104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
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#include "adc.h"
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#include "temp_cal.h"
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#include "sysinfo.h"
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#include "u_sys.h"
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#include "relay.h"
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#include <math.h>
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#define TEMP_ADJUST_TIMES 6000 // ms
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// Rt = R *EXP(B*(1/T1-1/T2))
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// 这里T1和T2指的是K度即开尔文温度，K度=273.15(绝对温度)+摄氏度；其中T2=(273.15+25)
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// Rt 是热敏电阻在T1温度下的阻值；
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// R是热敏电阻在T2常温下的标称阻值；
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// B值是热敏电阻的重要参数；
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// EXP是e的n次方；
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const float Rp = 10000.0; // 10K
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const float T2 = (273.15 + 25.0); // T2
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const float Bx = 3950.0; // B
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const float Ka = 273.15;
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// 根据电阻值计算温度值
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float get_temp(int resistor)
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{
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float Rt;
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float temp;
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Rt = resistor;
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// like this R=5000, T2=273.15+25,B=3470, RT=5000*EXP(3470*(1/T1-1/(273.15+25)),
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temp = Rt / Rp;
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temp = log(temp); // ln(Rt/Rp)
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temp /= Bx; // ln(Rt/Rp)/B
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temp += (1 / T2);
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temp = 1 / (temp);
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temp -= Ka;
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return temp;
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}
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#define RES_CAL(a) ((double)((a)) / (((3.3 - a) / 10000.0)))
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#define TEMPS_NUMBET 4 // 六路温度
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#define TEP_CAP_COUNT 50 // 15次平均
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u32 adc_cap_val[TEMPS_NUMBET] = {0};
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u16 adc_count = 0;
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void temps_cal(void)
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{
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u8 i;
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for (i = 0; i < TEMPS_NUMBET; i++)
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{
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adc_cap_val[i] += ADCConvertedValue[i];
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}
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adc_count++;
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if (adc_count >= TEP_CAP_COUNT)
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{
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adc_count = 0;
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for (i = 0; i < TEMPS_NUMBET; i++)
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{
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adc_cap_val[i] /= TEP_CAP_COUNT;
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}
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sys_info.temp[0] = get_temp(RES_CAL(((double)adc_cap_val[0] / 4096.) * 3.3));
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sys_info.temp[1] = get_temp(RES_CAL(((double)adc_cap_val[1] / 4096.) * 3.3));
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sys_info.temp[2] = get_temp(RES_CAL(((double)adc_cap_val[2] / 4096.) * 3.3));
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sys_info.temp[3] = get_temp(RES_CAL(((double)adc_cap_val[3] / 4096.) * 3.3));
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sys_info.temp[4] = get_temp(RES_CAL(((double)adc_cap_val[4] / 4096.) * 3.3));
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sys_info.temp[5] = get_temp(RES_CAL(((double)adc_cap_val[5] / 4096.) * 3.3));
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for (i = 0; i < TEMPS_NUMBET; i++)
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{
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if (sys_info.temp[i] < TEMP_MIN_VAL)
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{
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sys_info.temp[i] = TEMP_MIN_VAL;
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}
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else if (sys_info.temp[i] > TEMP_MAX_VAL)
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{
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sys_info.temp[i] = TEMP_MAX_VAL;
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}
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}
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for (i = 0; i < TEMPS_NUMBET; i++)
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{
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adc_cap_val[i] = 0;
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}
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}
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}
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static u32 temp_adjust_tick_last_update = 0;
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void temp_cal(void)
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{
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temps_cal(); // 计算温度值 8路
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// 调温处理
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// 温度处理
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if (sys_read_tick() - temp_adjust_tick_last_update >= TEMP_ADJUST_TIMES)
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{
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temp_adjust_tick_last_update = sys_read_tick();
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if ((int)(sys_info.temp[0]) > sys_info.target_val)
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{
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relay_ctrl(5, 0);
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}
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else
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{
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relay_ctrl(5, 1);
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}
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}
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} |