压力传感器 HX711 程序

#include

#define uchar unsigned char

#define uint unsigned int

#define ulong unsigned long

uchar code table[]="0123456789";

uchar code table1[]=".Kg";

sbitlcden=P3^4;

sbitlcdrs=P3^5;

sbit ADDO=P2^3;

sbit ADSK=P2^4;

sbit beep=P2^2;

uintshiqian,qian,bai,shi,ge;

ulongzhl;

void delay(uintms)

{

uinti,j;

for(i=ms;i>0;i--)

for(j=110;j>0;j--);

}

voidwrite_com(uchar com)

{

lcdrs=0;

P1=com;

delay(10);

lcden=1;

delay(5);

lcden=0;

}

voidinit()

{

lcden=0;

write_com(0x38);//0011 1000 显示模式16*2显示，5*7点阵，8位数据接口

write_com(0x0c);//0000 1100 开显示不显示光标光标不闪烁

write_com(0x06);//0000 0110 当读或写一字符后地址指针加一且光标加一，显示不移动write_com(0x01);//0000 0001 显示清零数据指针清零

}

voidwrite_data(uchar date)

{

P1=date;

delay(10);

lcden=1;

delay(5);

lcden=0;

}

void display()

{

ulongtamp,zhl;

if(zhl>0||zhl<16777216)//进行判断是否满足条件

{

tamp=((zhl*298)/100000)-24714;//进行AD转换计算

shiqian=tamp/10000; //进行计算

qian=tamp%10000/1000;

bai=tamp%10000%1000/100;

shi=tamp%10000%1000%100/10;

ge=tamp%10000%1000%100%10;

write_com(0x80+0x05); //表示使用哪个1602中的地址显示

write_data(table[shiqian]); // 显示值

delay(50);

write_com(0x80+0x06); //表示使用哪个1602中的地址显示

write_data(table[qian]); // 显示值

delay(50); //延时，主要是用来解决显示屏是否忙还是不忙

write_com(0x80+0x07);

write_data(table1[0]);

delay(50);

write_com(0x80+0x08);

write_data(table[bai]);

delay(50);

write_com(0x80+0x09);

write_data(table[shi]);

delay(50);

write_com(0x80+0x0A);

write_data(table[ge]);

write_com(0x80+0x0B);

write_data(table[1]);

delay(50);

write_com(0x80+0x0C);

write_data(table1[2]);

delay(50);

}

else

{

uint z;

for(z=0;z<=15;z++) //判断条件是否超出量程，报警。

{

beep=1;

delay(50);

beep=0;

delay(50);

}

}

}

ulong hx711()

{

ulong Count;

uchar z;

ADSK=0;//PD_SCK置低

Count=0;

while(ADDO);//AD转换结束时DO置0，退出读取

for(z=0;z<24;z++)

{

ADSK=1;

Count=Count<<1;//下降沿来时左移一位，右补0

ADSK=0;

if(ADDO)

Count++;

}

ADSK=1;

Count=Count^0x800000;//第25个脉冲下降沿来时转换数据ADSK=0;

return(Count);

}

void main()

{

init();

while(1)

{

zhl=hx711();

display();

}

}