Samira Afzal / Lora_SX1272_Coragem-dev-shared

p2p-pingpong-clickbutton

Dependencies:   PingPong-P2P-ClickButtonToWork-SX1272 Lora_SX1272_Coragem

bme280.txt@6:c305f2aa79a4, 2021-03-17 (annotated)

Committer:
afzalsamira
Date:
Wed Mar 17 20:14:13 2021 +0000
Revision:
6:c305f2aa79a4
Parent:
5:ef21a65a3450 
p2p-clickbuttonToPpingPong

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcoantonioara 5:ef21a65a3450 1
marcoantonioara 5:ef21a65a3450 2 I2C sensor(p13, p15);
marcoantonioara 5:ef21a65a3450 3 const int BME280_ADDR = (0x77 << 1);
marcoantonioara 5:ef21a65a3450 4
marcoantonioara 5:ef21a65a3450 5 ///////////////////////////////////////
marcoantonioara 5:ef21a65a3450 6 // Globals variables
marcoantonioara 5:ef21a65a3450 7 ///////////////////////////////////////
marcoantonioara 5:ef21a65a3450 8
marcoantonioara 5:ef21a65a3450 9 char cmd_bme[18];
marcoantonioara 5:ef21a65a3450 10 uint32_t hum_raw;
marcoantonioara 5:ef21a65a3450 11 float humf;
marcoantonioara 5:ef21a65a3450 12 uint32_t temp_raw;
marcoantonioara 5:ef21a65a3450 13 float tempf;
marcoantonioara 5:ef21a65a3450 14 uint32_t press_raw;
marcoantonioara 5:ef21a65a3450 15 float pressf;
marcoantonioara 5:ef21a65a3450 16 //char cmd[4];
marcoantonioara 5:ef21a65a3450 17 uint16_t dig_T1,dig_P1,dig_H1, dig_H3;
marcoantonioara 5:ef21a65a3450 18 int16_t dig_T2, dig_T3,dig_P2, dig_P3, dig_P4, dig_P5, dig_P6, dig_P7, dig_P8, dig_P9,dig_H2, dig_H4, dig_H5, dig_H6;
marcoantonioara 5:ef21a65a3450 19 int32_t t_fine;
marcoantonioara 5:ef21a65a3450 20
marcoantonioara 5:ef21a65a3450 21
marcoantonioara 5:ef21a65a3450 22 void bme_init() { //bme initialization
marcoantonioara 5:ef21a65a3450 23
marcoantonioara 5:ef21a65a3450 24 sensor.frequency(1000000);
marcoantonioara 5:ef21a65a3450 25
marcoantonioara 5:ef21a65a3450 26 cmd_bme[0] = 0xf2; // ctrl_hum
marcoantonioara 5:ef21a65a3450 27 cmd_bme[1] = 0x01;
marcoantonioara 5:ef21a65a3450 28 sensor.write(BME280_ADDR, cmd_bme, 2);
marcoantonioara 5:ef21a65a3450 29
marcoantonioara 5:ef21a65a3450 30 cmd_bme[0] = 0xf4; // ctrl_meas
marcoantonioara 5:ef21a65a3450 31 cmd_bme[1] = 0x27;
marcoantonioara 5:ef21a65a3450 32 sensor.write(BME280_ADDR, cmd_bme, 2);
marcoantonioara 5:ef21a65a3450 33
marcoantonioara 5:ef21a65a3450 34 cmd_bme[0] = 0xf5; // config
marcoantonioara 5:ef21a65a3450 35 cmd_bme[1] = 0xa0;
marcoantonioara 5:ef21a65a3450 36 sensor.write(BME280_ADDR, cmd_bme, 2);
marcoantonioara 5:ef21a65a3450 37
marcoantonioara 5:ef21a65a3450 38 cmd_bme[0] = 0x88; // read dig_T regs
marcoantonioara 5:ef21a65a3450 39 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 40 sensor.read(BME280_ADDR, cmd_bme, 6);
marcoantonioara 5:ef21a65a3450 41
marcoantonioara 5:ef21a65a3450 42 dig_T1 = (cmd_bme[1] << 8) | cmd_bme[0];
marcoantonioara 5:ef21a65a3450 43 dig_T2 = (cmd_bme[3] << 8) | cmd_bme[2];
marcoantonioara 5:ef21a65a3450 44 dig_T3 = (cmd_bme[5] << 8) | cmd_bme[4];
marcoantonioara 5:ef21a65a3450 45
marcoantonioara 5:ef21a65a3450 46 // DEBUG_PRINT("dig_T = 0x%x, 0x%x, 0x%x\n", dig_T1, dig_T2, dig_T3);
marcoantonioara 5:ef21a65a3450 47
marcoantonioara 5:ef21a65a3450 48 cmd_bme[0] = 0x8E; // read dig_P regs
marcoantonioara 5:ef21a65a3450 49 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 50 sensor.read(BME280_ADDR, cmd_bme, 18);
marcoantonioara 5:ef21a65a3450 51
marcoantonioara 5:ef21a65a3450 52 dig_P1 = (cmd_bme[ 1] << 8) | cmd_bme[ 0];
marcoantonioara 5:ef21a65a3450 53 dig_P2 = (cmd_bme[ 3] << 8) | cmd_bme[ 2];
marcoantonioara 5:ef21a65a3450 54 dig_P3 = (cmd_bme[ 5] << 8) | cmd_bme[ 4];
marcoantonioara 5:ef21a65a3450 55 dig_P4 = (cmd_bme[ 7] << 8) | cmd_bme[ 6];
marcoantonioara 5:ef21a65a3450 56 dig_P5 = (cmd_bme[ 9] << 8) | cmd_bme[ 8];
marcoantonioara 5:ef21a65a3450 57 dig_P6 = (cmd_bme[11] << 8) | cmd_bme[10];
marcoantonioara 5:ef21a65a3450 58 dig_P7 = (cmd_bme[13] << 8) | cmd_bme[12];
marcoantonioara 5:ef21a65a3450 59 dig_P8 = (cmd_bme[15] << 8) | cmd_bme[14];
marcoantonioara 5:ef21a65a3450 60 dig_P9 = (cmd_bme[17] << 8) | cmd_bme[16];
marcoantonioara 5:ef21a65a3450 61
marcoantonioara 5:ef21a65a3450 62 // 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);
marcoantonioara 5:ef21a65a3450 63
marcoantonioara 5:ef21a65a3450 64 cmd_bme[0] = 0xA1; // read dig_H regs
marcoantonioara 5:ef21a65a3450 65 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 66 sensor.read(BME280_ADDR, cmd_bme, 9);
marcoantonioara 5:ef21a65a3450 67
marcoantonioara 5:ef21a65a3450 68 dig_H1 = cmd_bme[0];
marcoantonioara 5:ef21a65a3450 69 dig_H2 = (cmd_bme[2] << 8) | cmd_bme[1];
marcoantonioara 5:ef21a65a3450 70 dig_H3 = cmd_bme[3];
marcoantonioara 5:ef21a65a3450 71 dig_H4 = (cmd_bme[4] << 4) | (cmd_bme[5] & 0x0f);
marcoantonioara 5:ef21a65a3450 72 dig_H5 = (cmd_bme[7] << 4) | ((cmd_bme[6]>>4) & 0x0f);
marcoantonioara 5:ef21a65a3450 73 dig_H6 = cmd_bme[8];
marcoantonioara 5:ef21a65a3450 74
marcoantonioara 5:ef21a65a3450 75 // 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);
marcoantonioara 5:ef21a65a3450 76 }
marcoantonioara 5:ef21a65a3450 77
marcoantonioara 5:ef21a65a3450 78 float getTemperature(){
marcoantonioara 5:ef21a65a3450 79
marcoantonioara 5:ef21a65a3450 80
marcoantonioara 5:ef21a65a3450 81 cmd_bme[0] = 0xfa; // temp_msb
marcoantonioara 5:ef21a65a3450 82 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 83 sensor.read(BME280_ADDR, &cmd_bme[1], 1);
marcoantonioara 5:ef21a65a3450 84
marcoantonioara 5:ef21a65a3450 85 cmd_bme[0] = 0xfb; // temp_lsb
marcoantonioara 5:ef21a65a3450 86 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 87 sensor.read(BME280_ADDR, &cmd_bme[2], 1);
marcoantonioara 5:ef21a65a3450 88
marcoantonioara 5:ef21a65a3450 89 cmd_bme[0] = 0xfc; // temp_xlsb
marcoantonioara 5:ef21a65a3450 90 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 91 sensor.read(BME280_ADDR, &cmd_bme[3], 1);
marcoantonioara 5:ef21a65a3450 92
marcoantonioara 5:ef21a65a3450 93 temp_raw = (cmd_bme[1] << 12) | (cmd_bme[2] << 4) | (cmd_bme[3] >> 4);
marcoantonioara 5:ef21a65a3450 94
marcoantonioara 5:ef21a65a3450 95 int32_t temp;
marcoantonioara 5:ef21a65a3450 96
marcoantonioara 5:ef21a65a3450 97 temp =
marcoantonioara 5:ef21a65a3450 98 (((((temp_raw >> 3) - (dig_T1 << 1))) * dig_T2) >> 11) +
marcoantonioara 5:ef21a65a3450 99 ((((((temp_raw >> 4) - dig_T1) * ((temp_raw >> 4) - dig_T1)) >> 12) * dig_T3) >> 14);
marcoantonioara 5:ef21a65a3450 100
marcoantonioara 5:ef21a65a3450 101 t_fine = temp;
marcoantonioara 5:ef21a65a3450 102 temp = (temp * 5 + 128) >> 8;
marcoantonioara 5:ef21a65a3450 103 tempf = (float)temp;
marcoantonioara 5:ef21a65a3450 104
marcoantonioara 5:ef21a65a3450 105 return (tempf/100.0f);
marcoantonioara 5:ef21a65a3450 106 }
marcoantonioara 5:ef21a65a3450 107
marcoantonioara 5:ef21a65a3450 108 float getPressure(){
marcoantonioara 5:ef21a65a3450 109
marcoantonioara 5:ef21a65a3450 110 cmd_bme[0] = 0xf7; // press_msb
marcoantonioara 5:ef21a65a3450 111 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 112 sensor.read(BME280_ADDR, &cmd_bme[1], 1);
marcoantonioara 5:ef21a65a3450 113
marcoantonioara 5:ef21a65a3450 114 cmd_bme[0] = 0xf8; // press_lsb
marcoantonioara 5:ef21a65a3450 115 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 116 sensor.read(BME280_ADDR, &cmd_bme[2], 1);
marcoantonioara 5:ef21a65a3450 117
marcoantonioara 5:ef21a65a3450 118 cmd_bme[0] = 0xf9; // press_xlsb
marcoantonioara 5:ef21a65a3450 119 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 120 sensor.read(BME280_ADDR, &cmd_bme[3], 1);
marcoantonioara 5:ef21a65a3450 121
marcoantonioara 5:ef21a65a3450 122 press_raw = (cmd_bme[1] << 12) | (cmd_bme[2] << 4) | (cmd_bme[3] >> 4);
marcoantonioara 5:ef21a65a3450 123
marcoantonioara 5:ef21a65a3450 124 int32_t var1, var2;
marcoantonioara 5:ef21a65a3450 125 uint32_t press;
marcoantonioara 5:ef21a65a3450 126
marcoantonioara 5:ef21a65a3450 127 var1 = (t_fine >> 1) - 64000;
marcoantonioara 5:ef21a65a3450 128 var2 = (((var1 >> 2) * (var1 >> 2)) >> 11) * dig_P6;
marcoantonioara 5:ef21a65a3450 129 var2 = var2 + ((var1 * dig_P5) << 1);
marcoantonioara 5:ef21a65a3450 130 var2 = (var2 >> 2) + (dig_P4 << 16);
marcoantonioara 5:ef21a65a3450 131 var1 = (((dig_P3 * (((var1 >> 2)*(var1 >> 2)) >> 13)) >> 3) + ((dig_P2 * var1) >> 1)) >> 18;
marcoantonioara 5:ef21a65a3450 132 var1 = ((32768 + var1) * dig_P1) >> 15;
marcoantonioara 5:ef21a65a3450 133 if (var1 == 0) {
marcoantonioara 5:ef21a65a3450 134 return 0;
marcoantonioara 5:ef21a65a3450 135 }
marcoantonioara 5:ef21a65a3450 136 press = (((1048576 - press_raw) - (var2 >> 12))) * 3125;
marcoantonioara 5:ef21a65a3450 137 if(press < 0x80000000) {
marcoantonioara 5:ef21a65a3450 138 press = (press << 1) / var1;
marcoantonioara 5:ef21a65a3450 139 }
marcoantonioara 5:ef21a65a3450 140 else {
marcoantonioara 5:ef21a65a3450 141 press = (press / var1) * 2;
marcoantonioara 5:ef21a65a3450 142 }
marcoantonioara 5:ef21a65a3450 143 var1 = ((int32_t)dig_P9 * ((int32_t)(((press >> 3) * (press >> 3)) >> 13))) >> 12;
marcoantonioara 5:ef21a65a3450 144 var2 = (((int32_t)(press >> 2)) * (int32_t)dig_P8) >> 13;
marcoantonioara 5:ef21a65a3450 145 press = (press + ((var1 + var2 + dig_P7) >> 4));
marcoantonioara 5:ef21a65a3450 146
marcoantonioara 5:ef21a65a3450 147 pressf = (float)press;
marcoantonioara 5:ef21a65a3450 148 return (pressf/100.0f);
marcoantonioara 5:ef21a65a3450 149 }
marcoantonioara 5:ef21a65a3450 150
marcoantonioara 5:ef21a65a3450 151 float getHumidity(){
marcoantonioara 5:ef21a65a3450 152
marcoantonioara 5:ef21a65a3450 153
marcoantonioara 5:ef21a65a3450 154 cmd_bme[0] = 0xfd; // hum_msb
marcoantonioara 5:ef21a65a3450 155 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 156 sensor.read(BME280_ADDR, &cmd_bme[1], 1);
marcoantonioara 5:ef21a65a3450 157
marcoantonioara 5:ef21a65a3450 158 cmd_bme[0] = 0xfd; // hum_lsb
marcoantonioara 5:ef21a65a3450 159 sensor.write(BME280_ADDR, cmd_bme, 1);
marcoantonioara 5:ef21a65a3450 160 sensor.read(BME280_ADDR, &cmd_bme[2], 1);
marcoantonioara 5:ef21a65a3450 161
marcoantonioara 5:ef21a65a3450 162 hum_raw = (cmd_bme[1] << 8) | cmd_bme[2];
marcoantonioara 5:ef21a65a3450 163
marcoantonioara 5:ef21a65a3450 164 int32_t v_x1;
marcoantonioara 5:ef21a65a3450 165
marcoantonioara 5:ef21a65a3450 166 v_x1 = t_fine - 76800;
marcoantonioara 5:ef21a65a3450 167 v_x1 = (((((hum_raw << 14) -(((int32_t)dig_H4) << 20) - (((int32_t)dig_H5) * v_x1)) +
marcoantonioara 5:ef21a65a3450 168 ((int32_t)16384)) >> 15) * (((((((v_x1 * (int32_t)dig_H6) >> 10) *
marcoantonioara 5:ef21a65a3450 169 (((v_x1 * ((int32_t)dig_H3)) >> 11) + 32768)) >> 10) + 2097152) *
marcoantonioara 5:ef21a65a3450 170 (int32_t)dig_H2 + 8192) >> 14));
marcoantonioara 5:ef21a65a3450 171 v_x1 = (v_x1 - (((((v_x1 >> 15) * (v_x1 >> 15)) >> 7) * (int32_t)dig_H1) >> 4));
marcoantonioara 5:ef21a65a3450 172 v_x1 = (v_x1 < 0 ? 0 : v_x1);
marcoantonioara 5:ef21a65a3450 173 v_x1 = (v_x1 > 419430400 ? 419430400 : v_x1);
marcoantonioara 5:ef21a65a3450 174
marcoantonioara 5:ef21a65a3450 175 humf = (float)(v_x1 >> 12);
marcoantonioara 5:ef21a65a3450 176
marcoantonioara 5:ef21a65a3450 177 return (humf/1024.0f);
marcoantonioara 5:ef21a65a3450 178 }