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Bluetooth MP3 Player with uLCD, Speaker, and SD card hardware components
Dependencies: 4DGL-uLCD-SE SDFileSystem mbed-rtos mbed
Fork of app-board-RTOS-Threads by
main.cpp
- Committer:
- dreschpe
- Date:
- 2012-10-26
- Revision:
- 2:a69c8c5f5b03
- Parent:
- 1:1c6a9eaf55b5
- Child:
- 3:3ec443c0842a
File content as of revision 2:a69c8c5f5b03:
// 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("LCD"); AnalogIn Pot1(p19); AnalogIn Pot2(p20); // 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); 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); 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 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 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 printf("contrast : %d",j); lcd_mutex.unlock(); Thread::wait(500); // wait 0.5s } }