Changeset 23 for trunk/fw_g473rct/Core/Src/usart.c

Timestamp:

Aug 29, 2025, 7:18:36 PM (15 hours ago)

Author:

f.jahn

Message:

modbus via DMA still BETA, aber bautratenumschaltung implementiert

File:

• trunk/fw_g473rct/Core/Src/usart.c (modified) (4 diffs)

trunk/fw_g473rct/Core/Src/usart.c

@@ -28 +28 @@
 UART_HandleTypeDef huart2;
 DMA_HandleTypeDef hdma_usart2_rx;
+DMA_HandleTypeDef hdma_usart2_tx;
 
 /* USART1 init function */
@@ -86 +87 @@
   /* USER CODE END USART2_Init 1 */
   huart2.Instance = USART2;
-  huart2.Init.BaudRate = 115200;
+  huart2.Init.BaudRate = 19200;
   huart2.Init.WordLength = UART_WORDLENGTH_9B;
   huart2.Init.StopBits = UART_STOPBITS_1;
@@ -209 +210 @@
     __HAL_LINKDMA(uartHandle,hdmarx,hdma_usart2_rx);
 
+    /* USART2_TX Init */
+    hdma_usart2_tx.Instance = DMA1_Channel7;
+    hdma_usart2_tx.Init.Request = DMA_REQUEST_USART2_TX;
+    hdma_usart2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
+    hdma_usart2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
+    hdma_usart2_tx.Init.MemInc = DMA_MINC_ENABLE;
+    hdma_usart2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
+    hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
+    hdma_usart2_tx.Init.Mode = DMA_NORMAL;
+    hdma_usart2_tx.Init.Priority = DMA_PRIORITY_LOW;
+    if (HAL_DMA_Init(&hdma_usart2_tx) != HAL_OK)
+    {
+      Error_Handler();
+    }
+
+    __HAL_LINKDMA(uartHandle,hdmatx,hdma_usart2_tx);
+
     /* USART2 interrupt Init */
     HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
@@ -257 +275 @@
     /* USART2 DMA DeInit */
     HAL_DMA_DeInit(uartHandle->hdmarx);
+    HAL_DMA_DeInit(uartHandle->hdmatx);
 
     /* USART2 interrupt Deinit */