fsfw-hal/stm32h7/devicetest/GyroL3GD20H.cpp

#include "GyroL3GD20H.h"
#include "spiConf.h"
#include "../spi/mspInit.h"
#include "../spi/spiDefinitions.h"
#include "../spi/spiCore.h"

#include "fsfw/tasks/TaskFactory.h"
#include "fsfw/serviceinterface/ServiceInterface.h"

#include "stm32h7xx_nucleo.h"
#include "stm32h7xx_hal_spi.h"
#include "stm32h7xx_hal_rcc.h"

std::array<uint8_t, GyroL3GD20H::recvBufferSize> GyroL3GD20H::rxBuffer;
TransferStates transferState = TransferStates::IDLE;
DMA_HandleTypeDef txDmaHandle;
DMA_HandleTypeDef rxDmaHandle;

GyroL3GD20H::GyroL3GD20H(SPI_HandleTypeDef *spiHandle): spiHandle(spiHandle) {
    set_dma_handles(&txDmaHandle, &rxDmaHandle);
    set_spi_msp_functions(&hal_spi_msp_init_dma, spiHandle, &hal_spi_msp_deinit_dma, spiHandle);
    GPIO_InitTypeDef chipSelect = {};
    __HAL_RCC_GPIOD_CLK_ENABLE();
    chipSelect.Pin = GPIO_PIN_14;
    chipSelect.Mode = GPIO_MODE_OUTPUT_PP;
    HAL_GPIO_Init(GPIOD, &chipSelect);
    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_SET);
}

ReturnValue_t GyroL3GD20H::initialize() {
    // Configure the SPI peripheral
    spiHandle->Instance               = SPI1;
    spiHandle->Init.BaudRatePrescaler = spi::getPrescaler(HAL_RCC_GetHCLKFreq(), 3900000);
    spiHandle->Init.Direction         = SPI_DIRECTION_2LINES;
    spi::assignSpiMode(spi::SpiModes::MODE_3, spiHandle);
    spiHandle->Init.DataSize          = SPI_DATASIZE_8BIT;
    spiHandle->Init.FirstBit          = SPI_FIRSTBIT_MSB;
    spiHandle->Init.TIMode            = SPI_TIMODE_DISABLE;
    spiHandle->Init.CRCCalculation    = SPI_CRCCALCULATION_DISABLE;
    spiHandle->Init.CRCPolynomial     = 7;
    spiHandle->Init.CRCLength         = SPI_CRC_LENGTH_8BIT;
    spiHandle->Init.NSS               = SPI_NSS_SOFT;
    spiHandle->Init.NSSPMode          = SPI_NSS_PULSE_DISABLE;
    // Recommended setting to avoid glitches
    spiHandle->Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_ENABLE;
    spiHandle->Init.Mode = SPI_MODE_MASTER;
    if(HAL_SPI_Init(spiHandle) != HAL_OK) {
        sif::printWarning("Error initializing SPI\n");
        return HasReturnvaluesIF::RETURN_FAILED;
    }
    return HasReturnvaluesIF::RETURN_OK;
}

ReturnValue_t GyroL3GD20H::performOperation() {

    transferState = TransferStates::WAIT;

    const uint8_t WHO_AM_I_REG = 0b00001111;
    const uint8_t STM_READ_MASK = 0b10000000;
    const uint8_t EXPECTED_WHO_AM_I_VAL = 0b11010111;

    sif::printInfo("GyroL3GD20H::performOperation: Reading WHO AM I register\n");

    txBuffer[0] = WHO_AM_I_REG | STM_READ_MASK;
    txBuffer[1] = 0;

    // Start SPI transfer via DMA
    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_RESET);
    if(HAL_SPI_TransmitReceive_DMA(spiHandle, txBuffer.data(), rxBuffer.data(), 2) != HAL_OK) {
        // Transfer error in transmission process
        sif::printWarning("Error transmitting SPI with DMA\n");
    }

    // Wait for the transfer to complete
    while (transferState == TransferStates::WAIT) {
        //TaskFactory::delayTask(1);
    }

    // Invalidate cache prior to access by CPU
    SCB_InvalidateDCache_by_Addr ((uint32_t *)rxBuffer.data(), recvBufferSize);

    switch(transferState) {
    case(TransferStates::SUCCESS): {
        sif::printInfo("Transfer success\n");
        uint8_t whoAmIVal = rxBuffer[1];
        if(whoAmIVal != EXPECTED_WHO_AM_I_VAL) {
            sif::printDebug("GyroL3GD20H::performOperation: "
                    "Read WHO AM I value %d not equal to expected value!\n", whoAmIVal);
        }
        transferState = TransferStates::IDLE;
        break;
    }
    case(TransferStates::FAILURE): {
        sif::printWarning("Transfer failure\n");
        transferState = TransferStates::FAILURE;
        break;
    }
    default: {
        break;
    }
    }
    return HasReturnvaluesIF::RETURN_OK;
}

/**
 * @brief  TxRx Transfer completed callback.
 * @param  hspi: SPI handle
 * @note   This example shows a simple way to report end of DMA TxRx transfer, and
 *         you can add your own implementation.
 * @retval None
 */
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi) {
    transferState = TransferStates::SUCCESS;
    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_SET);
}

/**
 * @brief  SPI error callbacks.
 * @param  hspi: SPI handle
 * @note   This example shows a simple way to report transfer error, and you can
 *         add your own implementation.
 * @retval None
 */
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi) {
    transferState = TransferStates::FAILURE;
}