STM32 SPI和TM1628通信

uint8_t TM1628_WritePro(void)

{undefined

  //SPI1->CR1 |= SPI_Direction_1Line_Tx ;

  SPI1->CR1  = 0xc3ff;

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0x00);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);          

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0x44);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);              

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0xC0);

  SPI_SendData8(SPI1,ShowValue[0]);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);         

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0xC2);

  SPI_SendData8(SPI1,ShowValue[1]);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); 

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0xC4);

  SPI_SendData8(SPI1,ShowValue[2]);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET); 

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0xC6);

  SPI_SendData8(SPI1,ShowValue[3]);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);  

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0x89);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);              

  SetSTB; 

  return 0;

}

uint8_t TM1628_ReadPro(void)

{undefined

  uint8_t KeyTemp[4] = {0};

  SPI1->CR1  = 0xc3ff;

  //SPI1->CR1  |= SPI_Direction_1Line_Tx;//

  SetSTB;

  DelayXu(5);

  ClrSTB;

  DelayXu(2);

  SPI_SendData8(SPI1,0x42);

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);

  DelayXu(5);

  SPI1->CR1  &= ~SPI_EN; 

  SPI1->CR1  &= SPI_Direction_Rx; 

  SPI1->CR1  |= SPI_EN;

  DelayXu(5);

  while((SPI1->SR&SPI_I2S_FLAG_RXNE) == RESET);

  KeyTemp[0] = SPI_ReceiveData8(SPI1);

  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);

  KeyTemp[1] = SPI_ReceiveData8(SPI1);

  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);

  KeyTemp[2] = SPI_ReceiveData8(SPI1);

  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);

  KeyTemp[3] = SPI_ReceiveData8(SPI1);

  //SPI1->CR1  |= SPI_Direction_1Line_Tx;//

  SetSTB;

  SPI1->CR1  = 0xc3ff;

  //检验按键是否有效  若接线开路则返回错误

  if(KeyTemp[1]&0xef) return 0 ;

  if(KeyTemp[2]&0xed) return 0 ;

  if(KeyTemp[3]&0xfd) return 0 ;

  if(KeyTemp[1]&0x10) KeyValue |=  BIT0 ;

  else                KeyValue &= ~BIT0 ;

  if(KeyTemp[2]&0x10) KeyValue |=  BIT1 ;

  else                KeyValue &= ~BIT1 ;

  if(KeyTemp[2]&0x02) KeyValue |=  BIT2 ;

  else                KeyValue &= ~BIT2 ;

  if(KeyTemp[3]&0x02) KeyValue |=  BIT3 ;

  else                KeyValue &= ~BIT3 ;

  return 1;

}