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#include "Reg51.h"
sbit SquOut = P2^0;
char INIT_H_0, INIT_L_0, INIT_H_1, INIT_L_1;
void MySqureOut_T0_ISR(void) interrupt 1 using 1
{
/*TH0 = 0xFE;
TL0 = 0x16;
SquOut ^= 0x01;*/
if (SquOut)
{
TH0 = INIT_H_0;
TL0 = INIT_L_0;
SquOut = 0;
}
else
{
TH0 = INIT_H_1;
TL0 = INIT_L_1;
SquOut = 1;
}/**/
}
void main(void)
{
unsigned int Period, CntH, CntL;
float TempF;
Period = 1;
Period *= 1000; //將其確定為計數(shù)個數(shù)
TempF = 20;
TempF *= Period;
TempF /= 100;
CntH = (int)TempF;
CntL = Period - CntH;
if (CntH > 10)
CntH -= 10;
else
CntH = 1;
CntH = 0xFFFF - CntH;
INIT_H_1 = (CntH >> 8) & 0xFF;
INIT_L_1 = CntH & 0xFF;
if (CntL > 10)
CntL -= 10;
else
CntL = 1;
CntL = 0xFFFF - CntL;
INIT_H_0 = (CntL >> 8) & 0xFF;
INIT_L_0 = CntL & 0xFF;
//初始化
TH0 = 0xFE;
TL0 = 0x0C;
TMOD = 0x01;
ET0 = 1;
EA = 1;
TR0 = 1;
while(1);
}
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9.1 輸出1kHz方波.rar
2016-3-21 08:43 上傳
點擊文件名下載附件
下載積分: 黑幣 -5
38.97 KB, 下載次數(shù): 11, 下載積分: 黑幣 -5
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