zhyinch
2021-04-06 c7bcc24c444c9b9197beb9ce6541f85e6b4f8c5c
Ô´Âë/ºËÐİå/Src/OnChipDevices/Usart.c
@@ -204,6 +204,7 @@
   
   //发送一个字节数据
   EXT_UART->DR = m_EUART_TxFrames[m_EUART_TxFrm_Tail].buf[s_count];      
    EXT_UART2->DR = m_EUART_TxFrames[m_EUART_TxFrm_Tail].buf[s_count];
   s_count++;
   if(s_count >= m_EUART_TxFrames[m_EUART_TxFrm_Tail].len)      //一帧数据发送完毕
   {
@@ -322,4 +323,136 @@
   while (!(USART1->SR & USART_FLAG_TXE));
   return (ch);
}
//////////////////////////////////////////////////////////////USART2
void UART2_DMAConfiguration(void)
{
   DMA_InitTypeDef DMA_InitStructure;
   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
   //UART的DMA数据接收初始化
   DMA_DeInit(UART2_RX_DMA_CH);
   DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)( &(EXT_UART2->DR));         //外设数据寄存器
   DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)m_EUART_DMA_RXBuf;            //数据Buf
   DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;                     //外设作源头
   DMA_InitStructure.DMA_BufferSize = EUART_RX_BUF_SIZE;                  //Buf大小
   DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;         //外设地址不增加
   DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                  //内存地址增加
   DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;      //字节
   DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;            //字节(注意与上一个变量名称不同!!)
   DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;                        //循环模式
   DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;                  //优先级
   DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;                        //非内存到内存
   DMA_Init(UART2_RX_DMA_CH, &DMA_InitStructure);
   USART_DMACmd(EXT_UART2, USART_DMAReq_Rx, ENABLE);
   DMA_Cmd(UART2_RX_DMA_CH, ENABLE);
#ifdef EXUART_USE_TXDMA
   //UART的DMA数据发送初始化
   DMA_DeInit(EUART_TX_DMA_CH);
   DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(EXT_UART->DR));         //外设数据寄存器
   DMA_InitStructure.DMA_MemoryBaseAddr = 0;                           //数据Buf
   DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;                     //外设作目标
   DMA_InitStructure.DMA_BufferSize = 0;                              //Buf大小
   DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;         //外设地址寄存器不递增
   DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                  //内存地址递增
   DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;      //外设字节为单位
   DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;            //内存字节为单位(注意与上一个变量名称不同!!)
   DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;                        //普通模式
   DMA_InitStructure.DMA_Priority = DMA_Priority_High;                     //优先级
   DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;                        //非内存到内存
   DMA_Init(EUART_TX_DMA_CH, &DMA_InitStructure);
//   DMA_ITConfig(EUART_TX_DMA_CH, DMA_IT_TC, ENABLE);                     //DMA传输完成中断
   USART_DMACmd(EXT_UART,USART_DMAReq_Tx,ENABLE);                        //外设使能DMA  // */
#endif
}
void Uart2_Init(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
   USART_InitTypeDef USART_InitStructure;
   USART_ClockInitTypeDef USART_ClockInitStructure;
   /* Enable GPIO clock */
 //   RCC_APB2PeriphClockCmd(EU_RCC_GPIO | RCC_APB2Periph_AFIO, ENABLE);
   /* Enable USART clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
   Usart1InitVariables();
   //初始化管脚
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
   GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;                     //Rx上拉输入
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(EU_RX_GPIO, &GPIO_InitStructure);
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                     //Tx推挽复用输出 GPIO_Mode_AF_PP
   GPIO_Init(EU_TX_GPIO, &GPIO_InitStructure);
#ifdef UART_GPIO_REMAP_ENABLE
   GPIO_PinRemapConfig(UART_GPIO_REMAP, ENABLE);
#endif
   USART_DeInit(EXT_UART2);
   USART_InitStructure.USART_BaudRate = EXUART_BAUD_RADE;
   USART_InitStructure.USART_WordLength = USART_WordLength_8b;
   USART_InitStructure.USART_StopBits = USART_StopBits_1;
   USART_InitStructure.USART_Parity = USART_Parity_No;
   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
   USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
   USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
   USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
   USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
   USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
   USART_ClockInit(EXT_UART2, &USART_ClockInitStructure);
   USART_Init(EXT_UART2, &USART_InitStructure);
//   USART_ITConfig(EXT_UART, USART_IT_RXNE, ENABLE);//??????,????? ??????????
   // Enable the USARTx
   USART_Cmd(EXT_UART2, ENABLE);
   //DMA配置(须放到UART初始化之后)
   UART2_DMAConfiguration();
}
void UART2_CheckReceive(void)
{
   int32_t DMACnt = 0;
   int32_t MaxDataLen = EUART_RX_BUF_SIZE;
   //如果正在往发送队列中添加数据,退出
   if(m_bEUARTPushingFrms)
      return;
   //判断是否正在Check
   if(m_bEUARTCheckingRec)
      return;
   m_bEUARTCheckingRec = 1;
   if(UART2_RX_DMA_CH->CNDTR == 0)
   {
      m_bEUARTCheckingRec = 0;
      return;
   }
   DMACnt = EUART_RX_BUF_SIZE - (UART2_RX_DMA_CH->CNDTR);
   while( m_EUART_DMA_RXPtr != DMACnt && MaxDataLen > 0)
   {
      Usart1ParseDataCallback(m_EUART_DMA_RXBuf[m_EUART_DMA_RXPtr]);
      delay_us(10);
      m_EUART_DMA_RXPtr++;
      if( m_EUART_DMA_RXPtr >= EUART_RX_BUF_SIZE )
      {
         m_EUART_DMA_RXPtr = 0;
      }
      DMACnt = EUART_RX_BUF_SIZE - (UART2_RX_DMA_CH->CNDTR);
      MaxDataLen--;
   }
   m_bEUARTCheckingRec = 0;
}