stm8s单片机 SPI驱动一直卡住调不出来求助 -

标题: stm8s单片机 SPI驱动一直卡住调不出来求助 [打印本页]

作者: tyx623521553 时间: 2019-10-14 17:45
标题: stm8s单片机 SPI驱动一直卡住调不出来求助
以下是我的AD7193 spi主机模式驱动（stm8s）
一直停在RDY口，就是MISO复用，一直不拉低，死循环
我怀疑是spi读写没写好，还有就是spi硬件调试的时候，gpio口需要设置嘛？
求看一看，找出原因

#define MISO_STATE          GPIO_ReadInputPin(GPIOC, GPIO_PIN_7)

#define PMOD1_CS_LOW          GPIO_WriteLow(GPIOE, GPIO_PIN_5)

#define PMOD1_CS_HIGH       GPIO_WriteHigh(GPIOE, GPIO_PIN_5)

unsigned char SPI_Init7193(unsigned char lsbFirst, unsigned long clockFreq, unsigned char clockPol, unsigned char clockEdg)
{
  SPI_DeInit();
  SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_16, SPI_MODE_MASTER, SPI_CLOCKPOLARITY_HIGH, SPI_CLOCKPHASE_1EDGE, SPI_DATADIRECTION_2LINES_FULLDUPLEX, SPI_NSS_SOFT, 0x07);
  SPI_Cmd(ENABLE);

  GPIO_Init(GPIOE, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST);    //SPI CS/NSS
  GPIO_WriteLow(GPIOE, GPIO_PIN_5);

  return 1;
}

unsigned char SPI_Write7193(unsigned char slaveDeviceId, unsigned char* data, unsigned char n)
{
unsigned char byte = 0;
unsigned char read = 0;

for(byte = 0;byte < n;byte++)
{
   while(SPI_SR_TXE==0);
   SPI_SendData(data[byte]);
   while(SPI_SR_RXNE==0);
   read = SPI_ReceiveData();
}

return n;
}

unsigned char SPI_Read7193(unsigned char slaveDeviceId, unsigned char* data, unsigned char n)
{
unsigned char byte = 0;

for(byte = 0;byte < n;byte++)
{
   while(SPI_SR_TXE==0);
   SPI_SendData(data[byte]);
   while(SPI_SR_RXNE==0);
   data[byte] = SPI_ReceiveData();
}

return n;
}

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