l452 usart working

code/l452_code/Core/Inc/dma.h

@@ -0,0 +1,52 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    dma.h
+  * @brief   This file contains all the function prototypes for
+  *          the dma.c file
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2026 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __DMA_H__
+#define __DMA_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+
+/* DMA memory to memory transfer handles -------------------------------------*/
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+void MX_DMA_Init(void);
+
+/* USER CODE BEGIN Prototypes */
+
+/* USER CODE END Prototypes */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __DMA_H__ */
+

code/l452_code/Core/Inc/stm32l4xx_it.h

@@ -57,10 +57,13 @@ void PendSV_Handler(void);
 void SysTick_Handler(void);
 void EXTI0_IRQHandler(void);
 void EXTI3_IRQHandler(void);
+void DMA1_Channel4_IRQHandler(void);
+void DMA1_Channel5_IRQHandler(void);
 void ADC1_IRQHandler(void);
 void EXTI9_5_IRQHandler(void);
 void I2C1_EV_IRQHandler(void);
 void SPI1_IRQHandler(void);
+void USART1_IRQHandler(void);
 void SDMMC1_IRQHandler(void);
 void TIM6_DAC_IRQHandler(void);
 void USB_IRQHandler(void);