Diff: main.cpp

Revision:

2:6c5d798a1092

Parent:

1:aa2a0b18bdb1

--- a/main.cpp	Wed Jun 29 12:35:37 2022 +0000
+++ b/main.cpp	Wed Jun 29 15:21:52 2022 +0000
@@ -12,7 +12,6 @@
 #include "Adafruit_GFX.h"
 #include "Adafruit_GFX_Config.h"
 #include "Adafruit_SSD1306.h"
-#include "DHT.h"
 #include "DS1820.h"
 #include <ctype.h>
 
@@ -60,6 +59,7 @@
 // Relay selection signals
 DigitalOut relay_select1(PA_10); // D2
 DigitalOut relay_select2(PB_3); // D3
+DigitalOut fan_on(PB_5); // D3
 
 // DS1820 sensor object
 DS1820* probe[MAX_PROBES];
@@ -102,6 +102,7 @@
 {   
     char cmd = 0;
     int ref_temp = 0;
+    char regulation_on = 0;
     
     // Initialize OLED:
     myOled.begin();
@@ -138,7 +139,7 @@
             scanf("%d", &ref_temp);
             if (ref_temp > TEMP_MIN && ref_temp < TEMP_MAX)
             {
-                temp_timer.attach(&ISR_temp, TEMP_DELAY);      
+                temp_timer.attach(&ISR_temp, TEMP_DELAY); 
             }
             cmd = 0;
         }
@@ -146,8 +147,27 @@
         if (data_acquired)
         {
             refresh_display();
+            
+            if (abs(temp-ref_temp)>0.1)
+            {              
+                fan_on = 1;
+                if (temp > ref_temp)
+                {
+                    // Turn on the cooling
+                    relay_select1 = 0;
+                    relay_select2 = 1;
+                }
+                else
+                {
+                    // Turn on the heating
+                    relay_select1 = 1;
+                    relay_select2 = 0;
+                }
+            }
+                   
             data_acquired = 0;
         }
+        
     }    
 }
 
@@ -187,9 +207,9 @@
 // ISR for temperature acquisition
 void ISR_temp (void)
 {
-    printf("t\n");
     probe[0]->convertTemperature(true, DS1820::all_devices);
-    printf("It is %3.1foC\r\n", probe[0]->temperature());
+    temp =  probe[0]->temperature();
+    printf("It is %3.1foC\r\n", temp);
     data_acquired = 1;
 }