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/*
* Copyright 2018 Jack Humbert <jack.humb@gmail.com>
* Copyright 2019 Drashna Jaelre (Christopher Courtney) <drashna@live.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dip_switch.h"
// for memcpy
#include <string.h>
#if !defined(DIP_SWITCH_PINS)
# error "No DIP switch pads defined by DIP_SWITCH_PINS"
#endif
#define NUMBER_OF_DIP_SWITCHES (sizeof(dip_switch_pad) / sizeof(pin_t))
static pin_t dip_switch_pad[] = DIP_SWITCH_PINS;
static bool dip_switch_state[NUMBER_OF_DIP_SWITCHES] = {0};
static bool last_dip_switch_state[NUMBER_OF_DIP_SWITCHES] = {0};
__attribute__((weak)) void dip_switch_update_user(uint8_t index, bool active) {}
__attribute__((weak)) void dip_switch_update_kb(uint8_t index, bool active) { dip_switch_update_user(index, active); }
__attribute__((weak)) void dip_switch_update_mask_user(uint32_t state) {}
__attribute__((weak)) void dip_switch_update_mask_kb(uint32_t state) { dip_switch_update_mask_user(state); }
void dip_switch_init(void) {
for (uint8_t i = 0; i < NUMBER_OF_DIP_SWITCHES; i++) {
setPinInputHigh(dip_switch_pad[i]);
}
dip_switch_read(true);
}
void dip_switch_read(bool forced) {
bool has_dip_state_changed = false;
uint32_t dip_switch_mask = 0;
for (uint8_t i = 0; i < NUMBER_OF_DIP_SWITCHES; i++) {
dip_switch_state[i] = !readPin(dip_switch_pad[i]);
dip_switch_mask |= dip_switch_state[i] << i;
if (last_dip_switch_state[i] != dip_switch_state[i] || forced) {
has_dip_state_changed = true;
dip_switch_update_kb(i, dip_switch_state[i]);
}
}
if (has_dip_state_changed) {
dip_switch_update_mask_kb(dip_switch_mask);
memcpy(last_dip_switch_state, dip_switch_state, sizeof(dip_switch_state));
}
}
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