diff options
Diffstat (limited to 'platforms/chibios/drivers/spi_master.c')
-rw-r--r-- | platforms/chibios/drivers/spi_master.c | 155 |
1 files changed, 117 insertions, 38 deletions
diff --git a/platforms/chibios/drivers/spi_master.c b/platforms/chibios/drivers/spi_master.c index fcdbc9ecf0..6417b7077f 100644 --- a/platforms/chibios/drivers/spi_master.c +++ b/platforms/chibios/drivers/spi_master.c @@ -19,13 +19,33 @@ #include "timer.h" static bool spiStarted = false; - #if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE -static pin_t currentSlavePin; +static pin_t current_slave_pin = NO_PIN; +static bool current_cs_active_low = true; #endif static SPIConfig spiConfig; +static inline void spi_select(void) { + spiSelect(&SPI_DRIVER); + +#if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE + if (current_slave_pin != NO_PIN) { + gpio_write_pin(current_slave_pin, current_cs_active_low ? 0 : 1); + } +#endif +} + +static inline void spi_unselect(void) { +#if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE + if (current_slave_pin != NO_PIN) { + gpio_write_pin(current_slave_pin, current_cs_active_low ? 1 : 0); + } +#endif + + spiUnselect(&SPI_DRIVER); +} + __attribute__((weak)) void spi_init(void) { static bool is_initialised = false; if (!is_initialised) { @@ -63,7 +83,7 @@ __attribute__((weak)) void spi_init(void) { } } -bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { +bool spi_start_extended(spi_start_config_t *start_config) { #if (SPI_USE_MUTUAL_EXCLUSION == TRUE) spiAcquireBus(&SPI_DRIVER); #endif // (SPI_USE_MUTUAL_EXCLUSION == TRUE) @@ -71,32 +91,37 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { if (spiStarted) { return false; } - #if SPI_SELECT_MODE != SPI_SELECT_MODE_NONE - if (slavePin == NO_PIN) { + if (start_config->slave_pin == NO_PIN) { return false; } #endif #if !(defined(WB32F3G71xx) || defined(WB32FQ95xx)) uint16_t roundedDivisor = 2; - while (roundedDivisor < divisor) { + while (roundedDivisor < start_config->divisor) { roundedDivisor <<= 1; } +# if defined(AT32F415) + if (roundedDivisor < 2 || roundedDivisor > 1024) { + return false; + } +# else if (roundedDivisor < 2 || roundedDivisor > 256) { return false; } +# endif #endif #if defined(K20x) || defined(KL2x) spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1); - if (lsbFirst) { + if (start_config->lsb_first) { spiConfig.tar0 |= SPIx_CTARn_LSBFE; } - switch (mode) { + switch (start_config->mode) { case 0: break; case 1: @@ -141,11 +166,11 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { spiConfig.cr0 = SPI_CR0_SELOEN; spiConfig.cr1 = SPI_CR1_MODE | 8; // 8 bits and in master mode - if (lsbFirst) { + if (start_config->lsb_first) { spiConfig.cr1 |= SPI_CR1_FIRSTBIT; } - switch (mode) { + switch (start_config->mode) { case 0: spiConfig.cr1 |= SPI_CR1_FORMAT_MODE0; break; @@ -163,17 +188,17 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { spiConfig.cpr = (roundedDivisor - 1) >> 1; #elif defined(WB32F3G71xx) || defined(WB32FQ95xx) - if (!lsbFirst) { - osalDbgAssert(lsbFirst != FALSE, "unsupported lsbFirst"); + if (!start_config->lsb_first) { + osalDbgAssert(start_config->lsb_first != FALSE, "unsupported lsb_first"); } - if (divisor < 1) { + if (start_config->divisor < 1) { return false; } - spiConfig.SPI_BaudRatePrescaler = (divisor << 2); + spiConfig.SPI_BaudRatePrescaler = (start_config->divisor << 2); - switch (mode) { + switch (start_config->mode) { case 0: spiConfig.SPI_CPHA = SPI_CPHA_1Edge; spiConfig.SPI_CPOL = SPI_CPOL_Low; @@ -192,8 +217,8 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { break; } #elif defined(MCU_RP) - if (lsbFirst) { - osalDbgAssert(lsbFirst == false, "RP2040s PrimeCell SPI implementation does not support sending LSB first."); + if (start_config->lsb_first) { + osalDbgAssert(start_config->lsb_first == false, "RP2040s PrimeCell SPI implementation does not support sending LSB first."); } // Motorola frame format and 8bit transfer data size. @@ -203,7 +228,7 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { // passed divisor to be the only value to divide the input clock by. spiConfig.SSPCPSR = roundedDivisor; // Even number from 2 to 254 - switch (mode) { + switch (start_config->mode) { case 0: spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPO; // Clock polarity: low spiConfig.SSPCR0 &= ~SPI_SSPCR0_SPH; // Clock phase: sample on first edge @@ -221,14 +246,67 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { spiConfig.SSPCR0 |= SPI_SSPCR0_SPH; // Clock phase: sample on second edge transition break; } +#elif defined(AT32F415) + spiConfig.ctrl1 = 0; + + if (lsbFirst) { + spiConfig.ctrl1 |= SPI_CTRL1_LTF; + } + + switch (mode) { + case 0: + break; + case 1: + spiConfig.ctrl1 |= SPI_CTRL1_CLKPHA; + break; + case 2: + spiConfig.ctrl1 |= SPI_CTRL1_CLKPOL; + break; + case 3: + spiConfig.ctrl1 |= SPI_CTRL1_CLKPHA | SPI_CTRL1_CLKPOL; + break; + } + + switch (roundedDivisor) { + case 2: + break; + case 4: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_0; + break; + case 8: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_1; + break; + case 16: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_1 | SPI_CTRL1_MDIV_0; + break; + case 32: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_2; + break; + case 64: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_2 | SPI_CTRL1_MDIV_0; + break; + case 128: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_2 | SPI_CTRL1_MDIV_1; + break; + case 256: + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_2 | SPI_CTRL1_MDIV_1 | SPI_CTRL1_MDIV_0; + break; + case 512: + spiConfig.ctrl2 |= SPI_CTRL1_MDIV_3; + break; + case 1024: + spiConfig.ctrl2 |= SPI_CTRL1_MDIV_3; + spiConfig.ctrl1 |= SPI_CTRL1_MDIV_0; + break; + } #else spiConfig.cr1 = 0; - if (lsbFirst) { + if (start_config->lsb_first) { spiConfig.cr1 |= SPI_CR1_LSBFIRST; } - switch (mode) { + switch (start_config->mode) { case 0: break; case 1: @@ -271,31 +349,37 @@ bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { spiStarted = true; #if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE - currentSlavePin = slavePin; + current_slave_pin = start_config->slave_pin; + current_cs_active_low = start_config->cs_active_low; #endif #if SPI_SELECT_MODE == SPI_SELECT_MODE_PAD - spiConfig.ssport = PAL_PORT(slavePin); - spiConfig.sspad = PAL_PAD(slavePin); - gpio_set_pin_output(slavePin); + spiConfig.ssport = PAL_PORT(start_config->slave_pin); + spiConfig.sspad = PAL_PAD(start_config->slave_pin); + gpio_set_pin_output(start_config->slave_pin); #elif SPI_SELECT_MODE == SPI_SELECT_MODE_NONE - if (slavePin != NO_PIN) { - gpio_set_pin_output(slavePin); + if (start_config->slave_pin != NO_PIN) { + gpio_set_pin_output(start_config->slave_pin); } #else # error "Unsupported SPI_SELECT_MODE" #endif spiStart(&SPI_DRIVER, &spiConfig); - spiSelect(&SPI_DRIVER); -#if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE - if (slavePin != NO_PIN) { - gpio_write_pin_low(slavePin); - } -#endif + spi_select(); return true; } +bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { + spi_start_config_t start_config = {0}; + start_config.slave_pin = slavePin; + start_config.lsb_first = lsbFirst; + start_config.mode = mode; + start_config.divisor = divisor; + start_config.cs_active_low = true; + return spi_start_extended(&start_config); +} + spi_status_t spi_write(uint8_t data) { uint8_t rxData; spiExchange(&SPI_DRIVER, 1, &data, &rxData); @@ -322,12 +406,7 @@ spi_status_t spi_receive(uint8_t *data, uint16_t length) { void spi_stop(void) { if (spiStarted) { -#if SPI_SELECT_MODE == SPI_SELECT_MODE_NONE - if (currentSlavePin != NO_PIN) { - gpio_write_pin_high(currentSlavePin); - } -#endif - spiUnselect(&SPI_DRIVER); + spi_unselect(); spiStop(&SPI_DRIVER); spiStarted = false; } |