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boards/nucleo-f302r8: add rs485 support #16035

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merged 1 commit into from
Mar 24, 2025
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boards/nucleo-f302r8: add rs485 support #16035

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4 changes: 4 additions & 0 deletions boards/arm/stm32/nucleo-f302r8/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,10 @@ config NUCLEOF302R8_HIGHPRI
bool "High priority interrupt test"
default n

config NUCLEOF302R8_RS485_WAVESHARE
bool "Map USART1 pins to match RS485 CAN Waveshare shield"
default n

if SENSORS_QENCODER

config NUCLEO_F302R8_QETIMER
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27 changes: 24 additions & 3 deletions boards/arm/stm32/nucleo-f302r8/include/board.h
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Original file line number Diff line number Diff line change
Expand Up @@ -206,10 +206,31 @@
#define GPIO_USART2_RX GPIO_USART2_RX_2 /* PA3 */
#define GPIO_USART2_TX GPIO_USART2_TX_2 /* PA2 */

/* USART1 */
/* USART1
*
* At default use:
* USART1_RX - PB7
* USART1_TX - PB6
*
* If CONFIG_NUCLEOF302R8_RS485_WAVESHARE=y use configuration to match RS485
* shield from Waveshare:
*
* USART1_RX - PA10
* USART1_TX - PA9
* RS485_DIR - PA8 (arduino D7)
*
*/

#define GPIO_USART1_RX GPIO_USART1_RX_2 /* PB7 */
#define GPIO_USART1_TX GPIO_USART1_TX_2 /* PB6 */
#ifdef CONFIG_NUCLEOF302R8_RS485_WAVESHARE
# define GPIO_USART1_RX GPIO_USART1_RX_1 /* PA10 */
# define GPIO_USART1_TX GPIO_USART1_TX_1 /* PA9 */
# define GPIO_USART1_RS485_DIR (GPIO_OUTPUT | GPIO_PUSHPULL | \
GPIO_SPEED_50MHz | GPIO_OUTPUT_CLEAR | \
GPIO_PORTA | GPIO_PIN8)
#else
# define GPIO_USART1_RX GPIO_USART1_RX_2 /* PB7 */
# define GPIO_USART1_TX GPIO_USART1_TX_2 /* PB6 */
#endif

/* CAN */

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