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讀取函數都是同一個函數，一路檢查到讀出來的校正系數都是00，但是讀溫度時，讀出來的數會隨著我手摸而變化，應該是讀出來了吧。
#include<reg52.h>
typedef unsigned int uint;
typedef unsigned char uchar;
typedef unsigned short ushort;
//extern void i2cstart();
//extern void i2cstop();
//extern bit i2cwrite(uchar);
//extern i2cread(bit);
extern bit ack_i2c();//返回ack值
extern bit eewrite(uchar add,uchar date);//eeprom地址add，寫入一個字節date
//extern uchar eeread(uchar add);//eeprom讀取一個字節，地址為add
extern void str_eeread(uchar,uchar);//多字節從eeprom讀出(連續讀)
uchar a[15]={0};
short AC1;
short AC2;
short AC3,B1,B2,MB,MC,MD;
ushort AC4;
ushort AC5;
ushort AC6;
uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,
0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
//int B1;
//short B2;
//short MB;
//short MC;
//short MD;
uchar MSB=0,LSB=0;
long int UT,UP,Tr,Pr,B5;
uchar oss=0;
void delay(uint z)
{
while(z--);
}
short zi(uchar add)//讀取一個字（即兩字節）并返回
{
short x=0;
str_eeread(2,add);
MSB=a[0];
LSB=a[1];
x=MSB<<8+LSB;
return x;
}
ushort u_zi(uchar add)
{
ushort x=0;
str_eeread(2,add);
MSB=a[0];
LSB=a[1];
x=MSB<<8+LSB;
return x;
}
void init_bmp180()
{
// AC1=zi(0xaa);
str_eeread(2,0xaa);
MSB=a[0];
LSB=a[1];
AC1=a[0]<<8+a[1];
AC2=zi(0xac);
AC3=zi(0xae);
AC4=u_zi(0xb0);
AC5=u_zi(0xb2);
AC6=u_zi(0xb4);
B1=zi(0xb6);
B2=zi(0xb8);
MB=zi(0xba);
MC=zi(0xbc);
MD=zi(0xbe);
}
void read_no_temper()//讀非校正的溫度
{
eewrite(0xf4,0x2e);
delay(600);//等待大于4.5ms
// UT=zi(0xf6);
str_eeread(2,0XF6);
MSB=a[0];
LSB=a[1];
UT=MSB<<8+LSB;
}
void read_no_pres()//讀未校正的大氣壓力
{
uchar x=0;
x=0x34+oss<<6;
eewrite(0xf4,x);
delay(10000);
str_eeread(3,0xf6);
UP=(a[0]<<16+a[1]<<8+a[2])>>(8-oss);
}
void txd_uart(uchar *p,uchar len);
void temper()//溫度校正
{
long X1=0,X2=0;
X1=(UT-AC6)*AC5>>15;
X2=(MC<<11)/(X1+MD);
B5=X1+X2;
a[0]=AC1>>8;
a[1]=AC1;
txd_uart(a,2);
Tr=(B5+8)>>4;
}
void pres()//大氣壓力校正
{
long X1,X2,X3,B3,B6,B7;
unsigned long B4=0;
X1=X2=X3=B3=B6=B7=0;
B6=B5-4000;
X1=(B2*((B6*B6)>>12))>>11;
X2=(AC2*B6)>>11;
X3=X1+X2;
B3=((AC1*4+X3)<<oss+2)>>2;
X1=(AC3*B6)>>13;
X2=(B1*((B6*B6)>>12))>>16;
X3=((X1+X2)+2)>>2;
B4=(AC4*(unsigned long)(X3+32768))>>15;
B7=((unsigned long)UP-B3)*(50000>>oss);
if(B7<0x80000000)
Pr=(B7*2)/B4;
else
Pr=(B7/B4)*2;
X1=(Pr>>8)*(Pr>>8);
X1=(X1*3038)>>16;
X2=(-7357*Pr)>>16;
Pr=Pr+(X1+X2+3791)>>4;
}
void string_bmp180(uchar *p)
{
uchar qian,bai,shi,ge;
qian=bai=shi=ge=0;
qian=Tr/1000;
bai=Tr/100%10;
shi=Tr/10%10;
ge=Tr%10;
p[0]=qian;
p[1]=bai;
p[2]=shi;
p[3]=ge;
}
///////////////////////以下為串口程序
void config_uart(uint x)//串口比特率x，包含初始化串口
{
EA=1;
ET1=0;
ES=1;
SCON=0X00;
SM0=0;
SM1=1;
REN=1;
TMOD=0X20;
TH1=256-11059200/12/32/x;
TL1=TH1;
TR1=1;
}
void txd_uart(uchar *p,uchar len)//串口發送，發送個數len>=1
{
while(len--)
{
SBUF=*p;
while(!TI);
TI=0;
p++;
}
}
///////////////////////////////////////
void display_led(uchar x,uchar y)//x表示數碼管位，從左到右：0-3；y為要顯示的數字0-f
{
P2=~(0x01<<x);
P3=table[y];
delay(10);
P2=0xff;
P3=0xff;//數碼管消隱
}
///////////////////////////////////////
void main()
{
uint count=0;
config_uart(9600);
delay(50000);
delay(50000);
init_bmp180();
while(1)
{
if(count>5000)
{
delay(50000);
read_no_temper();
txd_uart(a,2);
// read_no_pres();
temper();
// pres();
// Tr=184;
string_bmp180(a);
txd_uart(a,4);
count=0;
}
display_led(0,a[0]);
display_led(1,a[1]);
display_led(2,a[2]);
P2=~(0x04);
P3=~(0x80);
delay(10);
P2=P3=0xff;
display_led(3,a[3]);
count++;
/* if(!ack_i2c())
{
Tr=1112;
}
else
Tr=0011;
string_bmp180(a);*/
}
}
///////////////////////
void uart() interrupt 4
{
if(RI)
{
RI=0;
}
else if(TI)
{
}
}
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