key__.c

本资料为基于单片机的AD按键的程序。能用单IO口实现多按键处理

#include <mega32.h>
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x80
	.EQU __sm_mask=0x70
	.EQU __sm_powerdown=0x20
	.EQU __sm_powersave=0x30
	.EQU __sm_standby=0x60
	.EQU __sm_ext_standby=0x70
	.EQU __sm_adc_noise_red=0x10
	.SET power_ctrl_reg=mcucr
	#endif
#include <delay.h>
#include <lcd12864com.h>
#include <KEY.h>

void main(void)
{
uint i=0,j=0,k=0;
LCD12864_init();
key_port();
ADCSRA=0x86; //使能AD，64分频
ADMUX=0x40;//AVCC为参考电压，AREF并联0.1UF电容，PA0为AD输入口
Timer0ForKeyScan_init();

while (1)
      {
                if(KeyEffect)
                {
                        dispint(1,0,KeyEffect);
                        if(KeyEffect==FORWARD)
                                j++;
                        if(KeyEffect==BACKUP)
                                k++;
                        KeyEffect=0;
                        i++;
                }
                i%=30000;
                j%=30000;
                k%=30000;
                dispint(0,0,i);
                dispint(2,0,j);
                dispint(3,0,k);
      };
}