Subversion Repositories Code-Repo

Rev

Rev 107 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
107 Kevin 1 
/* The processor calls these handlers when an interrupt is triggered */
2 
#include "maindefs.h"
3 
#include "msg_queues.h"
4 
#include <timers.h>
5 
#include "timers.h"
111 Kevin 6 
#include "pwm.h"
107 Kevin 7 
 
8 
void timers_init() {
9 
    /*--------------------Timer Delay Formulas-------------------- */
10 
    /* InitTMR0 = 256 - ( Delay * Frequency ) / ( 4* Prescaler)    */
11 
    /* Delay = (256 - InitTMR0 * Prescaler) / (Frequency / 4)      */
12 
    /* ----------------------------------------------------------- */
111 Kevin 13 
 
14 
#ifdef _BASE_STATION
15 
    OpenTimer0(TIMER_INT_ON & T0_16BIT & T0_SOURCE_INT & T0_PS_1_32);
16 
    T0CONbits.TMR0ON = 0;   // Timer 0 initially off
17 
#endif
107 Kevin 18 
 
111 Kevin 19 
//    // Set timer 1 to overflow every two seconds
107 Kevin 20 
//    OpenTimer1(TIMER_INT_ON & T1_16BIT_RW &
21 
//                T1_SOURCE_PINOSC & T1_PS_1_1 &
22 
//                T1_OSC1EN_ON & T1_SYNC_EXT_OFF,
23 
//                TIMER_GATE_OFF & TIMER_GATE_INT_OFF);
111 Kevin 24 
 
25 
#ifdef _REMOTE
26 
    // Open timer 2 for ECCP1 (PWM)
27 
    OpenTimer2(TIMER_INT_OFF & T2_PS_1_4 & T2_POST_1_1);
107 Kevin 28 
 
111 Kevin 29 
    // Open timer 3 for PWM IR signaling
30 
    OpenTimer3(TIMER_INT_ON & T3_16BIT_RW & T3_SOURCE_FOSC_4 &
31 
            T3_OSC1EN_OFF & T3_PS_1_1 & T3_SYNC_EXT_OFF, TIMER_GATE_OFF);
32 
    T3CONbits.TMR3ON = 0;   // Timer 3 initially off
33 
#endif
107 Kevin 34 
}
35 
 
36 
// Interrupt handler for timer 0
37 
void timer0_interrupt_handler() {
111 Kevin 38 
    MQ_sendmsg_ToMainFromLow(0, MSGTYPE_TIMER0, (void *) 0);
39 
}
107 Kevin 40 
 
111 Kevin 41 
void timer0_enable() {
42 
    T0CONbits.TMR0ON = 1;
107 Kevin 43 
}
44 
 
111 Kevin 45 
void timer0_disable() {
46 
    T0CONbits.TMR0ON = 0;
47 
}
48 
 
107 Kevin 49 
// Interrupt handler for timer 1
50 
void timer1_interrupt_handler() {
51 
    // Set timer to overflow every 10ms
52 
    WriteTimer1(62259);
111 Kevin 53 
}
107 Kevin 54 
 
111 Kevin 55 
void timer3_interrupt_handler() {
56 
    if (!pwm_on) {
57 
        // Turn on PWM
58 
        pwm_start();
59 
        pwm_on = 1;
60 
        WriteTimer3(0xE500);    // Send 38kHz pulses for 600us
61 
    } else {
62 
        // Turn off PWM
63 
        pwm_stop();
64 
        pwm_on = 0;
65 
        WriteTimer3(0xE500);    // Send low for 0.6ms
66 
//        WriteTimer3(0xD000);    // Send low for 1ms
67 
//        WriteTimer3(0xA000);    // Send low for 2ms
68 
//        WriteTimer3(0x1000);    // Send low for 5ms
69 
    }
70 
}
71 
 
72 
void timer3_enable() {
73 
    // Enable timer and start PWM
74 
    T3CONbits.TMR3ON = 1;
75 
    pwm_start();
76 
    pwm_on = 1;
77 
}
78 
 
79 
void timer3_disable() {
80 
    // Disable timer and stop PWM
81 
    T3CONbits.TMR3ON = 0;
82 
    pwm_stop();
83 
    pwm_on = 0;
84 
}