IIC 驱动无法使用

[songzhishuo]

测试了下IIC 的驱动，并无法使用，只能发送Addr 后面的buf数据无法发送出来

[deividAlfa]

This is expected. You cannot send data to i2c devices without sending the address first.
This works for me:

ErrorStatus I2C1_MasterTransmit(uint8_t DevAddress, uint8_t *pData, uint16_t Size)
{
  ErrorStatus status = SUCCESS;
  LL_I2C_DisableBitPOS(I2C1);                                                           // Master mode                      

  LL_I2C_GenerateStartCondition(I2C1);                                                  // Send start
  while(LL_I2C_IsActiveFlag_SB(I2C1) != 1);                                             // Wait for Start

  LL_I2C_TransmitData8(I2C1, (DevAddress & (uint8_t)(~0x01)));                          // Send device address, RW=0
  while(LL_I2C_IsActiveFlag_ADDR(I2C1) != 1 || LL_I2C_IsActiveFlag_TXE(I2C1) != 1){     // Wait for ADDR and TXE bits to be 1
    if(LL_I2C_IsActiveFlag_AF(I2C1))                                                    // Check if got ACK failure
      break;
  }
  LL_I2C_ClearFlag_ADDR(I2C1);                                                          // Clear ADDR bit
  if(LL_I2C_IsActiveFlag_AF(I2C1)){                                                     // If NACK received
    status = ERROR;                                                                     // Error status
    LL_I2C_ClearFlag_AF(I2C1);                                                          // Clear AF bit
  }
  else{                                                                                 // Got ACK
    while(Size--) {
      LL_I2C_TransmitData8(I2C1, *pData++);                                             // Send data
      while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);                                        // Wait for TX buffer ready
      if(LL_I2C_IsActiveFlag_AF(I2C1)){                                                 // Check for NACK
        status = ERROR;                                                                 // Got NACK, stop transfer
        break;
      }
    }
  }
  LL_I2C_GenerateStopCondition(I2C1);                                                   // Send Stop
  while(LL_I2C_IsActiveFlag_MSL(I2C1) != 0);                                            // Wait until MSL bit is cleared
  return status;                                                                        // Return status
}