P24FJ256GB106用定时器中断写延时函数，有没有大佬看一下哪里错了，感觉死在了循环里

只看该作者 · 2019-11-6 18:40

void Delay_us(unsigned long delay)
{
T5CON=0;
T4CON=0;
TMR5=0;
TMR4=0;
if(delay>65536)
{
      PR5 = (unsigned int)(delay>>16);
      PR4 = (unsigned int)delay;
}
else
{
      PR4 = (unsigned int)delay;
}
_T5IP=0x01;
_T5IF=0;
_T5IE=1;
T4CON=0x8008;
while(!_T5IF){;}
_T5IF=0;
}

只看该作者 · 2019-11-6 19:07

已经跑通了，else里PR5没赋为0，还得禁止中断，为什么延时函数禁止中断后就能跑通了呢

只看该作者 · 2019-11-6 19:07

void Delay_us(unsigned long delay)
{
T5CON=0;
T4CON=0;
TMR5=0;
TMR4=0;
PR5 = (unsigned int)(delay>>16);
PR4 = (unsigned int)delay;
_T5IP=0x01;
_T5IF=0;
_T5IE=0;
T4CON=0x8008;
while(!_T5IF){;}
_T5IF=0;
}