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tmk_keyboard_custom/common/led_matrix.c

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2014-01-11 13:24:32 +00:00
/*
Copyright 2013,2014 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 <avr/io.h>
#include <avr/interrupt.h>
#include "led_matrix.h"
2014-01-13 13:04:24 +00:00
#define LED_MATRIX_TIMER_TOP F_CPU/(256*64)/LED_MATRIX_ROWS
void led_matrix_init(void)
{
/* Timer1 setup */
/* CTC mode */
TCCR1B |= (1<<WGM12);
/* Clock selelct: clk/1 */
TCCR1B |= (1<<CS10);
/* Set TOP value */
uint8_t sreg = SREG;
cli();
OCR1AH = (LED_MATRIX_TIMER_TOP >> 8) & 0xFF;
OCR1AL = LED_MATRIX_TIMER_TOP & 0xFF;
SREG = sreg;
}
void led_matrix_enable(void)
{
/* Enable Compare Match Interrupt */
TIMSK1 |= _BV(OCIE1A);
}
void led_matrix_disable(void)
{
/* Disable Compare Match Interrupt */
TIMSK1 &= ~_BV(OCIE1A);
}