Shinichi Takayama / Mbed OS MIP8f_ThunderBoard2

JDI_MIP on ThunderBoardSense2(Silicon-Labs)

JDI_MIP (LPM013M126A) Sample on ThunderBoard2(Silicon-Labs)

/media/uploads/STakayama/mip8_tb2_sample0_.jpg LPM013M126A /media/uploads/STakayama/mip8_tb2_sample1.jpg

Links

https://os.mbed.com/teams/JapanDisplayInc/

https://os.mbed.com/teams/JapanDisplayInc/wiki/MIP-reflective-color-display

BMP280/BMP280.cpp@13:9fb661dd4b2a, 2019-01-22 (annotated)

Committer:
STakayama
Date:
Tue Jan 22 10:23:39 2019 +0000
Revision:
13:9fb661dd4b2a
Parent:
10:525bcf8907fc 
BackColor = Cyan

Who changed what in which revision?

UserRevisionLine numberNew contents of line
STakayama 10:525bcf8907fc 1 /**
STakayama 10:525bcf8907fc 2 * BMP280 Combined humidity and pressure sensor library
STakayama 10:525bcf8907fc 3 *
STakayama 10:525bcf8907fc 4 * @author Toyomasa Watarai
STakayama 10:525bcf8907fc 5 * @version 1.0
STakayama 10:525bcf8907fc 6 * @date 06-April-2015
STakayama 10:525bcf8907fc 7 *
STakayama 10:525bcf8907fc 8 * Library for "BMP280 temperature, humidity and pressure sensor module" from Switch Science
STakayama 10:525bcf8907fc 9 * https://www.switch-science.com/catalog/2236/
STakayama 10:525bcf8907fc 10 *
STakayama 10:525bcf8907fc 11 * For more information about the BMP280:
STakayama 10:525bcf8907fc 12 * http://ae-bst.resource.bosch.com/media/products/dokumente/BMP280/BST-BMP280_DS001-10.pdf
STakayama 10:525bcf8907fc 13 */
STakayama 10:525bcf8907fc 14
STakayama 10:525bcf8907fc 15 #include "mbed.h"
STakayama 10:525bcf8907fc 16 #include "BMP280.h"
STakayama 10:525bcf8907fc 17
STakayama 10:525bcf8907fc 18 BMP280::BMP280(PinName sda, PinName scl, char slave_adr)
STakayama 10:525bcf8907fc 19 :
STakayama 10:525bcf8907fc 20 i2c_p(new I2C(sda, scl)),
STakayama 10:525bcf8907fc 21 i2c(*i2c_p),
STakayama 10:525bcf8907fc 22 address(slave_adr),
STakayama 10:525bcf8907fc 23 t_fine(0)
STakayama 10:525bcf8907fc 24 {
STakayama 10:525bcf8907fc 25 initialize();
STakayama 10:525bcf8907fc 26 }
STakayama 10:525bcf8907fc 27
STakayama 10:525bcf8907fc 28 BMP280::BMP280(I2C &i2c_obj, char slave_adr)
STakayama 10:525bcf8907fc 29 :
STakayama 10:525bcf8907fc 30 i2c_p(NULL),
STakayama 10:525bcf8907fc 31 i2c(i2c_obj),
STakayama 10:525bcf8907fc 32 address(slave_adr),
STakayama 10:525bcf8907fc 33 t_fine(0)
STakayama 10:525bcf8907fc 34 {
STakayama 10:525bcf8907fc 35 initialize();
STakayama 10:525bcf8907fc 36 }
STakayama 10:525bcf8907fc 37
STakayama 10:525bcf8907fc 38 BMP280::~BMP280()
STakayama 10:525bcf8907fc 39 {
STakayama 10:525bcf8907fc 40 if (NULL != i2c_p)
STakayama 10:525bcf8907fc 41 delete i2c_p;
STakayama 10:525bcf8907fc 42 }
STakayama 10:525bcf8907fc 43
STakayama 10:525bcf8907fc 44 void BMP280::initialize()
STakayama 10:525bcf8907fc 45 {
STakayama 10:525bcf8907fc 46 char cmd[18];
STakayama 10:525bcf8907fc 47
STakayama 10:525bcf8907fc 48 cmd[0] = 0xf2; // ctrl_hum
STakayama 10:525bcf8907fc 49 cmd[1] = 0x01; // Humidity oversampling x1
STakayama 10:525bcf8907fc 50 i2c.write(address, cmd, 2);
STakayama 10:525bcf8907fc 51
STakayama 10:525bcf8907fc 52 cmd[0] = 0xf4; // ctrl_meas
STakayama 10:525bcf8907fc 53 cmd[1] = 0x27; // Temparature oversampling x1, Pressure oversampling x1, Normal mode
STakayama 10:525bcf8907fc 54 i2c.write(address, cmd, 2);
STakayama 10:525bcf8907fc 55
STakayama 10:525bcf8907fc 56 cmd[0] = 0xf5; // config
STakayama 10:525bcf8907fc 57 cmd[1] = 0xa0; // Standby 1000ms, Filter off
STakayama 10:525bcf8907fc 58 i2c.write(address, cmd, 2);
STakayama 10:525bcf8907fc 59
STakayama 10:525bcf8907fc 60 cmd[0] = 0x88; // read dig_T regs
STakayama 10:525bcf8907fc 61 i2c.write(address, cmd, 1);
STakayama 10:525bcf8907fc 62 i2c.read(address, cmd, 6);
STakayama 10:525bcf8907fc 63
STakayama 10:525bcf8907fc 64 dig_T1 = (cmd[1] << 8) | cmd[0];
STakayama 10:525bcf8907fc 65 dig_T2 = (cmd[3] << 8) | cmd[2];
STakayama 10:525bcf8907fc 66 dig_T3 = (cmd[5] << 8) | cmd[4];
STakayama 10:525bcf8907fc 67
STakayama 10:525bcf8907fc 68 DEBUG_PRINT("dig_T = 0x%x, 0x%x, 0x%x\n", dig_T1, dig_T2, dig_T3);
STakayama 10:525bcf8907fc 69
STakayama 10:525bcf8907fc 70 cmd[0] = 0x8E; // read dig_P regs
STakayama 10:525bcf8907fc 71 i2c.write(address, cmd, 1);
STakayama 10:525bcf8907fc 72 i2c.read(address, cmd, 18);
STakayama 10:525bcf8907fc 73
STakayama 10:525bcf8907fc 74 dig_P1 = (cmd[ 1] << 8) | cmd[ 0];
STakayama 10:525bcf8907fc 75 dig_P2 = (cmd[ 3] << 8) | cmd[ 2];
STakayama 10:525bcf8907fc 76 dig_P3 = (cmd[ 5] << 8) | cmd[ 4];
STakayama 10:525bcf8907fc 77 dig_P4 = (cmd[ 7] << 8) | cmd[ 6];
STakayama 10:525bcf8907fc 78 dig_P5 = (cmd[ 9] << 8) | cmd[ 8];
STakayama 10:525bcf8907fc 79 dig_P6 = (cmd[11] << 8) | cmd[10];
STakayama 10:525bcf8907fc 80 dig_P7 = (cmd[13] << 8) | cmd[12];
STakayama 10:525bcf8907fc 81 dig_P8 = (cmd[15] << 8) | cmd[14];
STakayama 10:525bcf8907fc 82 dig_P9 = (cmd[17] << 8) | cmd[16];
STakayama 10:525bcf8907fc 83
STakayama 10:525bcf8907fc 84 DEBUG_PRINT("dig_P = 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", dig_P1, dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9);
STakayama 10:525bcf8907fc 85
STakayama 10:525bcf8907fc 86 /* cmd[0] = 0xA1; // read dig_H regs
STakayama 10:525bcf8907fc 87 i2c.write(address, cmd, 1);
STakayama 10:525bcf8907fc 88 i2c.read(address, cmd, 1);
STakayama 10:525bcf8907fc 89 cmd[1] = 0xE1; // read dig_H regs
STakayama 10:525bcf8907fc 90 i2c.write(address, &cmd[1], 1);
STakayama 10:525bcf8907fc 91 i2c.read(address, &cmd[1], 7);
STakayama 10:525bcf8907fc 92
STakayama 10:525bcf8907fc 93 dig_H1 = cmd[0];
STakayama 10:525bcf8907fc 94 dig_H2 = (cmd[2] << 8) | cmd[1];
STakayama 10:525bcf8907fc 95 dig_H3 = cmd[3];
STakayama 10:525bcf8907fc 96 dig_H4 = (cmd[4] << 4) | (cmd[5] & 0x0f);
STakayama 10:525bcf8907fc 97 dig_H5 = (cmd[6] << 4) | ((cmd[5]>>4) & 0x0f);
STakayama 10:525bcf8907fc 98 dig_H6 = cmd[7];
STakayama 10:525bcf8907fc 99
STakayama 10:525bcf8907fc 100 DEBUG_PRINT("dig_H = 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", dig_H1, dig_H2, dig_H3, dig_H4, dig_H5, dig_H6);
STakayama 10:525bcf8907fc 101 */
STakayama 10:525bcf8907fc 102 }
STakayama 10:525bcf8907fc 103
STakayama 10:525bcf8907fc 104 float BMP280::getTemperature()
STakayama 10:525bcf8907fc 105 {
STakayama 10:525bcf8907fc 106 uint32_t temp_raw;
STakayama 10:525bcf8907fc 107 float tempf;
STakayama 10:525bcf8907fc 108 char cmd[4];
STakayama 10:525bcf8907fc 109
STakayama 10:525bcf8907fc 110 cmd[0] = 0xfa; // temp_msb
STakayama 10:525bcf8907fc 111 i2c.write(address, cmd, 1);
STakayama 10:525bcf8907fc 112 i2c.read(address, &cmd[1], 3);
STakayama 10:525bcf8907fc 113
STakayama 10:525bcf8907fc 114 temp_raw = (cmd[1] << 12) | (cmd[2] << 4) | (cmd[3] >> 4);
STakayama 10:525bcf8907fc 115
STakayama 10:525bcf8907fc 116 int32_t temp;
STakayama 10:525bcf8907fc 117
STakayama 10:525bcf8907fc 118 temp =
STakayama 10:525bcf8907fc 119 (((((temp_raw >> 3) - (dig_T1 << 1))) * dig_T2) >> 11) +
STakayama 10:525bcf8907fc 120 ((((((temp_raw >> 4) - dig_T1) * ((temp_raw >> 4) - dig_T1)) >> 12) * dig_T3) >> 14);
STakayama 10:525bcf8907fc 121
STakayama 10:525bcf8907fc 122 t_fine = temp;
STakayama 10:525bcf8907fc 123 temp = (temp * 5 + 128) >> 8;
STakayama 10:525bcf8907fc 124 tempf = (float)temp;
STakayama 10:525bcf8907fc 125
STakayama 10:525bcf8907fc 126 return (tempf/100.0f);
STakayama 10:525bcf8907fc 127 }
STakayama 10:525bcf8907fc 128
STakayama 10:525bcf8907fc 129 float BMP280::getPressure()
STakayama 10:525bcf8907fc 130 {
STakayama 10:525bcf8907fc 131 uint32_t press_raw;
STakayama 10:525bcf8907fc 132 float pressf;
STakayama 10:525bcf8907fc 133 char cmd[4];
STakayama 10:525bcf8907fc 134
STakayama 10:525bcf8907fc 135 cmd[0] = 0xf7; // press_msb
STakayama 10:525bcf8907fc 136 i2c.write(address, cmd, 1);
STakayama 10:525bcf8907fc 137 i2c.read(address, &cmd[1], 3);
STakayama 10:525bcf8907fc 138
STakayama 10:525bcf8907fc 139 press_raw = (cmd[1] << 12) | (cmd[2] << 4) | (cmd[3] >> 4);
STakayama 10:525bcf8907fc 140
STakayama 10:525bcf8907fc 141 int32_t var1, var2;
STakayama 10:525bcf8907fc 142 uint32_t press;
STakayama 10:525bcf8907fc 143
STakayama 10:525bcf8907fc 144 var1 = (t_fine >> 1) - 64000;
STakayama 10:525bcf8907fc 145 var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) * dig_P6;
STakayama 10:525bcf8907fc 146 var2 = var2 + ((var1 * dig_P5) << 1);
STakayama 10:525bcf8907fc 147 var2 = (var2 >> 2) + (dig_P4 << 16);
STakayama 10:525bcf8907fc 148 var1 = (((dig_P3 * (((var1 >> 2)*(var1 >> 2)) >> 13)) >> 3) + ((dig_P2 * var1) >> 1)) >> 18;
STakayama 10:525bcf8907fc 149 var1 = ((32768 + var1) * dig_P1) >> 15;
STakayama 10:525bcf8907fc 150 if (var1 == 0) {
STakayama 10:525bcf8907fc 151 return 0;
STakayama 10:525bcf8907fc 152 }
STakayama 10:525bcf8907fc 153 press = (((1048576 - press_raw) - (var2 >> 12))) * 3125;
STakayama 10:525bcf8907fc 154 if(press < 0x80000000) {
STakayama 10:525bcf8907fc 155 press = (press << 1) / var1;
STakayama 10:525bcf8907fc 156 } else {
STakayama 10:525bcf8907fc 157 press = (press / var1) * 2;
STakayama 10:525bcf8907fc 158 }
STakayama 10:525bcf8907fc 159 var1 = ((int32_t)dig_P9 * ((int32_t)(((press >> 3) * (press >> 3)) >> 13))) >> 12;
STakayama 10:525bcf8907fc 160 var2 = (((int32_t)(press >> 2)) * (int32_t)dig_P8) >> 13;
STakayama 10:525bcf8907fc 161 press = (press + ((var1 + var2 + dig_P7) >> 4));
STakayama 10:525bcf8907fc 162
STakayama 10:525bcf8907fc 163 pressf = (float)press;
STakayama 10:525bcf8907fc 164 return (pressf/100.0f);
STakayama 10:525bcf8907fc 165 }