使用单片机+数码管制作的计时器proteus仿真和源程序

ID:204393 · 发表于 2017-5-24 17:49

使用单片机+数码管制作的计时器proteus仿真和源程序

单片机源程序如下:

/********************************************************************/
/********************************************************************/
/***** *****/
/***** L A B C E N T E R E L E C T R O N I C S *****/
/***** *****/
/***** LABCENTER INTEGRATED SIMULATION ARCHITECTURE *****/
/***** *****/
/***** Tasks Processes *****/
/***** *****/
/********************************************************************/
/********************************************************************/
#include <reg52.h>
#include "cext.h"
char num[ ] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; // 7-seg codes
char add[ ] = {0x0fe,0x0fd,0x0fb,0x0f7}; // Multiplexing address
char dpn[ ] = {0,0,0,0}; // Dots matrix
char buf[ ] = {0,0,0,0}; // Counter buffer
char alm[ ] = {0,0,0,0}; // Alarm sets buffer
char value, key_mask, new_key;
static uchar d0, d1, d2, d3, d5;
static uchar flag;
static uchar digit_counter;
static char set_flag;
static char set_count;
static char set_alm;
static char stop_counter = true;
char un, th;
uint timer;
uint alarm;
uchar del;
// P2.7. Alarm output
sbit alm_out = P2^7;
// processor switch contest.
#pragma registerbank (1)
// Multiplexing Task. Do it every 10ms
void led_mux ()
{ if (!set_flag)
{ // Normal counting. Display the counts.
value = buf[digit_counter];
P1 = num[value] | dpn[digit_counter] ;
}
else
{ // Display alarm values
value = alm[digit_counter];
P1 = num[value] | dpn[digit_counter] ;
}
if (set_alm)
{ // Timer and alarm value
timer = buf[0] * 1000 + buf[1] * 100 + buf[2] * 10 + buf[3];
alarm = alm[0] * 1000 + alm[1] * 100 + alm[2] * 10 + alm[3];
// Check whether the alarm condition is occured or not
if ((alarm - timer) <= 0)
{ alm_out = false; // Make alarm out low.
stop_counter = true ; // Stop the counter.
}
}
// Drive the digit actually multiplexed.
P0 = add[digit_counter];
for (del=0; del<100; del++) ;
// Increase multiplexer address to the next digit
digit_counter++ ;
// Did you diplay all digit ?
if (digit_counter >= 4)
// Start again.
digit_counter = 0;
// Pulse high P0.0, P0.1, P0.2 and P0.3
P0 = P0 | 0x0f;
}
// Blink on and off the dots when counting and alarm is on.
void blink_dp ()
{ if (!set_flag && !stop_counter)
{ if (flag)
dpn[1] = 0x80;
else
dpn[1] = 0x0;
flag = !flag;
}
}
// Counter. Counts from 00.00 to 59.59 min.sec.
// The Timer interrupt is driven every 1 sec.
void led_counter ()
{ if (!stop_counter) buf[3]++;
if (buf[3] > 9)
{ buf[3] = 0;
d3 = true;
}
if (d3)
{ ++buf[2];
d3 = false;
}
if (buf[2] > 5)
{ buf[2] = 0;
d2 = true;
}
if (d2)
{ ++buf[1];
d2 = false;
}
if (buf[1] > 9)
{ buf[1] = 0;
d1 = true;
}
if (d1)
{ ++buf[0];
d1 = false;
}
if (buf[0] > 5)
{ buf[0] = 0;
d0 = true;
}
}
// Four keys Task manager.
// Timer interrupt driven every 250ms
void get_key ()
{ char valid_key;
char delay = 127;
key_mask = P0 & 0xf0;
while (--delay >= 0) ;
valid_key = P0 & 0xf0;
if (key_mask != valid_key) valid_key = 0;
while ((P0 & 0xf0) != (0 | (valid_key & 0x40))) ;
switch (valid_key)
{ case 0x10: // Reset Timer
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
alm_out = true;
stop_counter = !stop_counter;
break;
case 0x20: // Set alarm
++set_count;
if (set_count == 1)
{ // First time SET is pressed. Sets seconds
set_flag = true;
dpn[0] = 0; dpn[1] = 0; dpn[2] = 0x80; dpn[3] = 0x80;
}
else if (set_count == 2)
{ // Second time SET is pressed. Set minutes
set_flag = true;
dpn[0] = 0x80; dpn[1] = 0x80; dpn[2] = 0; dpn[3] = 0;
}
else if (set_count == 3)
{ // Latest time SET is pressed. Return to timer functions.
set_flag = false;
set_count = 0;
dpn[0] = 0; dpn[1] = 0; dpn[2] = 0; dpn[3] = 0;
}
un = 0;
th = 0;
break;
case 0x40: // Set seconds/minutes
if (set_count == 1)
{ ++un;
if (un > 9)
{ th++;
un = 0;
if(th > 5)
th = 0;
}
alm[3] = un;
alm[2] = th;
}
……………………
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8051 Timer with LCD.zip (54.22 KB, 下载次数: 23)

ID:35873 · 发表于 2017-6-16 02:04

不错啊多谢分享

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