求大神指點一下用74hc595和中斷驅動一位數碼管；幫忙給看下萬分感謝

ID:519743 · 發表于 2020-10-25 11:56

求大神指點一下用74hc595和中斷驅動一位數碼管；  幫忙給看下  萬分感謝
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit CP = P2^0;
sbit DA = P2^1;
sbit LE = P2^2;
uchar sec,a,b;
uchar code seg[] = {
0xc0, 0xf9, 0xa4, 0xb0, 0x99,
0x92, 0x82, 0xf8, 0x80, 0x10};
uchar dis_buff[1] = {0};
void write_595(uchar dat)//д??595
{
uchar i;
for(i = 0; i < 8; i++) {
   DA = dat & 0x80;
CP = 0;
   CP = 1;
dat <<= 1;
}
}
void update(uchar sec) //
{
dis_buff[0] =seg[sec];    // sec ????1????????????????
}
void display()
{
  write_595(dis_buff[0]);  //dis_buff[0] ?е????  ????write_595;
  LE = 0;
  LE = 1;    //?????????????
}

void timer0_isr() interrupt 1 //?ж??????????
{
TMOD = 0X01;
TH0 = 0x4c;
EA = 1;
ET0 = 1;
TR0 = 1;
a++;
if(a%5==0)
{
b = ~b;
update(); //??sec ????dis_buff[0]?У? ???磺sec = 1?  ??浽dis_buff[0]???У?
}    //???
if(a == 20)
  {
  display(); //dis_buff[0] ?е????  ????write_595;
   a = 0;
sec++;
}
if(sec==9) sec = 0;
}

void timer0_init(void)
{
TMOD = 0x01;//T0??????1
TH0 = 0x4c; //50ms@11.0592MHz
EA = 1;
ET0 = 1;
TR0 = 1;
}

void  main()
{
tiemr0_init();
while(1);
}

ID:213173 · 發表于 2020-10-26 08:19

贅句多，語句順序不當。給你整理后運行正常。你仔細對比一下就能明白問題所在。

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit CP = P2^0;
sbit DA = P2^1;
sbit LE = P2^2;
uchar sec,a;
uchar code seg[] = {
0xc0,0xf9,0xa4,0xb0,0x99,
0x92,0x82,0xf8,0x80,0x90};
void write_595(uchar dat)
{
uchar i;
for(i = 0; i < 8; i++)
{
DA = dat&0x80;
CP = 0;
CP = 1;
dat <<= 1;
}
LE = 0;
LE = 1;
}
void timer0_isr() interrupt 1
{
TH0=0x4c;
TL0=0x00;
a++;
if(a == 20)
{
a = 0;
sec++;
}
if(sec>9) sec = 0;
write_595(seg[sec]);
}
void timer0_init(void)
{
TMOD = 0x01;
TH0 = 0x4c; //50ms@11.0592MHz
TL0 = 0x00;
EA = 1;
ET0 = 1;
TR0 = 1;
}
void main()
{
timer0_init();
while(1);
}

復制代碼

ID:519743 · 發表于 2020-10-26 11:24

wulin 發表于 2020-10-26 08:19
贅句多，語句順序不當。給你整理后運行正常。你仔細對比一下就能明白問題所在。

好的謝謝我先看一下。

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求大神指點一下 用74hc595和中斷驅動 一位數碼管； 幫忙給看下 萬分感謝

求大神指點一下用74hc595和中斷驅動一位數碼管；幫忙給看下萬分感謝