剛學習完SG90舵機，特意來分享一下自己寫的一個按鍵控制SG90舵機正轉反轉的源碼。對應著定義的I0口插上就可以用。
#include <reg52.h>
unsigned char count;
sbit pwm =P1^0 ;
sbit jia =P1^4;
sbit jan =P1^5;
unsigned char jd;
void delay(unsigned char i)
{
unsigned char j,k;
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void Time0_Init()
{
TMOD = 0x01;
IE = 0x82;
TH0 = 0xfe;
TL0 = 0x33;
TR0=1;
}
void Time0_Int() interrupt 1
{
TH0 = 0xfe;
TL0 = 0x33;
if(count< jd)
pwm=1;
else
pwm=0;
count=(count+1);
count=count%40;
}
void keyscan()
{
if(jia==0)
{
delay(10);
if(jia==0)
{
jd=2;
delay(200);
jd=3;
}
}
if(jan==0)
{
delay(10);
if(jan==0)
{
jd=4;
delay(200);
jd=3;
}
}
}
void main()
{
jd=3;
count=0;
Time0_Init();
while(1)
{
keyscan();
}
}
歡迎大家多多指點，共同進步。
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