BMP180初始化失败，是什么原因，求大神指点

guizuliu · 发表于 2017-8-16 08:40:10

********main.c********
#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "led.h"
#include "tsensor.h"
#include "oled.h"
#include "myiic.h"
#include "BMP180.h"
#include "math.h"
#include "12864.h"
//ALIENTEK Mini STM32¿a·￠°å·¶ày′úÂë16
//Äú2¿ÎÂ¶è′«¸DÆ÷êμÑé
//¼¼êõÖ§3Ö￡owww.openedv.com
//1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾
int main(void)
{
//u16 adcx;
//float temp;
//float temperate;
extern long result_UT;
extern long  result_UP;
float altitude;

delay_init();            //Ñóê±oˉêy3õê¼»ˉ
uart_init(9600);      //′®¿ú3õê¼»ˉÎa9600
LED_Init();       //3õê¼»ˉóëLEDá¬½óμÄó2¼t½ó¿ú
T_Adc_Init();       //ADC3õê¼»ˉ
OLED_Init(); //3õê¼»ˉOLED
IIC_Init();             //3õê¼»ˉ iic
Init_12864(); //3õê¼»ˉ12864

Init_BMP180();       //3õê¼»ˉbmp180

OLED_ShowString(20,0,"JinAn / P ,m ,`C",12);  //45,0êÇ45áD0DD¿aê¼￡¬12 ′ú±í×Öìå′óD¡￡¬24,12,16 èyÖD′óD¡
OLED_ShowString(0,12,"Air Pressure:",12);
OLED_ShowString(0,32,"Altitude:",12);
OLED_ShowString(0,52,"Temperature:",12);
                                                      //  D¡êyμãÇ°oó    OLED_ShowString(77,12,"1010",12);
                                                      //                OLED_ShowString(106,12,"96",12);
                                                      //OLED_ShowString(100,12,".",12);
                                                      //OLED_ShowString(100,32,".",12);
OLED_ShowString(100,52,".",12);
OLED_Refresh_Gram();//¸üDÂÏÔê¾μ½OLED
while(1)
{
//adcx=T_Get_Adc_Average(ADC_CH_TEMP,10);
//temp=(float)adcx*(3.3/4096);
//temperate=temp;                            //±￡′æÎÂ¶è′«¸DÆ÷μÄμçÑ1Öμ
//adcx=temp;                               //
//temp-=(u8)temp;         //¼õμôÕûêy2¿·Ö
//temperate=(1.43-temperate)/0.0043+25; //¼ÆËã3öμ±Ç°ÎÂ¶èÖμ
//OLED_ShowNum(77,52,(u8)temperate,4,12); ///////////////////////////////////////////////////////ÎÂ¶èÕûêy
//temperate-=(u8)temperate;
//OLED_ShowNum(106,52,temperate*100,2,12);  //ÎÂ¶èD¡êy2¿·Ö
bmp180Convert();

OLED_ShowNum(77,12,result_UP,7,12);                                  //ÏÔê¾ÆøÑ1.....................................
if(result_UP<80000)LED0=0;                                        //ìí¼ó±¨¾ˉ ÆøÑ11yμíê±oò ¸ßÔ-μØÇøÆøÑ1μíóú600mmhg￡¬¶ø1mmhg=133.3p¡￡ËùòÔÎa80000p
altitude=44330.0*(1-pow((float)result_UP/101325,1/5.255));          //¼ÆËã¸ß¶è
OLED_ShowNum(77,32,altitude,4,12);                                  //ÏÔê¾¸ß¶è.......................................

OLED_ShowNum(77,52,(u8)(result_UT*0.1),4,12);                      //ÏÔê¾ÎÂ¶èÕûêy2¿·Ö òòÎa2aá¿ÖμàyèçÎa245Ã»óDD¡êyμã.....
if(result_UT>400)LED0=0;                                        //¿éòÔ¼óò»¸öÅD¶Ï ±¨¾ˉ
result_UT=result_UT-(u8)(result_UT*0.1)*10;                      //¼ÆËãD¡êy2¿·Ö
OLED_ShowNum(103,52,result_UT,1,12);                            // ÏÔê¾D¡êy2¿·Ö....................................

LED1=!LED1;                                           //3ìDòÔËDD ÂìμÆ
delay_ms(250);
OLED_Refresh_Gram();//¸üDÂÏÔê¾μ½OLED
}
}

***************BMP180.c*******
#include "BMP180.h"
#include "delay.h"
#include "myiic.h"
#include "sys.h"
#include "12864.h"

//***BMP085ê1óÃ
long  result_UT=0;
long  result_UP=0;

short ac1;
short ac2;
short ac3;
unsigned short ac4;
unsigned short ac5;
unsigned short ac6;
short b1;
short b2;
short mb;
short mc;
short md;

u8 ge,shi,bai,qian,wan,shiwan;          //ÏÔê¾±äá¿

//*********************************************************
//¶á3öBMP085Äú2¿êy¾Y,á¬Døá½¸ö
//*********************************************************
u16 Multiple_read(u8 ST_Address)
{
u8 msb, lsb;
u16 _data;
IIC_Start();                         //Æeê¼DÅoÅ
IIC_Send_Byte(BMP180_SlaveAddress); //·￠Ëíéè±¸μØÖ·+D′DÅoÅ
while(IIC_Wait_Ack());
IIC_Send_Byte(ST_Address);          //·￠Ëí′æ′￠μ￥ÔaμØÖ·
while(IIC_Wait_Ack());
IIC_Start();                         //Æeê¼DÅoÅ
IIC_Send_Byte(BMP180_SlaveAddress+1);       //·￠Ëíéè±¸μØÖ·+¶áDÅoÅ
while(IIC_Wait_Ack());

msb = IIC_Read_Byte(1);                //BUF[0]′æ′￠
lsb = IIC_Read_Byte(0);             //×îoóò»¸öêy¾YDèòa»ØNOACK

IIC_Stop();                         //í￡Ö1DÅoÅ
delay_ms(5);
_data = msb << 8;
_data |= lsb;
return _data;
}
//********************************************************************
u16 bmp180ReadTemp(void)
{

IIC_Start();                //Æeê¼DÅoÅ
IIC_Send_Byte(BMP180_SlaveAddress); //·￠Ëíéè±¸μØÖ·+D′DÅoÅ BMP180_SlaveAddress  0xee ÆøÑ1′«¸DÆ÷Æ÷¼tμØÖ·
while(IIC_Wait_Ack());
IIC_Send_Byte(0xF4);             // write register address
while(IIC_Wait_Ack());
IIC_Send_Byte(0x2E);    // write register data for temp
while(IIC_Wait_Ack());
IIC_Stop();                //·￠Ëíí￡Ö1DÅoÅ
delay_ms(10); // max time is 4.5ms
return Multiple_read(0xF6);
}
//*************************************************************
u16 bmp180ReadPressure(void)
{
//u16 pressure = 0;

IIC_Start();                //Æeê¼DÅoÅ
IIC_Send_Byte(BMP180_SlaveAddress); //·￠Ëíéè±¸μØÖ·+D′DÅoÅ
while(IIC_Wait_Ack());
IIC_Send_Byte(0xF4);             // write register address
while(IIC_Wait_Ack());
IIC_Send_Byte(0x34);       // write register data for pressure
while(IIC_Wait_Ack());
IIC_Stop();                   //·￠Ëíí￡Ö1DÅoÅ
delay_ms(20);                   // max time is 4.5ms

//pressure = Multiple_read(0xF6);
//pressure &= 0x0FFFF;

return Multiple_read(0xF6);//pressure;
}

//**************************************************************

//3õê¼»ˉBMP085￡¬¸ù¾YDèòaÇë2Î¿¼pdf½øDDDT¸Ä**************
void Init_BMP180()
{

IIC_Init();
Display_string(0,1,"14");
ac1 = Multiple_read(0xAA);
ac2 = Multiple_read(0xAC);
ac3 = Multiple_read(0xAE);
ac4 = Multiple_read(0xB0);
ac5 = Multiple_read(0xB2);
ac6 = Multiple_read(0xB4);
b1 =  Multiple_read(0xB6);
b2 =  Multiple_read(0xB8);
mb =  Multiple_read(0xBA);
mc =  Multiple_read(0xBC);
md =  Multiple_read(0xBE);
Display_string(0,1,"111");
}

void conversion(long temp_data)
{

shiwan=temp_data/100000+0x30 ;
temp_data=temp_data%100000; //è¡óàÔËËã
wan=temp_data/10000+0x30 ;
temp_data=temp_data%10000; //è¡óàÔËËã
qian=temp_data/1000+0x30 ;
temp_data=temp_data%1000; //è¡óàÔËËã
bai=temp_data/100+0x30 ;
temp_data=temp_data%100;    //è¡óàÔËËã
shi=temp_data/10+0x30 ;
temp_data=temp_data%10;    //è¡óàÔËËã
ge=temp_data+0x30;
}

//***********************************************************************
void bmp180Convert()
{
unsigned int ut;
unsigned long up;
long x1, x2, b5, b6, x3, b3, p;
unsigned long b4, b7;

ut = bmp180ReadTemp();    // ¶áè¡ÎÂ¶è
up = bmp180ReadPressure();  // ¶áè¡Ñ1Ç¿ return pressure;
//*************
x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
result_UT = ((b5 + 8) >> 4);

write_12864com(0x89);
write_12864data('T');    //ÎÂ¶èÏÔê¾
write_12864data(':');
write_12864data(bai);
write_12864data(shi);
write_12864data('.');
write_12864data(ge);
write_12864data('C');    //ÎÂ¶èμ￥Î»
write_12864data('a');

//*************
b6 = b5 - 4000;
                           // Calculate B3
x1 = (b2 * (b6 * b6)>>12)>>11;
x2 = (ac2 * b6)>>11;
x3 = x1 + x2;
b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2;
                           // Calculate B4
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)
p = (b7<<1)/b4;
else
p = (b7/b4)<<1;

x1 = (p>>8) * (p>>8);
x1 = (x1 * 3038)>>16;
x2 = (-7357 * p)>>16;
result_UP = p+((x1 + x2 + 3791)>>4);
}

*******************I2C.c************
#include "myiic.h"
#include "delay.h"
#include "led.h"
//////////////////////////////////////////////////////////////////////////////////
//±¾3ìDòÖ»1©Ñ§Ï°ê1óÃ￡¬Î′¾-×÷ÕßDí¿é￡¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
//Mini STM32¿a·￠°å
//IIC Çy¶ˉoˉêy
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:www.openedv.com
//DT¸ÄèÕÆú:2010/6/10
//°æ±¾￡oV1.0
//°æè¨ËùóD￡¬μá°æ±Ø¾¿¡￡
//Copyright(C) ÕyμãÔ-×ó 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////

//3õê¼»ˉIIC
void IIC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//RCC->APB2ENR|=1<<4;//Ïèê1ÄüíaéèIO PORTCê±Öó
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOC, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ; //íÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

IIC_SCL=1;
IIC_SDA=1;

}
//2úéúIICÆeê¼DÅoÅ
void IIC_Start(void)
{
SDA_OUT();    //sdaÏßêä3ö
IIC_SDA=1;
IIC_SCL=1;
delay_us(4);
IIC_SDA=0;//START:when CLK is high,DATA change form high to low
delay_us(4);
IIC_SCL=0;//Çˉ×¡I2C×üÏß￡¬×¼±¸·￠Ëí»ò½óêÕêy¾Y
}
//2úéúIICí￡Ö1DÅoÅ
void IIC_Stop(void)
{
SDA_OUT();//sdaÏßêä3ö
IIC_SCL=0;
IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
delay_us(4);
IIC_SCL=1;
IIC_SDA=1;//·￠ËíI2C×üÏß½áêøDÅoÅ
delay_us(4);
}
//μè′yó|′eDÅoÅμ½à′
//·μ»ØÖμ￡o1￡¬½óêÕó|′eê§°ü
//       0￡¬½óêÕó|′e3é1|
u8 IIC_Wait_Ack(void)
{
u8 ucErrTime=0;
SDA_IN();    //SDAéèÖÃÎaêäèë
IIC_SDA=1;delay_us(1);
IIC_SCL=1;delay_us(1);
while(READ_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
IIC_Stop();
return 1;
}
}
IIC_SCL=0;//ê±Öóêä3ö0
return 0;
}
//2úéúACKó|′e
void IIC_Ack(void)
{
IIC_SCL=0;
SDA_OUT();//éèÖÃÎaêä3ö
IIC_SDA=0;
delay_us(2);
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
}
//2»2úéúACKó|′e
void IIC_NAck(void)
{
IIC_SCL=0;
SDA_OUT();
IIC_SDA=1;
delay_us(2);
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
}
//IIC·￠Ëíò»¸ö×Ö½ú
//·μ»Ø′ó»úóDÎTó|′e
//1￡¬óDó|′e
//0￡¬ÎTó|′e
void IIC_Send_Byte(u8 txd)
{
u8 t;
SDA_OUT();       //éèÖÃÎaêä3ö¡￠
IIC_SCL=0;//à-μíê±Öó¿aê¼êy¾Y′«êä
for(t=0;t<8;t++)
{
      IIC_SDA=(txd&0x80)>>7;
      txd<<=1;
delay_us(2); //¶ÔTEA5767Õaèy¸öÑóê±¶¼êÇ±ØDëμÄ
IIC_SCL=1;
delay_us(2);
IIC_SCL=0;
delay_us(2);
}
}
//¶á1¸ö×Ö½ú￡¬ack=1ê±￡¬·￠ËíACK￡¬ack=0￡¬·￠ËínACK
u8 IIC_Read_Byte(unsigned char ack)
{
unsigned char i,receive=0;
SDA_IN();//SDAéèÖÃÎaêäèë                                  ///////////¶Ôóú°å×ó êäèë¡￠¡￠¡￠¡￠¡￠¡￠¡￠¡￠
for(i=0;i<8;i++ )
{
      IIC_SCL=0;
      delay_us(2);
IIC_SCL=1;
      receive<<=1;
      if(READ_SDA)receive++;
delay_us(1);
}
if (!ack)
      IIC_NAck();//·￠ËínACK
else
      IIC_Ack(); //·￠ËíACK
return receive;
}

/////////////////////////////////////////////////////////bmp180
/*u32 mybmp180(void)
{
IIC_Init();
IIC_Start();
u8 mid;

LED0=!LED0;
return mid;
}*/

电子之旅 · 发表于 2017-8-16 09:10:25

先测试IIC能不能正常读写，检查接线，有示波器结合示波器看IIC波形。下次贴代码可以使用代码格式，看起来比较好

guizuliu · 发表于 2017-8-16 13:49:31

电子之旅发表于 2017-8-16 09:10
先测试IIC能不能正常读写，检查接线，有示波器结合示波器看IIC波形。下次贴代码可以使用代码格式，看起来比 ...

嗯嗯。已将工程上传了

guizuliu · 发表于 2017-8-16 13:49:56

已将工程上传了，麻烦大神们了

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BMP180初始化失败，是什么原因，求大神指点

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