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ads1299讀取連續數據

user5121970
Intellectual 455 points
Other Parts Discussed in Thread: ADS1299

我利用MSP432P401R與ADS1299進行溝通，我利用SPI讀取ADS1299連續數據，MSP432P401R為master，ADS1299為slave，在此之前我已成功利用MSP432P401R寫入和讀取暫存器，並且都成功，但是讀取連續數據卻有很大的問題。
以下為我目前遇到的幾個問題整理：
1.如果要讀取測試方波，並且我只需要使用一個通道，請問我的所有暫存器之值是否設定正確，通道1為內部測試訊號方波，其餘通道均無訊號。
2.讀取連續數據時，master是否需要連續傳送虛擬位元0x00至slave。
3.讀去連續數據時，每一個DRDY之間都會輸出一個stat+8個通道值，因為我只使用到1個通道，我要如何讓通道1的值和其餘通道分開。


4.我測試過讓通道1與其他通道值皆為0x61  Input shorted (for offset or noise measurements)，但結果顯示我的SPI好像沒有作用，無法接收到連續傳輸的數據，理論上應該所有數值皆為0，但結果卻有數值。
以下為我目前的程式碼

#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>
#define HZ  3000000UL
/* Statics */
static volatile uint8_t RXData = 0;
static uint8_t TXData = 0;
int i = 0;
int a = 0;
int z = 0;
int j = 0;
//#define A[500];
uint8_t A;
uint32_t B[1000];
//uint8_t A[500];

uint8_t hibyte,midbyte,lowbyte;
uint32_t intQA;

//![Simple SPI Config]
/* SPI Master Configuration Parameter */
const eUSCI_SPI_MasterConfig spiMasterConfig =
{
        EUSCI_B_SPI_CLOCKSOURCE_SMCLK,             // SMCLK Clock Source
        3000000,                                   // SMCLK = DCO = 3MHZ
        500000,                                    // *** = 500khz
        EUSCI_B_SPI_MSB_FIRST,                     // MSB First
        EUSCI_B_SPI_PHASE_DATA_CAPTURED_ONFIRST_CHANGED_ON_NEXT,    // Phase
        EUSCI_B_SPI_CLOCKPOLARITY_INACTIVITY_LOW, // LOW polarity
        EUSCI_B_SPI_3PIN                           // 3Wire SPI Mode
};
//![Simple SPI Config]

int main(void)
{
    /* Halting WDT  */
    WDT_A_holdTimer();

    //![Simple SPI Example]
    /* Selecting P1.5 P1.6 and P1.7 in SPI mode */
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
            GPIO_PIN5 | GPIO_PIN6 | GPIO_PIN7, GPIO_PRIMARY_MODULE_FUNCTION);

    /* Configuring SPI in 3wire master mode */
    SPI_initMaster(EUSCI_B0_BASE, &spiMasterConfig);

    /* Enable SPI module */
    SPI_enableModule(EUSCI_B0_BASE);

    /* Enabling interrupts */
    //SPI_enableInterrupt(EUSCI_B0_BASE, EUSCI_B_SPI_RECEIVE_INTERRUPT);
    //Interrupt_enableInterrupt(INT_EUSCIB0);
    //Interrupt_enableSleepOnIsrExit();


    //初始化ADS1299

    P3->DIR |= BIT0;
    P3->OUT ^= BIT0; //CS_Low
    __delay_cycles(HZ);
    P3->DIR |= BIT5;
    P3->OUT =  BIT5;       //CLKSEL High
    __delay_cycles(HZ/1000);

    P5->DIR |= BIT1;
    P5->OUT =  BIT1;       //PWDN High
    __delay_cycles(HZ);


    P2->DIR |= BIT7;
    P2->OUT = BIT7;      //RESET High
    __delay_cycles(HZ);


    P2->DIR |= BIT7;
    P2->OUT ^= BIT7;      //RESET LOW
    __delay_cycles(HZ);

    P2->DIR |= BIT7;
    P2->OUT = BIT7;      //RESET High
    __delay_cycles(HZ);
    ///////////////////////////////////////////////////

    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x11);  //SDATAC


    //CONFIG3
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x43);  //CONFIG3
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);  //CONFIG3
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0xE0);  //CONFIG3

    //CONFIG1
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x41);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x96);//採樣率250


    //CONFIG2
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x42);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0xD0);

    //Channel1
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x45);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x65);
    //SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel2
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x46);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel3
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x47);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel4
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x48);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel5
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x49);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel6
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x4A);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel7
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x4B);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);

    //Channel8
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x4C);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x00);
    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x61);


    P2->DIR |= BIT6;
    P2->OUT |= BIT6;    //Set Start High

    while (!(SPI_getInterruptStatus(EUSCI_B0_BASE,EUSCI_B_SPI_TRANSMIT_INTERRUPT)));
    SPI_transmitData(EUSCI_B0_BASE, 0x10);  //RDATAC


    for(i;i<1000;i++)
    {
        int32_t outputcode = adc_read_data();
        B[a] = outputcode;
        a++;
    }
    //PCM_gotoLPM0();
    //__no_operation();
}

uint8_t read_continue_data(){
    SPI_transmitData(EUSCI_B0_BASE, 0x00); //傳送虛擬位元0x00
    A = SPI_receiveData(EUSCI_B0_BASE); //將接收到的資料存進A陣列
    //return read_continue_data;
   // return 0;
}

uint32_t adc_read_data(void)
{
    uint8_t adcCode[3];


    adcCode[0] = read_continue_data();
    adcCode[1] = read_continue_data();
    adcCode[2] = read_continue_data();

    return ((int32_t)(((adcCode[0] & 0x80) ? (0x00) : (0xFF))   ) << 24) |
                                             ((adcCode[0] & 0xFF) << 16) |
                                             ((adcCode[1] & 0xFF) << 8 ) |
                                             ((adcCode[2] & 0xFF) << 0 ) ;
}