数码管十位显示微弱，个位显示正常。是什么原因？

只看该作者 · 2016-7-13 17:29

你把刷新和计算显示数据分开不然的话3个数码管点亮时间不一致会导致亮度不一致

只看该作者 · 2016-7-13 18:49

shcshc1234 发表于 2016-7-13 17:29
你把刷新和计算显示数据分开不然的话3个数码管点亮时间不一致会导致亮度不一致
...

#include <msp430.h>
#define uchar unsigned char
#define uint unsigned int
uchar duan[]={0xc0,0xf9,0xa4,0xb0, 0x99,0x92,0x82,0xf8,
      0x80,0x90,0x88,0x83, 0xc6,0xa1,0x86,0x8e};
uchar num=0,ge,shi;

void delay(uint x)
{
uint y,z;
for(y=x;y>0;y--)
for(z=12000;z>0;z--);
}

void main(void)
{

WDTCTL = WDTHOLD + WDTPW ;
P6DIR |= 0xff;
P2DIR |= BIT4+BIT5;
P2DS  |= BIT4;

TA0CCTL0 = CCIE;                /* Capture/compare interrupt enable */
TA0CCR0  = 32768;
TA0CTL=TASSEL_1+MC_1;
_BIS_SR(GIE);
while(1)
{

shi=num/10;
P6OUT  =  duan[shi];
P2OUT &=~ BIT4;
P2OUT  |=  BIT5;
//delay(200);

ge=num%10;
P6OUT = duan[ge];
P2OUT  &=~  BIT5;
P2OUT  |= BIT4;
//delay(200);

}

}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void)
{
num++;
if(num==99)
{
num=0;
}

}