111 lines
2.2 KiB
C
111 lines
2.2 KiB
C
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/*
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Copyright 2014 Kai Ryu <kai1103@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <util/delay.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "yc059.h"
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inline
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void yc059_ir_enable(void)
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{
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YC059_IR_DDR |= (1<<YC059_IR_BIT);
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}
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inline
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void yc059_ir_disable(void)
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{
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YC059_IR_DDR &= ~(1<<YC059_IR_BIT);
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}
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inline
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void yc059_ir_high(void)
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{
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YC059_IR_PORT &= ~(1<<YC059_IR_BIT);
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}
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inline
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void yc059_ir_low(void)
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{
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YC059_IR_PORT |= (1<<YC059_IR_BIT);
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}
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void yc059_init(void)
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{
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YC059_IR_DDR &= ~(1<<YC059_IR_BIT);
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YC059_IR_PORT &= ~(1<<YC059_IR_BIT);
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}
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void yc059_send(uint8_t data)
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{
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if (data == YC059_ERROR) return;
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cli();
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yc059_ir_enable();
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yc059_send_header();
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yc059_send_address();
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yc059_send_byte(data);
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yc059_send_byte(~data);
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yc059_send_stop();
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yc059_ir_disable();
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sei();
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}
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inline
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void yc059_send_header(void)
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{
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yc059_ir_high();
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_delay_us(YC059_HDR_MARK);
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yc059_ir_low();
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_delay_us(YC059_HDR_SPACE);
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}
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inline
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void yc059_send_stop(void)
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{
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yc059_ir_high();
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_delay_us(YC059_BIT_MARK);
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yc059_ir_low();
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}
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inline
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void yc059_send_address(void)
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{
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yc059_send_word(YC059_ADDRESS);
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}
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void yc059_send_byte(uint8_t byte)
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{
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for (uint8_t i = 0; i < 8; i++) {
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yc059_ir_high();
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_delay_us(YC059_BIT_MARK);
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yc059_ir_low();
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if (byte & 1) {
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_delay_us(YC059_ONE_SPACE);
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}
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else {
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_delay_us(YC059_ZERO_SPACE);
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}
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byte >>= 1;
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}
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}
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void yc059_send_word(uint16_t word)
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{
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yc059_send_byte((word & 0xFF00) >> 8);
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yc059_send_byte(word & 0xFF);
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}
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