———————————学习，TCK（0-1024℃）分辨率：0.25℃
TC77：分辨率0.0625℃
#include
#define CS RC2
void initPORT();
void initMSSP();
void delay(unsigned char time);
void display(float data);
float ReadTC77();
const unsigned char disp[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void main()
{
float temp;
initPORT();
initMSSP();
while(1)
{
temp=ReadTC77();
display(temp);
}
}
/*初始化P%&&&&&%单片机端口*/
void initPORT()
{
TRISB=0x00; //操控段选
PORTB=0x00;
TRISC=0xf0; //与温度传感器衔接
PORTC=0x00;
TRISA=0x00; //操控位选
PORTA=0xff;
}
/*初始化MSSP模块的SPI形式*/
void initMSSP()
{
SSPSTAT=0x00;
SSPCON=0x30;
SSPIF=0;
}
/*读取温度传感器的13位数值而且转化成浮点类型*/
float ReadTC77()
{
float result,PowerTwo=1;
unsigned char count,HighByte,LowByte;
CS=0;
SSPBUF=0;
while(!SSPIF){}
HighByte=SSPBUF; //获取温度寄存器的高字节
SSPIF=0;
SSPBUF=0;
while(!SSPIF){}
LowByte=SSPBUF; //获取温度寄存器的低字节
SSPIF=0;
CS=1;
for(count=0;count<8;count++) //转化整数部分
{
PowerTwo*=2;
if(HighByte&(0x01<
}
PowerTwo=1;
for(count=0;count<5;count++) //转化个位及小数部分
{
if(LowByte&(0x80>>count)) result+=PowerTwo;
PowerTwo=PowerTwo/2.; //留意，不能换成.2，不然会犯错
}
return result; //回来转化浮点成果
}
/*液晶显现*/
void display(float data)
{
unsigned int conver,First,Second,Third,Fourth;
conver=data*100;
First=conver/1000;
Second=conver/100%10;
Third=conver/10%10;
Fourth=conver%10;
PORTA=0xfe; //显现十位
PORTB=disp[First];
delay(2);
PORTB=0x00;
PORTA=0xfd; //显现个位
PORTB=0x80+disp[Second]; //加上0x80即可带点
delay(2);
PORTB=0x00;
PORTA=0xfb; //显现非常位
PORTB=disp[Third];
delay(2);
PORTB=0x00;
PORTA=0xf7; //显现百分位
PORTB=disp[Fourth];
delay(2);
PORTB=0x00;
}
void delay(unsigned char time)
{
unsigned char i,j;
for(i=time;i>0;i–)
for(j=255;j>0;j–);
}
声明：本文内容来自网络转载或用户投稿，文章版权归原作者和原出处所有。文中观点，不代表本站立场。若有侵权请联系本站删除（kf@86ic.com）https://www.86ic.net/fangan/dianlu/272138.html
