下降沿中斷打開定時器計算每兩個下降沿的時間

ID:191710 · 發(fā)表于 2018-6-27 09:45

下降沿中斷打開定時器計算每兩個下降沿的時間。
void exint0_init()
{

IT0=1;
EX0=1;
}

void exint0_interrupt() interrupt 0
{

TR0 = 0;
SBUF=count_time;
count_time=0;
TR0 = 1;
}

void timer0_init()
{
//16us進入一次中斷
AUXR |= 0x80;
TMOD &= 0xF0;
TL0 = 0x4F;
TH0 = 0xFF;
TF0 = 0;
ET0=1;
}

void timer0_interrupt() interrupt 1
{

count_time++;
if(count_time>=96)
{
TR0 = 0;
}
}

但是通過串口接收的數(shù)據(jù)發(fā)現(xiàn)不正確。有高手可以告訴我問題嗎？

ID:191710 · 發(fā)表于 2018-6-27 09:47

00 10 00 F9 0E 40 00 40 00 20 00 00 00 00 40 40 00 10 00 00 00 20 00 00 20 00 00 10 00 A0 21 30 20 40 00 10 00 00 00 00 00 40 40 20 01 00 00 00 00 30 00 00 40 20 00 20 00 00 40 0F 41 00 20 00 00 00 00 41 40 00 00 00 00 08 20 00 00 20 00 20 00 21 00 00 00 00 40 10 00 00 00 00 00 00 40 41 00 00 00 00 00 60 00 00 40 20 00 60 00 00 40 00 40 00 01 00 00 00 00 00 40 40 20 00 00 00 00 00 F1 01 00 00 20 00 60 00 00 00 00 40 00 21 00 00 00 00 40 40 01 00 00 00 00 A0 1F 00 20 00 20 00 A0 00 00 00 00 40 00 10 00 00 00 00 00 40 40 01 00 00 00 00 60 1F 00 40 20 00 60 00 0F 40 00 40 00 10 00 00 00 00 00 40 40 20 00 00 00 00 00 F1 01 00 00 20 00 60 00 00 00 00 40 01 20 00 00 00 00 40 41 00 00 00 10 00 20 00 00 20 40 20 00 A0 00 1F 00 00 40 01 00 01 00 01 20 21 40 43 43 60 73 93 70 93 8C 8F 70 9E 53 73 4C 60 C8 48 CF 5F 60

這是串口接收的數(shù)據(jù)，不正確。

ID:360343 · 發(fā)表于 2018-6-27 15:54

這是串口接收的數(shù)據(jù)，不正確。

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下降沿中斷打開定時器計算每兩個下降沿的時間