From 05e90da8462f4166ac942c9833bb06f2b1971f27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zeng=20wei=20=28=E6=9B=BE=E5=A8=81=29?= <zeng32@qq.com>
Date: Sun, 14 Apr 2024 14:32:26 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E4=B8=80=E6=AC=A1=E6=8E=A5=E5=85=A5ou?=
 =?UTF-8?q?t=5Ftem?=
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---
 HARDWARE/PID.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/HARDWARE/PID.c b/HARDWARE/PID.c
index c15307b..cc11033 100644
--- a/HARDWARE/PID.c
+++ b/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);