#include "common.h"

byte RTBuf[MAX_COM_BUF_SIZE];//串口緩沖區(qū)
fastram byte RTFlag,         //串口狀態(tài)標(biāo)志
             RTLen,          //串口數(shù)據(jù)長(zhǎng)度
             RTPtr;          //串口收發(fā)指針

//串口發(fā)送
void ComSend()
{
  if(RTPtr < RTLen)          //數(shù)據(jù)未發(fā)完
  {
    WriteCom(RTBuf[RTPtr]);  //發(fā)送下一個(gè)字節(jié)
    RTPtr++;
  }
  else
  {
    StopComSend();           //停止發(fā)送
    RTFlag = 0;              //設(shè)置接收標(biāo)志
  }
}

//串口接收
void ComReceive(byte dat)
{
  //正在處理數(shù)據(jù)中，不再接收
  if (RTFlag > 1)
  {
    return ;
  }

  if (RTFlag == 0)
  {
    if (dat == FRAMEHEAD)  //收到幀頭
    {
      RTBuf[0] = FRAMEHEAD;
      RTPtr = 1;
      RTFlag = 1;
      RTLen = 5;
    }
    return ;
  }
  else
  {

    RTBuf[RTPtr] = dat;
    RTPtr++;
    if (RTPtr >= RTLen)//接收到足夠數(shù)據(jù)
    {
      RTFlag = 2;
      return ;
    }
    if (RTPtr >= MAX_COM_BUF_SIZE)//意外處理命令超長(zhǎng)

    {
      RTFlag = 0;
      return ;
    }
  }
  
}

//串口分析
void ComAnalyse()
{

  if(RTFlag != 2)return;
  if(RTBuf[2] != 0x35)
  {
    RTFlag = 0;
    return;
  }

  RTFlag = 3;
  switch(RTBuf[1])
  {
     case 0x31:
       P0 = 1;
       break;
     case 0x32:
       P0 = 2;
       break;
     case 0x33:
       P0 = 3;
       break;
     default:
       RTFlag = 0;
       return;
  }
  RTBuf[1] = RTBuf[1] + 0x80;
  RTBuf[5] = RTBuf[4] + 1;
  RTBuf[6] = RTBuf[4] + 2;
  RTBuf[7] = RTBuf[4] + 3;
  RTLen = 8;
  RTPtr = 0;
  LED = !LED;    //發(fā)送數(shù)據(jù)指示
  StartComSend();//啟動(dòng)發(fā)送
}