MSPM0G3507应用之ADC数据通过SPI接口进行传输

例程位于官方SDK下面，如下图所示：

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#include "ti_msp_dl_config.h"



/* Commands to handle through SPI */

#define SAMPLE_ADC (0x01)

#define SEND_RESULTS (0x02)

#define SAMPLE_SEND_RESULTS (0x03)



/* Data for SPI to receive */

volatile uint8_t gCommand = 0x0;

volatile bool gNextCommand = false;



/* ADC variables */

volatile bool gCheckADC;

uint16_t gADCResult;

uint16_t startADCProcess(void);



int main(void)

{

    SYSCFG_DL_init();



    NVIC_ClearPendingIRQ(SPI_0_INST_INT_IRQN);

    NVIC_EnableIRQ(SPI_0_INST_INT_IRQN);

    NVIC_EnableIRQ(ADC12_0_INST_INT_IRQN);



    /*

     * Process the SPI command received.

     * The commands available are sample adc, send adc result, sample and send adc result.

     */

    while (1) {



        while(gNextCommand == false)

            __WFI();

        gNextCommand = false;



        switch(gCommand){

            case SAMPLE_ADC:

                gADCResult = startADCProcess();

                break;

            case SEND_RESULTS:

                DL_SPI_transmitDataBlocking16(SPI_0_INST, gADCResult);

                break;

            case SAMPLE_SEND_RESULTS:

                gADCResult = startADCProcess();

                DL_SPI_transmitDataBlocking16(SPI_0_INST, gADCResult);

                break;

            default:

                break;

        }



    }

}



/* This function is used to enable and start the conversion, then output the result. */ 

uint16_t startADCProcess(){



    uint16_t adcResult = 0;



    DL_ADC12_enableConversions(ADC12_0_INST);

    delay_cycles(4);

    DL_ADC12_startConversion(ADC12_0_INST);



    while(gCheckADC == false)

    {

        __WFI();

    }



    adcResult = DL_ADC12_getMemResult(ADC12_0_INST, DL_ADC12_MEM_IDX_0);



    return adcResult;

}



void SPI_0_INST_IRQHandler(void)

{

    switch (DL_SPI_getPendingInterrupt(SPI_0_INST)) {

        case DL_SPI_IIDX_RX:

            gCommand = DL_SPI_receiveDataBlocking16(SPI_0_INST);

            /* Toggle the LED after data reception */

            DL_GPIO_togglePins(GPIO_LEDS_PORT, GPIO_LEDS_USER_LED_1_PIN);

            gNextCommand = true;

            break;

        default:

            break;

    }

}



void ADC12_0_INST_IRQHandler(void) {

  switch (DL_ADC12_getPendingInterrupt(ADC12_0_INST)) {

  case DL_ADC12_IIDX_MEM0_RESULT_LOADED:

    gCheckADC = true;

    break;

  default:

    break;

  }

}