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 ) ; }