This driver powers the Split Keyboard feature.
?> Serial in this context should be read as sending information one bit at a time, rather than implementing UART/USART/RS485/RS232 standards.
All drivers in this category have the following characteristics:
Provides data and signaling over a single conductor
Limited to single master, single slave
Default driver, the absence of configuration assumes this driver. To configure it, add this to your rules.mk:
SERIAL_DRIVER = bitbang
Configure the driver via your config.h:
#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6#define SELECT_SOFT_SERIAL_SPEED 1 // or 0, 2, 3, 4, 5// 0: about 189kbps (Experimental only)// 1: about 137kbps (default)// 2: about 75kbps// 3: about 39kbps// 4: about 26kbps// 5: about 20kbps
!> The bitbang driver causes connection issues with bitbang WS2812 driver
Along with the generic options above, you must also turn on the
PAL_USE_CALLBACKS feature in your halconf.h.
Targeting STM32 boards where communication is offloaded to a USART hardware device. The advantage is that this provides fast and accurate timings.
SOFT_SERIAL_PIN for this driver is the configured USART TX pin. The TX pin must have appropriate pull-up resistors. To configure it, add this to your rules.mk:
SERIAL_DRIVER = usart
Configure the hardware via your config.h:
#define SOFT_SERIAL_PIN B6 // USART TX pin#define SELECT_SOFT_SERIAL_SPEED 1 // or 0, 2, 3, 4, 5// 0: about 460800 baud// 1: about 230400 baud (default)// 2: about 115200 baud// 3: about 57600 baud// 4: about 38400 baud// 5: about 19200 baud#define SERIAL_USART_DRIVER SD1 // USART driver of TX pin. default: SD1#define SERIAL_USART_TX_PAL_MODE 7 // Pin "alternate function", see the respective datasheet for the appropriate values for your MCU. default: 7#define SERIAL_USART_TIMEOUT 100 // USART driver timeout. default 100
You must also enable the ChibiOS
In your board's halconf.h:
#define HAL_USE_SERIAL TRUE
In your board's mcuconf.h:
#define STM32_SERIAL_USE_USARTn TRUE (where 'n' matches the peripheral number of your selected USART on the MCU)
Do note that the configuration required is for the
SERIAL peripheral, not the