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Posted to commits@nuttx.apache.org by pk...@apache.org on 2022/01/08 13:47:01 UTC
[incubator-nuttx] 02/02: esp32-devkitc: Add support to PWM
This is an automated email from the ASF dual-hosted git repository.
pkarashchenko pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
commit d7ec3e30aeedce5575a57ffddce3907660c37ae2
Author: Alan C. Assis <ac...@gmail.com>
AuthorDate: Thu Jan 6 14:13:58 2022 -0300
esp32-devkitc: Add support to PWM
---
.../esp32/esp32-devkitc/configs/pwm/defconfig | 55 +++++++++
boards/xtensa/esp32/esp32-devkitc/src/Make.defs | 4 +
.../xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h | 12 ++
.../xtensa/esp32/esp32-devkitc/src/esp32_bringup.c | 8 ++
boards/xtensa/esp32/esp32-devkitc/src/esp32_ledc.c | 134 +++++++++++++++++++++
5 files changed, 213 insertions(+)
diff --git a/boards/xtensa/esp32/esp32-devkitc/configs/pwm/defconfig b/boards/xtensa/esp32/esp32-devkitc/configs/pwm/defconfig
new file mode 100644
index 0000000..0a620e4
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-devkitc/configs/pwm/defconfig
@@ -0,0 +1,55 @@
+#
+# 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-devkitc"
+CONFIG_ARCH_BOARD_ESP32_DEVKITC=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_LEDC=y
+CONFIG_ESP32_LEDC_CHANNEL0_PIN=12
+CONFIG_ESP32_LEDC_CHANNEL1_PIN=13
+CONFIG_ESP32_LEDC_CHANNEL2_PIN=14
+CONFIG_ESP32_LEDC_CHANNEL3_PIN=15
+CONFIG_ESP32_LEDC_TIM0=y
+CONFIG_ESP32_LEDC_TIM1=y
+CONFIG_ESP32_UART0=y
+CONFIG_EXAMPLES_PWM=y
+CONFIG_EXAMPLES_PWM_FREQUENCY=10000
+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_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=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-devkitc/src/Make.defs b/boards/xtensa/esp32/esp32-devkitc/src/Make.defs
index 9400680..dcc7c6b 100644
--- a/boards/xtensa/esp32/esp32-devkitc/src/Make.defs
+++ b/boards/xtensa/esp32/esp32-devkitc/src/Make.defs
@@ -39,6 +39,10 @@ ifeq ($(CONFIG_DEV_GPIO),y)
CSRCS += esp32_gpio.c
endif
+ifeq ($(CONFIG_PWM),y)
+CSRCS += esp32_ledc.c
+endif
+
ifeq ($(CONFIG_USERLED),y)
CSRCS += esp32_userleds.c
endif
diff --git a/boards/xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h b/boards/xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h
index ed50556..2640f5a 100644
--- a/boards/xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h
+++ b/boards/xtensa/esp32/esp32-devkitc/src/esp32-devkitc.h
@@ -110,6 +110,18 @@ int esp32_gpio_init(void);
#endif
/****************************************************************************
+ * Name: esp32_ledc_setup
+ *
+ * Description:
+ * Initialize LEDC PWM and register the PWM device.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ESP32_LEDC
+int esp32_pwm_setup(void);
+#endif
+
+/****************************************************************************
* Name: board_spidev_initialize
*
* Description:
diff --git a/boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c b/boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c
index b14cab0..393e902 100644
--- a/boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c
+++ b/boards/xtensa/esp32/esp32-devkitc/src/esp32_bringup.c
@@ -223,6 +223,14 @@ int esp32_bringup(void)
}
#endif
+#ifdef CONFIG_ESP32_LEDC
+ ret = esp32_pwm_setup();
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: esp32_pwm_setup() failed: %d\n", ret);
+ }
+#endif /* CONFIG_ESP32_LEDC */
+
#ifdef CONFIG_ESP32_RT_TIMER
ret = esp32_rt_timer_init();
if (ret < 0)
diff --git a/boards/xtensa/esp32/esp32-devkitc/src/esp32_ledc.c b/boards/xtensa/esp32/esp32-devkitc/src/esp32_ledc.c
new file mode 100644
index 0000000..ed85838
--- /dev/null
+++ b/boards/xtensa/esp32/esp32-devkitc/src/esp32_ledc.c
@@ -0,0 +1,134 @@
+/****************************************************************************
+ * boards/xtensa/esp32/esp32-devkitc/src/esp32_ledc.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 <errno.h>
+#include <debug.h>
+
+#include <nuttx/board.h>
+#include <nuttx/timers/pwm.h>
+
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "esp32_ledc.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: esp32_pwm_setup
+ *
+ * Description:
+ * Initialize LEDC PWM and register the PWM device.
+ *
+ ****************************************************************************/
+
+int esp32_pwm_setup(void)
+{
+ int ret;
+ struct pwm_lowerhalf_s *pwm;
+
+#ifdef CONFIG_ESP32_LEDC_TIM0
+ pwm = esp32_ledc_init(0);
+ if (!pwm)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 0 lower half\n");
+ return -ENODEV;
+ }
+
+ /* Register the PWM driver at "/dev/pwm0" */
+
+ ret = pwm_register("/dev/pwm0", pwm);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
+ return ret;
+ }
+#endif
+
+#ifdef CONFIG_ESP32_LEDC_TIM1
+ pwm = esp32_ledc_init(1);
+ if (!pwm)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 1 lower half\n");
+ return -ENODEV;
+ }
+
+ /* Register the PWM driver at "/dev/pwm1" */
+
+ ret = pwm_register("/dev/pwm1", pwm);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
+ return ret;
+ }
+#endif
+
+#ifdef CONFIG_ESP32_LEDC_TIM2
+ pwm = esp32_ledc_init(2);
+ if (!pwm)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 2 lower half\n");
+ return -ENODEV;
+ }
+
+ /* Register the PWM driver at "/dev/pwm2" */
+
+ ret = pwm_register("/dev/pwm2", pwm);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
+ return ret;
+ }
+#endif
+
+#ifdef CONFIG_ESP32_LEDC_TIM3
+ pwm = esp32_ledc_init(3);
+ if (!pwm)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 3 lower half\n");
+ return -ENODEV;
+ }
+
+ /* Register the PWM driver at "/dev/pwm3" */
+
+ ret = pwm_register("/dev/pwm3", pwm);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
+ return ret;
+ }
+#endif
+
+ return OK;
+}
+