在原理圖基礎上添加蜂鳴器怎么修改電路以及單片機代碼?

ID:1125014 · 發表于 2025-12-21 14:18

在原圖基礎上添加蜂鳴器，運行完蜂鳴器報警，代碼：

#include <reg52.H>#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit LCD_RS = P2^0;
sbit LCD_RW = P2^1;
sbit LCD_EN = P2^2;
#define LCD_DATA P0
void delayms(unsigned int x);
uint key(void);
void deplay(uchar j_p);
void deplay_s(long a);
void lcd_wcmd(uchar cmd);
void lcd_wdat(uchar dat);
void lcd_init(void);
void lcd_clr(void);
void show_error(void);
long a = 0, b = 0;
uchar flat = 0;
bit neg_flag = 0;
void delayms(unsigned int x)
{
uchar i;
while(x--)
{
for(i = 0; i < 120; i++);
}
}
void lcd_wcmd(uchar cmd)
{
LCD_RS = 0;
LCD_RW = 0;
LCD_DATA = cmd;
delayms(1);
LCD_EN = 1;
delayms(1);
LCD_EN = 0;
}
void lcd_wdat(uchar dat)
{
LCD_RS = 1;
LCD_RW = 0;
LCD_DATA = dat;
delayms(1);
LCD_EN = 1;
delayms(1);
LCD_EN = 0;
}
void lcd_init(void)
{
delayms(10);
lcd_wcmd(0x38);
lcd_wcmd(0x0c);
lcd_wcmd(0x06);
lcd_wcmd(0x01);
delayms(2);
}
void lcd_clr(void)
{
lcd_wcmd(0x01);
delayms(2);
lcd_wcmd(0x80);
neg_flag = 0;
}
void show_error(void)
{
lcd_clr();
lcd_wdat('e');
lcd_wdat('r');
lcd_wdat('r');
lcd_wdat('o');
delayms(1000);
lcd_clr();
a = 0; b = 0; flat = 0; neg_flag = 0;
}
uint key(void)
{
uchar h = 0, l = 0;
uchar j_p = -1;
P1 = 0x0f;
if(P1 != 0x0f)
{
delayms(5);
if(P1 != 0x0f)
{
l = P1 & 0x0f;
P1 = 0xf0;
delayms(2);
h = P1 & 0xf0;
switch(l | h)
{
case 0x7e: j_p = 0; break;
case 0x7d: j_p = 1; break;
case 0x7b: j_p = 2; break;
case 0x77: j_p = 3; break;
case 0xbe: j_p = 4; break;
case 0xbd: j_p = 5; break;
case 0xbb: j_p = 6; break;
case 0xb7: j_p = 7; break;
case 0xde: j_p = 8; break;
case 0xdd: j_p = 9; break;
case 0xdb: j_p = '+'; break;
case 0xd7: j_p = '-'; break;
case 0xee: j_p = '='; break;
case 0xed: j_p = '*'; break;
case 0xeb: j_p = '/'; break;
case 0xe7: j_p = 'c'; break;
case 0xec: j_p = '±'; break;
default: j_p = -1; break;
}
P1 = 0x0f;
while(P1 != 0x0f)
{
delayms(1);
}
}
}
return j_p;
}
void deplay(uchar j_p)
{
if(j_p != -1)
{
if(j_p >= 0 && j_p <= 9)
{
j_p += 48;
}
lcd_wdat(j_p);
}
}
void deplay_s(long a)
{
int n[20] = {0};
uint i = 0;
bit is_neg = 0;
if(a < 0)
{
is_neg = 1;
a = -a;
}
if(a == 0)
{
deplay(0);
return;
}
while(a)
{
n[i] = a % 10;
a /= 10;
i++;
}
if(is_neg)
{
lcd_wdat('-');
}
while(i > 0)
{
deplay(n[--i]);
}
}
void main(void)
{
uchar jp = -1;
delayms(20);
lcd_init();
lcd_clr();
while(1)
{
jp = -1;
while(jp == -1)
{
jp = key();
}
if(jp == 'c')
{
a = 0;
b = 0;
flat = 0;
neg_flag = 0;
lcd_clr();
jp = -1;
continue;
}
if(jp != '±')
{
deplay(jp);
}
switch(jp)
{
case '=':
switch(flat)
{
case '+': a = b + a; break;
case '-': a = b - a; break;
case '*': a = (long)b * a; break;
case '/':
if(a != 0)
a = b / a;
else
show_error();
break;
default: break;
}
deplay_s(a);
neg_flag = 0;
break;
case '+': flat = '+'; b = a; a = 0; neg_flag = 0; break;
case '-': flat = '-'; b = a; a = 0; neg_flag = 0; break;
case '*': flat = '*'; b = a; a = 0; neg_flag = 0; break;
case '/': flat = '/'; b = a; a = 0; neg_flag = 0; break;
case '±':
neg_flag = !neg_flag;
a = -a;
lcd_clr();
deplay_s(a);
break;
case 0: case 1: case 2: case 3: case 4:
case 5: case 6: case 7: case 8: case 9:
if(!neg_flag && a >= 100)
{
show_error();
break;
}
if(neg_flag && a <= -100)
{
show_error();
break;
}
if(neg_flag)
{
a = a * 10 - jp;
}
else
{
a = a * 10 + jp;
}
break;
default: break;
}
jp = -1;
}
}

復制代碼

ID:235200 · 發表于 2025-12-21 16:25

你這個運行完就沒有描述清楚，單片機程序是循環運行的，永遠不會運行完成，只是在運行時不斷檢測狀態的變化，加上蜂鳴器報警，報什么警呢？也許你想的情況是單片機不運行了（死機）報警，而報警也是只有單片機運行時才能報警（控制蜂鳴器的驅動電流發生變化），所以你這樣的問題無解

ID:1159343 · 發表于 2025-12-22 08:08

應該是按鍵有輸入時蜂鳴器響一下吧，拿一個輸出口接蜂鳴器，程序里檢測到按鍵有動作就給蜂鳴器一個短時間的信號。

ID:1125014 · 發表于 2025-12-22 15:04

不用了，我自己昨天改完了

ID:584814 · 發表于 2025-12-22 15:52

mjnwlp 發表于 2025-12-22 15:04
不用了，我自己昨天改完了

是猴子派來一逗13的么

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在原理圖基礎上添加蜂鳴器 怎么修改電路以及單片機代碼?

在原理圖基礎上添加蜂鳴器怎么修改電路以及單片機代碼?