Sarawut Dechjarusyothin / D6F-PH

reading diff-pressure form OMRON D6F-PH0505

D6F-PH.cpp@0:1d476876f987, 2015-06-27 (annotated)

Committer:
Chillee
Date:
Sat Jun 27 10:17:59 2015 +0000
Revision:
0:1d476876f987
Diff-Pressure Sensor from OMRON

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Chillee 0:1d476876f987 1 #include "mbed.h"
Chillee 0:1d476876f987 2 #include "D6F-PH.h"
Chillee 0:1d476876f987 3
Chillee 0:1d476876f987 4
Chillee 0:1d476876f987 5 // Class constructor
Chillee 0:1d476876f987 6
Chillee 0:1d476876f987 7 D6F_PH::D6F_PH(I2C *i2c) :
Chillee 0:1d476876f987 8 _i2c(i2c){
Chillee 0:1d476876f987 9 }
Chillee 0:1d476876f987 10
Chillee 0:1d476876f987 11
Chillee 0:1d476876f987 12 float D6F_PH::read_pressure(void) {
Chillee 0:1d476876f987 13 char error;
Chillee 0:1d476876f987 14 char rdata[2];
Chillee 0:1d476876f987 15 uint16_t raw_diff_pa;
Chillee 0:1d476876f987 16 float diff_pa;
Chillee 0:1d476876f987 17
Chillee 0:1d476876f987 18 error = _i2c->write(D6F_ADDR, d6f_config, 5);
Chillee 0:1d476876f987 19 wait_us(40000);
Chillee 0:1d476876f987 20 error |= _i2c->write(D6F_ADDR, d6f_comp_read, 4);
Chillee 0:1d476876f987 21 error |= _i2c->write(D6F_ADDR, d6f_mem_read, 1, true);
Chillee 0:1d476876f987 22 error |= _i2c->read(D6F_ADDR, rdata, 2);
Chillee 0:1d476876f987 23 if(error) {
Chillee 0:1d476876f987 24 return(error);
Chillee 0:1d476876f987 25 }
Chillee 0:1d476876f987 26 raw_diff_pa = (rdata[0]<<8) + rdata[1];
Chillee 0:1d476876f987 27 diff_pa = ((float)raw_diff_pa-1024)/600 - 50;
Chillee 0:1d476876f987 28 return(diff_pa);
Chillee 0:1d476876f987 29 }
Chillee 0:1d476876f987 30
Chillee 0:1d476876f987 31
Chillee 0:1d476876f987 32 float D6F_PH::read_d6f_temp(void) {
Chillee 0:1d476876f987 33 char error;
Chillee 0:1d476876f987 34 char rdata[2];
Chillee 0:1d476876f987 35 uint16_t raw_ref_temp;
Chillee 0:1d476876f987 36 float ref_temp;
Chillee 0:1d476876f987 37
Chillee 0:1d476876f987 38 error = _i2c->write(D6F_ADDR, d6f_config, 5);
Chillee 0:1d476876f987 39 wait_us(40000);
Chillee 0:1d476876f987 40 error |= _i2c->write(D6F_ADDR, d6f_temp_read, 4);
Chillee 0:1d476876f987 41 error |= _i2c->write(D6F_ADDR, d6f_mem_read, 1, true);
Chillee 0:1d476876f987 42 error |= _i2c->read(D6F_ADDR, rdata, 2);
Chillee 0:1d476876f987 43 if(error) {
Chillee 0:1d476876f987 44 return(error);
Chillee 0:1d476876f987 45 }
Chillee 0:1d476876f987 46 raw_ref_temp = (rdata[0]<<8) + rdata[1];
Chillee 0:1d476876f987 47 ref_temp = ((float)raw_ref_temp-10214)/37.39;
Chillee 0:1d476876f987 48 return(ref_temp);
Chillee 0:1d476876f987 49 }
Chillee 0:1d476876f987 50
Chillee 0:1d476876f987 51 uint8_t D6F_PH::init(void) {
Chillee 0:1d476876f987 52 uint8_t error;
Chillee 0:1d476876f987 53
Chillee 0:1d476876f987 54 // Init config cmd
Chillee 0:1d476876f987 55 //d6f_config[5] = {0x00, 0xD0, 0x40, 0x18, 0x06};
Chillee 0:1d476876f987 56 d6f_config[0] = 0x00;
Chillee 0:1d476876f987 57 d6f_config[1] = 0xD0;
Chillee 0:1d476876f987 58 d6f_config[2] = 0x40;
Chillee 0:1d476876f987 59 d6f_config[3] = 0x18;
Chillee 0:1d476876f987 60 d6f_config[4] = 0x06;
Chillee 0:1d476876f987 61
Chillee 0:1d476876f987 62 //d6f_comp_read[4] = {0x00, 0xD0, 0x51, 0x2C};
Chillee 0:1d476876f987 63 d6f_comp_read[0] = 0x00;
Chillee 0:1d476876f987 64 d6f_comp_read[1] = 0xD0;
Chillee 0:1d476876f987 65 d6f_comp_read[2] = 0x51;
Chillee 0:1d476876f987 66 d6f_comp_read[3] = 0x2C;
Chillee 0:1d476876f987 67
Chillee 0:1d476876f987 68 //d6f_temp_read[4] = {0x00, 0xD0, 0x61, 0x2C};
Chillee 0:1d476876f987 69 d6f_temp_read[0] = 0x00;
Chillee 0:1d476876f987 70 d6f_temp_read[1] = 0xD0;
Chillee 0:1d476876f987 71 d6f_temp_read[2] = 0x61;
Chillee 0:1d476876f987 72 d6f_temp_read[3] = 0x2C;
Chillee 0:1d476876f987 73
Chillee 0:1d476876f987 74 //d6f_mem_read[1] = {0x07};
Chillee 0:1d476876f987 75 d6f_mem_read[0] = 0x07;
Chillee 0:1d476876f987 76
Chillee 0:1d476876f987 77 d6f_init[0] = 0x0B;
Chillee 0:1d476876f987 78 d6f_init[1] = 0x00;
Chillee 0:1d476876f987 79 error = _i2c->write(D6F_ADDR, d6f_init, 2);
Chillee 0:1d476876f987 80
Chillee 0:1d476876f987 81 return(error);
Chillee 0:1d476876f987 82 }
Chillee 0:1d476876f987 83