Diff: THREADS.cpp

Revision:

4:3202052e5a8b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/THREADS.cpp	Sat Aug 01 15:47:24 2020 +0000
@@ -0,0 +1,143 @@
+// example to test the mbed Lab Board lcd lib with the mbed rtos
+// Pot1 change the contrast
+// Pot2 change the speed of the sin wave
+
+#include "mbed.h"
+#include "rtos.h"
+#include "Small_6.h"
+#include "Small_7.h"
+#include "Arial_9.h"
+#include "stdio.h"
+#include "C12832_lcd.h"
+
+// LCD object
+C12832_LCD LCD;
+
+AnalogIn Pot1(p19);
+AnalogIn Pot2(p20);
+BusIn joy(p15,p12,p13,p16);
+DigitalIn fire(p14);
+
+BusOut leds(LED1,LED2,LED3,LED4);
+
+
+// mutex to make the lcd lib thread save
+Mutex lcd_mutex;
+
+// Thread 1
+// print counter into first line and wait for 1 s
+void thread1(void const *args)
+{
+    int i;
+    while(true) {       // thread loop
+        lcd_mutex.lock();
+        LCD.locate(0,0);
+        LCD.set_font((unsigned char*) Small_6);
+        LCD.printf("Thread1 count: %d",i);
+        lcd_mutex.unlock();
+        i++;
+        Thread::wait(1000);
+    }
+}
+
+// Thread 2
+// print counter into third line and wait for 0,5s
+void thread2(void const *args)
+{
+    int k;
+    while(true) {       // thread loop
+        lcd_mutex.lock();
+        LCD.locate(0,20);
+        LCD.set_font((unsigned char*) Arial_9);
+        LCD.printf("Thread 2 count : %d",k);
+        lcd_mutex.unlock();
+        k++;
+        Thread::wait(500); // wait 0.5s
+    }
+}
+
+// Thread 3
+// print a sin function in a small window
+// the value of pot 1 change the speed of the sinwave
+void thread3(void const *args)
+{
+    int i,k,v;
+    double s,a;
+    k = 1;
+    lcd_mutex.lock();
+    LCD.rect(89,0,127,17,1);
+    lcd_mutex.unlock();
+    while(true) {       // thread loop
+        v = Pot1.read_u16();  // get value of pot 1
+        lcd_mutex.lock();
+        for (i=90; i<127; i++) {
+            s = 8 * sin((long double)(i+k) /5);   // pixel to print
+            a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
+            LCD.pixel(i,9 + (int)a,0);            // erase pixel
+            LCD.pixel(i,9 + (int)s,1);            // print pixel
+        }
+        LCD.copy_to_lcd();  // LCD.pixel do not update the lcd
+        lcd_mutex.unlock();
+        k++;
+        Thread::wait(v/100);   // value of pot1 / 100
+    }
+}
+
+// Thread 4
+// input pot 2 and change the contrast of lcd
+void thread4(void const *args)
+{
+    int k;
+    while(true) {         // thread loop
+        k = Pot2.read_u16();  // get the value of poti 2
+        k = k >> 10;          // we need only 6 bit for contrast
+        lcd_mutex.lock();
+        LCD.set_contrast(k);
+        lcd_mutex.unlock();
+        Thread::wait(500);    // wait 0.5s
+    }
+}
+
+
+// print the actual contrast
+
+//Thraed 5
+// using joystick to control Leds
+void thread5(void const *args)
+{
+    while(1) {
+        if (fire) {
+            leds=0xf;
+        } else {
+            leds=joy;
+        }
+        wait(0.1);
+    }
+}
+
+
+
+
+int main()
+{
+    int j;
+    LCD.cls();
+
+    Thread t1(thread1); //start thread1
+    Thread t2(thread2); //start thread2
+    Thread t3(thread3); //start thread3
+    Thread t4(thread4); //start thread4
+    Thread t5(thread5); //start thread5
+
+
+    while(true) {       // main is the next thread
+        lcd_mutex.lock();
+        LCD.locate(0,9);
+        LCD.set_font((unsigned char*) Small_7);
+        j = LCD.get_contrast();    // read the actual contrast
+        LCD.printf("contrast : %d",j);
+        lcd_mutex.unlock();
+        Thread::wait(500);   // wait 0.5s
+    }
+
+}