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/*
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Copyright 2013 , 2014 Kai Ryu < kai1103 @ gmail . com >
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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 <avr/pgmspace.h>
# include "backlight.h"
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# if defined(GH60_REV_CHN)
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static const uint8_t backlight_table [ ] PROGMEM = {
0 , 16 , 128 , 255
} ;
/* Backlight pin configuration
* PWM : PB7
*/
void backlight_set ( uint8_t level )
{
if ( level > 0 ) {
// Turn on PWM
cli ( ) ;
DDRB | = ( 1 < < PB6 ) ;
TCCR1A | = ( ( 1 < < WGM10 ) | ( 1 < < COM1B1 ) ) ;
TCCR1B | = ( ( 1 < < CS11 ) | ( 1 < < CS10 ) ) ;
sei ( ) ;
// Set PWM
OCR1B = pgm_read_byte ( & backlight_table [ level ] ) ;
}
else {
// Turn off PWM
cli ( ) ;
DDRB & = ~ ( 1 < < PB6 ) ;
TCCR1A & = ~ ( ( 1 < < WGM10 ) | ( 1 < < COM1B1 ) ) ;
TCCR1B & = ~ ( ( 1 < < CS11 ) | ( 1 < < CS10 ) ) ;
sei ( ) ;
// Set PWM
OCR1B = 0 ;
}
}
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# elif #defined(GH60_REV_CNY)
static const uint8_t backlight_table [ ] PROGMEM = {
0 , 16 , 128 , 255
} ;
void backlight_set ( uint8_t level )
{
if ( level > 0 ) {
led_matrix_disable ( ) ;
for ( uint8_t row = 0 ; row < LED_MATRIX_ROWS ; row + + ) {
for ( uint8_t col = 0 ; col < LED_MATRIX_COLS ; col + + ) {
led_matrix_set_value ( row , col , pgm_read_byte ( & backlight_table [ level ] ) ) ;
}
}
led_matrix_enable ( ) ;
}
else {
led_matrix_disable ( ) ;
}
}
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# else
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void backlight_set ( uint8_t level )
{
if ( level > 0 ) {
DDRF | = ( 1 < < PF7 | 1 < < PF6 | 1 < < PF5 | 1 < < PF4 ) ;
PORTF & = ~ ( 1 < < PF7 | 1 < < PF6 | 1 < < PF5 | 1 < < PF4 ) ;
}
else {
DDRF & = ~ ( 1 < < PF7 | 1 < < PF6 | 1 < < PF5 | 1 < < PF4 ) ;
}
}
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# endif