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Original question:

TDC1000: Ultrasonic level measurement, using TDC1000-TDC7200, measuring plastic turnover box and 6mm thickness steel plate...

TDC7200: 使用STM32的SPI读取TDC7200的值，读出来的全是0

zhiwei zheng
Prodigy 10 points
Part Number: TDC7200

使用STM32的SPI读取TDC7200的值，读出来的全是0

main.c文件中

uint8_t Q;

uint16_t W;

TDC7200_Init();

TDC7200_TIME1(&Q,&W);

OLED_Init();

OLED_ShowNum(16,16,Q,4,16,1);

OLED_ShowNum(0,32,W,4,16,1);

spi.c文件中

uint8_t MySPI_SwapByte(uint8_t ByteSend){

uint8_t i , ByteReceive = 0x00;

for(i = 0; i < 8; i++){

MySPI_W_MOSI(ByteReceive&(0x80>>i));

MySPI_W_SCK(1);

if(MySPI_R_MISO()==1){ByteReceive|=(0x80>>i);}

MySPI_W_SCK(0);

}

return ByteReceive;

}

void TDC7200_TIME1(uint8_t *q,uint16_t *w)

{

MySPI_Start();

MySPI_SwapByte(0x11);//读取时钟计数器值

*q = MySPI_SwapByte(0xFF);

*w = MySPI_SwapByte(0xFF);

*w <<= 8;

*w |= MySPI_SwapByte(0xFF);

MySPI_Stop();

}

电路图如下