diff options
| author | Stefan Kerkmann <karlk90@pm.me> | 2022-06-30 13:19:27 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-06-30 13:19:27 +0200 |
| commit | d7173967087e022d20d1f9c812b1b668e9d3f71b (patch) | |
| tree | 68198271dd5125193795c399c6478ead0a71b09f /platforms/chibios/drivers/spi_master.c | |
| parent | d206c1791e5858323cff0664f39f95edc1381ac5 (diff) | |
[Core] Add Raspberry Pi RP2040 support (#14877)
* Disable RESET keycode because of naming conflicts
* Add Pico SDK as submodule
* Add RP2040 build support to QMK
* Adjust USB endpoint structs for RP2040
* Add RP2040 bootloader and double-tap reset routine
* Add generic and pro micro RP2040 boards
* Add RP2040 onekey keyboard
* Add WS2812 PIO DMA enabled driver and documentation
Supports regular and open-drain output configuration. RP2040 GPIOs are
sadly not 5V tolerant, so this is a bit use-less or needs extra hardware
or you take the risk to fry your hardware.
* Adjust SIO Driver for RP2040
* Adjust I2C Driver for RP2040
* Adjust SPI Driver for RP2040
* Add PIO serial driver and documentation
* Add general RP2040 documentation
* Apply suggestions from code review
Co-authored-by: Nick Brassel <nick@tzarc.org>
Co-authored-by: Nick Brassel <nick@tzarc.org>
Diffstat (limited to 'platforms/chibios/drivers/spi_master.c')
| -rw-r--r-- | platforms/chibios/drivers/spi_master.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/platforms/chibios/drivers/spi_master.c b/platforms/chibios/drivers/spi_master.c index ce69e7f0ac..f9974d9f6b 100644 --- a/platforms/chibios/drivers/spi_master.c +++ b/platforms/chibios/drivers/spi_master.c @@ -20,7 +20,7 @@ static pin_t currentSlavePin = NO_PIN; -#if defined(K20x) || defined(KL2x) +#if defined(K20x) || defined(KL2x) || defined(RP2040) static SPIConfig spiConfig = {NULL, 0, 0, 0}; #else static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0}; @@ -167,7 +167,36 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { spiConfig.SPI_CPOL = SPI_CPOL_High; break; } +#elif defined(MCU_RP) + if (lsbFirst) { + osalDbgAssert(lsbFirst == false, "RP2040s PrimeCell SPI implementation does not support sending LSB first."); + } + + // Motorola frame format and 8bit transfer data size. + spiConfig.SSPCR0 = SPI_SSPCR0_FRF_MOTOROLA | SPI_SSPCR0_DSS_8BIT; + // Serial output clock = (ck_sys or ck_peri) / (SSPCPSR->CPSDVSR * (1 + + // SSPCR0->SCR)). SCR is always set to zero, as QMK SPI API expects the + // passed divisor to be the only value to divide the input clock by. + spiConfig.SSPCPSR = roundedDivisor; // Even number from 2 to 254 + switch (mode) { + case 0: + spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPO; // Clock polarity: low + spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPH; // Clock phase: sample on first edge + break; + case 1: + spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPO; // Clock polarity: low + spiConfig.SSPCR0 |= SPI_SSPCR0_SPH; // Clock phase: sample on second edge transition + break; + case 2: + spiConfig.SSPCR0 |= SPI_SSPCR0_SPO; // Clock polarity: high + spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPH; // Clock phase: sample on first edge + break; + case 3: + spiConfig.SSPCR0 |= SPI_SSPCR0_SPO; // Clock polarity: high + spiConfig.SSPCR0 |= SPI_SSPCR0_SPH; // Clock phase: sample on second edge transition + break; + } #else spiConfig.cr1 = 0; |