VLLV (11.05.2018 23:35, просмотров: 115) ответил Vit на Upd. Я так меряю. Slope ADC в реальном применении сделан на опоре и компараторе STM32L151. 16-бит таймер, соответственно выбран конденсатор. Насчет разрешения, КМК, всё наоборотугу #include "include_ports.h"
#include "def.h"
#include "Typedef.h"
#include "ADCe.h"
#include "Temperature.h"
#include "Areas.h"
#include "Errors.h"
int temper[TEMPER_QTY];
char t_error[TEMPER_QTY];
long resistance[ADCE_QTY];
char temperature_error;
#define REF_RESISTANCE 1000000LL
#define REF_VOLTAGE 0xfffffL
#define SENSORS_5K
#define MIN_T 0 //(-1000) // minimum temperature to be calculated
#define MAX_T 8000 // maximum temperature
#define MAX_V (REF_VOLTAGE-REF_VOLTAGE/20) // maximum voltage to be processed
#define MAX_R REF_RESISTANCE*20LL
#ifdef SENSORS_10K
long __flash R_VALUE[] =
{
/* 5529800, 5238000, 4963300, 4704700, 4461000, 4231500, 4015000, 3810900, 3618300, 3436600, //-10
*/
3265080, 3103040, 2950010, 2805420, 2668760, 2539550, 2417270, 2301600, 2192170, 2088520, //0
1990350, 1897360, 1809260, 1725740, 1646510, 1571400, 1500120, 1432460, 1368260, 1305280, //10
1249370, 1194330, 1142000, 1092270, 1044990, 1000000, 957200, 916470, 877700, 840770, //20
805600, 772090, 740170, 709720, 680700, 653010, 626610, 601420, 577370, 554410, //30
532490, 511560, 491550, 472430, 454160, 436690, 419990, 404010, 388720, 374110, //40
360100, 346690, 333860, 321560, 309790, 298510, 287690, 277320, 267390, 257850, //50
248710, 239940, 231520, 223470, 215670, 208230, 201080, 194210, 187600, 181260, //60
175160, 169300, 163663, 158241, 153028, 148012, 143187, 138537, 134068, 129764, //70
125617 //80
/* , 121623, 117775, 114071, 110499, 107058, 103740, 100540, 97456, 94481,
91611, 88841, 86170, 83593, 81103, 78699, 76379, 74138, 71974, 69882, //90
67863 //100
*/
};
#endif
#ifdef SENSORS_5K
long __flash R_VALUE[] =
{
/*
2768000, 2621500, 2483600, 2353800, 2231700, 2116600, 2008200, 1906000, 1809700, 1718800, //-10
*/
1633000, 1551800, 1475100, 1402700, 1334300, 1269600, 1208400, 1150600, 1095900, 1044100, // 0
995080, 948530, 904420, 862630, 823020, 785470, 749850, 716050, 683970, 653520, //10
624600, 597080, 570940, 546090, 522470, 500000, 478610, 458250, 438880, 420440, //20
402870, 386120, 370160, 354960, 340460, 326630, 313440, 300860, 288850, 277390, //30
266450, 255980, 245990, 236430, 227300, 218580, 210230, 202250, 194620, 187310, //40
180320, 173620, 167210, 161060, 155180, 149540, 144140, 138960, 133990, 129230, //50
124660, 120280, 116070, 112030, 108160, 104430, 100860, 97419, 94117, 90943, //60
87892, 84962, 82143, 79433, 76824, 74315, 71900, 69575, 67336, 65181, //70
63104 //80
};
#endif
// NTC M891-10k 5% B57-891-M103-J
long __flash EPCOS_VALUE[]=
{
/*
5430800, //-10.0
4150500, //-5.0
*/
3201400, //0.0
2501100, //5.0
1969100, //10.0
1561800, //15.0
1247400, //20.0
1000000, //25.0
808000, //30.0
656900, //35.0
537200, //40.0
442400, //45.0
366100, //50.0
303900, //55.0
253600, //60.0
212800, //65.0
179400, //70.0
151800, //75.0
129000 /*, //80.0
// 110000 //85.0
*/
};
#define R_COUNT (sizeof (R_VALUE)/ sizeof(R_VALUE[0]))
#define EPCOS_COUNT (sizeof (EPCOS_VALUE)/ sizeof(EPCOS_VALUE[0]))
long GetResistance(long volt)
{ long resist;
long voltage;
voltage=volt&0xfffff;
if (voltage>MAX_V)
return MAX_R;
resist = (voltage * REF_RESISTANCE / (REF_VOLTAGE - voltage));
return resist;
}
char GetTemperatureError(void)
{ return temperature_error;
}
int GetTemper( long res )
{ char left = 0;
long resist;
resist=res;
if (resist > R_VALUE[0])
{ resist=R_VALUE[0];
temperature_error=erSensorDisconnected;
}
else
{
if (resist < R_VALUE[R_COUNT - 1])
{ resist=R_VALUE[R_COUNT - 1];
temperature_error=erSensorShorted;
}
else
{
temperature_error=0;
for (left=0; left<R_COUNT-2; left++)
{ if (resist>R_VALUE[left+1])
break;
}
}
}
return 100*left + 100 * (R_VALUE[left] - resist) / (R_VALUE[left] - R_VALUE[left + 1]);
}
int GetTemperEpcos( long res)
{ char left = 0;
long resist;
resist=res;
if (resist > EPCOS_VALUE[0])
resist= EPCOS_VALUE[0];
if (resist < EPCOS_VALUE[EPCOS_COUNT - 1])
resist= EPCOS_VALUE[EPCOS_COUNT - 1];
for (left=0; left<EPCOS_COUNT-2; left++)
{ if (resist>EPCOS_VALUE[left+1]) break; }
return 500* left + 500 * (EPCOS_VALUE[left] - resist) / (EPCOS_VALUE[left] - EPCOS_VALUE[left + 1]);
}
#define s1 ((long)se.point1_disp)
#define s2 ((long)se.point2_disp)
#define a1 ((long)se.point1_real-(long)se.point1_disp)
#define a2 ((long)se.point2_real-(long)se.point2_disp)
signed int GetAdjustment(signed int my_temper)
{ // adjustment = (X*sensor_temper)/factor + Y
static long factor=1000;
static long corr;
static long X;
static int Y;
X = (signed int) ( ( factor * (a1-a2) ) / (s1-s2) );
Y = (signed int) ( (10*(s2*a1 - s1*a2))/(s2-s1) );
corr= ((long)my_temper * X)/factor + Y;
return (int)corr;
}
void TemperService1s(void)
{
resistance[ADCE_WATER]=GetResistance(adce_results[ADCE_WATER]);
temper[SENSOR_TEMPER]=GetTemper(resistance[ADCE_WATER]);
temper[ACTUAL_TEMPER]=temper[SENSOR_TEMPER]+GetAdjustment(temper[SENSOR_TEMPER]);
/* temper[AMBIENT_TEMPER]=se.ambient*10;
temper[ACTUAL_TEMPER]=temper[ADJUSTED_TEMPER]+
( (long)(temper[AMBIENT_TEMPER]-temper[ADJUSTED_TEMPER])*
se.temper_slope
)/1000;
*/
if (adce_qty>ADCE_PCB)
{ resistance[ADCE_PCB]=GetResistance(adce_results[ADCE_PCB]);
temper[PCB_TEMPER]=GetTemperEpcos(resistance[ADCE_PCB]);
}
if (adce_qty>ADCE_ST4)
resistance[ADCE_ST4]=GetResistance(adce_results[ADCE_ST4]);
else
resistance[ADCE_ST4]=0;
}