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STM32F407和STM32F051主从I2C通信方法

STM32F407和STM32F051主从I2C通信方法

int main(void)
  {
  /* USER CODE BEGIN 1 */
  /* USER CODE END 1 */
  HAL_Init();
  /* Configure the system clock */
  SystemClock_Config();
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_I2C1_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
  /* USER CODE END 2 */
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */
  /* USER CODE BEGIN 3 */
  int i;
  HAL_I2C_Master_Receive_IT(&hi2c1, 0x22, bbb, 4);
  HAL_Delay(1000);
  if(i2c_flag == 1)
  {
  i2c_flag = 0;
  printf("\naddr is 11:");
  for(i = 0; i < 4; i++)
  {
  printf("%02x ", aaa[i]);
  }
  printf("\naddr is 22:");
  for(i = 0; i < 4; i++)
  {
  printf("%02x ", bbb[i]);
  }
  }
  }
  /* USER CODE END 3 */
  }
  M0作为从机:
  void IIC_GPIO_Configuration(void)
  {
  GPIO_InitTypeDef GPIO_InitStruct;
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1 , ENABLE);
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;//GPIO_Mode_IN
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_Level_3;
  GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;//open-drain
  GPIO_Init(GPIOB , &GPIO_InitStruct);
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_7;
  GPIO_Init(GPIOB , &GPIO_InitStruct);
  /* Connect PXx to I2C_SCL*/
  GPIO_PinAFConfig( GPIOB , GPIO_PinSource6, GPIO_AF_1);
  /* Connect PXx to I2C_SDA*/
  GPIO_PinAFConfig( GPIOB , GPIO_PinSource7, GPIO_AF_1);
  }
  void IIC_Configuration(void)
  {
  I2C_InitTypeDef I2C_InitStruct;
  /* I2C configuration */
  I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
  I2C_InitStruct.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
  I2C_InitStruct.I2C_DigitalFilter = 0x00;
  I2C_InitStruct.I2C_OwnAddress1 = 0x22;
  I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
  I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_InitStruct.I2C_Timing = 0xb0420f13;//100Kbits
  /* I2C Peripheral Enable */
  I2C_Cmd(I2C1, ENABLE);
  /* Apply I2C configuration after enabling it */
  I2C_Init(I2C1, &I2C_InitStruct);
  }
  int main(void)
  {
  peripheral_init();
  board_init();
  I2C1_isr.CR1 |= 0X08; //地址匹配产生中断
  while(1)
  {
  if(Recv_flag == 1)
  {
  Recv_flag = 0;
  if(I2C_GetFlagStatus(I2C1, I2C_FLAG_TCR) != SET)
  {
  printf("transfer\n");
  for( i = 0; i < 5; i++)
  {
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) != SET);
  I2C_SendData(I2C1, Data_to_M4_1[i]);
  }
  }
  }
  }
  }
  void I2C1_IRQHandler(void)
  {
  uint8_t i = 0;
  uint8_t j = 0;
  I2C_ClearITPendingBit(I2C1, I2C_ISR_ADDR);
  I2C1->ISR |= 0x00000001;
  I2C_ClearFlag(I2C1, I2C_FLAG_ADDR);
  printf("IIC irq in2\n");
  Recv_flag = 1;
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