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tmk_keyboard_custom/keyboard/RedScarfII/yc059.c

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/*
Copyright 2014 Kai Ryu <kai1103@gmail.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 <util/delay.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "yc059.h"
inline
void yc059_ir_enable(void)
{
YC059_IR_DDR |= (1<<YC059_IR_BIT);
}
inline
void yc059_ir_disable(void)
{
YC059_IR_DDR &= ~(1<<YC059_IR_BIT);
}
inline
void yc059_ir_high(void)
{
YC059_IR_PORT &= ~(1<<YC059_IR_BIT);
}
inline
void yc059_ir_low(void)
{
YC059_IR_PORT |= (1<<YC059_IR_BIT);
}
void yc059_init(void)
{
YC059_IR_DDR &= ~(1<<YC059_IR_BIT);
YC059_IR_PORT &= ~(1<<YC059_IR_BIT);
}
void yc059_send(uint8_t data)
{
if (data == YC059_ERROR) return;
cli();
yc059_ir_enable();
yc059_send_header();
yc059_send_address();
yc059_send_byte(data);
yc059_send_byte(~data);
yc059_send_stop();
yc059_ir_disable();
sei();
}
inline
void yc059_send_header(void)
{
yc059_ir_high();
_delay_us(YC059_HDR_MARK);
yc059_ir_low();
_delay_us(YC059_HDR_SPACE);
}
inline
void yc059_send_stop(void)
{
yc059_ir_high();
_delay_us(YC059_BIT_MARK);
yc059_ir_low();
}
inline
void yc059_send_address(void)
{
yc059_send_word(YC059_ADDRESS);
}
void yc059_send_byte(uint8_t byte)
{
for (uint8_t i = 0; i < 8; i++) {
yc059_ir_high();
_delay_us(YC059_BIT_MARK);
yc059_ir_low();
if (byte & 1) {
_delay_us(YC059_ONE_SPACE);
}
else {
_delay_us(YC059_ZERO_SPACE);
}
byte >>= 1;
}
}
void yc059_send_word(uint16_t word)
{
yc059_send_byte((word & 0xFF00) >> 8);
yc059_send_byte(word & 0xFF);
}