调试I2C遇到的一些问题
void HAL_I2C_MspInit(I2C_HandleTypeDef* hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hi2c->Instance==I2C2)
{
/* USER CODE BEGIN I2C2_MspInit 0 */
/* USER CODE END I2C2_MspInit 0 */
/**I2C2 GPIO Configuration
PB10 ------> I2C2_SCL
PB3 ------> I2C2_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; //这个选项只能为低，为其他的模式会出现错误。
GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF9_I2C2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Peripheral clock enable */
__HAL_RCC_I2C2_CLK_ENABLE();
/* USER CODE BEGIN I2C2_MspInit 1 */
/* USER CODE END I2C2_MspInit 1 */
}
}
if(hi2c->Instance==I2C1)
{
/* USER CODE BEGIN I2C1_MspInit 0 */
/* USER CODE END I2C1_MspInit 0 */
/**I2C1 GPIO Configuration
PB6 ------> I2C1_SCL
PB7 ------> I2C1_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Peripheral clock enable */
__HAL_RCC_I2C1_CLK_ENABLE();
/* Peripheral interrupt init */
HAL_NVIC_SetPriority(I2C1_EV_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2C1_EV_IRQn);
HAL_NVIC_SetPriority(I2C1_ER_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2C1_ER_IRQn);
/* USER CODE BEGIN I2C1_MspInit 1 */
/* USER CODE END I2C1_MspInit 1 */
}
else if(hi2c->Instance==I2C2)
{
/* USER CODE BEGIN I2C2_MspInit 0 */
/* USER CODE END I2C2_MspInit 0 */
/**I2C2 GPIO Configuration
PB10 ------> I2C2_SCL
PB3 ------> I2C2_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF9_I2C2; //注意模式的设置不是简单的模仿GPIO_AF4_I2C2，而是现在的这个模式
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Peripheral clock enable */
__HAL_RCC_I2C2_CLK_ENABLE();
/* USER CODE BEGIN I2C2_MspInit 1 */
/* USER CODE END I2C2_MspInit 1 */
}
else if(hi2c->Instance==I2C3)
{
/* USER CODE BEGIN I2C3_MspInit 0 */
/* USER CODE END I2C3_MspInit 0 */
/**I2C3 GPIO Configuration
PC9 ------> I2C3_SDA
PA8 ------> I2C3_SCL
*/
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF4_I2C3;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF4_I2C3;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Peripheral clock enable */
__HAL_RCC_I2C3_CLK_ENABLE();
/* USER CODE BEGIN I2C3_MspInit 1 */
/* USER CODE END I2C3_MspInit 1 */
}
第二个问题怎么修改库，让第一个I2C的写只有start，没有stop，第二条I2C的读有start也有stop。
status = HAL_I2C_Master_Transmit_touch(&hi2c2, TOUCH_ADDR, &WriteBuff[0], 1, 30 );
status = HAL_I2C_Master_Receive_touch(&hi2c2, TOUCH_ADDR, &ReadBuff[0], 8, 30);
修改库函数标红的为屏蔽代码。
HAL_StatusTypeDef HAL_I2C_Master_Transmit_touch(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0x00U;
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if(hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
{
return HAL_BUSY;
}
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
hi2c->State = HAL_I2C_STATE_BUSY_TX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->XferSize = hi2c->XferCount;
/* Send Slave Address */
if(I2C_MasterRequestWrite(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_TIMEOUT;
}
}
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
while(hi2c->XferSize > 0U)
{
/* Wait until TXE flag is set */
if(I2C_WaitOnTXEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
/* Write data to DR */
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
hi2c->XferCount--;
hi2c->XferSize--;
if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET) && (Size != 0U))
{
/* Write data to DR */
hi2c->Instance->DR = (*hi2c->pBuffPtr++);
hi2c->XferCount--;
hi2c->XferSize--;
}
/* Wait until BTF flag is set */
if(I2C_WaitOnBTFFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
return HAL_ERROR;
}
else
{
return HAL_TIMEOUT;
}
}
}
/* Generate Stop */
// hi2c->Instance->CR1 |= I2C_CR1_STOP;
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
HAL_StatusTypeDef HAL_I2C_Master_Receive_touch(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
uint32_t tickstart = 0x00U;
/* Init tickstart for timeout management*/
tickstart = HAL_GetTick();
if(hi2c->State == HAL_I2C_STATE_READY)
{
/* Wait until BUSY flag is reset */
// if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY_FLAG, tickstart) != HAL_OK)
// {
// return HAL_BUSY;
// }
/* Process Locked */
__HAL_LOCK(hi2c);
/* Check if the I2C is already enabled */
if((hi2c->Instance->CR1 & I2C_CR1_PE) != I2C_CR1_PE)
{
/* Enable I2C peripheral */
__HAL_I2C_ENABLE(hi2c);
}
/* Disable Pos */
hi2c->Instance->CR1 &= ~I2C_CR1_POS;
hi2c->State = HAL_I2C_STATE_BUSY_RX;
hi2c->Mode = HAL_I2C_MODE_MASTER;
hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
/* Prepare transfer parameters */
hi2c->pBuffPtr = pData;
hi2c->XferCount = Size;
hi2c->XferOptions = I2C_NO_OPTION_FRAME;
hi2c->XferSize = hi2c->XferCount;
/* Send Slave Address */
if(I2C_MasterRequestRead(hi2c, DevAddress, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_ERROR;
}
else
{
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_TIMEOUT;
}
}
if(hi2c->XferSize == 0U)
{
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
}
else if(hi2c->XferSize == 1U)
{
/* Disable Acknowledge */
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
}
else if(hi2c->XferSize == 2U)
{
/* Disable Acknowledge */
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
/* Enable Pos */
hi2c->Instance->CR1 |= I2C_CR1_POS;
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
else
{
/* Enable Acknowledge */
hi2c->Instance->CR1 |= I2C_CR1_ACK;
/* Clear ADDR flag */
__HAL_I2C_CLEAR_ADDRFLAG(hi2c);
}
while(hi2c->XferSize > 0U)
{
if(hi2c->XferSize <= 3U)
{
/* One byte */
if(hi2c->XferSize == 1U)
{
/* Wait until RXNE flag is set */
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
{
return HAL_TIMEOUT;
}
else
{
return HAL_ERROR;
}
}
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
}
/* Two bytes */
else if(hi2c->XferSize == 2U)
{
/* Wait until BTF flag is set */
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
}
/* 3 Last bytes */
else
{
/* Wait until BTF flag is set */
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
/* Disable Acknowledge */
hi2c->Instance->CR1 &= ~I2C_CR1_ACK;
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
/* Wait until BTF flag is set */
if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BTF, RESET, Timeout, tickstart) != HAL_OK)
{
return HAL_TIMEOUT;
}
/* Generate Stop */
hi2c->Instance->CR1 |= I2C_CR1_STOP;
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
}
}
else
{
/* Wait until RXNE flag is set */
if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
{
if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
{
return HAL_TIMEOUT;
}
else
{
return HAL_ERROR;
}
}
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BTF) == SET)
{
/* Read data from DR */
(*hi2c->pBuffPtr++) = hi2c->Instance->DR;
hi2c->XferSize--;
hi2c->XferCount--;
}
}
}
hi2c->State = HAL_I2C_STATE_READY;
hi2c->Mode = HAL_I2C_MODE_NONE;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}