硬件IIC通讯问题

菜鸟初学者 · 发表于 2017-3-1 15:53:19

采用用两块STM8S003通过硬件IIC进行主从机通讯，已经能够进行正常的通讯；可是将程序移植到两块STM8S005上就不行了我想问一下这个是什么问题；我的程序是参考了ST官网的例程：主机程序如下：int IIC_send_DATA_num;void I2C_WriteRegister(u8 u8_NumByteToWrite, u8 Slave_Address)
{
  IIC_send_DATA_num = 2;
  while((I2C->SR3 & 2))    // Wait while the bus is busy
  {
I2C->CR2 |= I2C_CR2_STOP;                         // STOP=1, generate stop
while((I2C->CR2 & I2C_CR2_STOP)) ;      // wait until stop is performed
  }
  I2C->CR2 |= 1;                         // START=1, generate start
  while(((I2C->SR1 & 1)==0)); // Wait for start bit detection (SB)
  delay_us(3);                           // SB clearing sequence
#ifdef TEN_BITS_ADDRESS    // TEN_BIT_ADDRESS decalred in I2c_master_poll.h
  I2C->DR = (u8)(((Slave_Address >> 7) & 6) | 0xF0);  // Send header of 10-bit device address (R/W = 0)
  while(!(I2C->SR1 & 8)); // Wait for header ack (ADD10)
  I2C->DR = (u8)(Slave_Address);         // Send lower 8-bit device address & Write
#else
  I2C->DR = (u8)(Slave_Address << 1);    // Send 7-bit device address & Write (R/W = 0)
#endif
  while(!(I2C->SR1 & 2));      // Wait for address ack (ADDR)
  delay_us(3);                           // ADDR clearing sequence
  I2C->SR3;             // send Offset command
  while(!(I2C->SR1 & 0x80));
  I2C->DR = IIC_send_ceshi[u8_NumByteToWrite];
  while(((I2C->SR1 & 0x84) != 0x84)); // Wait for TxE & BTF
  delay_us(3);                           // clearing sequence

  I2C->CR2 |= 2;                         // generate stop here (STOP=1)
  while((I2C->CR2 & 2));       // wait until stop is performed

}