Dmitry Dzhafarkhanov / HP206C

HP206C waterproof high-accuracy barometr ported from arduino

Dependents:   projetS1

HP20x_dev.cpp@0:573122fe4fd1, 2014-10-30 (annotated)

Committer:
Dzhafarkhanov
Date:
Thu Oct 30 14:00:11 2014 +0000
Revision:
0:573122fe4fd1
HP206C Waterproof barometr

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Dzhafarkhanov 0:573122fe4fd1 1 /*
Dzhafarkhanov 0:573122fe4fd1 2 * File name : HP20x_dev.cpp
Dzhafarkhanov 0:573122fe4fd1 3 * Description: Driver for I2C PRECISION BAROMETER AND ALTIMETER [HP206C]
Dzhafarkhanov 0:573122fe4fd1 4 * Author : Oliver Wang from Seeed studio
Dzhafarkhanov 0:573122fe4fd1 5 * Version : V0.1
Dzhafarkhanov 0:573122fe4fd1 6 * Create Time: 2014/04
Dzhafarkhanov 0:573122fe4fd1 7 * Change Log :
Dzhafarkhanov 0:573122fe4fd1 8 */
Dzhafarkhanov 0:573122fe4fd1 9
Dzhafarkhanov 0:573122fe4fd1 10 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 11 /*** Include files ***/
Dzhafarkhanov 0:573122fe4fd1 12 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 13 #include "HP20x_dev.h"
Dzhafarkhanov 0:573122fe4fd1 14 #include "mbed.h"
Dzhafarkhanov 0:573122fe4fd1 15 //#include "KalmanFilter.h"
Dzhafarkhanov 0:573122fe4fd1 16 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 17 /*** Local Variable ***/
Dzhafarkhanov 0:573122fe4fd1 18 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 19
Dzhafarkhanov 0:573122fe4fd1 20
Dzhafarkhanov 0:573122fe4fd1 21
Dzhafarkhanov 0:573122fe4fd1 22 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 23 /*** Class member Functions ***/
Dzhafarkhanov 0:573122fe4fd1 24 /****************************************************************************/
Dzhafarkhanov 0:573122fe4fd1 25 /*
Dzhafarkhanov 0:573122fe4fd1 26 **@ Function name: HP20x_dev
Dzhafarkhanov 0:573122fe4fd1 27 **@ Description: Constructor
Dzhafarkhanov 0:573122fe4fd1 28 **@ Input: none
Dzhafarkhanov 0:573122fe4fd1 29 **@ OutPut: none
Dzhafarkhanov 0:573122fe4fd1 30 **@ Retval: none
Dzhafarkhanov 0:573122fe4fd1 31 */
Dzhafarkhanov 0:573122fe4fd1 32
Dzhafarkhanov 0:573122fe4fd1 33 HP20x_dev::HP20x_dev(PinName p_sda, PinName p_scl) : i2c(p_sda, p_scl) {
Dzhafarkhanov 0:573122fe4fd1 34 OSR_CFG = HP20X_CONVERT_OSR1024;
Dzhafarkhanov 0:573122fe4fd1 35 OSR_ConvertTime = 25;
Dzhafarkhanov 0:573122fe4fd1 36 }
Dzhafarkhanov 0:573122fe4fd1 37
Dzhafarkhanov 0:573122fe4fd1 38
Dzhafarkhanov 0:573122fe4fd1 39 /*
Dzhafarkhanov 0:573122fe4fd1 40 **@ Function name: begin
Dzhafarkhanov 0:573122fe4fd1 41 **@ Description: Initialize HP20x_dev
Dzhafarkhanov 0:573122fe4fd1 42 **@ Input: none
Dzhafarkhanov 0:573122fe4fd1 43 **@ OutPut: none
Dzhafarkhanov 0:573122fe4fd1 44 **@ Retval: none
Dzhafarkhanov 0:573122fe4fd1 45 */
Dzhafarkhanov 0:573122fe4fd1 46 void HP20x_dev::reset()
Dzhafarkhanov 0:573122fe4fd1 47 {
Dzhafarkhanov 0:573122fe4fd1 48
Dzhafarkhanov 0:573122fe4fd1 49 /* Reset HP20x_dev */
Dzhafarkhanov 0:573122fe4fd1 50 char data_write[1];
Dzhafarkhanov 0:573122fe4fd1 51 data_write[0] = HP20X_SOFT_RST;
Dzhafarkhanov 0:573122fe4fd1 52 if ( i2c.write( HP20X_ADDRESS, data_write, 1,0 ) );
Dzhafarkhanov 0:573122fe4fd1 53 wait_ms(60);
Dzhafarkhanov 0:573122fe4fd1 54
Dzhafarkhanov 0:573122fe4fd1 55 }
Dzhafarkhanov 0:573122fe4fd1 56
Dzhafarkhanov 0:573122fe4fd1 57 /*
Dzhafarkhanov 0:573122fe4fd1 58 **@ Function name: isAvailable
Dzhafarkhanov 0:573122fe4fd1 59 **@ Description: Indicate whether it's available
Dzhafarkhanov 0:573122fe4fd1 60 **@ Input: none
Dzhafarkhanov 0:573122fe4fd1 61 **@ OutPut: none
Dzhafarkhanov 0:573122fe4fd1 62 **@ Retval: uchar
Dzhafarkhanov 0:573122fe4fd1 63 */
Dzhafarkhanov 0:573122fe4fd1 64 char HP20x_dev::isAvailable()
Dzhafarkhanov 0:573122fe4fd1 65 {
Dzhafarkhanov 0:573122fe4fd1 66 char ret = readByte(HP20X_ADDRESS,REG_PARA|HP20X_RD_REG_MODE);//readreg
Dzhafarkhanov 0:573122fe4fd1 67 return ret;
Dzhafarkhanov 0:573122fe4fd1 68 }
Dzhafarkhanov 0:573122fe4fd1 69
Dzhafarkhanov 0:573122fe4fd1 70
Dzhafarkhanov 0:573122fe4fd1 71
Dzhafarkhanov 0:573122fe4fd1 72 long HP20x_dev::ReadPressure(void)
Dzhafarkhanov 0:573122fe4fd1 73 {
Dzhafarkhanov 0:573122fe4fd1 74
Dzhafarkhanov 0:573122fe4fd1 75
Dzhafarkhanov 0:573122fe4fd1 76 writeByte(HP20X_ADDRESS,HP20X_WR_CONVERT_CMD,OSR_CFG);
Dzhafarkhanov 0:573122fe4fd1 77
Dzhafarkhanov 0:573122fe4fd1 78 wait_ms(OSR_ConvertTime);
Dzhafarkhanov 0:573122fe4fd1 79
Dzhafarkhanov 0:573122fe4fd1 80 char data_write[1];
Dzhafarkhanov 0:573122fe4fd1 81 data_write[0] = HP20X_READ_P;
Dzhafarkhanov 0:573122fe4fd1 82 if ( i2c.write( HP20X_ADDRESS,data_write,1,0 ) );
Dzhafarkhanov 0:573122fe4fd1 83
Dzhafarkhanov 0:573122fe4fd1 84 long TempData = 0;
Dzhafarkhanov 0:573122fe4fd1 85 long tmpArray[3]={0};
Dzhafarkhanov 0:573122fe4fd1 86
Dzhafarkhanov 0:573122fe4fd1 87
Dzhafarkhanov 0:573122fe4fd1 88 /* Require three bytes from slave */
Dzhafarkhanov 0:573122fe4fd1 89
Dzhafarkhanov 0:573122fe4fd1 90 char data[3];
Dzhafarkhanov 0:573122fe4fd1 91
Dzhafarkhanov 0:573122fe4fd1 92 data_write[0] = I2C_DID_RD_MASK;
Dzhafarkhanov 0:573122fe4fd1 93 i2c.write(HP20X_ADDRESS, data_write, 1, 1); // no stop
Dzhafarkhanov 0:573122fe4fd1 94 i2c.read(HP20X_ADDRESS, data, 3, 0);
Dzhafarkhanov 0:573122fe4fd1 95 for(int ii = 0; ii < 3; ii++) {
Dzhafarkhanov 0:573122fe4fd1 96 tmpArray[ii] = data[ii];}
Dzhafarkhanov 0:573122fe4fd1 97
Dzhafarkhanov 0:573122fe4fd1 98 /* MSB */
Dzhafarkhanov 0:573122fe4fd1 99 TempData = tmpArray[0]<<16 | tmpArray[1]<<8 | tmpArray[2];
Dzhafarkhanov 0:573122fe4fd1 100
Dzhafarkhanov 0:573122fe4fd1 101
Dzhafarkhanov 0:573122fe4fd1 102 if(TempData&0x800000)
Dzhafarkhanov 0:573122fe4fd1 103 {
Dzhafarkhanov 0:573122fe4fd1 104 TempData|=0xff000000;
Dzhafarkhanov 0:573122fe4fd1 105 }
Dzhafarkhanov 0:573122fe4fd1 106
Dzhafarkhanov 0:573122fe4fd1 107 return TempData;
Dzhafarkhanov 0:573122fe4fd1 108
Dzhafarkhanov 0:573122fe4fd1 109 }
Dzhafarkhanov 0:573122fe4fd1 110
Dzhafarkhanov 0:573122fe4fd1 111
Dzhafarkhanov 0:573122fe4fd1 112 void HP20x_dev::writeByte(uint8_t address, uint8_t subAddress, uint8_t data)
Dzhafarkhanov 0:573122fe4fd1 113 {
Dzhafarkhanov 0:573122fe4fd1 114 char data_write[2];
Dzhafarkhanov 0:573122fe4fd1 115 data_write[0] = subAddress;
Dzhafarkhanov 0:573122fe4fd1 116 data_write[1] = data;
Dzhafarkhanov 0:573122fe4fd1 117 i2c.write(address, data_write, 2, 0);
Dzhafarkhanov 0:573122fe4fd1 118 }
Dzhafarkhanov 0:573122fe4fd1 119
Dzhafarkhanov 0:573122fe4fd1 120 char HP20x_dev::readByte(uint8_t address, uint8_t subAddress)
Dzhafarkhanov 0:573122fe4fd1 121 {
Dzhafarkhanov 0:573122fe4fd1 122 char data[1]; // `data` will store the register data
Dzhafarkhanov 0:573122fe4fd1 123 char data_write[1];
Dzhafarkhanov 0:573122fe4fd1 124 data_write[0] = subAddress;
Dzhafarkhanov 0:573122fe4fd1 125 i2c.write(address, data_write, 1, 1); // no stop
Dzhafarkhanov 0:573122fe4fd1 126 i2c.read(address, data, 1, 0);
Dzhafarkhanov 0:573122fe4fd1 127 return data[0];
Dzhafarkhanov 0:573122fe4fd1 128 }
Dzhafarkhanov 0:573122fe4fd1 129
Dzhafarkhanov 0:573122fe4fd1 130
Dzhafarkhanov 0:573122fe4fd1 131
Dzhafarkhanov 0:573122fe4fd1 132 /**************************************END OF FILE**************************************/