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標(biāo)題: STM32串口實(shí)現(xiàn)不定長(zhǎng)數(shù)據(jù)接受發(fā)送 源程序 [打印本頁(yè)]

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作者: 76898798797    時(shí)間: 2021-3-4 00:01
標(biāo)題: STM32串口實(shí)現(xiàn)不定長(zhǎng)數(shù)據(jù)接受發(fā)送 源程序

1. 
   
2. /* Includes ------------------------------------------------------------------*/
   
3. #include "main.h"
   
4. #include "stm32f1xx_hal.h"
   
5. #include "dma.h"
   
6. #include "usart.h"
   
7. #include "gpio.h"
   
8. 
   
9. /* USER CODE BEGIN Includes */
   
10. 
    
11. 
    
12. 
    
13. /* USER CODE END Includes */
    
14. 
    
15. /* Private variables ---------------------------------------------------------*/
    
16. 
    
17. /* USER CODE BEGIN PV */
    
18. /* Private variables ---------------------------------------------------------*/
    
19. 
    
20.   uint8_t Rx_flag = 0;
    
21.   uint8_t TxBuf[TX_DATA_LEN] = {0};
    
22.   uint8_t RxBuf[RX_DATA_LEN] = {0};
    
23.   
    
24.   
    
25.   uint8_t recv_end_flag = 0,Rx_len;      
    
26.   
    
27. /* USER CODE END PV */
    
28. 
    
29. /* Private function prototypes -----------------------------------------------*/
    
30. void SystemClock_Config(void);
    
31. 
    
32. /* USER CODE BEGIN PFP */
    
33. /* Private function prototypes -----------------------------------------------*/
    
34. 
    
35. /* USER CODE END PFP */
    
36. 
    
37. /* USER CODE BEGIN 0 */
    
38. 
    
39. /* USER CODE END 0 */
    
40. 
    
41. int main(void)
    
42. {
    
43. 
    
44.   /* USER CODE BEGIN 1 */
    
45.   
    
46.   /* USER CODE END 1 */
    
47. 
    
48.   /* MCU Configuration----------------------------------------------------------*/
    
49. 
    
50.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    
51.   HAL_Init();
    
52. 
    
53.   /* USER CODE BEGIN Init */
    
54. 
    
55.   /* USER CODE END Init */
    
56. 
    
57.   /* Configure the system clock */
    
58.   SystemClock_Config();
    
59. 
    
60.   /* USER CODE BEGIN SysInit */
    
61. 
    
62.   /* USER CODE END SysInit */
    
63. 
    
64.   /* Initialize all configured peripherals */
    
65.   MX_GPIO_Init();
    
66.   MX_DMA_Init();
    
67.   MX_USART1_UART_Init();
    
68. 
    
69.   /* USER CODE BEGIN 2 */
    
70.   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);
    
71.   HAL_Delay(1000);
    
72.   HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_SET);
    
73.   
    
74.   
    
75.   for(Rx_flag = 0; Rx_flag < TX_DATA_LEN; Rx_flag++)
    
76.   {
    
77.     TxBuf[Rx_flag] = Rx_flag;
    
78.   }
    
79.   Rx_flag = 0;
    
80.   
    
81.   /* 使用DMA傳輸數(shù)據(jù)到電腦端 */
    
82.   RS485_TX_MODE();    //進(jìn)入發(fā)送模式
    
83.   HAL_UART_Transmit_DMA(&huart1,TxBuf, 150);
    
84.   HAL_Delay(10);
    
85.   HAL_UART_Receive_DMA(&huart1,RxBuf, 5);
    
86.   
    
87.   
    
88.   
    
89.   /* USER CODE END 2 */
    
90. 
    
91.   /* Infinite loop */
    
92.   /* USER CODE BEGIN WHILE */
    
93.   while (1)
    
94.   {
    
95.     if(recv_end_flag ==1)
    
96.     {
    
97.       RS485_TX_MODE();    //進(jìn)入發(fā)送模式
    
98.       HAL_UART_Transmit_DMA(&huart1,(uint8_t *)RxBuf,Rx_len);
    
99.       Rx_flag = 0;
    
100.       HAL_Delay(100);
     
101.       for(int i = 0; i < Rx_len ; i++)
     
102.               RxBuf[i]=0;
     
103.       Rx_len=0;
     
104.       recv_end_flag=0;
     
105.       
     
106.       /*        ready for next receive        */
     
107.       RS485_RX_MODE();
     
108.       HAL_UART_Receive_DMA(&huart1,(uint8_t*)RxBuf, 30);
     
109.     }
     
110.    
     
111.    
     
112.    
     
113.    
     
114.     //USART DMA mode
     
115. //    if(Rx_flag == 1)
     
116. //    {
     
117. //      RS485_TX_MODE();    //進(jìn)入發(fā)送模式
     
118. //      HAL_UART_Transmit_DMA(&huart1,(uint8_t *)RxBuf,32);
     
119. //      Rx_flag = 0;
     
120. //      HAL_Delay(10);
     
121. //    }
     
122. //    if(Rx_flag == 2)
     
123. //    {
     
124. //      HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_8);
     
125. //      Rx_flag = 0;
     
126. //    }
     
127.    
     
128.       
     
129.    
     
130. //    //TxRx INT mode  
     
131. //    if(Rx_flag == 1)
     
132. //    {
     
133. //      RS485_TX_MODE();    //進(jìn)入發(fā)送模式
     
134. //      HAL_UART_Transmit_IT(&huart1,(uint8_t *)TxBuf,6);
     
135. //      Rx_flag = 0;
     
136. //      HAL_Delay(100);
     
137. //    }
     
138. 
     
139. //    TxRx blocking mode   
     
140. //    /* 進(jìn)入發(fā)送模式 */
     
141. //    RS485_TX_MODE();
     
142. ////    HAL_Delay(10);
     
143. //    /* 發(fā)送數(shù)據(jù),輪詢直到發(fā)送數(shù)據(jù)完畢 */
     
144. //    if(HAL_UART_Transmit(&huart1, temp,DATA_LEN,100)==HAL_OK)
     
145. //    {
     
146. //      while(__HAL_UART_GET_FLAG(&huart1,UART_FLAG_TC)!=1);      
     
147. //    }
     
148. //   
     
149. ////    HAL_Delay(100);
     
150. //    /* 進(jìn)入接收模式 */
     
151. //    RS485_RX_MODE();
     
152. ////    HAL_Delay(10);
     
153. //    /* 輪詢直到485接收到數(shù)據(jù) */
     
154. //    while(        __HAL_UART_GET_FLAG(&huart1,UART_FLAG_RXNE)!= HAL_ERROR);
     
155. //    HAL_UART_Receive(&huart1,temp,DATA_LEN,100);
     
156. 
     
157. ////    HAL_Delay(10);
     
158.   /* USER CODE END WHILE */
     
159. 
     
160.   /* USER CODE BEGIN 3 */
     
161. 
     
162.   }
     
163.   /* USER CODE END 3 */
     
164. 
     
165. }
     
166. 
     
167. /** System Clock Configuration
     
168. */
     
169. void SystemClock_Config(void)
     
170. {
     
171. 
     
172.   RCC_OscInitTypeDef RCC_OscInitStruct;
     
173.   RCC_ClkInitTypeDef RCC_ClkInitStruct;
     
174. 
     
175.     /**Initializes the CPU, AHB and APB busses clocks
     
176.     */
     
177.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
     
178.   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
     
179.   RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
     
180.   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
     
181.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
     
182.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
     
183.   RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
     
184.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
185.   {
     
186.     _Error_Handler(__FILE__, __LINE__);
     
187.   }
     
188. 
     
189.     /**Initializes the CPU, AHB and APB busses clocks
     
190.     */
     
191.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     
192.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     
193.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     
194.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV2;
     
195.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     
196.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     
197. 
     
198.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
     
199.   {
     
200.     _Error_Handler(__FILE__, __LINE__);
     
201.   }
     
202. 
     
203.     /**Configure the Systick interrupt time
     
204.     */
     
205.   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
     
206. 
     
207.     /**Configure the Systick
     
208.     */
     
209.   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
     
210. 
     
211.   /* SysTick_IRQn interrupt configuration */
     
212.   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
     
213. }
     
214. 
     
215. /* USER CODE BEGIN 4 */
     
216. 
     
217. /* USER CODE END 4 */
     
218. 
     
219. /**
     
220.   * @brief  This function is executed in case of error occurrence.
     
221.   * @param  None
     
222.   * @retval None
     
223.   */
     
224. void _Error_Handler(char * file, int line)
     
225. {
     
226.   /* USER CODE BEGIN Error_Handler_Debug */
     
227.   /* User can add his own implementation to report the HAL error return state */
     
228.   while(1)
     
229.   {
     
230.   }
     
231.   /* USER CODE END Error_Handler_Debug */
     
232. }
     
233. 
     
234. #ifdef USE_FULL_ASSERT
     
235. 
     
236. /**
     
237.    * @brief Reports the name of the source file and the source line number
     
238.    * where the assert_param error has occurred.
     
239.    * @param file: pointer to the source file name
     
240.    * @param line: assert_param error line source number
     
241.    * @retval None
     
242.    */
     
243. void assert_failed(uint8_t* file, uint32_t line)
     
244. {
     
245.   /* USER CODE BEGIN 6 */
     
246.   /* User can add his own implementation to report the file name and line number,
     
247.     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
248.   /* USER CODE END 6 */
     
249. 
     
250. }
     
251. 
     
252. #endif
     
253. 
     
254. /**
     
255.   * @}
     
256.   */
     
257. 
     
258. /**
     
259.   * @}
     
260. */
     

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RS485_DMA方式接受不定長(zhǎng)數(shù)據(jù).7z

2021-3-4 15:03 上傳

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