using LPUART to forward Bluetooth messages !

Core/Src/main.c

@@ -43,11 +43,13 @@
 #include "BSP_GPIO.h"
 #include "BSP_ADC.h"
 #include "ram_loader.h"
+#include "AsyncComm.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
 /* USER CODE BEGIN PTD */
-uint8_t lp_buffer[2][1024] = {0};
+extern uart_desc_t uart_half;
+__attribute__((__section__(".dma_buffer"))) uint8_t lp_buffer[2][2048] = {0};
 uint8_t swap_index = 0;
 /* USER CODE END PTD */
 
@@ -142,13 +144,19 @@ int main(void)
   BSP_GPIO_PeriperalsOn();
   BSP_POWER_Init();
   ULOG_INIT();
-  //ULOG_SUBSCRIBE(ULOG_SendLPUART,ULOG_DEBUG_LEVEL);
+  ULOG_SUBSCRIBE(ULOG_SendLPUART,ULOG_DEBUG_LEVEL);
   ULOG_DEBUG("Setup Logger");
   gCLS_DEVICE_ADDRESS = 0x11; // Address is set to master
   ULOG_DEBUG("Setting Global CLS address to 0b10001");
   ULOG_DEBUG("Init Kernel and start schedule");
+  
+  //HAL_UART_Receive(&hlpuart1, lp_buffer[swap_index], 10, 10000);
 
-  HAL_UART_Receive_DMA(&hlpuart1, lp_buffer[0], 1024);
+  HAL_StatusTypeDef status = HAL_UARTEx_ReceiveToIdle_DMA(&hlpuart1, lp_buffer[swap_index], 2048);
+  if(status != HAL_OK){
+    ULOG_ERROR("Failed to start DMA");
+    Error_Handler();
+  }
 
   /* USER CODE END 2 */
 
@@ -172,6 +180,37 @@ int main(void)
   /* USER CODE END 3 */
 }
 
+void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
+  if(huart->Instance ==LPUART1){
+    uint8_t new_index = (swap_index + 1) % 2;
+    HAL_UARTEx_ReceiveToIdle_DMA(&hlpuart1, lp_buffer[new_index], 2048);
+    usart_send_data(&uart_half, lp_buffer[swap_index], 2048);
+    swap_index = new_index;
+  }
+}
+
+void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size){
+ //restarts the DMA listening of the UART rx (next 247 bytes)
+	if(huart->Instance ==LPUART1){
+    
+    uint8_t new_index = (swap_index + 1) % 2;
+		HAL_UARTEx_ReceiveToIdle_DMA(&hlpuart1, lp_buffer[new_index], 2048);
+    usart_send_data(&uart_half, lp_buffer[swap_index], Size);
+    swap_index = new_index;
+	}
+	return;
+}
+
+
+void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
+{
+  /* Prevent unused argument(s) compilation warning */
+	if(huart->Instance ==LPUART1){
+    swap_index = (swap_index + 1) % 2;
+		HAL_UARTEx_ReceiveToIdle_DMA(&hlpuart1, lp_buffer[swap_index], 2048);
+	}
+}
+
 /**
   * @brief System Clock Configuration
   * @retval None

Core/Src/stm32h7xx_it.c

@@ -65,6 +65,7 @@ extern FDCAN_HandleTypeDef hfdcan2;
 extern LPTIM_HandleTypeDef hlptim4;
 extern DMA_HandleTypeDef hdma_lpuart1_rx;
 extern DMA_HandleTypeDef hdma_lpuart1_tx;
+extern UART_HandleTypeDef hlpuart1;
 extern RTC_HandleTypeDef hrtc;
 extern SD_HandleTypeDef hsd1;
 extern TIM_HandleTypeDef htim2;
@@ -519,6 +520,22 @@ void LPTIM4_IRQHandler(void)
   /* USER CODE END LPTIM4_IRQn 1 */
 }
 
+/**
+  * @brief This function handles LPUART1 global interrupt.
+  */
+void LPUART1_IRQHandler(void)
+{
+  /* USER CODE BEGIN LPUART1_IRQn 0 */
+
+  /* USER CODE END LPUART1_IRQn 0 */
+  HAL_UART_IRQHandler(&hlpuart1);
+  /* USER CODE BEGIN LPUART1_IRQn 1 */
+
+  
+
+  /* USER CODE END LPUART1_IRQn 1 */
+}
+
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */

Core/Src/usart.c

@@ -41,7 +41,7 @@ void MX_LPUART1_UART_Init(void)
 
   /* USER CODE END LPUART1_Init 1 */
   hlpuart1.Instance = LPUART1;
-  hlpuart1.Init.BaudRate = 1000000;
+  hlpuart1.Init.BaudRate = 3000000;
   hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
   hlpuart1.Init.StopBits = UART_STOPBITS_1;
   hlpuart1.Init.Parity = UART_PARITY_NONE;
@@ -377,6 +377,9 @@ void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
 
     __HAL_LINKDMA(uartHandle,hdmatx,hdma_lpuart1_tx);
 
+    /* LPUART1 interrupt Init */
+    HAL_NVIC_SetPriority(LPUART1_IRQn, 5, 0);
+    HAL_NVIC_EnableIRQ(LPUART1_IRQn);
   /* USER CODE BEGIN LPUART1_MspInit 1 */
 
   /* USER CODE END LPUART1_MspInit 1 */
@@ -405,6 +408,9 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
     /* LPUART1 DMA DeInit */
     HAL_DMA_DeInit(uartHandle->hdmarx);
     HAL_DMA_DeInit(uartHandle->hdmatx);
+
+    /* LPUART1 interrupt Deinit */
+    HAL_NVIC_DisableIRQ(LPUART1_IRQn);
   /* USER CODE BEGIN LPUART1_MspDeInit 1 */
 
   /* USER CODE END LPUART1_MspDeInit 1 */