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[活动专区] 【AT-START-F407测评】+ 串口收发

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 楼主| 比神乐 发表于 2021-1-29 12:56 | 显示全部楼层 |阅读模式
串口收发, start, IO, USART, SAR
今天搞了一下串口
串口2
代码：
复制
  1. #include "at32f4xx.h"
    

  2. #include "at32_board.h"
    


  3. 

  4. /** @addtogroup AT32F407_StdPeriph_Examples
    

  5.   * @{
    

  6.   */
    


  7. 

  8. /** @addtogroup USART_Interrupt
    

  9.   * @{
    

  10.   */ 
    

  11.   
    

  12. /* Private typedef -----------------------------------------------------------*/
    

  13. typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
    


  14. 

  15. /* Private define ------------------------------------------------------------*/
    

  16. #define TxBufferSize1   (countof(TxBuffer1) - 1)
    

  17. #define TxBufferSize2   (countof(TxBuffer2) - 1)
    

  18. #define RxBufferSize1   TxBufferSize2
    

  19. #define RxBufferSize2   TxBufferSize1
    


  20. 

  21. /* Private macro -------------------------------------------------------------*/
    

  22. #define countof(a)   (sizeof(a) / sizeof(*(a)))
    


  23. 

  24. /* Private variables ---------------------------------------------------------*/
    

  25. USART_InitType USART_InitStructure;
    

  26. uint8_t TxBuffer1[] = "USART Interrupt Example: USART2 -> USART3 using Interrupt";
    

  27. uint8_t TxBuffer2[] = "USART Interrupt Example: USART3 -> USART2 using Interrupt";
    

  28. uint8_t RxBuffer1[RxBufferSize1];
    

  29. uint8_t RxBuffer2[RxBufferSize2];
    

  30. __IO uint8_t TxCounter1 = 0x00;
    

  31. __IO uint8_t TxCounter2 = 0x00;
    

  32. __IO uint8_t RxCounter1 = 0x00; 
    

  33. __IO uint8_t RxCounter2 = 0x00;
    

  34. uint8_t NbrOfDataToTransfer1 = TxBufferSize1;
    

  35. uint8_t NbrOfDataToTransfer2 = TxBufferSize2;
    

  36. uint8_t NbrOfDataToRead1 = RxBufferSize1;
    

  37. uint8_t NbrOfDataToRead2 = RxBufferSize2;
    

  38. __IO TestStatus TransferStatus1 = FAILED; 
    

  39. __IO TestStatus TransferStatus2 = FAILED;
    


  40. 

  41. /* Private function prototypes -----------------------------------------------*/
    

  42. void RCC_Configuration(void);
    

  43. void GPIO_Configuration(void);
    

  44. void NVIC_Configuration(void);
    

  45. TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
    


  46. 

  47. /* Private functions ---------------------------------------------------------*/
    


  48. 

  49. /**
    

  50.   * [url=home.php?mod=space&uid=247401]@brief[/url]   Main program
    

  51.   * @param  None
    

  52.   * @retval None
    

  53.   */
    

  54. int main(void)
    

  55. {  
    

  56.   /* System Clocks Configuration */
    

  57.   RCC_Configuration();
    

  58.        
    

  59.   /* NVIC configuration */
    

  60.   NVIC_Configuration();
    


  61. 

  62.   /* Configure the GPIO ports */
    

  63.   GPIO_Configuration();
    


  64. 

  65.   /* Initialize Leds mounted on board */
    

  66.   AT32_Board_Init();
    

  67.   
    

  68.   /* USART2 and USART3 configuration ------------------------------------------------------*/
    

  69.   /* USART2 and USART3 configured as follow:
    

  70.         - BaudRate = 9600 baud  
    

  71.         - Word Length = 8 Bits
    

  72.         - One Stop Bit
    

  73.         - No parity
    

  74.         - Hardware flow control disabled (RTS and CTS signals)
    

  75.         - Receive and transmit enabled
    

  76.   */
    

  77.   USART_StructInit(&USART_InitStructure);
    

  78.   USART_InitStructure.USART_BaudRate = 9600;
    

  79.   USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    

  80.   USART_InitStructure.USART_StopBits = USART_StopBits_1;
    

  81.   USART_InitStructure.USART_Parity = USART_Parity_No;
    

  82.   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    

  83.   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    


  84. 

  85.   /* Configure USART2 */
    

  86.   USART_Init(USART2, &USART_InitStructure);
    

  87.   
    

  88.   
    

  89.   /* Enable USART2 Receive and Transmit interrupts */
    

  90.   USART_INTConfig(USART2, USART_INT_RDNE, ENABLE);
    

  91.   //USART_INTConfig(USART2, USART_INT_TDE, ENABLE);
    


  92. 

  93.   
    

  94.   /* Enable the USART2 */
    

  95.   USART_Cmd(USART2, ENABLE);
    

  96.   
    


  97. 

  98.   while(1)
    

  99.         {
    

  100.         }
    

  101. }
    


  102. 

  103. /**
    

  104.   * @brief  Configures the different system clocks.
    

  105.   * @param  None
    

  106.   * @retval None
    

  107.   */
    

  108. void RCC_Configuration(void)
    

  109. {   
    

  110.   /* Enable GPIO clock */
    

  111.   RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOA | RCC_APB2PERIPH_GPIOD | RCC_APB2PERIPH_GPIOC | RCC_APB2PERIPH_AFIO, ENABLE);
    


  112. 

  113.   /* Enable USART2 Clock */
    

  114.   RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_USART2, ENABLE); 
    


  115. 

  116.   /* Enable USART3 Clock */
    

  117.   //RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_USART3, ENABLE);  
    

  118. }
    


  119. 

  120. /**
    

  121.   * @brief  Configures the different GPIO ports.
    

  122.   * @param  None
    

  123.   * @retval None
    

  124.   */
    

  125. void GPIO_Configuration(void)
    

  126. {
    

  127.   GPIO_InitType GPIO_InitStructure;
    


  128. 

  129.   /* Enable the USART3 Pins Software Remapping */
    

  130.   //GPIO_PinsRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
    

  131.   
    

  132.   /* Enable the USART2 Pins Software Remapping */
    

  133.   //GPIO_PinsRemapConfig(GPIO_Remap_USART2, ENABLE);  
    


  134. 


  135. 

  136.   /* Configure USART2 Rx as input floating */
    

  137.   GPIO_InitStructure.GPIO_Pins = GPIO_Pins_3;
    

  138.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    

  139.   GPIO_Init(GPIOA, &GPIO_InitStructure);
    

  140.   
    

  141.   /* Configure USART3 Rx as input floating */
    

  142. //  GPIO_InitStructure.GPIO_Pins = GPIO_Pins_11;
    

  143. //  GPIO_Init(GPIOC, &GPIO_InitStructure);  
    

  144.   
    

  145.   /* Configure USART2 Tx as alternate function push-pull */
    

  146.   GPIO_InitStructure.GPIO_Pins = GPIO_Pins_2;
    

  147.   GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
    

  148.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    

  149.   GPIO_Init(GPIOA, &GPIO_InitStructure);
    


  150. 

  151. //  /* Configure USART3 Tx as alternate function push-pull */
    

  152. //  GPIO_InitStructure.GPIO_Pins = GPIO_Pins_10;
    

  153. //  GPIO_Init(GPIOC, &GPIO_InitStructure);  
    

  154. }
    

  155. /**
    

  156.   * @brief  Configures the nested vectored interrupt controller.
    

  157.   * @param  None
    

  158.   * @retval None
    

  159.   */
    

  160. void NVIC_Configuration(void)
    

  161. {
    

  162.   NVIC_InitType NVIC_InitStructure;
    


  163. 

  164.   /* Configure the NVIC Preemption Priority Bits */  
    

  165.   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    

  166.   
    

  167.   /* Enable the USART2 Interrupt */
    

  168.   NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    

  169.   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    

  170.   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    

  171.   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    

  172.   NVIC_Init(&NVIC_InitStructure);
    


  173. 

  174.   /* Enable the USART3 Interrupt */
    

  175. //  NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
    

  176. //  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    

  177. //  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    

  178. //  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    

  179. //  NVIC_Init(&NVIC_InitStructure);
    

  180. }
    


  181. 

  182. /**
    

  183.   * @brief  Compares two buffers.
    

  184.   * @param  pBuffer1, pBuffer2: buffers to be compared.
    

  185.   * @param  BufferLength: buffer's length
    

  186.   * @retval PASSED: pBuffer1 identical to pBuffer2
    

  187.   *         FAILED: pBuffer1 differs from pBuffer2
    

  188.   */
    

  189. TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
    

  190. {
    

  191.   while(BufferLength--)
    

  192.   {
    

  193.     if(*pBuffer1 != *pBuffer2)
    

  194.     {
    

  195.       return FAILED;
    

  196.     }
    


  197. 

  198.     pBuffer1++;
    

  199.     pBuffer2++;
    

  200.   }
    


  201. 

  202.   return PASSED;
    

  203. }
    


  204. 

  205. #ifdef  USE_FULL_ASSERT
    


  206. 

  207. /**
    

  208.   * @brief  Reports the name of the source file and the source line number
    

  209.   *         where the assert_param error has occurred.
    

  210.   * @param  file: pointer to the source file name
    

  211.   * @param  line: assert_param error line source number
    

  212.   * @retval None
    

  213.   */
    

  214. void assert_failed(uint8_t* file, uint32_t line)
    

  215. { 
    

  216.   /* User can add his own implementation to report the file name and line number,
    

  217.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    


  218. 

  219.   /* Infinite loop */
    

  220.   while (1)
    

  221.   {}
    

  222. }
    


  223. 

  224. #endif
    


  225. 

  226. /**
    

  227.   * @}
    

  228.   */ 
    


  229. 

  230. /**
    

  231.   * @}
    

  232.   */ 
    


  233. 

  234. void USART2_IRQHandler(void)
    

  235. {
    

  236.   if(USART_GetITStatus(USART2, USART_INT_RDNE) != RESET)
    

  237.   {
    

  238.     /* Read one byte from the receive data register */
    

  239.     RxBuffer1[0] = USART_ReceiveData(USART2);
    

  240.                 /* Write one byte to the transmit data register */
    

  241.     USART_SendData(USART2, RxBuffer1[0]);
    

  242.     
    

  243.   }
    

  244. //  
    

  245. //  if(USART_GetITStatus(USART2, USART_INT_TDE) != RESET)
    

  246. //  {   
    

  247. //    /* Write one byte to the transmit data register */
    

  248. //    USART_SendData(USART2, TxBuffer1[TxCounter1++]);
    


  249. 

  250. //    if(TxCounter1 == NbrOfDataToTransfer1)
    

  251. //    {
    

  252. //      /* Disable the USART2 Transmit interrupt */
    

  253. //      USART_INTConfig(USART2, USART_INT_TDE, DISABLE);
    

  254. //    }    
    

  255. //  }
    

  256. }
效果图：
1.jpg
4.jpg
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