Cameron Causer
RTOS example running four threads
Dependencies: 4DGL-uLCD-SE SDFileSystem mbed-rtos mbed wave_player
Revision 0:9fc1245cb50f, committed 2018-10-16
- Comitter:
- kzar
- Date:
- Tue Oct 16 20:19:23 2018 +0000
- Commit message:
- RTOS example running four threads;
Changed in this revision
diff -r 000000000000 -r 9fc1245cb50f 4DGL-uLCD-SE.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/4DGL-uLCD-SE.lib Tue Oct 16 20:19:23 2018 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/4180_1/code/4DGL-uLCD-SE/#2cb1845d7681
diff -r 000000000000 -r 9fc1245cb50f SDFileSystem.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Tue Oct 16 20:19:23 2018 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/kzar/code/SDFileSystem/#02afa4960b3d
diff -r 000000000000 -r 9fc1245cb50f main.cpp
--- /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);
+ }
+}
diff -r 000000000000 -r 9fc1245cb50f mbed-rtos.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Tue Oct 16 20:19:23 2018 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/mbed_official/code/mbed-rtos/#5713cbbdb706
diff -r 000000000000 -r 9fc1245cb50f mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Oct 16 20:19:23 2018 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/e95d10626187 \ No newline at end of file
diff -r 000000000000 -r 9fc1245cb50f wave_player.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wave_player.lib Tue Oct 16 20:19:23 2018 +0000 @@ -0,0 +1,1 @@ +http://os.mbed.com/users/sravet/code/wave_player/#acc3e18e77ad