Changeset 22 for trunk/fw_g473rct/Core/Src/usart.c

Timestamp:

Aug 29, 2025, 6:15:42 PM (24 hours ago)

Author:

f.jahn

Message:

DMA Rx funktioniert, aber BETA und nur feste Baudrate

File:

• trunk/fw_g473rct/Core/Src/usart.c (modified) (7 diffs)

trunk/fw_g473rct/Core/Src/usart.c

@@ -27 +27 @@
 UART_HandleTypeDef huart1;
 UART_HandleTypeDef huart2;
+DMA_HandleTypeDef hdma_usart2_rx;
 
 /* USART1 init function */
@@ -86 +87 @@
   huart2.Instance = USART2;
   huart2.Init.BaudRate = 115200;
-  huart2.Init.WordLength = UART_WORDLENGTH_8B;
+  huart2.Init.WordLength = UART_WORDLENGTH_9B;
   huart2.Init.StopBits = UART_STOPBITS_1;
-  huart2.Init.Parity = UART_PARITY_NONE;
+  huart2.Init.Parity = UART_PARITY_EVEN;
   huart2.Init.Mode = UART_MODE_TX_RX;
   huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
@@ -94 +95 @@
   huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
   huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
-  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_SWAP_INIT;
+  huart2.AdvancedInit.Swap = UART_ADVFEATURE_SWAP_ENABLE;
   if (HAL_UART_Init(&huart2) != HAL_OK)
   {
@@ -152 +154 @@
     HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
+    /* USART1 interrupt Init */
+    HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(USART1_IRQn);
   /* USER CODE BEGIN USART1_MspInit 1 */
 
@@ -186 +191 @@
     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
+    /* USART2 DMA Init */
+    /* USART2_RX Init */
+    hdma_usart2_rx.Instance = DMA1_Channel6;
+    hdma_usart2_rx.Init.Request = DMA_REQUEST_USART2_RX;
+    hdma_usart2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
+    hdma_usart2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
+    hdma_usart2_rx.Init.MemInc = DMA_MINC_ENABLE;
+    hdma_usart2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
+    hdma_usart2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
+    hdma_usart2_rx.Init.Mode = DMA_NORMAL;
+    hdma_usart2_rx.Init.Priority = DMA_PRIORITY_LOW;
+    if (HAL_DMA_Init(&hdma_usart2_rx) != HAL_OK)
+    {
+      Error_Handler();
+    }
+
+    __HAL_LINKDMA(uartHandle,hdmarx,hdma_usart2_rx);
+
+    /* USART2 interrupt Init */
+    HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(USART2_IRQn);
   /* USER CODE BEGIN USART2_MspInit 1 */
 
@@ -209 +235 @@
     HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4|GPIO_PIN_5);
 
+    /* USART1 interrupt Deinit */
+    HAL_NVIC_DisableIRQ(USART1_IRQn);
   /* USER CODE BEGIN USART1_MspDeInit 1 */
 
@@ -227 +255 @@
     HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
 
+    /* USART2 DMA DeInit */
+    HAL_DMA_DeInit(uartHandle->hdmarx);
+
+    /* USART2 interrupt Deinit */
+    HAL_NVIC_DisableIRQ(USART2_IRQn);
   /* USER CODE BEGIN USART2_MspDeInit 1 */