stm32f401rc-rs485: Add rs-485 support
This commit is contained in:
Rodrigo Sim
Xiang Xiao
parent
7b9b630073
commit
21b02f176f
@ -69,31 +69,32 @@ User Buttons
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The STM32F4-RS485 has 4 user switches.
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======= =====
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SWITCH PINS
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======= =====
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SWIO_1 PB13
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SWIO_2 PB14
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SWIO_3 PB15
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SWIO_4 PC6
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======= =====
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======= ===== ======
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SWITCH PINS LABEL
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======= ===== ======
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SWIO_1 PB13 SW3
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SWIO_2 PB14 SW4
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SWIO_3 PB15 SW5
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SWIO_4 PC6 SW6[1]
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======= ===== ======
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[1] The switch SWIO_4 (SW6) is disabled due a conflict with PIN
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PC6 when using USART6.
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UARTs
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=====
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The STM32F4-RS485 has 1 USART available for user.
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USART2
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USART6
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------
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========== =======
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UART/USART PINS
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========== =======
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CTS PA0
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RTS PA1
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TX PA2 [1]
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RX PA3
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CK PA4
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TX PC6 [1]
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RX PC7
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CK PA8
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========== =======
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[1] Warning you make need to reverse RX/TX on some RS-232 converters
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@ -174,7 +175,7 @@ USART2 PINS
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========== =====
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USART2_RX RO
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USART2_RTS DE, /RE
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SART2_RX DI
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USART2_RX DI
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========== =====
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A/D Converter
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@ -221,7 +222,7 @@ nsh
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---
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Configures the NuttShell (nsh) located at apps/examples/nsh. This
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configuration enables a serial console on UART2.
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configuration enables a serial console on USART6.
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sdcard
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------
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@ -235,3 +236,81 @@ NSH commands::
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nsh> mount -t procfs /proc
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nsh> mount -t vfat /dev/mmcsd0 /mnt
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modbus_slave
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------------
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Configures the NuttShell (nsh) and enables modbus in slave mode. This
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configuration enables a serial console on USART6. The RS-485 is connected
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to USART2. Follow below precedure to use modbus test aplication, you will
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need a USB to RS-485 converter to connect the board to a PC via RS-485.
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NuttShell configuration:
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Run modbus application at NSH::
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nsh> modbus -help
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USAGE: modbus [-d|e|s|q|h]
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Where:
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-d : Disable protocol stack
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-e : Enable the protocol stack
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-s : Show current status
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-q : Quit application
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-h : Show this information
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nsh> modbus -e
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PC Configuration:
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Download and install mbpoll aplication::
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sudo apt install mbpoll
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Check which TTY USB port is being used by you USB to RS-485 converter::
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sudo dmesg
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[99846.668209] usb 1-1.3: Product: USB Serial
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[99846.676313] ch341 1-1.3:1.0: ch341-uart converter detected
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[99846.677454] usb 1-1.3: ch341-uart converter now attached to ttyUSB1
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Run the mbpoll as below::
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mbpoll -a 10 -b 38400 -t 3 -r 1000 -c 4 /dev/ttyUSB1 -R
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At PC terminal you will see the mbpoll application receiving the random values
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generated by STM32F401RC-RS485 and transmitted over RS-485::
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mbpoll 1.0-0 - FieldTalk(tm) Modbus(R) Master Simulator
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Copyright © 2015-2019 Pascal JEAN, https://github.com/epsilonrt/mbpoll
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This program comes with ABSOLUTELY NO WARRANTY.
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This is free software, and you are welcome to redistribute it
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under certain conditions; type 'mbpoll -w' for details.
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Protocol configuration: Modbus RTU
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Slave configuration...: address = [10]
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start reference = 1000, count = 4
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Communication.........: /dev/ttyUSB1, 38400-8E1
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t/o 1.00 s, poll rate 1000 ms
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Data type.............: 16-bit register, input register table
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-- Polling slave 10... Ctrl-C to stop)
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[1000]: 58080 (-7456)
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[1001]: 0
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[1002]: 0
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[1003]: 0
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-- Polling slave 10... Ctrl-C to stop)
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[1000]: 6100
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[1001]: 0
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[1002]: 0
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[1003]: 0
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-- Polling slave 10... Ctrl-C to stop)
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[1000]: 51010 (-14526)
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[1001]: 0
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[1002]: 0
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[1003]: 0
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-- Polling slave 10... Ctrl-C to stop)
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[1000]: 12528
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[1001]: 0
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[1002]: 0
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[1003]: 0
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@ -1587,7 +1587,7 @@
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# define STM32_NDMA 2 /* DMA1-2 with 8 streams each*/
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# define STM32_NSPI 3 /* SPI1-3 */
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# define STM32_NI2S 2 /* I2S2-3 (multiplexed with SPI2-3) */
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# define STM32_NUSART 3 /* USART1, 2 and 6 */
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# define STM32_NUSART 6 /* Actually only 3: USART1, 2 and 6 */
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# define STM32_NI2C 3 /* I2C1-3 */
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# define STM32_NCAN 0 /* No CAN */
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# if defined(CONFIG_ARCH_CHIP_STM32F401CB) || defined(CONFIG_ARCH_CHIP_STM32F401CC)
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@ -0,0 +1,70 @@
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#
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# This file is autogenerated: PLEASE DO NOT EDIT IT.
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#
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# You can use "make menuconfig" to make any modifications to the installed .config file.
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# You can then do "make savedefconfig" to generate a new defconfig file that includes your
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# modifications.
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#
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# CONFIG_ARCH_FPU is not set
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# CONFIG_MB_ASCII_ENABLED is not set
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# CONFIG_MB_TCP_ENABLED is not set
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# CONFIG_NSH_ARGCAT is not set
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# CONFIG_NSH_CMDOPT_HEXDUMP is not set
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# CONFIG_NSH_DISABLE_IFCONFIG is not set
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# CONFIG_NSH_DISABLE_PS is not set
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CONFIG_ARCH="arm"
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CONFIG_ARCH_BOARD="stm32f401rc-rs485"
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CONFIG_ARCH_BOARD_STM32F401RC_RS485=y
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CONFIG_ARCH_BUTTONS=y
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CONFIG_ARCH_CHIP="stm32"
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CONFIG_ARCH_CHIP_STM32=y
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CONFIG_ARCH_CHIP_STM32F401RC=y
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CONFIG_ARCH_INTERRUPTSTACK=2048
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CONFIG_ARCH_IRQBUTTONS=y
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CONFIG_ARCH_STACKDUMP=y
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CONFIG_BOARD_LOOPSPERMSEC=8499
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CONFIG_BUILTIN=y
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CONFIG_EXAMPLES_BUTTONS=y
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CONFIG_EXAMPLES_BUTTONS_NAME0="SW3"
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CONFIG_EXAMPLES_BUTTONS_NAME1="SW4"
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CONFIG_EXAMPLES_BUTTONS_NAME2="SW5"
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CONFIG_EXAMPLES_BUTTONS_NAME3="SW6"
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CONFIG_EXAMPLES_BUTTONS_NAMES=y
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CONFIG_EXAMPLES_BUTTONS_QTD=4
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CONFIG_EXAMPLES_MODBUS=y
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CONFIG_EXAMPLES_MODBUS_PORT=1
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CONFIG_HAVE_CXX=y
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CONFIG_HAVE_CXXINITIALIZE=y
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CONFIG_INIT_ENTRYPOINT="nsh_main"
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CONFIG_INPUT=y
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CONFIG_INPUT_BUTTONS=y
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CONFIG_INPUT_BUTTONS_LOWER=y
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CONFIG_INTELHEX_BINARY=y
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CONFIG_MODBUS=y
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CONFIG_MODBUS_SLAVE=y
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CONFIG_NSH_ARCHINIT=y
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CONFIG_NSH_BUILTIN_APPS=y
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CONFIG_NSH_FILEIOSIZE=512
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CONFIG_NSH_LINELEN=64
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CONFIG_NSH_READLINE=y
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CONFIG_PREALLOC_TIMERS=4
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CONFIG_RAM_SIZE=98304
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CONFIG_RAM_START=0x20000000
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CONFIG_RAW_BINARY=y
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CONFIG_RR_INTERVAL=200
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CONFIG_SCHED_WAITPID=y
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CONFIG_SPI=y
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CONFIG_START_DAY=5
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CONFIG_START_MONTH=5
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CONFIG_START_YEAR=2014
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CONFIG_STM32_JTAG_SW_ENABLE=y
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CONFIG_STM32_OTGFS=y
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CONFIG_STM32_PWR=y
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CONFIG_STM32_USART2=y
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CONFIG_STM32_USART6=y
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CONFIG_SYSTEM_NSH=y
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CONFIG_TASK_NAME_SIZE=0
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CONFIG_USART2_BAUD=38400
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CONFIG_USART2_PARITY=2
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CONFIG_USART2_RS485=y
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CONFIG_USART6_SERIAL_CONSOLE=y
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@ -26,9 +26,8 @@ CONFIG_EXAMPLES_BUTTONS=y
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CONFIG_EXAMPLES_BUTTONS_NAME0="SW3"
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CONFIG_EXAMPLES_BUTTONS_NAME1="SW4"
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CONFIG_EXAMPLES_BUTTONS_NAME2="SW5"
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CONFIG_EXAMPLES_BUTTONS_NAME3="SW6"
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CONFIG_EXAMPLES_BUTTONS_NAMES=y
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CONFIG_EXAMPLES_BUTTONS_QTD=4
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CONFIG_EXAMPLES_BUTTONS_QTD=3
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CONFIG_HAVE_CXX=y
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CONFIG_HAVE_CXXINITIALIZE=y
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CONFIG_INIT_ENTRYPOINT="nsh_main"
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@ -54,7 +53,7 @@ CONFIG_START_YEAR=2014
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CONFIG_STM32_JTAG_SW_ENABLE=y
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CONFIG_STM32_OTGFS=y
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CONFIG_STM32_PWR=y
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CONFIG_STM32_USART2=y
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CONFIG_STM32_USART6=y
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CONFIG_SYSTEM_NSH=y
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CONFIG_TASK_NAME_SIZE=0
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CONFIG_USART2_SERIAL_CONSOLE=y
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CONFIG_USART6_SERIAL_CONSOLE=y
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@ -64,7 +64,7 @@ CONFIG_STM32_OTGFS=y
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CONFIG_STM32_PWR=y
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CONFIG_STM32_SDIO=y
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CONFIG_STM32_SDIO_CARD=y
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CONFIG_STM32_USART2=y
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CONFIG_STM32_USART6=y
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CONFIG_SYSTEM_NSH=y
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CONFIG_TASK_NAME_SIZE=0
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CONFIG_USART2_SERIAL_CONSOLE=y
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CONFIG_USART6_SERIAL_CONSOLE=y
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@ -256,48 +256,32 @@ extern "C"
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/* Alternate function pin selections ****************************************/
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/* USART1:
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* RXD: PA10 CN9 pin 3, CN10 pin 33
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* PB7 CN7 pin 21
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* TXD: PA9 CN5 pin 1, CN10 pin 21
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* PB6 CN5 pin 3, CN10 pin 17
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/* USART2:
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* RXD: PA3 CN4 pin 20
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* TXD: PA2 CN4 pin 18
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*/
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#if 1
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# define GPIO_USART1_RX GPIO_USART1_RX_1 /* PA10 */
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# define GPIO_USART1_TX GPIO_USART1_TX_1 /* PA9 */
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#else
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# define GPIO_USART1_RX GPIO_USART1_RX_2 /* PB7 */
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# define GPIO_USART1_TX GPIO_USART1_TX_2 /* PB6 */
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#ifdef CONFIG_USART2_RS485
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/* Lets use for RS485 */
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# define GPIO_USART2_TX GPIO_USART2_TX_1 /* PA2 */
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# define GPIO_USART2_RX GPIO_USART2_RX_1 /* PA3 */
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/* RS485 DIR pin: PA1 */
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# define GPIO_USART2_RS485_DIR (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_50MHz |\
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GPIO_OUTPUT_CLEAR | GPIO_PORTA | GPIO_PIN1)
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#endif
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/* USART2:
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* RXD: PA3 CN9 pin 1 (See SB13, 14, 62, 63). CN10 pin 37
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* PD6
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* TXD: PA2 CN9 pin 2(See SB13, 14, 62, 63). CN10 pin 35
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* PD5
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*/
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#define GPIO_USART2_RX GPIO_USART2_RX_1 /* PA3 */
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#define GPIO_USART2_TX GPIO_USART2_TX_1 /* PA2 */
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#define GPIO_USART2_RTS GPIO_USART2_RTS_2
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#define GPIO_USART2_CTS GPIO_USART2_CTS_2
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/* USART6:
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* RXD: PC7 CN5 pin2, CN10 pin 19
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* PA12 CN10, pin 12
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* TXD: PC6 CN10, pin 4
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* PA11 CN10, pin 14
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* RXD: PC7 CN2 pin 15
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* TXD: PC6 CN2 pin 17
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*/
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#define GPIO_USART6_RX GPIO_USART6_RX_1 /* PC7 */
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#define GPIO_USART6_TX GPIO_USART6_TX_1 /* PC6 */
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/* UART RX DMA configurations */
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#define DMAMAP_USART1_RX DMAMAP_USART1_RX_2
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#define DMAMAP_USART6_RX DMAMAP_USART6_RX_2
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/* I2C
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*
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* The optional _GPIO configurations allow the I2C driver to manually
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@ -379,20 +363,18 @@ extern "C"
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#define LED_PANIC 1
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/* Buttons
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* The STM32F401RC-RS485 has 4 user buttons: SW3, SW4, SW5 and
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* SW6. They are connected to PB13, PB14, PB15 and PC6 respectively.
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* The STM32F401RC-RS485 has 3 user buttons: SW3, SW4, and SW5.
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* They are connected to PB13, PB14, and PB15 respectively.
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*/
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#define BUTTON_SW3 0
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#define BUTTON_SW4 1
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#define BUTTON_SW5 2
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#define BUTTON_SW6 3
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#define NUM_BUTTONS 4
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#define NUM_BUTTONS 3
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#define BUTTON_SW3_BIT (1 << BUTTON_SW3)
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#define BUTTON_SW4_BIT (1 << BUTTON_SW4)
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#define BUTTON_SW5_BIT (1 << BUTTON_SW5)
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#define BUTTON_SW6_BIT (1 << BUTTON_SW6)
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#define GPIO_TIM2_CH1IN (GPIO_TIM2_CH1IN_1 | GPIO_PULLUP)
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#define GPIO_TIM2_CH2IN (GPIO_TIM2_CH2IN_1 | GPIO_PULLUP)
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@ -46,7 +46,7 @@
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static const uint32_t g_buttons[NUM_BUTTONS] =
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{
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GPIO_BTN_SW3, GPIO_BTN_SW4, GPIO_BTN_SW5, GPIO_BTN_SW6
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GPIO_BTN_SW3, GPIO_BTN_SW4, GPIO_BTN_SW5
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};
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/****************************************************************************
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@ -75,16 +75,15 @@
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GPIO_SPEED_50MHz)
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/* Buttons
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* The STM32F401RC-RS485 has 4 user buttons.
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* The STM32F401RC-RS485 has 3 user buttons.
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* - SW3 is connected to the GPIO PB13.
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* - SW4 is connected to the GPIO PB14.
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* - SW5 is connected to the GPIO PB15.
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* - SW6 is connected to the GPIO PC6.
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*/
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#define MIN_IRQBUTTON BUTTON_SW3
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#define MAX_IRQBUTTON BUTTON_SW6
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#define NUM_IRQBUTTONS 4
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#define MAX_IRQBUTTON BUTTON_SW5
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#define NUM_IRQBUTTONS 3
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#define GPIO_BTN_SW3 \
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(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN13)
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@ -92,29 +91,6 @@
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(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN14)
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#define GPIO_BTN_SW5 \
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(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTB | GPIO_PIN15)
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#define GPIO_BTN_SW6 \
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(GPIO_INPUT |GPIO_FLOAT |GPIO_EXTI | GPIO_PORTC | GPIO_PIN6)
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/* The shield uses the following pins:
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*
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* +5V
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* GND
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* SERIAL_TX=PA_2 USER_BUTTON=PC_13
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* SERIAL_RX=PA_3 LD2=PA_5
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*
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* Analog Digital
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* A0=PA_0 USART2RX D0=PA_3 D8 =PA_9
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* A1=PA_1 USART2TX D1=PA_2 D9 =PC_7
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* A2=PA_4 D2=PA_10 WIFI_CS=D10=PB_6 SPI_CS
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* A3=PB_0 WIFI_INT=D3=PB_3 D11=PA_7 SPI_MOSI
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* A4=PC_1 SD_CS=D4=PB_5 D12=PA_6 SPI_MISO
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* A5=PC_0 WIFI_EN=D5=PB_4 LD2=D13=PA_5 SPI_SCK
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* LED2=D6=PB_10 I2C1_SDA=D14=PB_9 WIFI Probe
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* D7=PA_8 I2C1_SCL=D15=PB_8 WIFI Probe
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*
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* mostly from: https://mbed.org/platforms/ST-Nucleo-F401RE/
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*
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*/
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/* SPI1 off */
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