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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2194 | - | 1 | /* |
| 2 | bmp085 lib 0x01 |
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| 3 | |||
| 4 | copyright (c) Davide Gironi, 2012 |
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| 5 | |||
| 6 | Released under GPLv3. |
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| 7 | Please refer to LICENSE file for licensing information. |
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| 8 | |||
| 9 | References: |
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| 10 | - this library is a porting of the bmp085driver 0.4 ardunio library |
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| 11 | http://code.google.com/p/bmp085driver/ |
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| 12 | |||
| 13 | Notes: |
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| 14 | - to compile with avrgcc you may define -lm flag for some math functions |
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| 15 | */ |
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| 16 | |||
| 17 | |||
| 18 | #ifndef BMP085_H_ |
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| 19 | #define BMP085_H_ |
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| 20 | |||
| 21 | #include <stdio.h> |
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| 22 | #include <avr/io.h> |
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| 23 | |||
| 24 | #define BMP085_ADDR (0x77<<1) //0x77 default I2C address |
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| 25 | |||
| 26 | #define BMP085_I2CFLEURYPATH "i2cmaster.h" //define the path to i2c fleury lib |
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| 27 | #define BMP085_I2CINIT 1 //init i2c |
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| 28 | |||
| 29 | //registers |
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| 30 | #define BMP085_REGAC1 0xAA |
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| 31 | #define BMP085_REGAC2 0xAC |
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| 32 | #define BMP085_REGAC3 0xAE |
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| 33 | #define BMP085_REGAC4 0xB0 |
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| 34 | #define BMP085_REGAC5 0xB2 |
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| 35 | #define BMP085_REGAC6 0xB4 |
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| 36 | #define BMP085_REGB1 0xB6 |
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| 37 | #define BMP085_REGB2 0xB8 |
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| 38 | #define BMP085_REGMB 0xBA |
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| 39 | #define BMP085_REGMC 0xBC |
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| 40 | #define BMP085_REGMD 0xBE |
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| 41 | #define BMP085_REGCONTROL 0xF4 //control |
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| 42 | #define BMP085_REGCONTROLOUTPUT 0xF6 //output 0xF6=MSB, 0xF7=LSB, 0xF8=XLSB |
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| 43 | #define BMP085_REGREADTEMPERATURE 0x2E //read temperature |
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| 44 | #define BMP085_REGREADPRESSURE 0x34 //read pressure |
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| 45 | |||
| 46 | //modes |
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| 47 | #define BMP085_MODEULTRALOWPOWER 0 //oversampling=0, internalsamples=1, maxconvtimepressure=4.5ms, avgcurrent=3uA, RMSnoise_hPA=0.06, RMSnoise_m=0.5 |
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| 48 | #define BMP085_MODESTANDARD 1 //oversampling=1, internalsamples=2, maxconvtimepressure=7.5ms, avgcurrent=5uA, RMSnoise_hPA=0.05, RMSnoise_m=0.4 |
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| 49 | #define BMP085_MODEHIGHRES 2 //oversampling=2, internalsamples=4, maxconvtimepressure=13.5ms, avgcurrent=7uA, RMSnoise_hPA=0.04, RMSnoise_m=0.3 |
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| 50 | #define BMP085_MODEULTRAHIGHRES 3 //oversampling=3, internalsamples=8, maxconvtimepressure=25.5ms, avgcurrent=12uA, RMSnoise_hPA=0.03, RMSnoise_m=0.25 |
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| 51 | |||
| 52 | //autoupdate temperature enabled |
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| 53 | #define BMP085_AUTOUPDATETEMP 1 //autoupdate temperature every read |
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| 54 | |||
| 55 | //setup parameters |
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| 56 | #define BMP085_MODE BMP085_MODEULTRAHIGHRES //define a mode |
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| 57 | #define BMP085_UNITPAOFFSET 0 //define a unit offset (pa) |
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| 58 | #define BMP085_UNITMOFFSET 0 //define a unit offset (m) |
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| 59 | |||
| 60 | //avarage filter |
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| 61 | #define BMP085_FILTERPRESSURE 1 //avarage filter for pressure |
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| 62 | |||
| 63 | //variables |
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| 64 | int bmp085_regac1, bmp085_regac2, bmp085_regac3, bmp085_regb1, bmp085_regb2, bmp085_regmb, bmp085_regmc, bmp085_regmd; |
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| 65 | unsigned int bmp085_regac4, bmp085_regac5, bmp085_regac6; |
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| 66 | long bmp085_rawtemperature, bmp085_rawpressure; |
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| 67 | |||
| 68 | //functions |
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| 69 | extern void bmp085_init(); |
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| 70 | extern int32_t bmp085_getpressure(); |
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| 71 | extern double bmp085_getaltitude(); |
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| 72 | extern double bmp085_gettemperature(); |
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| 73 | |||
| 74 | #endif |