1

zhyinch

2021-04-06 246d94e2de20b12287f48f40b750697c33222c91

 Ô´Âë/ºËÐÄ°å/Src/OnChipDevices/Usart.c

@@ -12,7 +12,7 @@
//DMA数据接收缓存
uint8_t m_EUART_DMA_RXBuf[EUART_RX_BUF_SIZE];         //DMA数据接收缓存
volatile int32_t m_EUART_DMA_RXPtr = 0;               //当前数据地址
u16 DMA_rxtemp = 0;                                             //当前数据地址缓存
int16_t DMA_rxtemp = 0,DMA_rxtemp2 = 0;                                             //当前数据地址缓存
u16 datadelaycount = 0;                                       //剩余1位数据延时等待处理
//标志变量
volatile uint8_t m_bEUARTPushingFrms = 0;            //正在往发送队列存数据
@@ -86,7 +86,7 @@
   
   //初始化管脚
   GPIO_InitStructure.GPIO_Pin = EU_RX_PIN;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;                     //Rx上拉输入
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;                     //Rx上拉输入
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(EU_RX_GPIO, &GPIO_InitStructure);
   
@@ -124,7 +124,8 @@
   UART_DMAConfiguration();
   
}

u8 overrun_flag=0;
u16 t1,t2,t3,t4;
void UART_CheckReceive(void)
{
   int32_t DMACnt = 0;
@@ -151,31 +152,39 @@
   if(DMACnt!=m_EUART_DMA_RXPtr)
   {
      //DMA有未处理数据
      DMA_rxtemp=m_EUART_DMA_RXPtr;
      DMA_rxtemp++;
      DMA_rxtemp=m_EUART_DMA_RXPtr+1;
      delay_us(10);
      overrun_flag=0;
      if( DMA_rxtemp >= EUART_RX_BUF_SIZE )
      {
         DMA_rxtemp = 0;
      }
      DMACnt = EUART_RX_BUF_SIZE - (EUART_RX_DMA_CH->CNDTR);//DMACnt是DMA通道接收到数据总长度,CNDTR是dma剩余未使用数量
      if(DMACnt!=DMA_rxtemp)
      if(DMACnt!=DMA_rxtemp&&(cmd_mode==0))
      {
         //DMA有超过2位数据未处理
         DMA_rxtemp = 0;//清空数组指针
         datadelaycount = 0;//等待次数清零
         buftemp1 = m_EUART_DMA_RXBuf[m_EUART_DMA_RXPtr];
         buftemp2 = m_EUART_DMA_RXBuf[m_EUART_DMA_RXPtr+1];
         if((buftemp1==0x55)&&(buftemp2==0xAA)&&(cmd_mode==0))
         if((buftemp1==0x55)&&(buftemp2==0xAA))
         {
            //私有协议
            cmd_mode = 1;
         }
         else if((buftemp1==RS485_Addr)&&(cmd_mode==0))
         else if(buftemp1==RS485_Addr)
         {
            if((buftemp2==03)||(buftemp2==06)||(buftemp2==16))//功能码正确
            {
               //modubs协议
               t1++;
               cmd_mode=2;
               DMA_rxtemp2=m_EUART_DMA_RXPtr+7;
               if( DMA_rxtemp2 >= EUART_RX_BUF_SIZE-1 )
                  {
                     DMA_rxtemp2 -= EUART_RX_BUF_SIZE;
                     overrun_flag=1;
                  }
            }
            else
            {
@@ -205,6 +214,7 @@
            if(++datadelaycount > WAITDELAYCOUNT)
            {   //超出等待次数
               datadelaycount = 0;
               cmd_mode=0;
               m_EUART_DMA_RXPtr++;
               if( m_EUART_DMA_RXPtr >= EUART_RX_BUF_SIZE )
               {
@@ -230,9 +240,10 @@
      else if(cmd_mode==2)
      {
         //modbus协议
         delay_ms(1);//等待数据接收完成
         DMACnt = EUART_RX_BUF_SIZE - (EUART_RX_DMA_CH->CNDTR);		
         while(m_EUART_DMA_RXPtr != DMACnt && MaxDataLen > 0)
         delay_ms(10);//等待数据接收完成
         DMACnt = EUART_RX_BUF_SIZE - (EUART_RX_DMA_CH->CNDTR);	
      if((overrun_flag==0&&DMACnt>DMA_rxtemp2)||(overrun_flag==1&&DMACnt<DMA_rxtemp&&DMACnt>DMA_rxtemp2))			
      {   while(m_EUART_DMA_RXPtr != DMACnt && MaxDataLen > 0)
         {
            RS485_RX_BUFF[i] = m_EUART_DMA_RXBuf[m_EUART_DMA_RXPtr];
            m_EUART_DMA_RXPtr++;
@@ -249,7 +260,9 @@
//         {
//            m_EUART_DMA_RXPtr = 0;
//         }
            RS485_Service();				
         t2++;
            RS485_Service();	
      }			
         }            
      }

@@ -282,6 +295,7 @@
         {
            OUT485_DISABLE;
            m_bEUARTTxEn = 0;
            t3++;
//            temp32 = GPIOC->CRH;         //C10悬空输入
//            temp32 &= ~(0x00000000F<<8);      
//            temp32 |= (0x000000004<<8);
@@ -291,10 +305,17 @@
      m_bEUARTCheckingSend = 0;
      return;
   }
    OUT485_ENABLE;
	
   if(!m_bEUARTTxEn)
   {
      m_bEUARTTxEn = 1;
       OUT485_ENABLE;
      t4++;
      #ifdef BAUDRATE_19200
      delay_us(500);
      #else
      delay_us(10);
      #endif
//      temp32 = GPIOC->CRH;         //C10复用推挽输出
//      temp32 &= ~(0x00000000F<<8);
//      temp32 |= (0x000000009<<8);