KEIC的模拟串口收发问题

只看该作者 · 2012-8-15 15:00

在用keil C模拟串口接收GPS数据并发送给PC时发现问题：
例如：（接收，串口1,9600波特率）
$GPGGA,040002.000,3117.3760,N,12139.6764,E,1,07,2.2,41.7,M,8.4,M,,0000*5E
$GPGSA,A,3,30,16,21,07,06,13,23,,,,,,2.8,2.2,1.8*34
$GPGSV,3,1,12,06,81,063,36,16,56,013,43,23,48,262,31,30,39,053,46*72

（发送，串口0,1200波特率）
040002.000,3117.3760,N,12139.6764,E,1,07,2.2,41.7,M,8.4,M,,0000*5E
即只发送GPGGA（第一行）后的数据
但实际却在PC上看到：
PGSV,3,2,12,13,33,304,35,21,13
PGSV,3,3,12,25,36,320,,03,29,2
PGGA,040002.000,3117.3760,N,12
......

现将主要程序贴上，求各位大爷给点意见（PS：  Init_Device()中各初始化均由SILICON软件配置，无问题）：
void Uart1_ISR(void) interrupt 20
//中断接收Uart1
{
  if((SCON1&0x01) == 0x01)
//RI_1=1
  {

SCON1 = (SCON1&0xFE);
//RI_1=0
king = SBUF1;

EA = 0;

if((come == 1)&&(come1 == 0))

{

  Address[d] = king;

  d = d+1;

  if(d == 4)  d = 0;

  if(Address[3] == 'G')

  { come = 0,come1 = 1;}

  }

else if((come1 == 1)&&(come == 0))

{

  GPS[e] = king;

  e = e+1;

  if(e == 45)

  {e = 0,flag = 1,come = 0,come1 = 0;}

  }

else if(king == '$') {come = 1,come1 = 0;}

EA = 1;

}
  }

void main(void)
{
  WDTCN = 0xDE;
      //关狗
  WDTCN = 0xAD;
  Init_Device();
  EIE2  = 0x40;
  //开启串口1中断，即ES1=1
  IE = 0x80;
  //开总中断，即EA=1
  while(1)
  {

if(flag == 1)

{

  EA = 0;

  flag = 0;

  neg  = 1;

  for(a = 0;a < 45;a++)

  {

SBUF0 = GPS[a];
  //查询发送Uart0
      while(!TI0);
      TI0 = 0;
      Delay(10);

}

  neg = 0;

  Delay(300);

  EA  = 1;

  }

}
  }