88 lines
1.3 KiB
C
88 lines
1.3 KiB
C
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#include <pentabug/hal.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#define __DELAY_BACKWARD_COMPATIBLE__
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#include <util/delay.h>
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#include <pentabug/lifecycle.h>
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#include <pentabug/timer.h>
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static uint8_t ir_active = 1;
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static int int_skip = 0;
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static int button_count[2];
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// major interrupt for button handling, every 5ms
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inline static void major_interrupt(void) {
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uint8_t i = 0;
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for(i = 0; i < 2; ++i) {
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if(PINB & (1 << i)) {
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button_count[i] = 0;
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} else {
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++button_count[i];
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}
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if(button_count[i] == 400) {
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next_app(i ? 1 : -1);
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PORTC ^= 1 << 2;
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}
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}
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}
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ISR(TIMER0_COMPA_vect) {
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if(ir_active) {
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PORTD ^= 1 << 2;
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}
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++int_skip;
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if(int_skip >= 38 * 5) {
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int_skip = 0;
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major_interrupt();
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}
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}
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void init_hw(void) {
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// we need to get real fast (8MHz) to handle 38kHz IR frequency ...
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CLKPR = 0b10000000;
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CLKPR = 0b00000000;
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// initialize timer
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TIMSK0 |= (1 << OCIE0A);
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// calculated and works, but frequency is a little bit off?
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OCR0A = 105;
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TCCR0A = (1 << WGM01);
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TCCR0B = (1 << CS00);
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sei();
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}
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void reset_hw(void) {
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stop_timer();
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// 0: S1
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// 1: S2
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// 7: BUZZR
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PORTB = (1 << 0) | (1 << 1) | (1 << 7);
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DDRB = (1 << 7);
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// 0: BUZGND
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// 2: LED2
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// 3: LED2 (+)
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PORTC = (1 << 2) | (1 << 3);
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DDRC = (1 << 0) | (1 << 2) | (1 << 3);
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// 2: IR
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// 4: LED
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PORTD = (1 << 4);
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DDRD = (1 << 2) | (1 << 4);
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}
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