Diff: main.cpp

Revision:

12:c7c1603ec7fe

Parent:

11:0309bef74ba8

Child:

13:6cb633e5010a

--- a/main.cpp	Wed Feb 15 14:04:02 2017 -0600
+++ b/main.cpp	Sat May 01 21:25:40 2021 +0000
@@ -1,22 +1,169 @@
-#include "mbed.h"
-#include "rtos.h"
- 
-DigitalOut led1(LED1);
-DigitalOut led2(LED2);
-Thread thread;
- 
-void led2_thread() {
-    while (true) {
-        led2 = !led2;
-        Thread::wait(1000);
-    }
-}
- 
-int main() {
-    thread.start(led2_thread);
-    
-    while (true) {
-        led1 = !led1;
-        Thread::wait(500);
-    }
-}
+#include "mbed.h"
+#include "DHT.h"
+#include "uLCD_4DGL.h"
+#include "rtos.h"
+#include "PinDetect.h"
+#include "Servo.h"
+
+uLCD_4DGL lcd(p13,p14,p19); // serial tx, serial rx, reset pin;
+DHT dht(p18, DHT22);
+PinDetect bt1(p8);
+PinDetect bt2(p7);
+PinDetect bt3(p6);
+Servo servo(p21);
+Mutex lcd_mutex;
+Serial blue(p28, p27);      //Bluetooth Module
+
+
+float humidity;
+volatile float set_temp, curr_temp;
+volatile bool AC_on;
+
+// two interrupts for updating the set temperature
+void increment_temp() {
+    if (set_temp <= 29.5)
+        set_temp += 0.5;
+}
+
+void decrement_temp() {
+    if (set_temp >= 16.5)
+        set_temp -= 0.5;
+}
+
+// thread 1, for updating the temperature printout on LCD
+void temp_update() {
+     while (1) {
+         lcd_mutex.lock();
+            lcd.color(WHITE);
+            lcd.set_font_size(2, 2);
+            lcd.locate(0, 2);
+            lcd.printf("%.1f ", set_temp);
+        lcd_mutex.unlock();   
+        
+        Thread::wait(500);
+    }
+}
+
+// thread 2, for comparing temperature and controlling the servo
+void servo_control() {
+    while (1) {
+        if (curr_temp >= set_temp + 1.0f) {
+            servo = 1;
+            lcd_mutex.lock();
+                lcd.locate(5, 6);
+                lcd.color(RED);
+                lcd.printf("ON ");
+            lcd_mutex.unlock();
+//            Thread::wait(60 * 1000);  // lock the action for at least 1 minute
+            continue;
+        } 
+        
+        if (curr_temp <= set_temp - 1.0f) {
+            servo = -1;
+            lcd_mutex.lock();
+                lcd.locate(5, 6);
+                lcd.color(RED);
+                lcd.printf("OFF");
+            lcd_mutex.unlock();  
+        }
+        
+        Thread::wait(1000);   
+    }
+}
+
+// thread 3, for monitoring bluetooth device and update temperature
+void bluetooth_control() {
+    while (1) {
+//        printf("hey");
+        if (blue.readable()) {
+            printf("blue is readable\n");
+            if (blue.getc() == 's') {
+                if (blue.getc() == 'e') {
+                    if (blue.getc() == 't') {
+//                        if (blue.getc() == ' ') {
+                            printf("here!\n");
+                            char msg[5];
+                            msg[0] = blue.getc();
+                            msg[1] = blue.getc();
+                            msg[2] = blue.getc();
+                            msg[3] = blue.getc();
+                            msg[4] = '\0';
+                            
+                            sscanf(msg, "%f", &set_temp);
+                            printf("%s", msg);
+//                        }
+                    }
+                }
+            }
+        }
+        Thread::yield();
+    }   
+}
+
+int main() {
+    servo = 0;
+    blue.baud(9600);
+    
+    bt1.mode(PullUp);
+    bt2.mode(PullUp);
+    bt3.mode(PullUp);
+    bt1.attach_deasserted(&increment_temp);
+    bt2.attach_deasserted(&decrement_temp);
+
+    bt1.setSampleFrequency();
+    bt2.setSampleFrequency();
+    bt3.setSampleFrequency();
+    
+    set_temp = 25;
+    /////////////////////////
+    lcd.filled_rectangle(5, 0, 60, 4, WHITE);
+    lcd.filled_rectangle(65, 0, 125, 4, GREEN);
+    lcd.filled_rectangle(5, 70, 60, 74, BLUE);
+    lcd.filled_rectangle(65, 70, 125, 74, RED);
+    /////////////////////////
+    lcd.text_width(2);
+    lcd.text_height(2);
+    lcd.locate(0, 1);
+    lcd.color(WHITE);
+    lcd.printf(" SET ");
+    lcd.color(GREEN);
+    lcd.printf("CUR");
+    lcd.locate(0, 5);
+    lcd.color(BLUE);
+    lcd.printf(" HUM ");
+    lcd.color(RED);
+    lcd.printf("ACT");
+    
+    Thread t1;
+    Thread t2;
+    Thread t3;
+    
+    t1.start(&temp_update);
+    t2.start(&servo_control);
+    t3.start(&bluetooth_control);
+    
+    int code;
+    
+    // main thread, for updating temperature and humidity printouts on LCD
+    while (1) {
+        code = dht.readData();  // error detection code for DHT22
+//        if (code != 0)
+//            continue;
+            
+//        printf("code=%d\n", code);
+        curr_temp = dht.ReadTemperature(CELCIUS);
+        humidity = dht.ReadHumidity();
+        
+        lcd_mutex.lock();
+            lcd.locate(5, 2);
+            lcd.color(GREEN);
+            lcd.printf("%.1f", curr_temp);
+            
+            lcd.locate(0, 6);
+            lcd.color(BLUE);
+            lcd.printf(" %.0f%%", humidity);
+        lcd_mutex.unlock();
+        
+        Thread::wait(2000);   
+    }
+}