在proteus中仿真数码管,在12m晶振时,数码管的第四个不显示, 4m晶振时,数码管都显示,但是闪烁。。。。。。
下周板子回来后,用板子实验。。。。。。
感觉程序应该没什么问题。。。。。
就是每10ms在定时中断中调用显示函数Dis();
#include <pic.h>
#include "delay.h"
unsigned char tick;
unsigned char sec;
const unsigned char num_code[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xC6};
unsigned char dis_buf[4]={1,2,3,5};
unsigned int ad_result[8];
__CONFIG( HS & WDTDIS& PWRTEN& BORDIS& UNPROTECT );
interrupt ISR()
{
if(TMR1IF&&TMR1IE)
{
TMR1IF=0;
TMR1H=(65526-83000/3)/256;
TMR1L=(65526-83000/3)%256;//11.0592M 10.017MS
tick++;
if(tick>=100)
{
tick=0;
sec++;
dis_buf[2]=sec%10;
dis_buf[1]=(sec%100)/10;
dis_buf[0]=sec/100;
}
Dis();//显示
}
}
Init_Tmr1()
{
PEIE=1;
TMR1IF=0;
TMR1IE=1;
T1CKPS1=0;
T1CKPS0=0;
TMR1CS=0;
TMR1H=(65526-83000/3)/256;
TMR1L=(65526-83000/3)%256;//11.0592M 10.017MS
TMR1ON=1;
}
Init_Dis()
{
TRISC0=0;
TRISC1=0;
TRISC2=0;
TRISC3=0;//BIT
TRISB=0X0;
PORTB=0XFF;
}
Dis()
{
static unsigned char step=3;
switch(step){
case 0:
RC0=0;
RC1=1;
RC2=1;
RC3=1;
PORTB=num_code[dis_buf[0]];
break;
case 1:
RC0=1;
RC1=0;
RC2=1;
RC3=1;
PORTB=num_code[dis_buf[1]];
break;
case 2:
RC0=1;
RC1=1;
RC2=0;
RC3=1;
PORTB=num_code[dis_buf[2]];
break;
case 3:
RC0=1;
RC1=1;
RC2=1;
RC3=0;
PORTB=num_code[dis_buf[3]];
break;
default: break;
}
step++;
if(step>=4)
step=0;
}
void Ad_Init(void)
{
ADCON1=0X80;//right ,all pin analog
ADCS1=1; ADCS0=0;//F_OSC/32
TRISA0=1;
TRISA1=1;
TRISA2=1;
TRISA3=1;
TRISA5=1;
TRISE|=0X07;
ADON=1;//AD MODULE WORK
}
unsigned int Ad_Convert(unsigned char ch)
{
unsigned int ad_result;
Ad_Init();
if(ch<=7)
{
ADCON0&=~(7<<3);
ADCON0|=ch<<3;
}
DelayUs(20);
ADGO=1;
for(ad_result=0;ad_result<1000;ad_result++)
{
if(ADGO==0)
break;
}
DelayMs(1);
ad_result=ADRESH&0XFF;
ad_result=ad_result<<8;
ad_result=ad_result+ADRESL;
return ad_result;
}
main()
{
unsigned char i=0;
Ad_Init();
Init_Tmr1();
Init_Dis();
GIE=1;
while(1)
{
for (i=0;i<8;i++)
ad_result=Ad_Convert(i);
}
}
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as to dis(), you can set up a software flag in the isr() so that every 10ms, that flag is set by the isr() and in the main loop, you run dis() which checks the flag. if that flag is up, it clears that flag and then does its thing. aka create a "software" interrupt of your own for dis() but outside of the real isr().
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