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Diffstat (limited to 'docs/serial_driver.md')
| -rw-r--r-- | docs/serial_driver.md | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/docs/serial_driver.md b/docs/serial_driver.md index 359fc59551..3e89deffad 100644 --- a/docs/serial_driver.md +++ b/docs/serial_driver.md @@ -63,7 +63,7 @@ Configure the hardware via your config.h: // 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 +#define SERIAL_USART_TIMEOUT 20 // USART driver timeout. default 20 ``` You must also enable the ChibiOS `SERIAL` feature: @@ -73,7 +73,7 @@ You must also enable the ChibiOS `SERIAL` feature: Do note that the configuration required is for the `SERIAL` peripheral, not the `UART` peripheral. ### USART Full-duplex -Targeting STM32 boards where communication is offloaded to a USART hardware device. The advantage over bitbang is that this provides fast and accurate timings. USART Full-Duplex requires two conductors **without** pull-up resistors instead of one conductor with a pull-up resistor unlike the Half-duplex driver, but it is more efficent as it uses DMA transfers, which can result in even faster transmission speeds. +Targeting STM32 boards where communication is offloaded to a USART hardware device. The advantage over bitbang is that this provides fast and accurate timings. USART Full-Duplex requires two conductors **without** pull-up resistors instead of one conductor with a pull-up resistor unlike the Half-duplex driver. Due to its internal design it is more efficent, which can result in even faster transmission speeds. #### Pin configuration @@ -86,12 +86,13 @@ Please note that `TX` of the master half has to be connected with the `RX` pin o To use the driver, add this to your rules.mk: ```make -SERIAL_DRIVER = usart_duplex +SERIAL_DRIVER = usart ``` Next configure the hardware via your config.h: ```c +#define SERIAL_USART_FULL_DUPLEX // Enable full duplex operation mode. #define SERIAL_USART_TX_PIN B6 // USART TX pin #define SERIAL_USART_RX_PIN B7 // USART RX pin //#define USART1_REMAP // Remap USART TX and RX pins on STM32F103 MCUs, see table below. @@ -104,17 +105,17 @@ Next configure the hardware via your config.h: // 3: 57600 baud // 4: 38400 baud // 5: 19200 baud -#define SERIAL_USART_DRIVER UARTD1 // USART driver of TX and RX pin. default: UARTD1 +#define SERIAL_USART_DRIVER SD1 // USART driver of TX and RX 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_RX_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 +#define SERIAL_USART_TIMEOUT 20 // USART driver timeout. default 20 ``` -You must also enable the ChibiOS `UART` with blocking api feature: -* In your board's halconf.h: `#define HAL_USE_UART TRUE` and `#define UART_USE_WAIT TRUE` -* In your board's mcuconf.h: `#define STM32_UART_USE_USARTn TRUE` (where 'n' matches the peripheral number of your selected USART on the MCU) +You must also enable the ChibiOS `SERIAL` feature: +* 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 `UART` peripheral, not the `SERIAL` peripheral. +Do note that the configuration required is for the `SERIAL` peripheral, not the `UART` peripheral. #### Pins for USART Peripherals with Alternate Functions for selected STM32 MCUs |