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/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"
#include "dma.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"
/* USER CODE BEGIN Includes */
#include "stdarg.h"
#include "string.h"
//#include <stdlib.h>
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
extern UART_HandleTypeDef huart1;
extern DMA_HandleTypeDef hdma_usart1_rx;
extern DMA_HandleTypeDef hdma_usart1_tx;
/* Private variables ---------------------------------------------------------*/
#define BUFFER_SIZE 100
uint8_t rx_len=0; //接收一幀數據的長度
uint8_t recv_end_flag=0; //一幀數據接收完成標志
uint8_t rx_buffer[BUFFER_SIZE]={"123"}; //接收數據緩存
uint8_t tx_buffer[BUFFER_SIZE];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
*
* @retval None
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_TIM2_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
//printf("tst uart DMA begin\r\n");
//__HAL_UART_ENABLE_IT(&huart1, UART_IT_RXNE);
__HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE); //使能IDLE中斷
HAL_UART_Receive_DMA(&huart1,rx_buffer,BUFFER_SIZE);//啟動DMA接收
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_GPIO_WritePin(Tst_Pin_GPIO_Port, Tst_Pin_Pin, GPIO_PIN_RESET);
if(recv_end_flag ==1)
{
HAL_UART_Transmit(&huart1,rx_buffer, rx_len,200);//接收數據打印出來
rx_len=0;
recv_end_flag=0;
//memset(rx_buffer,0x00,BUFFER_SIZE);
HAL_UART_Receive_DMA(&huart1,rx_buffer,BUFFER_SIZE); //重啟DMA接收
}
HAL_GPIO_WritePin(Tst_Pin_GPIO_Port, Tst_Pin_Pin, GPIO_PIN_SET);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* USER CODE END 3 */
}
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_SYSCLK, RCC_MCODIV_1);
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USER CODE BEGIN 4 */
void UART_IDLE_Callback(UART_HandleTypeDef *huart)
{
uint16_t i = 0;
if((__HAL_UART_GET_FLAG(huart,UART_FLAG_IDLE) != RESET))
{
if(huart->Instance == USART1)
{
__HAL_UART_CLEAR_IDLEFLAG(huart);
i = huart->Instance->SR;
i = huart->Instance->DR;
i = hdma_usart1_rx.Instance->CNDTR; //讀取DMA剩余傳輸數量
HAL_UART_DMAStop(huart);
/* 此處處理數據，主要是拷貝和置位標志位 */
if((recv_end_flag == 0)&&(i!=BUFFER_SIZE))
{
rx_len = BUFFER_SIZE - i;
//memcpy(tx_buffer,rx_buffer,rx_len);
recv_end_flag = 1;
}
else
{
/* 清空緩存，重新接收 */
//memset(rx_buffer,0x00,BUFFER_SIZE);
HAL_UART_Receive_DMA(huart,(uint8_t *)&rx_buffer,BUFFER_SIZE);
}
}
}
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @param file: The file name as string.
* @param line: The line in file as a number.
* @retval None
*/
void _Error_Handler(char *file, int line)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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