用串口调节助手发送字符串，代码如下，但是接收不到，这是为什么呢，波特率没错

ID:501200 · 发表于 2019-4-5 09:36

void InterruptUART() interrupt 4
{
static unsigned int *ptr;
static unsigned int tmr = 0;
static unsigned char i = 0;
static unsigned char cnt = 0;
unsigned char ptm = 20;
if(RI)
{
  while(ptm--)
  {
RI = 0;
RxdByte[i] = SBUF;
i++;
if(i > 6)
{
i = 0;
break;
}
  }
  ptr = RxdByte;
  for(i = 0; i < 6; i++)
  {
if(*ptr >= 'a' && *ptr <= 'z')
{
rest = *ptr;
if(tmr >= 1000)
{
tmr = 0;
ptr = ptr + 1;
}
}
else
continue;
  }
}
if(TI)
{
  if(cnt < 6)
  {
SBUF = RxdByte[cnt];
cnt++; TI = 0;
  }
}
}