LuChiChick/STM32G030F6P6_Evaluation
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commit for I2C2 peripheral config with TX DMA channel, working on 400kHz fast mode.

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This commit is contained in:
LuChiChick
2026-08-28 15:33:48 +08:00
parent 983d63e3a5
commit dc8b4bdb5f
8 changed files with 207 additions and 17 deletions
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Core/Src/i2c.c
+116
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@@ -25,7 +25,9 @@
/* USER CODE END 0 */
I2C_HandleTypeDef hi2c1;
I2C_HandleTypeDef hi2c2;
DMA_HandleTypeDef hdma_i2c1_rx;
DMA_HandleTypeDef hdma_i2c2_tx;
/* I2C1 init function */
void MX_I2C1_Init(void)
@@ -69,6 +71,49 @@ void MX_I2C1_Init(void)
/* USER CODE END I2C1_Init 2 */
}
/* I2C2 init function */
void MX_I2C2_Init(void)
{
/* USER CODE BEGIN I2C2_Init 0 */
/* USER CODE END I2C2_Init 0 */
/* USER CODE BEGIN I2C2_Init 1 */
/* USER CODE END I2C2_Init 1 */
hi2c2.Instance = I2C2;
hi2c2.Init.Timing = 0x00C12166;
hi2c2.Init.OwnAddress1 = 0;
hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c2.Init.OwnAddress2 = 0;
hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c2) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C2_Init 2 */
/* USER CODE END I2C2_Init 2 */
}
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
@@ -131,6 +176,52 @@ void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
/* USER CODE END I2C1_MspInit 1 */
}
else if(i2cHandle->Instance==I2C2)
{
/* USER CODE BEGIN I2C2_MspInit 0 */
/* USER CODE END I2C2_MspInit 0 */
__HAL_RCC_GPIOA_CLK_ENABLE();
/**I2C2 GPIO Configuration
PA11 [PA9] ------> I2C2_SCL
PA12 [PA10] ------> I2C2_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF6_I2C2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* I2C2 clock enable */
__HAL_RCC_I2C2_CLK_ENABLE();
/* I2C2 DMA Init */
/* I2C2_TX Init */
hdma_i2c2_tx.Instance = DMA1_Channel4;
hdma_i2c2_tx.Init.Request = DMA_REQUEST_I2C2_TX;
hdma_i2c2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_i2c2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_i2c2_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_i2c2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_i2c2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_i2c2_tx.Init.Mode = DMA_NORMAL;
hdma_i2c2_tx.Init.Priority = DMA_PRIORITY_LOW;
if (HAL_DMA_Init(&hdma_i2c2_tx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(i2cHandle,hdmatx,hdma_i2c2_tx);
/* I2C2 interrupt Init */
HAL_NVIC_SetPriority(I2C2_IRQn, 3, 0);
HAL_NVIC_EnableIRQ(I2C2_IRQn);
/* USER CODE BEGIN I2C2_MspInit 1 */
/* USER CODE END I2C2_MspInit 1 */
}
}
void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
@@ -161,6 +252,31 @@ void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
/* USER CODE END I2C1_MspDeInit 1 */
}
else if(i2cHandle->Instance==I2C2)
{
/* USER CODE BEGIN I2C2_MspDeInit 0 */
/* USER CODE END I2C2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_I2C2_CLK_DISABLE();
/**I2C2 GPIO Configuration
PA11 [PA9] ------> I2C2_SCL
PA12 [PA10] ------> I2C2_SDA
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11);
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12);
/* I2C2 DMA DeInit */
HAL_DMA_DeInit(i2cHandle->hdmatx);
/* I2C2 interrupt Deinit */
HAL_NVIC_DisableIRQ(I2C2_IRQn);
/* USER CODE BEGIN I2C2_MspDeInit 1 */
/* USER CODE END I2C2_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */