用IO模拟IIC读取BMP180，读到的UT是0，UP是65535，校准系数能够读出来，求解求解。

wzf302886364 · 发表于 2017-10-25 01:56:56

用原子大大的mpu6050例程的模拟IIC读取BMP180，读到的UT是0，UP是65535，校准系数能够读出来，求解求解。代码贴出来，求大神解答啊，硬件什么的应该没问题。
[mw_shl_code=c,true]#include "bmp180.h"
#include "delay.h"
#include "mpuiic.h"
#include "sys.h"
#include "math.h"
#include "usart.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;

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

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

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

MPU_IIC_Start();                //Æeê¼DÅoÅ
MPU_IIC_Send_Byte(BMP180_SlaveAddress); //·￠Ëíéè±¸μØÖ·+D′DÅoÅ BMP180_SlaveAddress  0xee ÆøÑ1′«¸DÆ÷Æ÷¼tμØÖ·
while(MPU_IIC_Wait_Ack());
MPU_IIC_Send_Byte(0xF4); // write register address
while(MPU_IIC_Wait_Ack());
MPU_IIC_Send_Byte(0x2E);    // write register data for temp
while(MPU_IIC_Wait_Ack());
MPU_IIC_Stop();                //·￠Ëíí￡Ö1DÅoÅ
delay_ms(50); // max time is 4.5ms
return Multiple_read(0xF6);
}
//*************************************************************
u16 bmp180ReadPressure(void)
{
//u16 pressure = 0;

MPU_IIC_Start();                //Æeê¼DÅoÅ
MPU_IIC_Send_Byte(BMP180_SlaveAddress); //·￠Ëíéè±¸μØÖ·+D′DÅoÅ
while(MPU_IIC_Wait_Ack());
MPU_IIC_Send_Byte(0xF4);             // write register address
while(MPU_IIC_Wait_Ack());
MPU_IIC_Send_Byte(0x34);       // write register data for pressure
while(MPU_IIC_Wait_Ack());
MPU_IIC_Stop();                   //·￠Ëíí￡Ö1DÅoÅ
delay_ms(50);                   // max time is 4.5ms

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

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

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

//3õê¼»ˉBMP085￡¬¸ù¾YDèòaÇë2Î¿¼pdf½øDDDT¸Ä**************
void Init_BMP180()
{
MPU_IIC_Init();
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);
printf("ac1:%d \r\n",ac1);
printf("ac2:%d \r\n",ac2);
printf("ac3:%d \r\n",ac3);
printf("ac4:%d \r\n",ac4);
printf("ac5:%d \r\n",ac5);
printf("ac6:%d \r\n",ac6);
printf("b1:%d \r\n",b1);
printf("b2:%d \r\n",b2);
printf("mb:%d \r\n",mb);
printf("mc:%d \r\n",mc);
printf("md:%d \r\n",md);
}
//***********************************************************************
void bmp180Convert()
{
unsigned int ut=0;
unsigned long up=0;
long x1, x2, b5, b6, x3, b3, p;
unsigned long b4, b7;

ut = bmp180ReadTemp();    // ¶áè¡ÎÂ¶è
up = bmp180ReadPressure();  // ¶áè¡Ñ1Ç¿ return pressure;
  printf("up:%ld \r\n",up);
printf("ut:%d \r\n",ut);
//*************
x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
x2 = ((long) mc << 11) / (x1 + md);
b5 = x1 + x2;
result_UT = ((b5 + 8) >> 4);
//*************
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);

}

/****************************************************************
¡¡¡¡¡¡oˉêyÃû3Æ￡oBMP085_Get_Altitude
¡¡¡¡¡¡oˉêy1|Äü￡o»ñè¡o￡°Î¸ß¶èÖμ
¡¡¡¡¡¡èë¿ú2Îêy￡oÎT
¡¡¡¡¡¡3ö¿ú2Îêy￡oaltitude //intDí  2×Ö½ú￡¬μ±Ç°o￡°Î¸ß¶èÖμ
¡¡¡¡¡¡±¸ ×￠￡o    ·μ»ØμÄ¸ß¶èÖμμ￥Î»ÎaàåÃ×￡¬μ÷óÃê±Ôù»»Ëã3é′øD¡êyμÄòÔÃ×Îaμ￥Î»μÄ¸ß¶èÖμ
*****************************************************************/

double BMP180_Get_Altitude(long p)
{
double  altitude;
p=(float)p; //»ñè¡ÆøÑ1Öμ
altitude=44330.0*(1-pow((double)p/101325,1/5.255));    //¸ù¾YD¾Æ¬êÖ2áìá1©μÄ1«ê½¼ÆËão￡°Î¸ß¶è
altitude*=100;      //×a»»3éàåÃ×μ￥Î»μÄ¸ß¶èÖμ￡¬μ÷óÃê±Ôù»»Ëã3é′øD¡êyμÄ¸ß¶èÖμ￡¬ìá¸ß¾«¶è
return altitude;
}
[/mw_shl_code]

[mw_shl_code=c,true]#include "led.h"
#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "mpu6050.h"
#include "usmart.h"
#include "mpuiic.h"
#include "bmp180.h"

//′®¿ú1·￠Ëí1¸ö×Ö·û
//c:òa·￠ËíμÄ×Ö·û
void usart1_send_char(u8 c)
{
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET); //Ñ-»··￠Ëí,Ö±μ½·￠Ëííê±Ï
USART_SendData(USART1,c);
}

int main(void)
{

long  result_UT;
long  result_UP;
   int BMP180_ID;
   double Altitude;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //éèÖÃNVICÖD¶Ï·Ö×é2:2Î»ÇàÕ¼óÅÏè¼¶￡¬2Î»Ïìó|óÅÏè¼¶
uart_init(9600);      //′®¿ú3õê¼»ˉÎa500000
delay_init(); //Ñóê±3õê¼»ˉ
usmart_dev.init(72); //3õê¼»ˉUSMART
   Init_BMP180();

while(1)
  {
   BMP180_ID = MPU_Read_Byte(0xd0);    //¶áè¡IDμØÖ·
   printf("BMP180_ID:0x%x \r\n",BMP180_ID);
   bmp180Convert();
   Altitude=BMP180_Get_Altitude(result_UP);
   printf("Press:%.ld Pa \r\n",result_UP);
   printf("Altitude:%lf m \r\n",Altitude);
   printf("Temperature:%ld \r\n",result_UT);

   delay_ms(1000);
}
}
[/mw_shl_code]

求解答……