第一次接入out_tem

HARDWARE/PID.c

@@ -1,3 +1,5 @@
+#include <math.h>
+#include <stdlib.h>
 #include "PID.h"
 #include "Relays.h"
 #include "USART.h"
@@ -257,6 +259,10 @@ void PID_Calc() // pid calc
 	if (pid.set_tem > pid.max_compressor_tem) {
 	    pid.c_speed = 0;
 	} else {
+		// if outer temp is got, we calc pid by outer temp
+		if (abs(pid.out_tem) > 1e-5) {
+			pid.cp = (pid.out_tem - pid.set_tem) / 4.3 + 0.7;
+		}
 		// use nagetive error and error diff when calc compressor power
 		int p_c = calc_cp(delta_t, - Error_calc, - DelEk, pid.c_base, pid.cp, pid.ci, pid.cd);
 		pid.c_speed = calc_compressor_speed(p_c, min_speed_count, max_speed_count);