APP Team / Mbed 2 deprecated app3

led example with 2 timers

Dependencies:   mbed mbed-rtos

demodulator.cpp@1:6e31c704f4d6, 2014-02-10 (annotated)

Committer:
passelin
Date:
Mon Feb 10 16:33:35 2014 +0000
Revision:
1:6e31c704f4d6
Child:
2:124a066878cc
in progress..

Who changed what in which revision?

UserRevisionLine numberNew contents of line
passelin 1:6e31c704f4d6 1 #include "main.h"
passelin 1:6e31c704f4d6 2
passelin 1:6e31c704f4d6 3 extern Serial pc;
passelin 1:6e31c704f4d6 4 DigitalOut myled2(LED2);
passelin 1:6e31c704f4d6 5 volatile unsigned short timer1_count;
passelin 1:6e31c704f4d6 6
passelin 1:6e31c704f4d6 7 void Demodulator_init(void)
passelin 1:6e31c704f4d6 8 {
passelin 1:6e31c704f4d6 9 myled2 = 0;
passelin 1:6e31c704f4d6 10
passelin 1:6e31c704f4d6 11 LPC_SC->PCONP |=1<<2; //timer1 power on
passelin 1:6e31c704f4d6 12 LPC_TIM1->MR0 = 2398000; //100 msec
passelin 1:6e31c704f4d6 13 LPC_TIM1->MCR = 3; //interrupt and reset control
passelin 1:6e31c704f4d6 14 //3 = Interrupt & reset timer1 on match
passelin 1:6e31c704f4d6 15 //1 = Interrupt only, no reset of timer0
passelin 1:6e31c704f4d6 16 NVIC_EnableIRQ(TIMER1_IRQn); //enable timer1 interrupt
passelin 1:6e31c704f4d6 17 LPC_TIM1->TCR = 1; //enable Timer1
passelin 1:6e31c704f4d6 18 pc.printf("Done timer1_init\n\r");
passelin 1:6e31c704f4d6 19 }
passelin 1:6e31c704f4d6 20
passelin 1:6e31c704f4d6 21 extern "C" void TIMER1_IRQHandler (void)
passelin 1:6e31c704f4d6 22 {
passelin 1:6e31c704f4d6 23 if((LPC_TIM1->IR & 0x01) == 0x01) // if MR0 interrupt, proceed
passelin 1:6e31c704f4d6 24 {
passelin 1:6e31c704f4d6 25 LPC_TIM1->IR |= 1 << 0; // Clear MR0 interrupt flag
passelin 1:6e31c704f4d6 26 timer1_count++; //increment timer_count
passelin 1:6e31c704f4d6 27
passelin 1:6e31c704f4d6 28 // pc.printf("timer1_count %d \n\r", timer1_count);
passelin 1:6e31c704f4d6 29 if (timer1_count >= 20) //Set timer_count for about 8 seconds
passelin 1:6e31c704f4d6 30 {
passelin 1:6e31c704f4d6 31 if (myled2 == 1) //If LED off, turn it on &
passelin 1:6e31c704f4d6 32 {
passelin 1:6e31c704f4d6 33 myled2 = 0;
passelin 1:6e31c704f4d6 34 timer1_count = 0; //reset count
passelin 1:6e31c704f4d6 35 }
passelin 1:6e31c704f4d6 36 else
passelin 1:6e31c704f4d6 37 {
passelin 1:6e31c704f4d6 38 myled2 = 1; //If LED on, turn it off &
passelin 1:6e31c704f4d6 39 timer1_count = 0; //reset count
passelin 1:6e31c704f4d6 40 }
passelin 1:6e31c704f4d6 41 }
passelin 1:6e31c704f4d6 42 }
passelin 1:6e31c704f4d6 43 }
passelin 1:6e31c704f4d6 44
passelin 1:6e31c704f4d6 45 void Demodulator_thread(void const *args)
passelin 1:6e31c704f4d6 46 {
passelin 1:6e31c704f4d6 47 Demodulator_init();
passelin 1:6e31c704f4d6 48
passelin 1:6e31c704f4d6 49 while(1)
passelin 1:6e31c704f4d6 50 {
passelin 1:6e31c704f4d6 51 // wait forever...
passelin 1:6e31c704f4d6 52 }
passelin 1:6e31c704f4d6 53 }