99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include "input.h"
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#include "systick.h"
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static volatile int8_t rotary_delta = 0;
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static volatile uint8_t sw_event = 0;
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void input_init()
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{
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PORT_ROTARY(DDR) &= ~(PIN_ROTARY_A | PIN_ROTARY_B); // Configure as input
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PORT_ROTARY(PORT) &= ~(PIN_ROTARY_A | PIN_ROTARY_B); // Set pullups
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PORT_KEYPAD(DDR) &= ~(PIN_KEYPAD_MASK); // Key inputs
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PORT_KEYPAD(PORT) |= PIN_KEYPAD_MASK; // Key pullups
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}
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int8_t get_rotary_delta()
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{
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int8_t temp = rotary_delta;
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//rotary_delta = 0;
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return temp;
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}
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static inline void input_proc_rotary()
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{
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static int8_t last_a;
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int8_t a;
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int8_t b;
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int8_t p;
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p = PORT_ROTARY(PIN);
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a = (p & PIN_ROTARY_A);
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b = (p & PIN_ROTARY_B);
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a = !a;
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b = !b;
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if (a == 1 && last_a == 0) {
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_delay_ms(1); // TODO
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rotary_delta += !!(a ^ b);
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}
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if (a == 0 && last_a == 1) {
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_delay_ms(1); // TODO
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rotary_delta -= !(a ^ b);
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}
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last_a = a;
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}
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// TODO: Pressing two keys at the same time can lead to unfortunate behavior.
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void input_proc_switches()
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{
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uint8_t sw;
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uint8_t ev;
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uint8_t i;
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static uint8_t sw_last = 0xFF;
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uint8_t delta;
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sw = PORT_KEYPAD(PIN) & PIN_KEYPAD_MASK;
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ev = sw ^ sw_last;
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if (ev) {
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if (timer_expired(TIMID_SW_DEBOUNCE)) { // If we read a value, wait for the debounce time before we process any other state
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for (i=0; i < 8; ++i) {
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if (ev & (1 << i)) {
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if (sw & (1 << i)) { // Key release
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if (timer_expired(TIMID_SW_LONGPRESS))
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i |= (1 << 7) | (1 << 6);
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else
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i |= (1 << 7);
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sw_event = i;
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} else { // Key push
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sw_event = 0; // To be honest, I don't have a f*cking clue why I need this...
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timer_set(TIMID_SW_LONGPRESS, MS_TO_TICKS(1000));
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}
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timer_set(TIMID_SW_DEBOUNCE, MS_TO_TICKS(250));
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break; // We can only process one event at a time anyway, so let's quit it here
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}
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}
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}
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sw_last = sw;
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}
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}
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uint8_t get_switch_event()
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{
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uint8_t temp = sw_event;
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sw_event = 0;
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return temp;
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}
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// Need to call timer_proc() before calling this function!
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void input_proc()
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{
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input_proc_rotary();
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input_proc_switches();
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}
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