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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/spi_driver.md | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/docs/spi_driver.md b/docs/spi_driver.md index e2b5b140b7..c170bf1dfc 100644 --- a/docs/spi_driver.md +++ b/docs/spi_driver.md @@ -18,7 +18,24 @@ You may use more than one slave select pin, not just the `SS` pin. This is usefu ## ChibiOS/ARM Configuration -ARM support for this driver is not ready yet. Check back later! +You'll need to determine which pins can be used for SPI -- as an example, STM32 parts generally have multiple SPI peripherals, labeled SPI1, SPI2, SPI3 etc. + +To enable SPI, modify your board's `halconf.h` to enable SPI - both `HAL_USE_SPI` and `SPI_USE_WAIT` should be `TRUE`, and `SPI_SELECT_MODE` should be `SPI_SELECT_MODE_PAD`. +Then, modify your board's `mcuconf.h` to enable the SPI peripheral you've chosen -- in the case of using SPI2, modify `STM32_SPI_USE_SPI2` to be `TRUE`. + +As per the AVR configuration, you may select any other standard GPIO as a slave select pin, and can be supplied to `spi_start()`. + +Configuration-wise, you'll need to set up the peripheral as per your MCU's datasheet -- the defaults match the pins for a Proton-C, i.e. STM32F303. + +`config.h` override | Description | Default Value +----------------------------|---------------------------------------------------------------|-------------- +`#define SPI_DRIVER` | SPI peripheral to use - SPI1 => `SPID1`, SPI2 => `SPID2` etc. | `SPID2` +`#define SPI_SCK_PIN` | The pin to use for the SCK | `B13` +`#define SPI_SCK_PAL_MODE` | The alternate function mode for the SCK pin | `5` +`#define SPI_MOSI_PIN` | The pin to use for the MOSI | `B15` +`#define SPI_MOSI_PAL_MODE` | The alternate function mode for the MOSI pin | `5` +`#define SPI_MISO_PIN` | The pin to use for the MISO | `B14` +`#define SPI_MISO_PAL_MODE` | The alternate function mode for the MISO pin | `5` ## Functions |