/* sd2iec - SD/MMC to Commodore serial bus interface/controller
   Copyright (C) 2007-2009  Ingo Korb <ingo@akana.de>

   Inspiration and low-level SD/MMC access based on code from MMC2IEC
     by Lars Pontoppidan et al., see sdcard.c|h and config.h.

   FAT filesystem access based on code from ChaN and Jim Brain, see ff.c|h.

   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; version 2 of the License only.

   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, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


   led.c: LED handling

*/

#include <avr/io.h>
#include "config.h"
#include "led.h"

static uint8_t led_bright[16]={255,253,252,251,249,247,244,239,232,223,210,191,165,127,74,0};
static uint8_t curr_bright = 15;
static uint8_t led_bounce_dir = 1;

volatile uint8_t led_state;

void toggle_busy_led(void) {
	PORTB &= ~_BV(PB3);
	DDRB ^= _BV(PB3);
}

void set_busy_led(uint8_t state) {
	PORTB &= ~_BV(PB3);
	if(state) {
		DDRB |= _BV(PB3);
	} else {
		DDRB &= ~_BV(PB3);
	}
}

void set_pwr_led(uint8_t state) {
	PORTB &= ~_BV(PB0);
	if(state) {
		DDRB |= _BV(PB0);
	} else {
		DDRB &= ~_BV(PB0);
	}
}

void set_busy_pwm(uint8_t brightness) {
	OCR0A = led_bright[brightness];
	set_busy_led(1);
}

void bounce_busy_led() {
	set_busy_pwm(curr_bright);
	if(led_bounce_dir) {
		curr_bright--;
		if(curr_bright==0) {
			led_bounce_dir = 0;
		}
	} else {
		curr_bright++;
		if(curr_bright==15) {
			led_bounce_dir = 1;
		}
	}
}

void led_pwm() {
        set_busy_led(1);
        TCCR0A = 0x83;
        TCCR0B = 0x01;
}

void led_std() {
	set_busy_led(0);
	TCCR0A = 0;
	TCCR0B = 0;
}