INPUT_PIN;
+ g_gpin[i].gpio.gp_ops = &gpin_ops;
+ g_gpin[i].id = i;
+ gpio_pin_register(&g_gpin[i].gpio, pincount);
+
+ /* Configure the pins that will be used as INPUT */
+
+ esp32_configgpio(g_gpioinputs[i], INPUT_FUNCTION_3);
+
+ pincount++;
+ }
+#endif
+
+#if BOARD_NGPIOINT > 0
+ for (i = 0; i < BOARD_NGPIOINT; i++)
+ {
+ /* Setup and register the GPIO pin */
+
+ g_gpint[i].esp32gpio.gpio.gp_pintype = GPIO_INTERRUPT_PIN;
+ g_gpint[i].esp32gpio.gpio.gp_ops = &gpint_ops;
+ g_gpint[i].esp32gpio.id = i;
+ gpio_pin_register(&g_gpint[i].esp32gpio.gpio, pincount);
+
+ /* Configure the pins that will be used as interrupt input */
+
+ esp32_configgpio(g_gpiointinputs[i], INPUT_FUNCTION_3 | PULLDOWN);
+
+ pincount++;
+ }
+#endif
+
+ return OK;
+}
+#endif /* CONFIG_DEV_GPIO && !CONFIG_GPIO_LOWER_HALF */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_mmcsd.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_mmcsd.c
new file mode 100644
index 0000000000..6dc3afda83
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_mmcsd.c
@@ -0,0 +1,84 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_mmcsd.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <debug.h>
+#include <nuttx/config.h>
+#include <nuttx/mmcsd.h>
+#include <nuttx/spi/spi.h>
+#include <pthread.h>
+#include <sched.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "esp32_spi.h"
+#include "esp32-sparrow-kit.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_mmcsd_initialize
+ *
+ * Description:
+ * Initialize SPI-based SD card and card detect thread.
+ ****************************************************************************/
+
+int esp32_mmcsd_initialize(int minor)
+{
+ struct spi_dev_s *spi;
+ int rv;
+
+ mcinfo("INFO: Initializing mmcsd card\n");
+
+ spi = esp32_spibus_initialize(CONFIG_NSH_MMCSDSPIPORTNO);
+ if (spi == NULL)
+ {
+ mcerr("ERROR: Failed to initialize SPI port %d\n", 2);
+ return -ENODEV;
+ }
+
+ rv = mmcsd_spislotinitialize(minor, 0, spi);
+ if (rv < 0)
+ {
+ mcerr("ERROR: Failed to bind SPI port %d to SD slot %d\n",
+ 2, 0);
+ return rv;
+ }
+
+ spiinfo("INFO: mmcsd card has been initialized successfully\n");
+ return OK;
+}
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_reset.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_reset.c
new file mode 100644
index 0000000000..e77dac3805
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_reset.c
@@ -0,0 +1,63 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_reset.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+
+#ifdef CONFIG_BOARDCTL_RESET
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_reset
+ *
+ * Description:
+ * Reset board. Support for this function is required by board-level
+ * logic if CONFIG_BOARDCTL_RESET is selected.
+ *
+ * Input Parameters:
+ * status - Status information provided with the reset event. This
+ * meaning of this status information is board-specific. If not
+ * used by a board, the value zero may be provided in calls to
+ * board_reset().
+ *
+ * Returned Value:
+ * If this function returns, then it was not possible to power-off the
+ * board due to some constraints. The return value in this case is a
+ * board-specific reason for the failure to shutdown.
+ *
+ ****************************************************************************/
+
+int board_reset(int status)
+{
+ up_systemreset();
+
+ return 0;
+}
+
+#endif /* CONFIG_BOARDCTL_RESET */
diff --git a/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_userleds.c b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_userleds.c
new file mode 100644
index 0000000000..a1b49875d8
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_userleds.c
@@ -0,0 +1,94 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-sparrow-kit/src/esp32_userleds.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "esp32_gpio.h"
+#include "esp32-sparrow-kit.h"
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* This array maps an LED number to GPIO pin configuration */
+
+static const uint32_t g_ledcfg[BOARD_NLEDS] =
+{
+ GPIO_LED1, GPIO_LED2, GPIO_LED3
+};
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_userled_initialize
+ ****************************************************************************/
+
+uint32_t board_userled_initialize(void)
+{
+ uint8_t i;
+
+ /* Configure the LEDs GPIOs as outputs */
+
+ for (i = 0; i < BOARD_NLEDS; i++)
+ {
+ esp32_configgpio(g_ledcfg[i], OUTPUT);
+ }
+
+ return BOARD_NLEDS;
+}
+
+/****************************************************************************
+ * Name: board_userled
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+ if ((unsigned)led < BOARD_NLEDS)
+ {
+ esp32_gpiowrite(g_ledcfg[led], ledon);
+ }
+}
+
+/****************************************************************************
+ * Name: board_userled_all
+ ****************************************************************************/
+
+void board_userled_all(uint32_t ledset)
+{
+ uint8_t i;
+
+ for (i = 0; i < BOARD_NLEDS; i++)
+ {
+ esp32_gpiowrite(g_ledcfg[i], (ledset & (1 << i)) != 0);
+ }
+}