diff options
Diffstat (limited to 'drivers/chibios/spi_master.c')
| -rw-r--r-- | drivers/chibios/spi_master.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/drivers/chibios/spi_master.c b/drivers/chibios/spi_master.c deleted file mode 100644 index 28ddcbb2ba..0000000000 --- a/drivers/chibios/spi_master.c +++ /dev/null @@ -1,202 +0,0 @@ -/* Copyright 2020 Nick Brassel (tzarc) - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <https://www.gnu.org/licenses/>. - */ - -#include "spi_master.h" - -#include "timer.h" - -static pin_t currentSlavePin = NO_PIN; - -#if defined(K20x) || defined(KL2x) -static SPIConfig spiConfig = {NULL, 0, 0, 0}; -#else -static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0}; -#endif - -__attribute__((weak)) void spi_init(void) { - static bool is_initialised = false; - if (!is_initialised) { - is_initialised = true; - - // Try releasing special pins for a short time - setPinInput(SPI_SCK_PIN); - setPinInput(SPI_MOSI_PIN); - setPinInput(SPI_MISO_PIN); - - chThdSleepMilliseconds(10); -#if defined(USE_GPIOV1) - palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), SPI_SCK_PAL_MODE); - palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), SPI_MOSI_PAL_MODE); - palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), SPI_MISO_PAL_MODE); -#else - palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_ALTERNATE(SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST); - palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_ALTERNATE(SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST); - palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_ALTERNATE(SPI_MISO_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST); -#endif - } -} - -bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) { - if (currentSlavePin != NO_PIN || slavePin == NO_PIN) { - return false; - } - - uint16_t roundedDivisor = 2; - while (roundedDivisor < divisor) { - roundedDivisor <<= 1; - } - - if (roundedDivisor < 2 || roundedDivisor > 256) { - return false; - } - -#if defined(K20x) || defined(KL2x) - spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1); - - if (lsbFirst) { - spiConfig.tar0 |= SPIx_CTARn_LSBFE; - } - - switch (mode) { - case 0: - break; - case 1: - spiConfig.tar0 |= SPIx_CTARn_CPHA; - break; - case 2: - spiConfig.tar0 |= SPIx_CTARn_CPOL; - break; - case 3: - spiConfig.tar0 |= SPIx_CTARn_CPHA | SPIx_CTARn_CPOL; - break; - } - - switch (roundedDivisor) { - case 2: - spiConfig.tar0 |= SPIx_CTARn_BR(0); - break; - case 4: - spiConfig.tar0 |= SPIx_CTARn_BR(1); - break; - case 8: - spiConfig.tar0 |= SPIx_CTARn_BR(3); - break; - case 16: - spiConfig.tar0 |= SPIx_CTARn_BR(4); - break; - case 32: - spiConfig.tar0 |= SPIx_CTARn_BR(5); - break; - case 64: - spiConfig.tar0 |= SPIx_CTARn_BR(6); - break; - case 128: - spiConfig.tar0 |= SPIx_CTARn_BR(7); - break; - case 256: - spiConfig.tar0 |= SPIx_CTARn_BR(8); - break; - } -#else - spiConfig.cr1 = 0; - - if (lsbFirst) { - spiConfig.cr1 |= SPI_CR1_LSBFIRST; - } - - switch (mode) { - case 0: - break; - case 1: - spiConfig.cr1 |= SPI_CR1_CPHA; - break; - case 2: - spiConfig.cr1 |= SPI_CR1_CPOL; - break; - case 3: - spiConfig.cr1 |= SPI_CR1_CPHA | SPI_CR1_CPOL; - break; - } - - switch (roundedDivisor) { - case 2: - break; - case 4: - spiConfig.cr1 |= SPI_CR1_BR_0; - break; - case 8: - spiConfig.cr1 |= SPI_CR1_BR_1; - break; - case 16: - spiConfig.cr1 |= SPI_CR1_BR_1 | SPI_CR1_BR_0; - break; - case 32: - spiConfig.cr1 |= SPI_CR1_BR_2; - break; - case 64: - spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_0; - break; - case 128: - spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1; - break; - case 256: - spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0; - break; - } -#endif - - currentSlavePin = slavePin; - spiConfig.ssport = PAL_PORT(slavePin); - spiConfig.sspad = PAL_PAD(slavePin); - - setPinOutput(slavePin); - spiStart(&SPI_DRIVER, &spiConfig); - spiSelect(&SPI_DRIVER); - - return true; -} - -spi_status_t spi_write(uint8_t data) { - uint8_t rxData; - spiExchange(&SPI_DRIVER, 1, &data, &rxData); - - return rxData; -} - -spi_status_t spi_read(void) { - uint8_t data = 0; - spiReceive(&SPI_DRIVER, 1, &data); - - return data; -} - -spi_status_t spi_transmit(const uint8_t *data, uint16_t length) { - spiSend(&SPI_DRIVER, length, data); - return SPI_STATUS_SUCCESS; -} - -spi_status_t spi_receive(uint8_t *data, uint16_t length) { - spiReceive(&SPI_DRIVER, length, data); - return SPI_STATUS_SUCCESS; -} - -void spi_stop(void) { - if (currentSlavePin != NO_PIN) { - spiUnselect(&SPI_DRIVER); - spiStop(&SPI_DRIVER); - currentSlavePin = NO_PIN; - } -} |