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#include "reg52.h"
#include "My_type.h" //數據類型頭文件
#include <intrins.h>
#define nop() _nop_()
#define uchar unsigned char
#define uint unsigned int
sbit Lcd_rs=P2^0;
sbit Lcd_rw=P2^1;
sbit Lcd_en=P2^2;
sbit key1 = P3^5;
sbit key2 = P3^6;
sbit key3 = P3^7;
sbit Beep = P2^7;
sbit Led = P2^6;
sbit CS=P1^3; //使能
sbit CLK=P1^1; //時鐘
sbit Do=P1^2; // 數據輸出
sbit Di=P1^2; //數據輸入
#define first_channel 0x02 //通道1
#define second_channel 0x03 //通道2
uchar CH = first_channel;
#define Fclk 11059200UL /*使用11.0592M晶體*/
#define BitRate 9600UL /*波特率定義為9600*/
uint8 Sending; //發送標志
code uint16 AD_Tab[41] = {512, 2048, 2970, 3840, 4659, 5581,
6349, 7117, 7782, 8397, 9165, 9830,
10291, 11162, 11520, 11981, 12749, 13210,
13926, 14490, 15206, 15821, 16538, 17357,
17971, 18842, 19814, 20838, 21760, 22477,
23091, 23603, 23962, 24371, 24678, 24883,
25037, 25190, 25293, 25395, 25600};
uint8 temp_zheng;
float temp_xiao;
uint8 flag10ms = 0;
uint8 flag50ms = 0;
uint8 get10s = 0;
uint8 flagget10s = 0;
uint8 Alarmflag = 1;
uint16 sum = 0;
uint8 count5ms = 0;
uint8 Wh = 40;
uint8 Wl = 20;
void Delay_lcd1602(uint dly)
{
uint i;
for(; dly>0; dly--)
for(i=0; i<100; i++);
}
bit Lcd_busy()
{
bit result;
Lcd_rw = 1;
Lcd_rs = 0;
Lcd_en = 1;
nop();nop();nop();nop();
result = (bit)(P0&0x80);
Lcd_en = 0;
return(result);
}
void Write_com(uchar com)
{
while(Lcd_busy()); //LCD忙等待
Lcd_rs = 0;
Lcd_rw = 0;
P0 = com;
Delay_lcd1602(5);
Lcd_en = 1;
Delay_lcd1602(5);
Lcd_en = 0;
}
void Write_data(uchar date)
{
while(Lcd_busy()); //LCD忙等待
Lcd_rs = 1;
Lcd_rw = 0;
P0 = date;
Delay_lcd1602(5);
Lcd_en = 1;
Delay_lcd1602(5);
Lcd_en = 0;
}
void Lcd_init()
{
Lcd_en = 0;
Write_com(0x38);
Delay_lcd1602(5);
Write_com(0x0c);
Delay_lcd1602(5);
Write_com(0x04);
Delay_lcd1602(5);
Write_com(0x01);
Delay_lcd1602(5);
}
void Lcd_Pos(uchar yPos,uchar xPos) //設置第（xPos,yPos）個字符的DDRAM地址
{
uchar tmp;
xPos &= 0x0f; //x位置范圍是0~15，因為顯示15列
yPos &= 0x01; //y位置范圍是0~1，因為顯示2行
if(yPos==0) //顯示第一行
{
tmp = xPos;
}
else
{
tmp = xPos + 0x40; //顯示第二行
}
tmp |= 0x80;
Write_com(tmp);
}
void Write_char(uchar c,uchar xPos,uchar yPos) //定義Write_Char函數
{
Lcd_Pos(xPos,yPos);
Write_data(c);
}
void Write_String(uchar *s,uchar xPos,uchar yPos) //定義Write_String函數
{
uchar i = 0;
Lcd_Pos(xPos,yPos);
while(*s)
{
Write_data(*(s++));
if(++i>16) break;
}
}
void InitUART(void)
{
EA=0;
TMOD|=0x21; //定時器1工作在模式2
SCON=0x50; //串口工作在模式1
TCON=0x05;
TH1=256-Fclk/(BitRate*12*16);
TL1=256-Fclk/(BitRate*12*16);
TH0 = (65535 - 1000)/256;
TL0 = (65535 - 1000)%256;
ET0 = 1;
TR0 = 1;
PCON=0x80; //串口波特率加倍
ES=1; //串行中斷允許
TR1=1; //啟動定時器1
REN=1; //允許接收
EA=1; //允許中斷
}
void UartISR(void) interrupt 4
{
if(RI) //收到數據
{
RI=0; //清中斷請求
}
else //發送完一字節數據
{
TI=0;
Sending=0; //清正在發送標志
}
}
void PutChar_to_Uart(uint8 d)
{
Sending=1;
SBUF=d;
while(Sending);
}
void Prints(uint8 *pd)
{
while((*pd)!='\0')
{
PutChar_to_Uart(*pd);
pd++;
}
}
unsigned char ADconv(void)
{
unsigned char i;
unsigned int data_f=0,data_c=0;
ET0 = 0;
TR0 = 0;
Di=1;
CS=1;
_nop_();
CS=0;
Di=1; ;//芯片使能之前的初始化。第一個下降沿
CLK=1;
_nop_();
_nop_();
CLK=0; // 確定通道模式、第2個下降沿
_nop_();
_nop_();
CLK=1;
Di=(bit)(0x02&CH); //設定通道初始化
_nop_();
CLK=0;
_nop_();
_nop_();
CLK=1;
Di=(bit)(0x01&CH); //設定通道初始化 .第3個下降沿
_nop_();
_nop_();
CLK=0; //AD轉化的初始化完成。
Di=1;
CLK=1;
_nop_();
_nop_();
CLK=0;
_nop_();
CLK=1;
for(i=8;i>0;i--)//得到一個正常排序的8位數據
{
data_f|=Do;
data_f<<=1;
CLK=1;
_nop_();
_nop_();
CLK=0;
_nop_();
}
for(i=8;i>0;i--)//得到一個反序排列的8位數據
{
data_c<<=1;
data_c|=Do;
_nop_();
CLK=1;
_nop_();
_nop_();
CLK=0;
_nop_();
}
CLK=0;
_nop_();
_nop_();
CLK=1;
_nop_();
_nop_();
CLK=0;
_nop_();
_nop_();
CLK=1;
_nop_();
CS=1;
_nop_();
_nop_();
ET0 = 1;
TR0 = 1;
return data_f;
}
/*
void delay_ms(unsigned int x)
{
unsigned int i,j;
i=0;
for(i=0;i<x;i++)
{
j=108;
while(j--);
}
}
*/
void DispVal(uint8 pdat, uint8 x, uint8 y)
{
/*
PutChar_to_Uart(pdat/100 + 0x30);
PutChar_to_Uart(pdat%100/10 + 0x30);
PutChar_to_Uart(pdat%100%10 + 0x30);
*/
Write_char(pdat/100 + 0x30, x, y);
Write_char(pdat%100/10 + 0x30, x, y+1);
Write_char(pdat%100%10 + 0x30, x, y+2);
}
void Process10ms(void)
{
if (flag10ms == 1)
{
flag10ms = 0;
count5ms ++;
if (count5ms == 5)
{
count5ms = 0;
flag50ms = 1;
}
get10s++;
sum = sum + ADconv();
if (get10s == 10)
{
get10s = 0;
ET0 = 0;
TR0 = 0;
flagget10s = 1;
sum = sum / 10;
}
if (key1==0)
{
while (!key1);
Wh++;
if (Wh >=51)
{
Wh = 40;
}
}
if (key2==0)
{
while (!key2);
Wl++;
if (Wl >=Wh)
{
Wl = 20;
}
}
if (key3==0)
{
while (!key3)
Alarmflag = ~Alarmflag;
}
}
}
/*
void Process50ms(void)
{
if (flag50ms == 1)
{
flag50ms = 0;
Led = ~Led;
}
}
*/
void CheckProcess()
{
uint16 Wig, SetH, SetL;
Wig = (uint16)temp_zheng*100 + (uint16)(temp_xiao*100);
SetH = (uint16)Wh*100;
SetL = (uint16)Wl*100;
if ((Wig>SetH) && (Alarmflag==1))
{
Beep = 0;
}
else if ((Wig<SetL) && (Alarmflag==1))
{
Beep = 0;
}
else if (Alarmflag == 0)
{
Beep = 1;
}
else
{
Beep = 1;
}
}
/*
uchar Get10sAD(void)
{
uchar i;
uint sum = 0;
for (i=0; i<10; i++)
{
sum = sum + ADconv();
delay_ms(10);
}
sum = sum/10;
return sum;
}
*/
void Get_temp(uint ad_temp)
{
uint8 n = 0;
while(1)
{
if ((ad_temp >= AD_Tab[n]) && (ad_temp <= AD_Tab[n+1]))
{
temp_zheng = n + 10;
temp_xiao = (1.0*(ad_temp - AD_Tab[n]))/(AD_Tab[n+1] - AD_Tab[n]);
break;
}
n++;
if (n>40)
{
break;
}
}
}
void Disp_Voltage(void)
{
uchar temp;
temp = (uchar)(temp_xiao * 100);
Prints("Weight:"); //提示語
PutChar_to_Uart(temp_zheng/100 + 0x30);
PutChar_to_Uart(temp_zheng%100/10 + 0x30);
PutChar_to_Uart(temp_zheng%100%10 + 0x30);
PutChar_to_Uart('.');
PutChar_to_Uart(temp/10 + 0x30);
PutChar_to_Uart(temp%10 + 0x30);
PutChar_to_Uart('T');
PutChar_to_Uart(0x0d); //換行
PutChar_to_Uart(0x0a); //換行
Write_char(temp_zheng/100 + 0x30, 0, 8);
Write_char(temp_zheng%100/10 + 0x30, 0, 9);
Write_char(temp_zheng%100%10 + 0x30, 0, 10);
Write_char('.', 0, 11);
Write_char(temp/10 + 0x30, 0, 12);
Write_char(temp%10 + 0x30, 0, 13);
Write_char('T', 0, 14);
}
void main(void)
{
InitUART(); //串口初始化
Lcd_init();
Write_String("Weight: ", 0, 0);
Write_String("H=", 1, 0);
Write_String("L=", 1, 6);
Beep = 1;
while(1)
{
Process10ms();
DispVal(Wh, 1, 2);
DispVal(Wl, 1, 8);
CheckProcess();
if (flagget10s == 1)
{
flagget10s = 0;
Get_temp(sum*100);
ET0 = 1;
TR0 = 1;
Disp_Voltage(); //采集電壓并發送
}
}
}
void Timer0() interrupt 1
{
static uint8 count1ms = 0;
TH0 = (65535 - 1000)/256;
TL0 = (65535 - 1000)%256;
count1ms ++;
if (count1ms == 10)
{
count1ms = 0;
flag10ms = 1;
}
}

復制代碼

接口	說明
CS	片選使能，輸入低電平能使芯片工作
CH1	模擬的輸入通道 1，或作為 IN+/-使用
CH0	模擬的輸入通道 0，或作為 IN+/-使用
GND	接地
DO	轉換數據輸出，數據信號輸出
DI	選擇通道控制，數據信號輸入
CLK	芯片時鐘脈沖輸入
Vcc/REF	5V參考電壓輸入和電源輸入

MUX Address		Channe#
SGL/DIF	ODD/SIGN	0	1
1	0	+
1	1		+
0	0	+	_
0	1	_	+

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