一、使用到的模块
矩阵键盘，数码管，LED，DS18B20，继电器
题目要求
二、代码部分
实验平台：CT107D
实验芯片：stc15f2k60s2
实验现象：完成题目要求
代码如下
keydrive.c
#include<stc15f2k60s2.h>
#include<keydrive.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char keymap[4][4]={{'0','1','2',' '},
{'3','4','5',' '},
{'6','7','8',' '},
{'9',set,clr,' '}};
unsigned char keysta[4][4]={{1,1,1,1},
{1,1,1,1},
{1,1,1,1},
{1,1,1,1}};
void keyscan()
{
uchar i;
static uchar keyout = 0;
static uchar keybuff[4][4]={{0xff,0xff,0xff,0xff},
{0xff,0xff,0xff,0xff},
{0xff,0xff,0xff,0xff},
{0xff,0xff,0xff,0xff}};
switch(keyout)
{
case 0:key_out_1 = 0;key_out_4 = 1;break;
case 1:key_out_2 = 0;key_out_1 = 1;break;
case 2:key_out_3 = 0;key_out_2 = 1;break;
case 3:key_out_4 = 0;key_out_3 = 1;break;
}
keybuff[keyout][0]=keybuff[keyout][0]<<1|key_in_1;
keybuff[keyout][1]=keybuff[keyout][1]<<1|key_in_2;
keybuff[keyout][2]=keybuff[keyout][2]<<1|key_in_3;
keybuff[keyout][3]=keybuff[keyout][3]<<1|key_in_4;
for(i=0;i<4;i++)
{
if((keybuff[keyout][i]&0x0f) == 0x00)
{
keysta[keyout][i] = 0;
}
if((keybuff[keyout][i]&0x0f) == 0x0f)
{
keysta[keyout][i] = 1;
}
}
keyout++;
keyout &= 0x03;
}
void keydrive()//放在主函数不断的判断按键状态是否改变
{
uchar i,j;
static uchar keyback[4][4] = {{1, 1, 1, 1},//备用状态数组
{1, 1, 1, 1},
{1, 1, 1, 1},
{1, 1, 1, 1}};
for(i=0;i<4;i++)
for(j=0;j<4;j++)
{
if(keysta[i][j] != keyback[i][j])
{
if(keysta[i][j] != 0)
{
keyfun(keymap[i][j]);//获取按键值传递给keyfun
}
} keyback[i][j] = keysta[i][j]; //更新状态，方便下一次判断
}
}
keydrive.h
#ifndef __KEYDRIVE_H
#define __KEYDRIVE_H
#define set 0x99
#define clr 0x88
sbit key_out_1 = P3^0;//行扫描
sbit key_out_2 = P3^1;
sbit key_out_3 = P3^2;
sbit key_out_4 = P3^3;
sbit key_in_1 = P4^4;//列扫描
sbit key_in_2 = P4^2;
sbit key_in_3 = P3^5;
sbit key_in_4 = P3^4;
void keyscan(void);
void keyfun(unsigned char key_val);
void keydrive(void);
#endif
onewire.c
#include "stc15f2k60s2.h"
sbit DQ = P1^4; //单总线接口
//单总线延时函数
void Delay_OneWire(unsigned int t) //STC89C52RC
{
t = t*12;
while(t--);
}
//通过单总线向DS18B20写一个字节
void Write_DS18B20(unsigned char dat)
{
unsigned char i;
for(i=0;i<8;i++)
{
DQ = 0;
DQ = dat&0x01;
Delay_OneWire(5);
DQ = 1;
dat >>= 1;
}
Delay_OneWire(5);
}
//从DS18B20读取一个字节
unsigned char Read_DS18B20(void)
{
unsigned char i;
unsigned char dat;
for(i=0;i<8;i++)
{
DQ = 0;
dat >>= 1;
DQ = 1;
if(DQ)
{
dat |= 0x80;
}
Delay_OneWire(5);
}
return dat;
}
//DS18B20设备初始化
bit init_ds18b20(void)
{
bit initflag = 0;
DQ = 1;
Delay_OneWire(12);
DQ = 0;
Delay_OneWire(80);
DQ = 1;
Delay_OneWire(10);
initflag = DQ;
Delay_OneWire(5);
return initflag;
}
unsigned int duwendu()
{
unsigned char high,low;
unsigned int temp;
//ET0 = 0;
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0x44);
Delay_OneWire(200);
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0xbe);
low = Read_DS18B20();
high = Read_DS18B20();
temp = high<<8;
temp |= low;
temp = temp*0.0625;
//ET0 = 1;
return temp;
}
onewire.h
#ifndef __ONEWIRE_H
#define __ONEWIRE_H
unsigned char rd_temperature(void); //; ;
unsigned int read_temp();
#endif
main.c
#include<stc15f2k60s2.h>
#include<onewire.h>
#include<keydrive.h>
#define uchar unsigned char
#define uint unsigned int
sbit buzz = P0^6;
sbit relay = P0^4;
bit temp_flag = 0;
bit set_flag = 0;
bit waring_flag = 0;
bit light_flag = 0;
bit relay_flag = 0;
uchar code duan[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0x00,0x40};
uchar disbuff[8];
uchar temp;
uchar temp_range[4];
uchar temp_max = 30,temp_min = 20;
uint light;
uchar mode = 1;
void set_fucker()
{
if(relay_flag == 1)
{
P2 = P2&0x1f|0xa0;
relay = 1;
buzz = 0;
P2 = P2&0x1f;
}
if(relay_flag == 0)
{
P2 = P2&0x1f|0xa0;
relay = 0;
buzz = 0;
P2 = P2&0x1f;
}
}
void display()
{
static uchar index;
P2 = P2&0x1f|0xe0;
P0 = ~0x00;
P2 = P2&0x1f;
P2 = P2&0x1f|0xc0;
P0 = 1<<index;
P2 = P2&0x1f;
P2 = P2&0x1f|0xe0;
P0 = ~duan[disbuff[index]];
P2 = P2&0x1f;
index++;
index &= 0x07;
}
void show_num()
{
if(set_flag == 0)
{
disbuff[0] = 17;
disbuff[1] = mode;
disbuff[2] = 17;
disbuff[3] = 16;
disbuff[4] = 16;
disbuff[5] = 16;
disbuff[6] = temp/10;
disbuff[7] = temp%10;
}
else if(set_flag == 1)
{
{
disbuff[0] = 17;
disbuff[1] = temp_range[0];
disbuff[2] = temp_range[1];
disbuff[3] = 16;
disbuff[4] = 16;
disbuff[5] = 17;
disbuff[6] = temp_range[2];
disbuff[7] = temp_range[3];
}
}
}
void keyfun(uchar key_val)
{
static uchar i;
if(key_val == set)
{
set_flag = ~set_flag;
temp_max = temp_range[0]*10+temp_range[1];
temp_min = temp_range[2]*10+temp_range[3];
if(temp_min>temp_max)
{
waring_flag = 1;
}
else waring_flag = 0;
}
if((set_flag == 1)&&('0'<=key_val)&&(key_val<='9'))
{
temp_range[i] = key_val-'0';
i++;
i &= 0x03;
}
if(key_val == clr)
{
for(i=0;i<4;i++)
temp_range[i]=0;
i = 0;
}
}
void led_set(uchar led_dat)
{
P2 = P2&0x1f|0x80;
P0 = led_dat;
P2 = P2&0x1f;
}
void set_drive()
{
if(temp<temp_min)
{
mode = 0;
light = 800;
relay_flag = 0;
}
if(temp>=temp_min&&temp<=temp_max)
{
mode = 1;
light = 400;
relay_flag = 0;
}
if(temp>temp_max)
{
mode = 2;
light = 200;
relay_flag = 1;
}
if(waring_flag == 1)
{
led_set(0xfd);
}
if((set_flag == 1)&&(waring_flag == 0))
{
led_set(0xff);
}
if((set_flag == 0)&&(waring_flag == 0))
{
if(light_flag == 0)
{
led_set(0xff);
}
if(light_flag == 1)
{
led_set(0xfe);
}
}
}
void Timer0Init(void) //1毫秒@12.000MHz
{
AUXR |= 0x80; //定时器时钟1T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0x20; //设置定时初值
TH0 = 0xD1; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0 = 1;
EA = 1;
}
void time1() interrupt 1
{
static uchar count;
static uint light_count;
display();
keyscan();
set_drive();
set_fucker();
if(++count == 100)
{
temp_flag = 1;
count = 0;
}
if(++light_count >= light)
{
light_flag = ~light_flag;
light_count = 0;
}
}
void main()
{
Timer0Init();
while(1)
{
show_num();
keydrive();
if(temp_flag == 1)
{
temp = duwendu();
temp_flag = 0;
}
}
}