?? ex6-4.c
字號:
/*
標(biāo)題：范例6-4
版本：1.0
Target：89S51
程序描述：智能溫度感測器，這個范例中使用到
（1）8051 的Port 1連接到LCD顯示器，PORT 3的P3.3,P3.4和P3.5分別連接到LCD顯示器的控制線，程序執(zhí)行時可以讓LCD顯示器顯示出時間和日期。
（2）溫度感測組件AD590經(jīng)由ADC0804將感測到的溫度，轉(zhuǎn)換成數(shù)字?jǐn)?shù)據(jù)，然后經(jīng)由PORT 0輸入8051。
（3）8051的第10和第11只腳RXD和TXD分別連線到MAX232，然后連接到PC的COM埠。
（4）8051實驗板每 小時就讀入ADC0804轉(zhuǎn)換的數(shù)字溫度數(shù)據(jù)，然后記錄在串行式EEPROM 93C66中。
（5）8051實驗板可以經(jīng)由RS232將記錄在串行EEPROM 93C66中的數(shù)字溫度數(shù)據(jù)傳送PC端。*/
/* ***************************************************** */
#include <REGX51.H>
#include <lcd.h>
#define XTAL 11059200
#define baudrate 9600
#define TIMES 25
#define TIMER0_COUNT 0xD8F0 /* 10000h-((12,000,000/(12*100)) */
/* 數(shù)字時鐘的工作模式 */
#define SET 11
#define TRUE 1
#define FALSE 0
#define putchar write_LCD_data
#define adc_in P0
#define adc_rd P3_7
#define adc_wr P3_6
//
#define mode_button P2_7
#define operation_button P2_6
#define up_button P2_5
#define down_button P2_4
//
typedef struct {
char hour;
char minute;
char second;
} time;
typedef struct {
char year;
char month;
char day;
} date;
time now={23,59,0},display;
date today={04,12,15},tmpday;
static unsigned timer0_tick=100,mode=0,operation;
char code dayofmonth[]={31,28,31,30,31,30,31,31,30,31,30,31};
char code
weekday[7][4]={"MON","TUE","WED","THU","FRI","SAT","SUN"};
char code int2char[]="0123456789";
unsigned char txOK,c,set_time;
int AT93C66_add,send_count;
// 0 表示不記錄在 AT93C66, 1 表示要記錄在 AT93C66中
unsigned char temp_wr;
/*
AT93C66的讀寫程序
*/
unsigned char read_byte(int);
void write_byte(int,unsigned char);
void delay(void)
{
unsigned char i,j;
for(i=0;i<125;i++)
for(j=0;j<255;j++)
;
}
void display_tempreture(unsigned char number)
{
unsigned char x,y;
y=(number<<1) - 232;
x=y/10;
gotoxy(1,9);
write_LCD_data(int2char[x]);
x=y%10;
write_LCD_data(int2char[x]);
if( temp_wr==1) {
write_byte(AT93C66_add,y);
if(AT93C66_add > 255) {
write_byte(0,1);
x=AT93C66_add -256;
write_byte(1,x);
} else write_byte(1,(unsigned char)AT93C66_add);
temp_wr=0;
AT93C66_add++;
}
}
void display_time(void)
{
gotoxy(1,0);
display_LCD_number(display.hour);
display_LCD_string(":");
display_LCD_number(display.minute);
display_LCD_string(":");
display_LCD_number(display.second);
}
void display_date()
{
char i,days=4;
gotoxy(2,2);
display_LCD_number(tmpday.year);
display_LCD_string("/");
display_LCD_number(tmpday.month);
display_LCD_string("/");
display_LCD_number(tmpday.day);
display_LCD_string(" ");
if(tmpday.month > 1)
for(i=0;i<=tmpday.month-2;i++)
days+=(dayofmonth[i]%7);
if( tmpday.year !=0 ) days+=((tmpday.year-1)/4)
+tmpday.year+1;
if (tmpday.year%4==0 && tmpday.month >2) days++;
days=(days+tmpday.day) % 7;
display_LCD_string(&weekday[days][0]);
}
char monthday(char year,char month)
{
if(month==2 && year%4==0) //潤年的2月有29天
return(29);
else
return(dayofmonth[month-1]); //非閏年時的該月份天數(shù)
}
static void timer0_isr(void) interrupt TF0_VECTOR using 1
{
TR0=0;
TL0=(TIMER0_COUNT & 0x00FF);
TH0=(TIMER0_COUNT >> 8);
TR0=1;
if(mode==1) return;
if(--timer0_tick) return;
timer0_tick=100;
now.second++; //秒加1
if (now.second==60) { //如果秒等于60
now.second=0; //秒恢復(fù)為0
now.minute++; //分加1
if (now.minute==60) { //如果分等于60
now.minute=0; //分恢復(fù)為0
adc_wr=0;
now.hour++; //時加1
adc_wr=1;
temp_wr=1;
if (now.hour==24) { //如果時等于24
now.hour=0; //時恢復(fù)為0
today.day++; //日加1
if (today.day>monthday(today.year,today
.month)) {
today.day=1; //如果日超過當(dāng)月最大日數(shù),就變成1
today.month++; //月加1
if(today.month==13) { //如果月等于13
today.month=1; //月恢復(fù)為1
today.year++; //年加1
}
}
tmpday=today;
display_date();
}
}
}
display=now;
display_time();
}
static void timer0_initialize(void)
{
EA=0;
TR0=0;
TMOD &= 0XF0;
TMOD |=0x01;
TL0=(TIMER0_COUNT & 0x00FF);
TH0=(TIMER0_COUNT >> 8);
PT0=0;
ET0=1;
TR0=1;
EA=1;
}
static void int0_isr(void) interrupt 0 using 0
{
unsigned char voltage;
adc_in=0xFF;
adc_rd=0;
voltage=adc_in;
voltage=voltage <<1;
adc_rd=1;
display_tempreture(voltage);
}
static void com_isr(void) interrupt SIO_VECTOR using 1
{
if(TI) {
TI=0;
if (send_count < AT93C66_add) {
SBUF=read_byte(send_count)+32; // 傳送數(shù)據(jù)
send_count++;
}
}
}
void com_initialize(void) {
PCON |= 0x80;
TMOD=0x20;
TH1=(unsigned char) (256-(XTAL/(16L*12L*baudrate)));
TR1=(unsigned char) (256-(XTAL/(16L*12L*baudrate)));
SCON=0x50;
ES=1;
TR1=1;
}
char gotkey() {
if (mode_button==0) {
delay();
if (mode_button==0) return(0);
}
if (operation_button==0) {
delay();
if (operation_button==0) return(1);
}
if (up_button==0) {
delay();
if (up_button==0) return(2);
}
if (down_button==0) {
delay();
if (down_button==0) return(3);
}
return(15);
}
//
void main (void) {
char keys;
txOK=1;
mode=0;
operation=0;
init_LCD();
clear_LCD();
gotoxy(2,0);
display_LCD_string("20");
display=now;
display_time();
tmpday=today;
display_date();
EA=1;
com_initialize();
timer0_initialize();
IT0=1;
EX0=1;
adc_wr=0;
temp_wr=0;
adc_wr=1;
do {
keys=gotkey();
switch(keys) {
case 0 :
mode++;
if(mode==4) mode=0;
gotoxy(1,12);
write_LCD_data(int2char[mode]);
if(mode==1) {
display=now;
tmpday=today;
}
if(mode==2) {
now=display;
today=tmpday;
}
break;
case 1 :
if(mode==0) break;
if(mode==1) {
operation++;
if(operation==5) operation=0;
}
if(mode==2) {
send_count=1;
SBUF=read_byte(0)+32; // 傳送數(shù)據(jù)
}
if(mode==3) {
write_byte(0,0);
write_byte(0,0);
write_byte(1,6);
write_byte(2,today.year);
write_byte(3,today.month);
write_byte(4,today.day);
write_byte(5,now.hour);
AT93C66_add=6;
adc_wr=0;
temp_wr=1;
adc_wr=1;
}
gotoxy(1,14);
write_LCD_data(int2char[operation]);
break;
case 2 :
if(mode!=1) break;
switch(operation) {
case 0 : display.hour++;
if(display.hour>=24)
display.hour=0;
gotoxy(1,0);
display_LCD_number
(display.hour);
break;
case 1 : display.minute++;
if(display.minute>=60)
display.minute=0;
gotoxy(1,3);
display_LCD_number
(display.minute);
break;
case 2 : tmpday.year++;
if(tmpday.year>=100)
tmpday.year=0;
display_date();
break;
case 3 : tmpday.month++;
if(tmpday.month>12) tmpday.
month=1;
display_date();
break;
case 4 : tmpday.day++;
if(tmpday.day>monthday
(tmpday.year,
tmpday.month))
tmpday.day=1;
display_date();
break;
}
break;
case 3 :
if(mode!=1) break;
switch(operation) {
case 0 : display.hour--;
if(display.hour<0) display.hour=23;
gotoxy(1,0);
display_LCD_number(display.hour);
break;
case 1 : display.minute--;
if(display.minute<0)
display.minute=59;
gotoxy(1,3);
display_LCD_number
(display.minute);
break;
case 2 : tmpday.year--;
if(tmpday.year<0) tmpday.year=99;
display_date();
break;
case 3 : tmpday.month--;
if(tmpday.month<1) tmpday.month=12;
display_date();
break;
case 4 : tmpday.day--;
if(tmpday.day<1)
tmpday.day=monthday
(tmpday.year,tmpday.month);
display_date();
break;
}
}
} while(1);
}
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