mirror of
https://github.com/meshcore-dev/MeshCore.git
synced 2026-04-27 00:32:25 +00:00
Florent
119 lines
3.5 KiB
C++
119 lines
3.5 KiB
C++
#include <Arduino.h>
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#include "t1000e_sensors.h"
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#define HEATER_NTC_BX 4250 // thermistor coefficient B
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#define HEATER_NTC_RP 8250 // ohm, series resistance to thermistor
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#define HEATER_NTC_KA 273.15 // 25 Celsius at Kelvin
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#define NTC_REF_VCC 3000 // mV, output voltage of LDO
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#define LIGHT_REF_VCC 2400 //
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static unsigned int ntc_res2[136]={
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113347,107565,102116,96978,92132,87559,83242,79166,75316,71677,
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68237,64991,61919,59011,56258,53650,51178,48835,46613,44506,
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42506,40600,38791,37073,35442,33892,32420,31020,29689,28423,
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27219,26076,24988,23951,22963,22021,21123,20267,19450,18670,
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17926,17214,16534,15886,15266,14674,14108,13566,13049,12554,
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12081,11628,11195,10780,10382,10000,9634,9284,8947,8624,
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8315,8018,7734,7461,7199,6948,6707,6475,6253,6039,
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5834,5636,5445,5262,5086,4917,4754,4597,4446,4301,
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4161,4026,3896,3771,3651,3535,3423,3315,3211,3111,
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3014,2922,2834,2748,2666,2586,2509,2435,2364,2294,
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2228,2163,2100,2040,1981,1925,1870,1817,1766,1716,
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1669,1622,1578,1535,1493,1452,1413,1375,1338,1303,
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1268,1234,1202,1170,1139,1110,1081,1053,1026,999,
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974,949,925,902,880,858,
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};
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static char ntc_temp2[136]=
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{
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-30,-29,-28,-27,-26,-25,-24,-23,-22,-21,
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-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,
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-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,
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0,1,2,3,4,5,6,7,8,9,
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10,11,12,13,14,15,16,17,18,19,
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20,21,22,23,24,25,26,27,28,29,
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30,31,32,33,34,35,36,37,38,39,
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40,41,42,43,44,45,46,47,48,49,
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50,51,52,53,54,55,56,57,58,59,
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60,61,62,63,64,65,66,67,68,69,
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70,71,72,73,74,75,76,77,78,79,
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80,81,82,83,84,85,86,87,88,89,
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90,91,92,93,94,95,96,97,98,99,
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100,101,102,103,104,105,
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};
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static float get_heater_temperature( unsigned int vcc_volt, unsigned int ntc_volt )
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{
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int i = 0;
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float Vout = 0, Rt = 0, temp = 0;
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Vout = ntc_volt;
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Rt = ( HEATER_NTC_RP * vcc_volt ) / Vout - HEATER_NTC_RP;
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for( i = 0; i < 136; i++ )
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{
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if( Rt >= ntc_res2[i] )
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{
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break;
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}
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}
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temp = ntc_temp2[i - 1] + 1 * ( ntc_res2[i - 1] - Rt ) / ( float )( ntc_res2[i - 1] - ntc_res2[i] );
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temp = ( temp * 100 + 5 ) / 100;
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return temp;
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}
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static int get_light_lv( unsigned int light_volt )
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{
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float Vout = 0, Vin = 0, Rt = 0, temp = 0;
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unsigned int light_level = 0;
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if( light_volt <= 80 )
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{
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light_level = 0;
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return light_level;
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}
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else if( light_volt >= 2480 )
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{
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light_level = 100;
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return light_level;
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}
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Vout = light_volt;
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light_level = 100 * ( Vout - 80 ) / LIGHT_REF_VCC;
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return light_level;
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}
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float t1000e_get_temperature( void )
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{
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unsigned int ntc_v, vcc_v;
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digitalWrite(PIN_3V3_EN, HIGH);
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digitalWrite(SENSOR_EN, HIGH);
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analogReference(AR_INTERNAL_3_0);
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analogReadResolution(12);
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delay(10);
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vcc_v = (1000.0*(analogRead(BATTERY_PIN) * ADC_MULTIPLIER * AREF_VOLTAGE)) / 4096;
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ntc_v = (1000.0 * AREF_VOLTAGE * analogRead(TEMP_SENSOR)) / 4096;
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digitalWrite(PIN_3V3_EN, LOW);
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digitalWrite(SENSOR_EN, LOW);
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return get_heater_temperature (vcc_v, ntc_v);
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}
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uint32_t t1000e_get_light( void )
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{
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int lux = 0;
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unsigned int lux_v = 0;
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digitalWrite(SENSOR_EN, HIGH);
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analogReference(AR_INTERNAL_3_0);
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analogReadResolution(12);
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delay(10);
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lux_v = 1000 * analogRead(LUX_SENSOR) * AREF_VOLTAGE / 4096;
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lux = get_light_lv( lux_v );
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digitalWrite(SENSOR_EN, LOW);
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return lux;
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} |