rt1052 读取ad7616程序

以下是使用RT1052读取AD7616的示例程序：

#include "board.h"
#include "fsl_debug_console.h"
#include "fsl_spi.h"

#include "pin_mux.h"
#include "clock_config.h"

#define EXAMPLE_SPI_MASTER SPI4
#define EXAMPLE_SPI_MASTER_IRQ FLEXSPI_IRQn
#define EXAMPLE_SPI_MASTER_CLK_FREQ CLOCK_GetIpFreq(kCLOCK_Flexspi4)
#define EXAMPLE_SPI_SLAVE_SELECT_INDEX AD7616_SPI_CS
#define EXAMPLE_SPI_MASTER_SOURCE_CLOCK kCLOCK_Flexspi4

#define BUFFER_SIZE 8U

/*******************************************************************************
 * Variables
 ******************************************************************************/

spi_master_handle_t g_masterHandle;
spi_transfer_t g_masterXfer;

uint8_t g_masterRxData[BUFFER_SIZE] = {0};

/*******************************************************************************
 * Code
 ******************************************************************************/

int main(void)
{
    uint32_t sourceClock = 0U;
    uint32_t i = 0U;

    BOARD_InitPins();
    BOARD_BootClockRUN();
    BOARD_InitDebugConsole();

    /* attach 12 MHz clock to FLEXCOMM4 (SPI4) */
    CLOCK_AttachClk(kFRO12M_to_FLEXCOMM4);

    PRINTF("\r\nSPI board to board polling example started!\r\n");

    /* Master config */
    spi_master_config_t masterConfig;
    memset(&masterConfig, 0, sizeof(masterConfig));
    masterConfig.baudRate_Bps = 500000U;
    masterConfig.enableLoopback = false;
    masterConfig.phase = kSPI_ClockPhaseFirstEdge;
    masterConfig.polarity = kSPI_ClockPolarityActiveHigh;
    masterConfig.direction = kSPI_MsbFirst;
    masterConfig.dataMode = kSPI_8BitMode;
    masterConfig.txWatermark = kSPI_TxFifoOneHalfEmpty;
    masterConfig.rxWatermark = kSPI_RxFifoOneHalfFull;
    masterConfig.pinMode = kSPI_PinModeNormal;
    masterConfig.outputMode = kSPI_SlaveSelectAutomaticOutput;
    masterConfig.inputDelayInNanoSec = 1000U;
    masterConfig.transferDelayInNanoSec = 1000U;
    masterConfig.csHoldTimeInNanoSec = 1000U;
    masterConfig.csSetupTimeInNanoSec = 1000U;
    sourceClock = EXAMPLE_SPI_MASTER_CLK_FREQ;
    SPI_MasterInit(EXAMPLE_SPI_MASTER, &masterConfig, sourceClock);
    NVIC_SetPriority(EXAMPLE_SPI_MASTER_IRQ, 2U);

    /* Slave select */
    uint8_t slaveSelectValue = 0x01U << EXAMPLE_SPI_SLAVE_SELECT_INDEX;

    /* Init transfer structure */
    g_masterXfer.txData = NULL;
    g_masterXfer.rxData = g_masterRxData;
    g_masterXfer.dataSize = BUFFER_SIZE;
    g_masterXfer.configFlags = kSPI_FrameAssert;

    while (1)
    {
        /* Start master transfer */
        SPI_MasterTransferBlocking(EXAMPLE_SPI_MASTER, &g_masterXfer);

        /* Print master received data */
        PRINTF("Master received:\r\n");
        for (i = 0U; i < BUFFER_SIZE; i++)
        {
            PRINTF("  0x%x\r\n", g_masterRxData[i]);
        }

        /* Wait for a while */
        for (i = 0U; i < 10000000U; i++)
        {
            __asm("NOP");
        }
    }
}

此示例程序使用SPI4作为主设备，AD7616的SPI片选引脚连接到了GPIO_AD_B1_13。在主设备初始化后，使用`SPI_MasterTransferBlocking`函数进行数据传输。在接收到数据后，使用PRINTF打印数据。