uart1.c 8.9 KB

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  1. /**
  2. ************************************************************************************************
  3. * @文件 : uart1.c
  4. * @作者 : 樊春春
  5. * @版本 : V1.0
  6. * @时间 : 2022/05/31 20:20:39
  7. * @邮箱 : [email protected]
  8. * @说明 : uart1底层驱动,待修复
  9. ************************************************************************************************
  10. **/
  11. #include "uart1.h"
  12. #include "queue.h"
  13. static INT8U uart1_tx_buf[UART1_TX_LEN] = {0};
  14. static INT8U uart1_rx_buf[UART1_REC_LEN] = {0};
  15. UartFrame_TypeDef Uart1FrameStruct[UART1_MAX_MSG_NUM];
  16. extern OS_EVENT *uart1_mbox;
  17. void uart1_nvic_config(void)
  18. {
  19. NVIC_InitTypeDef NVIC_InitStructure;
  20. // Usart1 NVIC 配置
  21. NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //串口1中断通道
  22. NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级
  23. NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级
  24. NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; // IRQ通道使能
  25. NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器
  26. }
  27. void uart1_dma_init(void)
  28. {
  29. DMA_InitTypeDef DMA_InitStructure;
  30. if ((u32)UART1_DMA_TXCH > (u32)DMA2) //得到当前stream是属于DMA2还是DMA1
  31. {
  32. RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); // DMA2时钟使能
  33. }
  34. else
  35. {
  36. RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); // DMA1时钟使能
  37. }
  38. DMA_DeInit(UART1_DMA_TXCH);
  39. while (DMA_GetCmdStatus(UART1_DMA_TXCH) != DISABLE)
  40. {
  41. } //等待DMA可配置
  42. /* 配置 DMA Stream */
  43. DMA_InitStructure.DMA_Channel = UART1_DMA; //通道选择
  44. DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR; // DMA外设地址
  45. DMA_InitStructure.DMA_Memory0BaseAddr = (u32)uart1_tx_buf; // DMA 存储器0地址
  46. DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral; //存储器到外设模式
  47. DMA_InitStructure.DMA_BufferSize = UART1_TX_LEN; //数据传输量
  48. DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
  49. DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
  50. DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //外设数据长度:8位
  51. DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //存储器数据长度:8位
  52. DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // 使用普通模式
  53. DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //中等优先级6
  54. DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  55. DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  56. DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //存储器突发单次传输
  57. DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //外设突发单次传输 // DMA 存储器0地址
  58. DMA_Init(UART1_DMA_TXCH, &DMA_InitStructure); //初始化DMA Stream
  59. if ((u32)UART1_DMA_RXCH > (u32)DMA2) //得到当前stream是属于DMA2还是DMA1
  60. {
  61. RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); // DMA2时钟使能
  62. }
  63. else
  64. {
  65. RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE); // DMA1时钟使能
  66. }
  67. DMA_DeInit(UART1_DMA_RXCH);
  68. while (DMA_GetCmdStatus(UART1_DMA_RXCH) != DISABLE)
  69. {
  70. }
  71. DMA_InitStructure.DMA_Channel = UART1_DMA; //通道选择
  72. DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR; // DMA外设地址
  73. DMA_InitStructure.DMA_Memory0BaseAddr = (u32)uart1_rx_buf; // DMA 存储器0地址
  74. DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; //外设到存储器模式
  75. DMA_InitStructure.DMA_BufferSize = UART1_REC_LEN; //数据传输量
  76. DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设非增量模式
  77. DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //存储器增量模式
  78. DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //外设数据长度:8位
  79. DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //存储器数据长度:8位
  80. DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; // 使用循环模式
  81. DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; //中等优先级
  82. DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  83. DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  84. DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //存储器突发单次传输
  85. DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; //外设突发单次传输
  86. DMA_Init(UART1_DMA_RXCH, &DMA_InitStructure);
  87. }
  88. void uart1_config(void)
  89. {
  90. USART_InitTypeDef USART_InitStructure;
  91. USART_InitStructure.USART_BaudRate = 9600; //波特率设置
  92. USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长为8位数据格式
  93. USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
  94. USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验位
  95. USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件数据流控制
  96. USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
  97. USART_Init(USART1, &USART_InitStructure); //初始化串口1
  98. USART_Cmd(USART1, ENABLE); //使能串口1
  99. }
  100. void Uart1DMA_Enable(DMA_Stream_TypeDef *DMA_Streamx, u16 count)
  101. {
  102. DMA_Cmd(DMA_Streamx, DISABLE); //关闭DMA传输
  103. while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE)
  104. {
  105. } //确保DMA可以被设置
  106. DMA_SetCurrDataCounter(DMA_Streamx, count); //数据传输量
  107. DMA_Cmd(DMA_Streamx, ENABLE); //开启DMA传输
  108. }
  109. void uart1_init(void)
  110. {
  111. uart1_config();
  112. uart1_dma_init();
  113. uart1_nvic_config();
  114. /* USART DMA enable*/
  115. USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE); // 使能串口DMA接收数据
  116. Uart1DMA_Enable(UART1_DMA_RXCH, UART1_REC_LEN);
  117. /*configure DMA interrupt*/
  118. USART_ITConfig(USART1, USART_IT_IDLE, ENABLE); //开启空闲中断
  119. USART_ITConfig(USART1, USART_IT_TC, ENABLE);
  120. }
  121. /****************************************************
  122. * 函 数 名:Uart1_Send_Data
  123. * 函数功能:串口1发送数据
  124. * 入口参数:buf 待发送数据 len 数据长度
  125. * 说 明:
  126. *****************************************************/
  127. void Uart1_Send_Data(const u8 *buf, u16 len)
  128. {
  129. u8 i;
  130. for (i = 0; i < len; i++) //循环发送数据
  131. {
  132. while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  133. ;
  134. USART_SendData(USART1, buf[i]);
  135. }
  136. while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  137. ;
  138. }
  139. void uart1_dma_send(const INT8U *buf, INT16U len)
  140. {
  141. if (RESET != DMA_GetFlagStatus(UART1_DMA_TXCH, DMA_FLAG_TCIF7))
  142. {
  143. DMA_ClearFlag(UART1_DMA_TXCH, DMA_FLAG_TCIF7);
  144. }
  145. if (len > UART1_TX_LEN)
  146. {
  147. len = UART1_TX_LEN;
  148. }
  149. memcpy(uart1_tx_buf, buf, len);
  150. USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE); // 使能DMA串口发送数据
  151. Uart1DMA_Enable(UART1_DMA_TXCH, len);
  152. }
  153. void USART1_IRQHandler(void)
  154. {
  155. static INT8U u1_index = 0;
  156. volatile INT8U clear = 0;
  157. INT8U rec_cnt = 0;
  158. if (RESET != USART_GetITStatus(USART1, USART_IT_IDLE))
  159. {
  160. clear = USART1->SR;
  161. clear = USART1->DR; // 先读SR, 再读DR, 就是为了消除IDLE中断
  162. DMA_Cmd(UART1_DMA_RXCH, DISABLE);
  163. DMA_ClearFlag(UART1_DMA_RXCH, DMA_FLAG_TCIF5);
  164. rec_cnt = UART1_REC_LEN - DMA_GetCurrDataCounter(UART1_DMA_RXCH); // 获得接收帧帧长 特别注意: 帧长不是DMA_GetCurrDataCounter(DMA2_Stream5)
  165. memcpy(Uart1FrameStruct[u1_index].buf, uart1_rx_buf, rec_cnt);
  166. Uart1FrameStruct[u1_index].len = rec_cnt;
  167. OSMboxPost(uart1_mbox, &Uart1FrameStruct[u1_index]);
  168. if (u1_index < UART1_MAX_MSG_NUM - 1)
  169. {
  170. u1_index++;
  171. }
  172. else
  173. {
  174. u1_index = 0;
  175. }
  176. DMA_SetCurrDataCounter(UART1_DMA_RXCH, UART1_REC_LEN);
  177. DMA_Cmd(UART1_DMA_RXCH, ENABLE);
  178. }
  179. else if (RESET != USART_GetITStatus(USART1, USART_IT_TC))
  180. {
  181. USART_ClearITPendingBit(USART1, USART_IT_TC); // 清除发送完成标标志位
  182. Uart1DMA_Enable(UART1_DMA_RXCH, UART1_REC_LEN); // DMA接收使能
  183. DMA_Cmd(UART1_DMA_TXCH, DISABLE); // 关闭发送DMA
  184. DMA_SetCurrDataCounter(UART1_DMA_TXCH, 0); // 清除发送数据长度
  185. }
  186. }