{"id":59,"date":"2013-04-25T18:56:00","date_gmt":"2013-04-25T15:56:00","guid":{"rendered":"https:\/\/gpstronic.com\/Martin-Nikiforov\/?p=59"},"modified":"2023-06-25T18:58:26","modified_gmt":"2023-06-25T15:58:26","slug":"%d0%b4%d0%b0%d1%82%d1%87%d0%b8%d0%ba-%d0%b7%d0%b0-%d0%bd%d0%b0%d0%bb%d1%8f%d0%b3%d0%b0%d0%bd%d0%b5-bmp085-%d0%bd%d0%b0-bosch","status":"publish","type":"post","link":"https:\/\/gpstronic.com\/Martin-Nikiforov\/2013\/04\/25\/%d0%b4%d0%b0%d1%82%d1%87%d0%b8%d0%ba-%d0%b7%d0%b0-%d0%bd%d0%b0%d0%bb%d1%8f%d0%b3%d0%b0%d0%bd%d0%b5-bmp085-%d0%bd%d0%b0-bosch\/","title":{"rendered":"\u0414\u0430\u0442\u0447\u0438\u043a \u0437\u0430 \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 bmp085 \u043d\u0430 Bosch"},"content":{"rendered":"\n
\"\"<\/a><\/figure>\n\n\n\n

\u0422\u043e\u0432\u0430 \u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u0430 \u0437\u0430 \u0447\u0435\u0442\u0435\u043d\u0435 \u043d\u0430 \u0434\u0430\u043d\u043d\u0438 \u043e\u0442 \u0434\u0430\u0442\u0447\u0438\u043a \u0437\u0430 \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 bmp085 \u0438 \u0438\u0437\u0447\u0438\u0441\u043b\u044f\u0432\u0430\u043d\u0435 \u043d\u0430 \u0440\u0435\u0430\u043b\u043d\u0438\u0442\u0435 \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430 \u0438 \u0430\u0442\u043c\u043e\u0441\u0444\u0435\u0440\u043d\u043e \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430\u0439\u043a\u0438 \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u0430 \u0430\u0440\u0438\u0442\u043c\u0435\u0442\u0438\u043a\u0430. \u0412 \u0441\u043b\u0443\u0447\u0430\u044f \u0441\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430 DSPIC33FJ256MC710 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0435\u0440  \u043d\u0430 Microchip, \u043d\u043e \u0431\u0438 \u0442\u0440\u044f\u0431\u0432\u0430\u043b\u043e \u0434\u0430 \u0440\u0430\u0431\u043e\u0442\u0438 \u0438 \u0441 \u0432\u0441\u0435\u043a\u0438 \u0434\u0440\u0443\u0433. \u0417\u0430 \u0438\u0437\u0432\u0435\u0436\u0434\u0430\u043d\u0435 \u043d\u0430 \u0434\u0430\u043d\u043d\u0438\u0442\u0435 \u0441\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430 \u0434\u0432\u0443\u0440\u0435\u0434\u043e\u0432 \u0434\u0438\u0441\u043f\u043b\u0435\u0439.<\/p>\n\n\n\n

\"\"\/<\/a><\/figure>\n\n\n\n

#include „.\/dspic33.h“
#INCLUDE <math.h><\/p>\n\n\n\n

#use delay(clock=20000000)
\/\/#use rs232(UART1,baud=19200,parity=N,bits=8,stream=uart1)
#use i2c(Master,Fast,sda=PIN_G3,scl=PIN_G2)<\/p>\n\n\n\n

    
     #define LCD_RS_PIN      PIN_D1\/\/\/\/
     #define LCD_RW_PIN      PIN_D2
     #define LCD_ENABLE_PIN  PIN_D3 \/\/\/\/
     #define LCD_DATA4       PIN_D12                                    \/\/\/\/
     #define LCD_DATA5       PIN_D13                                    \/\/\/\/
     #define LCD_DATA6       PIN_D4                                    \/\/\/\/
     #define LCD_DATA7       PIN_D5  <\/p>\n\n\n\n

#include <LCD.C>
                                         
 int oss=0; \/\/oversampling 0-low current 1-standart, 2,3- precision  
 signed int32 UT ;
 unsigned int32 UP;
 signed int16 AC1,AC2,AC3;
 unsigned int16 AC4,AC5,AC6;
 signed int16 B1,B2,MB,MC,MD;
 signed int32 X1,X2,B5,temperature,B6,X3,B3, pressure;
 unsigned int32 B4,B7;
 float altitude;
 
 signed int16 bmp085_read(int reg_address);
 void bmp085_write_control(int data);<\/p>\n\n\n\n

void main()
{  
    lcd_init();
    
    lcd_putc(„\\fDesigned by\\n“);
    lcd_putc(„Martin Nikiforov“);
    delay_ms(1000);
    lcd_putc(„\\f“);
    
    AC1=bmp085_read(0xAA);   \/\/ read parameters from bmp085’s eeprom
    AC2=bmp085_read(0xAC);
    AC3=bmp085_read(0xAE);
    
    AC4=bmp085_read(0xB0);
    AC5=bmp085_read(0xB2);
    AC6=bmp085_read(0xB4);
    
    B1=bmp085_read(0xB6);
    B2=bmp085_read(0xB8);
    MB=bmp085_read(0xBA);
    MC=bmp085_read(0xBC);
    MD=bmp085_read(0xBE);<\/p>\n\n\n\n

 oss=3;\/\/0-low current for more accuracy 1,2,3
 while(true)
 {
   bmp085_write_control(0x2E);  \/\/0x2E set to measure temperature   4,5ms                                                              
    delay_ms(5);
    UT=(unsigned int16)bmp085_read(0xF6); \/\/read 0xF6 register temperature                             
        
    bmp085_write_control(0x34+(0x40*oss));  \/\/0x34 – oss=0 set to measure pressure   4,5ms conv
                                            \/\/oss=1 the value must be 0x74 oss =2 0xb4 , oss=3 0xF4
    delay_ms(7*(oss+1));
    
    UP=(unsigned int16)bmp085_read(0xF6);\/\/pressure
    UP<<=8;
    UP=(UP+(((unsigned int16)bmp085_read(0xF8))>>8))>>(8-oss);\/\/XLSB extra precision byte
    
    X1=((UT-AC6)*AC5)>>15;
    X2=(((signed int32)MC)<<11)\/(X1+MD);
    B5=X1+X2;
    temperature=(B5+8)>>4;            
    
    B6=B5-4000;
    X1=(((signed int32)B2)*((B6*B6)\/4096))\/2048;
    X2=(((signed int32)AC2)*B6)\/2048;
    X3=X1+X2;
    B3=((((((signed int32)AC1)*4)+X3)*((int)pow(2,oss)))+2)\/4;
    X1=(((signed int32)AC3)*B6)\/8192;
    X2=(((signed int32)B1)*((B6*B6)\/4096))\/65536;
    X3=((X1+X2)+2)\/4;
    B4=(((unsigned int32)AC4)*(unsigned int32)(X3+32768))>>15;
    B7=(unsigned int32)(((unsigned int32)UP)-B3)*(50000>>oss);
    if(B7<0x80000000){pressure=(B7<<1)\/B4;}
    else {pressure=(B7\/B4)*2;}
    X1=(pressure>>8)*(pressure>>8);
    X1=(((unsigned int32)X1)*3038)\/65536;                                         
    X2=(-7357*pressure)\/65536;
    pressure=pressure+(X1+X2+3791)\/16;
       
    altitude=  44330.0*(1.0-pow((pressure\/102325.0),(1\/5.255)));
    \/\/calculate altitude 102325.0 must be 101325.0 but where i live give me negative altitude
    
                           
    printf(lcd_putc,“\\aT=%4.1gC P=%5.1g\\nAltitude%6.1g m\\n“,temperature\/10.0,pressure\/100.0,altitude);
  \/\/ screen refresh slowly when using \\f
  delay_ms(200);
 }
    
}<\/p>\n\n\n\n

signed int16 bmp085_read(int reg_address)
{
    int msb,lsb;
    int16 data=0;
    i2c_start();
    i2c_write(0b11101110);    \/\/ Device address
    i2c_write(reg_address);  \/\/ Data to device
    i2c_start();            \/\/ Restart
    i2c_write(0b11101111);     \/\/ to change data direction
    msb=i2c_read(1);        \/\/ Now read from slave
    lsb=i2c_read(0);
    i2c_stop();
    data=msb;
    data<<=8;
    data=data|lsb;
    return (data);
}
void bmp085_write_control(int data)
{<\/p>\n\n\n\n

    i2c_start();
    i2c_write(0b11101110);\/\/     \/\/ Device address
    i2c_write(0xF4);  \/\/control reg address
    i2c_write(data);   \/\/write the data                 
    i2c_stop();
    
}<\/p>\n","protected":false},"excerpt":{"rendered":"

\u0422\u043e\u0432\u0430 \u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u0430 \u0437\u0430 \u0447\u0435\u0442\u0435\u043d\u0435 \u043d\u0430 \u0434\u0430\u043d\u043d\u0438 \u043e\u0442 \u0434\u0430\u0442\u0447\u0438\u043a \u0437\u0430 \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 bmp085 \u0438 \u0438\u0437\u0447\u0438\u0441\u043b\u044f\u0432\u0430\u043d\u0435 \u043d\u0430 \u0440\u0435\u0430\u043b\u043d\u0438\u0442\u0435 \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430 \u0438 \u0430\u0442\u043c\u043e\u0441\u0444\u0435\u0440\u043d\u043e \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430\u0439\u043a\u0438 \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u0430 \u0430\u0440\u0438\u0442\u043c\u0435\u0442\u0438\u043a\u0430. \u0412 \u0441\u043b\u0443\u0447\u0430\u044f \u0441\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430 DSPIC33FJ256MC710 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0435\u0440  \u043d\u0430 Microchip, \u043d\u043e \u0431\u0438 \u0442\u0440\u044f\u0431\u0432\u0430\u043b\u043e \u0434\u0430 \u0440\u0430\u0431\u043e\u0442\u0438 \u0438 \u0441 \u0432\u0441\u0435\u043a\u0438 \u0434\u0440\u0443\u0433. \u0417\u0430 \u0438\u0437\u0432\u0435\u0436\u0434\u0430\u043d\u0435 \u043d\u0430 \u0434\u0430\u043d\u043d\u0438\u0442\u0435 \u0441\u0435 \u0438\u0437\u043f\u043e\u043b\u0437\u0432\u0430 \u0434\u0432\u0443\u0440\u0435\u0434\u043e\u0432 \u0434\u0438\u0441\u043f\u043b\u0435\u0439. #include „.\/dspic33.h“#INCLUDE <math.h> #use delay(clock=20000000)\/\/#use rs232(UART1,baud=19200,parity=N,bits=8,stream=uart1)#use i2c(Master,Fast,sda=PIN_G3,scl=PIN_G2)… Continue reading \u0414\u0430\u0442\u0447\u0438\u043a \u0437\u0430 \u043d\u0430\u043b\u044f\u0433\u0430\u043d\u0435 bmp085 \u043d\u0430 Bosch<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,25,27],"tags":[21,23,29,24,18,26,28],"class_list":["post-59","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-25","category-27","tag-diy","tag-electronic","tag-microcontroller","tag-24","tag-18","tag-26","tag-28","entry"],"_links":{"self":[{"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/posts\/59","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/comments?post=59"}],"version-history":[{"count":2,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/posts\/59\/revisions"}],"predecessor-version":[{"id":61,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/posts\/59\/revisions\/61"}],"wp:attachment":[{"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/media?parent=59"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/categories?post=59"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gpstronic.com\/Martin-Nikiforov\/wp-json\/wp\/v2\/tags?post=59"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}