关于430G2553 IO模拟串口接收问题

daichenghua · 发表于 2020-5-13 15:02:22

现在项目用到430G2553接收3路串口数据，目前使用定时器加外部中断模拟串口，发现3路数据同时发送时，数据会丢失。急需解决。如果用输入捕获来模拟串口，是否可以避免此问题。
模拟串口代码如下：
#include "dev_duart.h"
#include "dev_TimeA1.h"
#include "UserData.h"
#include "dev_key.h"
#include "paramSave.h"
#include "config.h"

  // 模拟串口参数定义
  #define DuartChannelNum       4                      // 模拟串口通道数量
  #define DuartNotEnable       0                      // 模拟串口通道是否反相
  #define DuartBaurdB          128                      // 波特率倍数
  #define DuartReadB             16                      // 读数位置
//8 和6 时为2048波特率 7和4时为2400波特率

#ifndef DuartNotEnable
#error "没有定义DuartNotEnable(通道输入是否反相)"
#endif
#ifndef DuartChannelNum
#error "没有定义DuartChannelNum(通道数量)"
#endif
#ifndef DuartBaurdB
#error "没有定义DuartBaurdB(波特波周期数)"
#endif
#ifndef DuartReadB
#error "没有定义DuartReadB(读数周期数)"
#endif
//通道PIN定义(P2)

#define dUartChannelAll (BIT0|BIT1|BIT3|BIT4)
const uint8_t  dUartChannelTable[DuartChannelNum] = {BIT4,BIT0,BIT1,BIT3};
DUartInfo    dUartInfo[DuartChannelNum];
uint8_t       dUartState;                //打开状态标志(与通道引脚对应)
uint8_t       dUartTimeState;             //定时器打开状态

inline void DUartOpenPinInt(uint16_t channel);
inline void DUartClosePinInt(uint16_t channel);
uint8_t  DuartReadB_buf[3]= {94,95,96};

void TimeA1Init(void)                         //定时30us
{
  TA1CTL = TASSEL_1 | ID_0 | TACLR;          //30.5us/(1000000us/32768)=1
  TA1CCTL0 = CCIE;
  TA1CCR0 = 1;
}

#if TIMEA1_USER_DEF_ENALBE != 1
void TimeA1Open(uint8_t id)
{
  if((id != 0) && timeA1State == 0)
TA1CTL |= MC_1 | TACLR;
  timeA1State |= id;
}

void TimeA1Close(uint8_t id)
{
  timeA1State &= ~id;
  if(timeA1State == 0)
TA1CTL &= ~MC_3;
}
#endif

#pragma vector = TIMER1_A0_VECTOR
__interrupt void Time1IRQ(void)
{
  if((timeA1State & TimeA1DUart) != 0)
if(DUartTime1IRQ())
   LPM3_EXIT;
}

void DUartInit(void)
{
  TimeA1Init();
#if DuartNotEnable == 1
  P2IES &= ~dUartChannelAll;
#else
  P2IES |= dUartChannelAll;    //下降沿中断
#endif
}

void DUartOpen(uint16_t channel)
{
  if((RunParGet()->state & GErrIsAMode) == 0)
  {
if(channel >= DuartChannelNum)
   return;
  }
  else
  {
if(channel >= DuartChannelNum - 1)
   return;
  }
  dUartState |= dUartChannelTable[channel];
  DUartOpenPinInt(channel);
}

void DUartClose(uint16_t channel)
{
}

void DUartOpenTimer(uint16_t channel)
{
  if((dUartTimeState & dUartChannelTable[channel]) != 0)
return;
  dUartTimeState |= dUartChannelTable[channel];
  if(dUartTimeState == dUartChannelTable[channel])
TimeA1Open(TimeA1DUart);
}

void DUartCloseTimer(uint16_t channel)
{
  dUartTimeState &= ~dUartChannelTable[channel];
  if(dUartTimeState == 0)
TimeA1Close(TimeA1DUart);
}

//打开通道引脚中断
inline void DUartOpenPinInt(uint16_t channel)
{
  P2IFG &= ~dUartChannelTable[channel];
  P2IE |= dUartChannelTable[channel];
}

//打开通道引脚中断
inline void DUartClosePinInt(uint16_t channel)
{
  P2IE &= ~dUartChannelTable[channel];
}

void DUartStartReceive(uint16_t channel)
{
  if(channel >= DuartChannelNum)
return;
  dUartInfo[channel].curbit = 0;
  dUartInfo[channel].curTimebit = 0;
  dUartInfo[channel].rdata = 0;
  dUartInfo[channel].rReadyFlag = false;
  DUartOpenTimer(channel);
}

void DUartReadBit(uint16_t channel)
{
  if(channel >= DuartChannelNum)
return;
}

#pragma vector = PORT2_VECTOR
__interrupt void Port2Int(void)
{
  uint8_t num = DuartChannelNum;
  if((RunParGet()->state & GErrIsAMode) != 0)
num --;
  for(uint8_t i = 0;i < num;i++)
  {//检测全部通道
if(P2IFG == 0)
   break;
if((P2IFG & dUartChannelTable[i]) != 0)
{//当前通道产生了中断,开始接收数据
   DUartClosePinInt(i);
   P2IFG &= ~dUartChannelTable[i];
   DUartStartReceive(i);
}
  }
}

bool DUartTime1IRQ(void)
{
  bool flag = false;
  uint8_t PinIn = P2IN;
  uint8_t num = DuartChannelNum;
  if((RunParGet()->state & GErrIsAMode) != 0)
num --;
  for(uint8_t i = 0;i < num;i++)
  {//4个通道的定时
if((dUartTimeState & dUartChannelTable[i]) != 0)
{//该通道已经启动定时器
   dUartInfo[i].curTimebit++;
   if(dUartInfo[i].curTimebit >= DuartBaurdB)
      dUartInfo[i].curTimebit = 0;
   if(dUartInfo[i].curTimebit == DuartReadB)//((DuartBaurdB + 1) >> 1) + 1)
   {//当时为一个位的第5个时钟周期,进行数据的读取
      if(dUartInfo[i].curbit == 9)
      {//读取停止位
#if DuartNotEnable == 1
      if((PinIn & dUartChannelTable[i]) == 0)
#else
      if((PinIn & dUartChannelTable[i]) != 0)
#endif
      {
         dUartInfo[i].rReadyFlag = true;
         flag = true;
         WriteOne(i,dUartInfo[i].rdata);
      }
      dUartInfo[i].curbit = 10;
      DUartCloseTimer(i);
      DUartOpenPinInt(i);
      }
      else
      {//起始位及数据
      dUartInfo[i].rdata >>= 1;
#if DuartNotEnable == 1
      if((PinIn & dUartChannelTable[i]) == 0)
#else
      if((PinIn & dUartChannelTable[i]) != 0)
#endif
         dUartInfo[i].rdata |= 0x80;
      dUartInfo[i].curbit ++;
      }
   }
}
  }
  return flag;
}