pwm.c.120731135702

atmega128串行操作lcd12864

#include<iom128v.h>
#define uint unsigned int
uint pwm1=500,pwm2=500;
void int_io(void)
{
TCCR1A=0XFF;//三通道
TCCR1B=0X0A;//8分频   0x09不分频
TCNT1=0X0000;
TIMSK=0X00;
ETIMSK=0X00;
DDRB=0XFF;
OCR1A=pwm1;
OCR1B=pwm2;
}
void main(void)
{
DDRA=0XFF;
PORTA=0XFF;
DDRD=0X00;
PORTD=0XFF;
while(1)
{
int_io();
if(PIND==0XFE)
{
pwm1=pwm1-100;
PORTA=0XFE;
}
if(PIND==0XFD)
{
pwm2=pwm2-100;
PORTA=0XFF;
}
if(PIND==0XFB)
{
pwm1=pwm1+100;
}
if(PIND==0XF7)
{
pwm1=pwm1+100;
}
}
}