segatools/idzio/shifter.c

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#include <stdbool.h>
#include <stdint.h>
#include "idzio/shifter.h"
static bool idz_shifter_shifting;
static uint8_t idz_shifter_gear;
void idz_shifter_reset(void)
{
idz_shifter_gear = 0;
}
void idz_shifter_update(bool shift_dn, bool shift_up)
{
if (!idz_shifter_shifting) {
if (shift_dn && idz_shifter_gear > 0) {
idz_shifter_gear--;
}
if (shift_up && idz_shifter_gear < 6) {
idz_shifter_gear++;
}
}
idz_shifter_shifting = shift_dn || shift_up;
}
uint8_t idz_shifter_current_gear(void)
{
return idz_shifter_gear;
}