Diff: demodulator.cpp

Revision:

1:6e31c704f4d6

Child:

2:124a066878cc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demodulator.cpp	Mon Feb 10 16:33:35 2014 +0000
@@ -0,0 +1,53 @@
+#include "main.h"
+
+extern Serial pc;
+DigitalOut myled2(LED2);
+volatile unsigned short timer1_count;
+
+void Demodulator_init(void)
+{
+    myled2 = 0;
+    
+    LPC_SC->PCONP |=1<<2;            //timer1 power on
+    LPC_TIM1->MR0 = 2398000;        //100 msec
+    LPC_TIM1->MCR = 3;              //interrupt and reset control
+                                    //3 = Interrupt & reset timer1 on match
+                                    //1 = Interrupt only, no reset of timer0
+    NVIC_EnableIRQ(TIMER1_IRQn);    //enable timer1 interrupt
+    LPC_TIM1->TCR = 1;              //enable Timer1
+    pc.printf("Done timer1_init\n\r");
+}
+
+extern "C"  void TIMER1_IRQHandler (void)
+{
+if((LPC_TIM1->IR & 0x01) == 0x01)   // if MR0 interrupt, proceed
+    {
+    LPC_TIM1->IR |= 1 << 0;         // Clear MR0 interrupt flag
+    timer1_count++;                  //increment timer_count
+    
+   // pc.printf("timer1_count %d \n\r", timer1_count);
+    if (timer1_count >= 20)      //Set timer_count for about 8 seconds
+            {
+            if (myled2 == 1)             //If LED off, turn it on &
+                {
+                myled2 = 0;
+                timer1_count = 0;        //reset count
+                }
+            else
+                {
+                myled2 = 1;              //If LED on, turn it off &
+                timer1_count = 0;        //reset count
+                }
+            }
+    }
+}
+
+void Demodulator_thread(void const *args)
+{
+    Demodulator_init();
+    
+    while(1)
+    {
+    // wait forever...        
+    }
+}
\ No newline at end of file