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stm32f401rc-rs485: Add rs-485 support

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This commit is contained in:
Rodrigo Sim 2023-12-10 16:48:28 -03:00 committed by Xiang Xiao
parent 7b9b630073
commit 21b02f176f
8 changed files with 194 additions and 88 deletions
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111
Documentation/platforms/arm/stm32f4/boards/stm32f401rc-rs485/index.rst
View File

@ -69,31 +69,32 @@ User Buttons
The STM32F4-RS485 has 4 user switches.
======= =====
SWITCH PINS
======= =====
SWIO_1 PB13
SWIO_2 PB14
SWIO_3 PB15
SWIO_4 PC6
======= =====
======= ===== ======
SWITCH PINS LABEL
======= ===== ======
SWIO_1 PB13 SW3
SWIO_2 PB14 SW4
SWIO_3 PB15 SW5
SWIO_4 PC6 SW6[1]
======= ===== ======
[1] The switch SWIO_4 (SW6) is disabled due a conflict with PIN
PC6 when using USART6.
UARTs
=====
The STM32F4-RS485 has 1 USART available for user.
USART2
USART6
------
========== =======
UART/USART PINS
========== =======
CTS PA0
RTS PA1
TX PA2 [1]
RX PA3
CK PA4
TX PC6 [1]
RX PC7
CK PA8
========== =======
[1] Warning you make need to reverse RX/TX on some RS-232 converters
@ -174,7 +175,7 @@ USART2 PINS
========== =====
USART2_RX RO
USART2_RTS DE, /RE
SART2_RX DI
USART2_RX DI
========== =====
A/D Converter
@ -221,7 +222,7 @@ nsh
---
Configures the NuttShell (nsh) located at apps/examples/nsh. This
configuration enables a serial console on UART2.
configuration enables a serial console on USART6.
sdcard
------
@ -235,3 +236,81 @@ NSH commands::
nsh> mount -t procfs /proc
nsh> mount -t vfat /dev/mmcsd0 /mnt
modbus_slave
------------
Configures the NuttShell (nsh) and enables modbus in slave mode. This
configuration enables a serial console on USART6. The RS-485 is connected
to USART2. Follow below precedure to use modbus test aplication, you will
need a USB to RS-485 converter to connect the board to a PC via RS-485.
NuttShell configuration:
Run modbus application at NSH::
nsh> modbus -help
USAGE: modbus [-d|e|s|q|h]
Where:
-d : Disable protocol stack
-e : Enable the protocol stack
-s : Show current status
-q : Quit application
-h : Show this information
nsh> modbus -e
PC Configuration:
Download and install mbpoll aplication::
sudo apt install mbpoll
Check which TTY USB port is being used by you USB to RS-485 converter::
sudo dmesg
[99846.668209] usb 1-1.3: Product: USB Serial
[99846.676313] ch341 1-1.3:1.0: ch341-uart converter detected
[99846.677454] usb 1-1.3: ch341-uart converter now attached to ttyUSB1
Run the mbpoll as below::
mbpoll -a 10 -b 38400 -t 3 -r 1000 -c 4 /dev/ttyUSB1 -R
At PC terminal you will see the mbpoll application receiving the random values
generated by STM32F401RC-RS485 and transmitted over RS-485::
mbpoll 1.0-0 - FieldTalk(tm) Modbus(R) Master Simulator
Copyright © 2015-2019 Pascal JEAN, https://github.com/epsilonrt/mbpoll
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions; type 'mbpoll -w' for details.
Protocol configuration: Modbus RTU
Slave configuration...: address = [10]
start reference = 1000, count = 4
Communication.........: /dev/ttyUSB1, 38400-8E1
t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, input register table
-- Polling slave 10... Ctrl-C to stop)
[1000]: 58080 (-7456)
[1001]: 0
[1002]: 0
[1003]: 0
-- Polling slave 10... Ctrl-C to stop)
[1000]: 6100
[1001]: 0
[1002]: 0
[1003]: 0
-- Polling slave 10... Ctrl-C to stop)
[1000]: 51010 (-14526)
[1001]: 0
[1002]: 0
[1003]: 0
-- Polling slave 10... Ctrl-C to stop)
[1000]: 12528
[1001]: 0
[1002]: 0
[1003]: 0

2
arch/arm/include/stm32/chip.h
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@ -1587,7 +1587,7 @@
# define STM32_NDMA 2 /* DMA1-2 with 8 streams each*/
# define STM32_NSPI 3 /* SPI1-3 */
# define STM32_NI2S 2 /* I2S2-3 (multiplexed with SPI2-3) */
# define STM32_NUSART 3 /* USART1, 2 and 6 */
# define STM32_NUSART 6 /* Actually only 3: USART1, 2 and 6 */
# define STM32_NI2C 3 /* I2C1-3 */
# define STM32_NCAN 0 /* No CAN */
# if defined(CONFIG_ARCH_CHIP_STM32F401CB) || defined(CONFIG_ARCH_CHIP_STM32F401CC)

70
boards/arm/stm32/stm32f401rc-rs485/configs/modbus_slave/defconfig Normal file
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@ -0,0 +1,70 @@
#
# 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_FPU is not set
# CONFIG_MB_ASCII_ENABLED is not set
# CONFIG_MB_TCP_ENABLED is not set
# CONFIG_NSH_ARGCAT is not set
# CONFIG_NSH_CMDOPT_HEXDUMP is not set
# CONFIG_NSH_DISABLE_IFCONFIG is not set
# CONFIG_NSH_DISABLE_PS is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="stm32f401rc-rs485"
CONFIG_ARCH_BOARD_STM32F401RC_RS485=y
CONFIG_ARCH_BUTTONS=y
CONFIG_ARCH_CHIP="stm32"
CONFIG_ARCH_CHIP_STM32=y
CONFIG_ARCH_CHIP_STM32F401RC=y
CONFIG_ARCH_INTERRUPTSTACK=2048
CONFIG_ARCH_IRQBUTTONS=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARD_LOOPSPERMSEC=8499
CONFIG_BUILTIN=y
CONFIG_EXAMPLES_BUTTONS=y
CONFIG_EXAMPLES_BUTTONS_NAME0="SW3"
CONFIG_EXAMPLES_BUTTONS_NAME1="SW4"
CONFIG_EXAMPLES_BUTTONS_NAME2="SW5"
CONFIG_EXAMPLES_BUTTONS_NAME3="SW6"
CONFIG_EXAMPLES_BUTTONS_NAMES=y
CONFIG_EXAMPLES_BUTTONS_QTD=4
CONFIG_EXAMPLES_MODBUS=y
CONFIG_EXAMPLES_MODBUS_PORT=1
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
CONFIG_INPUT=y
CONFIG_INPUT_BUTTONS=y
CONFIG_INPUT_BUTTONS_LOWER=y
CONFIG_INTELHEX_BINARY=y
CONFIG_MODBUS=y
CONFIG_MODBUS_SLAVE=y
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=98304
CONFIG_RAM_START=0x20000000
CONFIG_RAW_BINARY=y
CONFIG_RR_INTERVAL=200
CONFIG_SCHED_WAITPID=y
CONFIG_SPI=y
CONFIG_START_DAY=5
CONFIG_START_MONTH=5
CONFIG_START_YEAR=2014
CONFIG_STM32_JTAG_SW_ENABLE=y
CONFIG_STM32_OTGFS=y
CONFIG_STM32_PWR=y
CONFIG_STM32_USART2=y
CONFIG_STM32_USART6=y
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_USART2_BAUD=38400
CONFIG_USART2_PARITY=2
CONFIG_USART2_RS485=y
CONFIG_USART6_SERIAL_CONSOLE=y

7
boards/arm/stm32/stm32f401rc-rs485/configs/nsh/defconfig
View File

@ -26,9 +26,8 @@ CONFIG_EXAMPLES_BUTTONS=y
CONFIG_EXAMPLES_BUTTONS_NAME0="SW3"
CONFIG_EXAMPLES_BUTTONS_NAME1="SW4"
CONFIG_EXAMPLES_BUTTONS_NAME2="SW5"
CONFIG_EXAMPLES_BUTTONS_NAME3="SW6"
CONFIG_EXAMPLES_BUTTONS_NAMES=y
CONFIG_EXAMPLES_BUTTONS_QTD=4
CONFIG_EXAMPLES_BUTTONS_QTD=3
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_INIT_ENTRYPOINT="nsh_main"
@ -54,7 +53,7 @@ CONFIG_START_YEAR=2014
CONFIG_STM32_JTAG_SW_ENABLE=y
CONFIG_STM32_OTGFS=y
CONFIG_STM32_PWR=y
CONFIG_STM32_USART2=y
CONFIG_STM32_USART6=y
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_USART2_SERIAL_CONSOLE=y
CONFIG_USART6_SERIAL_CONSOLE=y

4
boards/arm/stm32/stm32f401rc-rs485/configs/sdcard/defconfig
View File

@ -64,7 +64,7 @@ CONFIG_STM32_OTGFS=y
CONFIG_STM32_PWR=y
CONFIG_STM32_SDIO=y
CONFIG_STM32_SDIO_CARD=y
CONFIG_STM32_USART2=y
CONFIG_STM32_USART6=y
CONFIG_SYSTEM_NSH=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_USART2_SERIAL_CONSOLE=y
CONFIG_USART6_SERIAL_CONSOLE=y

56
boards/arm/stm32/stm32f401rc-rs485/include/board.h
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@ -256,48 +256,32 @@ extern "C"
/* Alternate function pin selections ****************************************/
/* USART1:
* RXD: PA10 CN9 pin 3, CN10 pin 33
* PB7 CN7 pin 21
* TXD: PA9 CN5 pin 1, CN10 pin 21
* PB6 CN5 pin 3, CN10 pin 17
/* USART2:
* RXD: PA3 CN4 pin 20
* TXD: PA2 CN4 pin 18
*/
#if 1
# define GPIO_USART1_RX GPIO_USART1_RX_1 /* PA10 */
# define GPIO_USART1_TX GPIO_USART1_TX_1 /* PA9 */
#else
# define GPIO_USART1_RX GPIO_USART1_RX_2 /* PB7 */
# define GPIO_USART1_TX GPIO_USART1_TX_2 /* PB6 */
#ifdef CONFIG_USART2_RS485
/* Lets use for RS485 */
# define GPIO_USART2_TX GPIO_USART2_TX_1 /* PA2 */
# define GPIO_USART2_RX GPIO_USART2_RX_1 /* PA3 */
/* RS485 DIR pin: PA1 */
# define GPIO_USART2_RS485_DIR (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_50MHz |\
GPIO_OUTPUT_CLEAR | GPIO_PORTA | GPIO_PIN1)
#endif
/* USART2:
* RXD: PA3 CN9 pin 1 (See SB13, 14, 62, 63). CN10 pin 37
* PD6
* TXD: PA2 CN9 pin 2(See SB13, 14, 62, 63). CN10 pin 35
* PD5
*/
#define GPIO_USART2_RX GPIO_USART2_RX_1 /* PA3 */
#define GPIO_USART2_TX GPIO_USART2_TX_1 /* PA2 */
#define GPIO_USART2_RTS GPIO_USART2_RTS_2
#define GPIO_USART2_CTS GPIO_USART2_CTS_2
/* USART6:
* RXD: PC7 CN5 pin2, CN10 pin 19
* PA12 CN10, pin 12
* TXD: PC6 CN10, pin 4
* PA11 CN10, pin 14
* RXD: PC7 CN2 pin 15
* TXD: PC6 CN2 pin 17
*/
#define GPIO_USART6_RX GPIO_USART6_RX_1 /* PC7 */
#define GPIO_USART6_TX GPIO_USART6_TX_1 /* PC6 */
/* UART RX DMA configurations */
#define DMAMAP_USART1_RX DMAMAP_USART1_RX_2
#define DMAMAP_USART6_RX DMAMAP_USART6_RX_2
/* I2C
*
* The optional _GPIO configurations allow the I2C driver to manually
@ -379,20 +363,18 @@ extern "C"
#define LED_PANIC 1
/* Buttons
* The STM32F401RC-RS485 has 4 user buttons: SW3, SW4, SW5 and
* SW6. They are connected to PB13, PB14, PB15 and PC6 respectively.
* The STM32F401RC-RS485 has 3 user buttons: SW3, SW4, and SW5.
* They are connected to PB13, PB14, and PB15 respectively.
*/
#define BUTTON_SW3 0
#define BUTTON_SW4 1
#define BUTTON_SW5 2
#define BUTTON_SW6 3
#define NUM_BUTTONS 4
#define NUM_BUTTONS 3
#define BUTTON_SW3_BIT (1 << BUTTON_SW3)
#define BUTTON_SW4_BIT (1 << BUTTON_SW4)
#define BUTTON_SW5_BIT (1 << BUTTON_SW5)
#define BUTTON_SW6_BIT (1 << BUTTON_SW6)
#define GPIO_TIM2_CH1IN (GPIO_TIM2_CH1IN_1 | GPIO_PULLUP)
#define GPIO_TIM2_CH2IN (GPIO_TIM2_CH2IN_1 | GPIO_PULLUP)

2
boards/arm/stm32/stm32f401rc-rs485/src/stm32_buttons.c
View File

@ -46,7 +46,7 @@
static const uint32_t g_buttons[NUM_BUTTONS] =
{
GPIO_BTN_SW3, GPIO_BTN_SW4, GPIO_BTN_SW5, GPIO_BTN_SW6
GPIO_BTN_SW3, GPIO_BTN_SW4, GPIO_BTN_SW5
};
/****************************************************************************

30
boards/arm/stm32/stm32f401rc-rs485/src/stm32f401rc-rs485.h
View File

@ -75,16 +75,15 @@
GPIO_SPEED_50MHz)
/* Buttons
* The STM32F401RC-RS485 has 4 user buttons.
* The STM32F401RC-RS485 has 3 user buttons.
* - SW3 is connected to the GPIO PB13.
* - SW4 is connected to the GPIO PB14.
* - SW5 is connected to the GPIO PB15.
* - SW6 is connected to the GPIO PC6.
*/
#define MIN_IRQBUTTON BUTTON_SW3
#define MAX_IRQBUTTON BUTTON_SW6
#define NUM_IRQBUTTONS 4
#define MAX_IRQBUTTON BUTTON_SW5
#define NUM_IRQBUTTONS 3
#define GPIO_BTN_SW3 \
(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN13)
@ -92,29 +91,6 @@
(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN14)
#define GPIO_BTN_SW5 \
(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN15)
#define GPIO_BTN_SW6 \
(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTC | GPIO_PIN6)
/* The shield uses the following pins:
*
* +5V
* GND
* SERIAL_TX=PA_2 USER_BUTTON=PC_13
* SERIAL_RX=PA_3 LD2=PA_5
*
* Analog Digital
* A0=PA_0 USART2RX D0=PA_3 D8 =PA_9
* A1=PA_1 USART2TX D1=PA_2 D9 =PC_7
* A2=PA_4 D2=PA_10 WIFI_CS=D10=PB_6 SPI_CS
* A3=PB_0 WIFI_INT=D3=PB_3 D11=PA_7 SPI_MOSI
* A4=PC_1 SD_CS=D4=PB_5 D12=PA_6 SPI_MISO
* A5=PC_0 WIFI_EN=D5=PB_4 LD2=D13=PA_5 SPI_SCK
* LED2=D6=PB_10 I2C1_SDA=D14=PB_9 WIFI Probe
* D7=PA_8 I2C1_SCL=D15=PB_8 WIFI Probe
*
* mostly from: https://mbed.org/platforms/ST-Nucleo-F401RE/
*
*/
/* SPI1 off */