main.cpp

00001 #include "mbed.h"
00002 #include "cmsis_os.h"
00003 #include "rtos.h"
00004  
00005 Serial pc(USBTX, USBRX);
00006  
00007 
00008 /*
00009 typedef enum  {
00010   osPriorityIdle          = -3,          ///< priority: idle (lowest)
00011   osPriorityLow           = -2,          ///< priority: low
00012   osPriorityBelowNormal   = -1,          ///< priority: below normal
00013   osPriorityNormal        =  0,          ///< priority: normal (default)
00014   osPriorityAboveNormal   = +1,          ///< priority: above normal
00015   osPriorityHigh          = +2,          ///< priority: high 
00016   osPriorityRealtime      = +3,          ///< priority: realtime (highest)
00017   osPriorityError         =  0x84        ///< system cannot determine priority or thread has illegal priority
00018 } osPriority;
00019 */
00020 
00021 
00022 DigitalOut led1(LED1);
00023 DigitalOut led2(LED2);
00024 
00025 /*
00026  * This thread just flips the led2
00027  */
00028  
00029  
00030 void led2_thread(void const *args) {
00031     while (true) {
00032         led2 = !led2;
00033         Thread::wait(1000);
00034     }
00035 }
00036 
00037 
00038 /*
00039  * This thread does non blocking read
00040  */
00041  
00042 void nbread_thread(void const *args) {
00043     while(1) {
00044         if(pc.readable()) {
00045             pc.printf("got a character: %c\r\n", pc.getc());
00046          }
00047          
00048          Thread::wait(10);
00049     }
00050 }
00051 
00052 /* 
00053  * the main thread sets upthread priorities and flips led's
00054  */
00055  
00056 int main() {
00057     
00058     osPriority pri;
00059     Thread thread(led2_thread);
00060     Thread thread1(nbread_thread);
00061     
00062     pc.printf("testing thread features \r\n");
00063     printf("led2_thread priority: %d\r\n", thread.get_priority());
00064     pri = osPriorityHigh;
00065     thread.set_priority(pri);
00066     printf("led2_thread priority: %d\r\n", thread.get_priority());
00067     while (true) {
00068         led1 = !led1;
00069         Thread::wait(500);
00070     }
00071 }