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/*
* rhmidi
*
* Copyright (C) 2014 Christian Pointner <equinox@helsinki.at>
*
* This file is part of rhmidi.
*
* rhmidi 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 3 of the License, or
* any later version.
*
* rhmidi 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 rhmidi. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include "gpio.h"
#include "eventqueue.h"
#define GPIO_PIN PINE
#define GPIO_PORT PORTE
#define GPIO_DDR DDRE
#define GPIO_NUM_INPUTS 4
#define GPIO_NUM_OUTPUTS 4
uint8_t input_last_sent[GPIO_NUM_INPUTS];
void gpio_init(void)
{
GPIO_DDR = 0x0F;
GPIO_PORT = 0xF0;
uint8_t i;
for(i = 0; i < GPIO_NUM_INPUTS; ++i)
input_last_sent[i] = 0;
}
void gpio_out_on(uint8_t num)
{
if(num < GPIO_NUM_OUTPUTS)
GPIO_PORT |= (1 << num);
}
void gpio_out_off(uint8_t num)
{
if(num < GPIO_NUM_OUTPUTS)
GPIO_PORT &= ~(1 << num);
}
void gpio_out_toggle(uint8_t num)
{
if(num < GPIO_NUM_OUTPUTS)
GPIO_PORT ^= (1 << num);
}
void gpio_task(void)
{
uint8_t i;
for(i = 0; i < GPIO_NUM_INPUTS; ++i) {
uint8_t current_state = GPIO_PIN & (1<<(i+4));
if(current_state != input_last_sent[i]) {
input_last_sent[i] = current_state;
eventqueue_push(i + 64, ((current_state) ? 0 : 1)); // TODO: offset should be defined somewhere
}
}
}
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