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標(biāo)題: 關(guān)于AD7193的驅(qū)動(dòng) stm8s單片機(jī)SPI代碼編寫問(wèn)題 [打印本頁(yè)]

作者: tyx623521553 時(shí)間: 2019-10-10 16:59
標(biāo)題: 關(guān)于AD7193的驅(qū)動(dòng) stm8s單片機(jī)SPI代碼編寫問(wèn)題
下了官方的驅(qū)動(dòng)，但是spi初始化以及讀取自己寫的，出現(xiàn)了問(wèn)題，關(guān)于spi不太懂他的步驟看一下我哪里寫錯(cuò)了？

unsigned char SPI_Read7193(unsigned char slaveDeviceId,
                     unsigned char* data,
                     unsigned char bytesNumber)
{
  unsigned char byte = 0;
  if(slaveDeviceId == AD7193_SLAVE_ID)PMOD1_CS_LOW;

  for(byte = 0; byte < bytesNumber; byte++)
  {
while(SPI_GetFlagStatus(SPI_FLAG_RXNE) == RESET);
*data++ = SPI_ReceiveData();

  }
  if(slaveDeviceId == AD7193_SLAVE_ID)PMOD1_CS_HIGH;

  return bytesNumber;
}

unsigned char SPI_Write7193(unsigned char slaveDeviceId,
                     unsigned char* data,
                     unsigned char bytesNumber)
{
  unsigned char byte = 0;
  if(slaveDeviceId == AD7193_SLAVE_ID)PMOD1_CS_LOW;

  for(byte = 0; byte < bytesNumber; byte++)
  {
while(SPI_GetFlagStatus(SPI_FLAG_TXE) == RESET);
SPI_SendData(*data++);

  }
  if(slaveDeviceId == AD7193_SLAVE_ID)PMOD1_CS_HIGH;

  return bytesNumber;
}

這個(gè)是官方給的別的單片機(jī)的例子，我不太了解這個(gè)單片機(jī)和寄存器，你們可以參考一下

unsigned char SPI_Read(unsigned char slaveDeviceId,
                     unsigned char* data,
                     unsigned char bytesNumber)
{
unsigned char byte = 0;

if(slaveDeviceId == 1)
{
      PMOD1_CS_LOW;
}
if(slaveDeviceId == 2)
{
      ST7579_CS_LOW;
}
for(byte = 0; byte < bytesNumber; byte++)
{
      SIO10 = data[byte];
      __no_operation();
      __no_operation();
      while(SSR02 & 0x0040);
      data[byte] = SIO10;
}
if(slaveDeviceId == 1)
{
      PMOD1_CS_HIGH;
}
if(slaveDeviceId == 2)
{
      ST7579_CS_HIGH;
}

return bytesNumber;
}

/***************************************************************************//**
* @brief Writes data to SPI.
*
* @param slaveDeviceId - The ID of the selected slave device.
* @param data - Data represents the write buffer.
* @param bytesNumber - Number of bytes to write.
*
* @return Number of written bytes.
*******************************************************************************/
unsigned char SPI_Write(unsigned char slaveDeviceId,
                     unsigned char* data,
                     unsigned char bytesNumber)
{
unsigned char byte = 0;
unsigned char read = 0;

if(slaveDeviceId == 1)
{
      PMOD1_CS_LOW;
}
if(slaveDeviceId == 2)
{
      ST7579_CS_LOW;       // Assert CS low
}
for(byte = 0; byte < bytesNumber; byte++)
{
      SIO10 = data[byte];
      __no_operation();
      __no_operation();
      while(SSR02 & 0x0040);
      read = SIO10;
}
if(slaveDeviceId == 1)
{
      PMOD1_CS_HIGH;
}
if(slaveDeviceId == 2)
{
      ST7579_CS_HIGH;       // Assert CS high
}

return bytesNumber;
}

作者: f556 時(shí)間: 2019-10-11 09:23
同系列的SPI都會(huì)不同，如MSP430的F149 與F2553程序差異大，你問(wèn)題又沒說(shuō)清，沒人能幫你

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