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Posted to commits@nuttx.apache.org by ac...@apache.org on 2023/10/29 23:50:06 UTC
(nuttx) branch master updated: Documentation: add documentation for STM32F401RC-RS485 board
This is an automated email from the ASF dual-hosted git repository.
acassis pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new 54a16e8f74 Documentation: add documentation for STM32F401RC-RS485 board
54a16e8f74 is described below
commit 54a16e8f74ebf352b5dd5ad0307984a934ab9488
Author: Rodrigo Sim <rc...@gmail.com>
AuthorDate: Sun Oct 29 18:26:18 2023 -0300
Documentation: add documentation for STM32F401RC-RS485 board
---
.../arm/stm32f4/boards/stm32f401rc-rs485/index.rst | 194 +++++++++++++++++++++
.../boards/stm32f401rc-rs485/stm32f401rc_rs485.jpg | Bin 0 -> 192588 bytes
2 files changed, 194 insertions(+)
diff --git a/Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/index.rst b/Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/index.rst
new file mode 100644
index 0000000000..2950454fbf
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@@ -0,0 +1,194 @@
+=================
+stm32f401rc-rs485
+=================
+
+This page discusses issues unique to NuttX configurations for the
+NuttX STM32F4-RS485 development board.
+
+.. figure:: stm32f401rc_rs485.jpg
+ :align: center
+
+Board information
+=================
+
+This board was release on NuttX International Workshop 2023 and developed based on
+STM32F401RCT6 microcontroller.
+
+STM32F401RCT6 microcontroller features:
+ - Arm 32-bit Cortex®-M4 CPU with FPU
+ - 128 Kbytes of Flash memory
+ - 64 Kbytes of SRAM
+ - Serial wire debug (SWD) & JTAG interfaces
+ - Up to 81 I/O ports with interrupt capability
+ - Up to 11 communication interfaces
+ - Up to 3 I2C interfaces
+ - Up to 3 USARTs
+ - Up to 4 SPIs
+ - SDIO interface
+ - USB 2.0 full-speed device/host/OTG controller with on-chip PHY
+
+
+The board features:
+
+- Digital I2C Temperature Sensor (TMP75)
+- 2K bits (256x8) I2C EEPROM
+- On-board RS485 Transceiver
+- Two Analog Input Stages with Amplifier Buffer
+- Two Analog Output Stages with Amplifier Buffer
+- MicroSD Connector supporting 1 or 4-bit bus
+- Four User LEDs
+- Four User Buttons
+- USB for DFU (Device Firmware Update) and USB device functionality, as well as powering the board
+- Onboard voltage regulator from 5V to 3.3V
+- SWD Pins for use as STLink (Pin header) and TC2030-IDC 6-Pin Tag-Connect Plug-of-Nails™ Connector
+- Crystal for HS 8MHz
+- Crystal for RTC 32.768KHz
+
+Board documentation:
+https://github.com/lucaszampar/NuttX_STM32F4_RS485_DevBoard
+
+As F4 series have a USB DFuSe-capable BootROM [AN2606], the board can be flashed
+via `dfu-util` over USB, or via `stm32flash` over UART without any debuggers.
+
+LEDs
+====
+
+The STM32F4-RS485 has 4 software controllable LEDs.
+
+ ===== =====
+ LED PINS
+ ===== =====
+ LED_1 PC0
+ LED_2 PC1
+ LED_4 PC2
+ LED_5 PC3
+ ===== =====
+
+User Buttons
+============
+
+The STM32F4-RS485 has 4 user switches.
+
+ ======= =====
+ SWITCH PINS
+ ====== =====
+ SWIO_1 PB13
+ SWIO_2 PB14
+ SWIO_3 PB15
+ SWIO_4 PC6
+ ====== =====
+
+UARTs
+=====
+
+The STM32F4-RS485 has 1 USART available for user.
+
+USART2
+------
+
+ ========== =====
+ UART/USART PINS
+ ========== =====
+ CTS PA0
+ RTS PA1
+ TX PA2 *Warning you make need to reverse RX/TX on
+ RX PA3 some RS-232 converters
+ CK PA4
+ ========== =====
+
+
+SDCARD
+=====
+
+The STM32F4-RS485 has 1 SDCard slot connected as below:
+
+ ========== =====
+ SDIO PINS
+ ========== =====
+ SDIO_D0 PC8
+ SDIO_D1 PC9
+ SDIO_D2 PC10
+ SDIO_D3 PC11
+ SDIO_DK PC12
+ ========== =====
+
+
+EEPROM
+======
+
+The STM32F4-RS485 development board has serial EEPROM HX24LC02B, with 2k bits (256x8) and internally
+organized with 32 pages of 8 bytes each. It is connected through I2C as below:
+ ====== =====
+ I2C PINS
+ ====== =====
+ SDA PB7
+ SCL PB8
+ ====== =====
+
+
+Temperature Sensor
+==================
+
+The STM32F4-RS485 development board has a temperature sensor TMP75 (TMP75AIDR) connected through I2C as below:
+
+ ====== =====
+ I2C PINS
+ ====== =====
+ SDA PB7
+ SCL PB8
+ ====== =====
+
+
+RS485 Transceiver
+=====
+The STM32F4-RS485 development board has a half-duplex RS-485 transceiver, the BL3085B it is connected
+through USART2 as below:
+ ========== =====
+ USART2 PINS
+ ========== =====
+ USART2_RX RO
+ USART2_RTS DE, /RE
+ USART2_RX DI
+ ========== =====
+
+A/D Converter
+=====
+The STM32F4-RS485 development board has two Analog to Digital converters with Amplifier Buffer (1COS724SR)
+and connected as below:
+ ======= =====
+ PWM PINS
+ ======= =====
+ PWM_1 PB6
+ PWM_2 PA6
+ ======= =====
+
+D/C Converter
+=====
+The STM32F4-RS485 development board has two Digital to Analog converters with Amplifier Buffer (1COS724SR)
+and connected as below:
+ ======= =====
+ ADC PINS
+ ======= =====
+ ADC_1 PA0
+ ADC_2 PA4
+ ======= =====
+
+Configurations
+==============
+
+Each stm32f401rc-rs485 configuration is maintained in a sub-directory and
+can be selected as follow::
+
+ tools/configure.sh stm32f401rc-rs485:<subdir>
+
+ Where <subdir> is one of the following:
+
+
+Configuration Directories
+-------------------------
+
+nsh
+---
+
+Configures the NuttShell (nsh) located at apps/examples/nsh. This
+configuration enables a serial console on UART2.
diff --git a/Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/stm32f401rc_rs485.jpg b/Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/stm32f401rc_rs485.jpg
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