Diff: main.cpp

Revision:

0:9fc1245cb50f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 16 20:19:23 2018 +0000
@@ -0,0 +1,97 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "uLCD_4DGL.h"
+#include "wave_player.h"
+#include "SDFileSystem.h"
+
+uLCD_4DGL lcd(p28,p27,p29);        // LCD (serial tx, serial rx, reset pin;)
+//Init leds using PwmOut
+PwmOut red(p26);
+PwmOut green(p25);
+PwmOut blue(p24);
+//Analog out for speaker, and waveplayer linked to this pin
+AnalogOut DACout(p18);
+wave_player waver(&DACout);
+//SDFileSystem sd(p5, p6, p7, p8, "sd");
+// mutex to make the lcd lib thread safe
+Mutex lcd_mutex;
+
+Semaphore lcd_sem(1);
+ 
+
+// Thread 1, led fire effect
+void thread1(void const *args)
+{
+    while(1) {
+        //ramp up brightness level
+        for(double x = 0.0; x <= 1.0; x = x+0.2) {
+            red = x*x;
+            Thread::wait(300);
+        }
+        red=0;
+        //ramp up brightness level
+        for(double x = 0.0; x <= 1.0; x = x+0.2) {
+            blue = x*x;
+            Thread::wait(300);
+        }
+        blue=0;
+    }
+}
+
+// Thread 2 update the lcd with the current rgb values
+void thread2(void const *args)
+{
+    while(true) {       // thread loop
+        //lcd_mutex.lock();
+        lcd_sem.wait();
+        lcd.color(WHITE);
+        lcd.locate(1,1);
+        lcd.printf("R: %f", (float)red);
+        lcd.locate(1,3);
+        lcd.printf("B: %f", (float)blue);
+        //lcd_mutex.unlock();
+        lcd_sem.release();
+        Thread::wait(150);
+    }
+}
+
+// Thread 3
+// print a sin function in a small window
+// the value of DACout pin  changes the speed of the sine wave
+void thread3(void const *args)
+{
+    int t = 0;
+    
+    while(1) {
+        //lcd_mutex.lock();
+        lcd_sem.wait();
+        lcd.locate(1,9);
+        lcd.color(RED);
+        lcd.printf("Time: %d seconds", t);
+        //lcd_mutex.unlock();
+        lcd_sem.release();
+        
+        t++;
+        Thread::wait(1000);
+    }
+}
+
+int main()
+{
+    //Get a file pointer for playing audio
+    FILE *wave_file;
+    //Jack up the lcds baud rate
+    lcd.baudrate(3000000);
+    green = 0;
+    
+    Thread t1(thread1); //start thread1
+    Thread t2(thread2); //start thread2
+    Thread t3(thread3); //start thread3
+
+    while(1) {
+        wave_file=fopen("/sd/mydir/siren.wav","r");
+        if(wave_file==NULL) printf("file open error!\n\n\r");
+        waver.play(wave_file);
+        fclose(wave_file);
+    }
+}