Diff: main.cpp

Revision:

1:1c6a9eaf55b5

Parent:

0:f6a57b843f79

Child:

2:a69c8c5f5b03

--- a/main.cpp	Mon Oct 15 21:48:28 2012 +0000
+++ b/main.cpp	Tue Oct 16 17:51:10 2012 +0000
@@ -1,4 +1,7 @@
 // example to test the mbed Lab Board lcd
+// Pot1 change the contrast
+// Pot2 change the speed of the sin wave
+
 
 #include "mbed.h"
 #include "rtos.h"
@@ -6,16 +9,21 @@
 #include "Small_7.h"
 #include "Arial_9.h"
 #include "stdio.h"
-
+#include "C12832_lcd.h"
 
 Serial pc(USBTX, USBRX);
 
-#include "C12832_lcd.h"
 
 // LCD object
 C12832_LCD LCD("LCD");
 
+AnalogIn Pot1(p19);
+AnalogIn Pot2(p20);
 
+// defines to make lib thread save
+#define _lock lcd_mutex.lock();
+#define _unlock lcd_mutex.unlock();
+Mutex lcd_mutex;
 
 // print data into first line and wait for 1s
 void thread1(void const *args)
@@ -25,7 +33,7 @@
         _lock
         LCD.locate(0,0);
         LCD.set_font((unsigned char*) Small_6);
-        printf("Thread 1 count : %d",i);
+        printf("Thread1 count: %d",i);
         LCD.copy_to_lcd();
         _unlock
         i++;
@@ -36,44 +44,81 @@
 // print data into third line and wait for 0,5s
 void thread2(void const *args)
 {
-    int i;
+    int k;
     while(true) {       // thread loop
         _lock
         LCD.locate(0,20);
         LCD.set_font((unsigned char*) Arial_9);
-        printf("Thread 2 count : %d",i);
+        printf("Thread 2 count : %d",k);
         LCD.copy_to_lcd();
         _unlock
-        i++;
+        k++;
         Thread::wait(500);
     }
 }
 
 
+void thread4(void const *args)
+{
+    int i,k,v;
+    double s,a;
+    k = 1;
+    _lock
+    LCD.rect(89,0,127,17,1);
+    _unlock
+    while(true) {       // thread loop
+        _lock
+        v = Pot1.read_u16();  // get value of pot 1
+        for (i=90; i<127; i++) {           
+            s = 8 * sin((long double)(i+k) /5);
+            a = 8 * sin((long double)(i+k-1) /5);
+            LCD.pixel(i,9 + (int)a ,0);
+            LCD.pixel(i,9 + (int)s ,1);
+        }
+        LCD.copy_to_lcd();
+        _unlock
+        k++;
+        Thread::wait(v/100);
+    }
+}
 
 
+void thread5(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
+    _lock
+    LCD.set_contrast(k);
+    _unlock
+    Thread::wait(500);  
+}
+}
+
 int main()
 {
     int j;
-    pc.printf("Test LCD \n\r");
 
-    LCD.set_orientation(1);
     LCD.claim(stdout);      // send stdout to the LCD display
- 
-    // start thread1
+    LCD.cls();
+    //start thread1
     Thread t1(thread1);
-    // start thread2
+    //start thread2
     Thread t2(thread2);
+    //start thread4
+    Thread t4(thread4);
+    Thread t5(thread5);
 
     while(true) {   // this is the third thread
         _lock
-        LCD.locate(0,10);
+        LCD.locate(0,9);
         LCD.set_font((unsigned char*) Small_7);
-        printf("Thread3 count : %d",j);
+        j = LCD.get_contrast();
+        printf("contrast : %d",j);
         LCD.copy_to_lcd();
         _unlock
-        j++;
-        Thread::wait(1500);
+        Thread::wait(500);
     }
-   
+
 }