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| author | Marius Petcu <marius@petcu.me> | 2025-02-22 00:24:23 +0200 |
|---|---|---|
| committer | KevinOConnor <kevin@koconnor.net> | 2025-03-07 17:52:46 -0500 |
| commit | 3e7efe5ef1468bf221c47bcd72624878f021fdae (patch) | |
| tree | f41bd33e99b5244e90bb86e5332ef406bb90de11 | |
| parent | 75a10bfcafc0655e36e5ecf01c3f2033a14ef2c7 (diff) | |
| download | kutter-3e7efe5ef1468bf221c47bcd72624878f021fdae.tar.gz kutter-3e7efe5ef1468bf221c47bcd72624878f021fdae.tar.xz kutter-3e7efe5ef1468bf221c47bcd72624878f021fdae.zip | |
stm32: Add support for USART6 on STM32F401
STM32F401 has USART6 on PA12/PA11 and PC7/PC6 with alternate
function mapping AF08. This can be used, for example, to connect
to the Elegoo Neptune 3, where PA12/PA11 are wired to an RJ10 plug
going to the stock screen.
Signed-off-by: Marius Petcu <marius@petcu.me>
| -rw-r--r-- | src/stm32/Kconfig | 6 | ||||
| -rw-r--r-- | src/stm32/serial.c | 24 |
2 files changed, 28 insertions, 2 deletions
diff --git a/src/stm32/Kconfig b/src/stm32/Kconfig index 6e1daa54..fad15bb0 100644 --- a/src/stm32/Kconfig +++ b/src/stm32/Kconfig @@ -434,6 +434,12 @@ choice bool "Serial (on USART5 PD2/PD3)" if LOW_LEVEL_OPTIONS depends on MACH_STM32G0Bx select SERIAL + config STM32_SERIAL_USART6 + bool "Serial (on USART6 PA12/PA11)" if LOW_LEVEL_OPTIONS && MACH_STM32F401 + select SERIAL + config STM32_SERIAL_USART6_ALT_PC7_PC6 + bool "Serial (on USART6 PC7/PC6)" if LOW_LEVEL_OPTIONS && MACH_STM32F401 + select SERIAL config STM32_CANBUS_PA11_PA12 bool "CAN bus (on PA11/PA12)" depends on HAVE_STM32_CANBUS || HAVE_STM32_FDCANBUS diff --git a/src/stm32/serial.c b/src/stm32/serial.c index 19aa048e..b78b5afb 100644 --- a/src/stm32/serial.c +++ b/src/stm32/serial.c @@ -16,38 +16,58 @@ DECL_CONSTANT_STR("RESERVE_PINS_serial", "PA10,PA9"); #define GPIO_Rx GPIO('A', 10) #define GPIO_Tx GPIO('A', 9) + #define GPIO_AF_MODE 7 #define USARTx USART1 #define USARTx_IRQn USART1_IRQn #elif CONFIG_STM32_SERIAL_USART1_ALT_PB7_PB6 DECL_CONSTANT_STR("RESERVE_PINS_serial", "PB7,PB6"); #define GPIO_Rx GPIO('B', 7) #define GPIO_Tx GPIO('B', 6) + #define GPIO_AF_MODE 7 #define USARTx USART1 #define USARTx_IRQn USART1_IRQn #elif CONFIG_STM32_SERIAL_USART2 DECL_CONSTANT_STR("RESERVE_PINS_serial", "PA3,PA2"); #define GPIO_Rx GPIO('A', 3) #define GPIO_Tx GPIO('A', 2) + #define GPIO_AF_MODE 7 #define USARTx USART2 #define USARTx_IRQn USART2_IRQn #elif CONFIG_STM32_SERIAL_USART2_ALT_PD6_PD5 DECL_CONSTANT_STR("RESERVE_PINS_serial", "PD6,PD5"); #define GPIO_Rx GPIO('D', 6) #define GPIO_Tx GPIO('D', 5) + #define GPIO_AF_MODE 7 #define USARTx USART2 #define USARTx_IRQn USART2_IRQn #elif CONFIG_STM32_SERIAL_USART3 DECL_CONSTANT_STR("RESERVE_PINS_serial", "PB11,PB10"); #define GPIO_Rx GPIO('B', 11) #define GPIO_Tx GPIO('B', 10) + #define GPIO_AF_MODE 7 #define USARTx USART3 #define USARTx_IRQn USART3_IRQn #elif CONFIG_STM32_SERIAL_USART3_ALT_PD9_PD8 DECL_CONSTANT_STR("RESERVE_PINS_serial", "PD9,PD8"); #define GPIO_Rx GPIO('D', 9) #define GPIO_Tx GPIO('D', 8) + #define GPIO_AF_MODE 7 #define USARTx USART3 #define USARTx_IRQn USART3_IRQn +#elif CONFIG_STM32_SERIAL_USART6 + DECL_CONSTANT_STR("RESERVE_PINS_serial", "PA12,PA11"); + #define GPIO_Rx GPIO('A', 12) + #define GPIO_Tx GPIO('A', 11) + #define GPIO_AF_MODE 8 + #define USARTx USART6 + #define USARTx_IRQn USART6_IRQn +#elif CONFIG_STM32_SERIAL_USART6_ALT_PC7_PC6 + DECL_CONSTANT_STR("RESERVE_PINS_serial", "PC7,PC6"); + #define GPIO_Rx GPIO('C', 7) + #define GPIO_Tx GPIO('C', 6) + #define GPIO_AF_MODE 8 + #define USARTx USART6 + #define USARTx_IRQn USART6_IRQn #endif #define CR1_FLAGS (USART_CR1_UE | USART_CR1_RE | USART_CR1_TE \ @@ -90,7 +110,7 @@ serial_init(void) USARTx->CR1 = CR1_FLAGS; armcm_enable_irq(USARTx_IRQHandler, USARTx_IRQn, 0); - gpio_peripheral(GPIO_Rx, GPIO_FUNCTION(7), 1); - gpio_peripheral(GPIO_Tx, GPIO_FUNCTION(7), 0); + gpio_peripheral(GPIO_Rx, GPIO_FUNCTION(GPIO_AF_MODE), 1); + gpio_peripheral(GPIO_Tx, GPIO_FUNCTION(GPIO_AF_MODE), 0); } DECL_INIT(serial_init); |