avnish aggarwal / Mbed 2 deprecated app-board-RTOS-Threads

ok contrast may need to be adjusted with pot good demo for RTOS capabilities

Dependencies:   C12832_lcd LCD_fonts mbed-rtos mbed

Fork of app-board-RTOS-Threads by jim hamblen

Files at this revision

API Documentation at this revision

Revision 2:a69c8c5f5b03, committed 2012-10-26

Comitter:
dreschpe
Date:
Fri Oct 26 18:18:33 2012 +0000
Parent:
1:1c6a9eaf55b5
Child:
3:3ec443c0842a
Commit message:
Test program for appboard + lcd + rtos

Changed in this revision

C12832_lcd.lib Show annotated file Show diff for this revision Revisions of this file
LCD_fonts.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- a/C12832_lcd.lib	Tue Oct 16 17:51:10 2012 +0000
+++ b/C12832_lcd.lib	Fri Oct 26 18:18:33 2012 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/dreschpe/code/C12832_lcd/#66dd8afbfd06
+http://mbed.org/users/dreschpe/code/C12832_lcd/#468cdccff7af

--- a/LCD_fonts.lib	Tue Oct 16 17:51:10 2012 +0000
+++ b/LCD_fonts.lib	Fri Oct 26 18:18:33 2012 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/dreschpe/code/LCD_fonts/#ac9b0945fdb1
+http://mbed.org/users/dreschpe/code/LCD_fonts/#d0b7d7bf1f56

--- a/main.cpp	Tue Oct 16 17:51:10 2012 +0000
+++ b/main.cpp	Fri Oct 26 18:18:33 2012 +0000
@@ -1,8 +1,7 @@
-// example to test the mbed Lab Board lcd
+// 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"
@@ -11,114 +10,110 @@
 #include "stdio.h"
 #include "C12832_lcd.h"
 
-Serial pc(USBTX, USBRX);
-
-
 // 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 to make the lcd lib thread save
 Mutex lcd_mutex;
 
-// print data into first line and wait for 1s
+// Thread 1
+// print counter into first line and wait for 1 s
 void thread1(void const *args)
 {
     int i;
     while(true) {       // thread loop
-        _lock
+        lcd_mutex.lock();
         LCD.locate(0,0);
         LCD.set_font((unsigned char*) Small_6);
         printf("Thread1 count: %d",i);
-        LCD.copy_to_lcd();
-        _unlock
+        lcd_mutex.unlock();
         i++;
         Thread::wait(1000);
     }
 }
 
-// print data into third line and wait for 0,5s
+// Thread 2
+// print counter into third line and wait for 0,5s
 void thread2(void const *args)
 {
     int k;
     while(true) {       // thread loop
-        _lock
+        lcd_mutex.lock();
         LCD.locate(0,20);
         LCD.set_font((unsigned char*) Arial_9);
         printf("Thread 2 count : %d",k);
-        LCD.copy_to_lcd();
-        _unlock
+        lcd_mutex.unlock();
         k++;
-        Thread::wait(500);
+        Thread::wait(500); // wait 0.5s
     }
 }
 
-
-void thread4(void const *args)
+// 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;
-    _lock
+    lcd_mutex.lock();
     LCD.rect(89,0,127,17,1);
-    _unlock
+    lcd_mutex.unlock();
     while(true) {       // thread loop
-        _lock
         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);
-            a = 8 * sin((long double)(i+k-1) /5);
-            LCD.pixel(i,9 + (int)a ,0);
-            LCD.pixel(i,9 + (int)s ,1);
+            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();
-        _unlock
+        LCD.copy_to_lcd();  // LCD.pixel do not update the lcd 
+        lcd_mutex.unlock();
         k++;
-        Thread::wait(v/100);
+        Thread::wait(v/100);   // value of pot1 / 100
     }
 }
 
-
-void thread5(void const *args)
+// 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
-    _lock
+    k = k >> 10;          // we need only 6 bit for contrast
+     lcd_mutex.lock();
     LCD.set_contrast(k);
-    _unlock
-    Thread::wait(500);  
+     lcd_mutex.unlock();
+    Thread::wait(500);    // wait 0.5s
 }
 }
 
+
+// print the actual contrast 
 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
 
-    LCD.claim(stdout);      // send stdout to the LCD display
-    LCD.cls();
-    //start thread1
-    Thread t1(thread1);
-    //start thread2
-    Thread t2(thread2);
-    //start thread4
-    Thread t4(thread4);
-    Thread t5(thread5);
-
-    while(true) {   // this is the third thread
-        _lock
+    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();
+        j = LCD.get_contrast();    // read the actual contrast
         printf("contrast : %d",j);
-        LCD.copy_to_lcd();
-        _unlock
-        Thread::wait(500);
+        lcd_mutex.unlock();
+        Thread::wait(500);   // wait 0.5s
     }
 
 }

--- a/mbed.bld	Tue Oct 16 17:51:10 2012 +0000
+++ b/mbed.bld	Fri Oct 26 18:18:33 2012 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/cd19af002ccc
\ No newline at end of file
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ed12d17f06
\ No newline at end of file