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/*
* spreadspace avr utils
*
*
* Copyright (C) 2013-2014 Christian Pointner <equinox@spreadspace.org>
* Othmar Gsenger <otti@wirdorange.org>
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils 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 3 of the License, or
* any later version.
*
* spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/sfr_defs.h>
#include <avr/interrupt.h>
#include "ledmatrix.h"
#define LEDMATRIX_PORT PORTB
#define LEDMATRIX_DDR DDRB
#define LEDMATRIX_RED 6
#define LEDMATRIX_GREEN 7
#define LEDMATRIX_NUM_LEDS 6
#define LEDMATRIX_MASK 0x3F
#define BLINK_DELAY 3
ledmatrix_mode_t mode = off;
uint8_t moving_cnt = 0;
uint8_t wait_cnt = 0;
void ledmatrix_start_timer(void)
{
TCCR3A = 0; // prescaler 1:1024, WGM = 4 (CTC)
TCCR3B = 1<<WGM32 | 1<<CS32 | 1<<CS30; //
OCR3A = 1561; // (1+1561)*1024 = 1599488 -> ~100 ms @ 16 MHz
TCNT3 = 0;
TIMSK3 = 1<<OCIE3A;
}
void ledmatrix_stop_timer(void)
{
TCCR3B = 0;
TIMSK3 = 0;
}
void ledmatrix_off_init(void)
{
LEDMATRIX_PORT = LEDMATRIX_MASK;
LEDMATRIX_PORT |= 1<<LEDMATRIX_RED | 1<<LEDMATRIX_GREEN;
}
void ledmatrix_red_init(void)
{
LEDMATRIX_PORT = LEDMATRIX_MASK | 1<<LEDMATRIX_GREEN;
LEDMATRIX_PORT &= ~(1<<LEDMATRIX_RED);
}
void ledmatrix_red_moving_init(void)
{
moving_cnt = 0;
LEDMATRIX_PORT = (1<<LEDMATRIX_GREEN) | (LEDMATRIX_MASK & (1<<moving_cnt));
ledmatrix_start_timer();
}
void ledmatrix_red_moving_handle(void)
{
moving_cnt++;
if(moving_cnt >= LEDMATRIX_NUM_LEDS)
moving_cnt = 0;
LEDMATRIX_PORT = (1<<LEDMATRIX_GREEN) | (LEDMATRIX_MASK & (1<<moving_cnt));
}
void ledmatrix_red_blink_init(void)
{
wait_cnt = 0;
ledmatrix_red_init();
ledmatrix_start_timer();
}
void ledmatrix_red_blink_handle(void)
{
if(++wait_cnt >= BLINK_DELAY) {
LEDMATRIX_PORT ^= 1<<LEDMATRIX_RED;
wait_cnt = 0;
}
}
void ledmatrix_green_init(void)
{
LEDMATRIX_PORT = LEDMATRIX_MASK | 1<<LEDMATRIX_RED;
LEDMATRIX_PORT &= ~(1<<LEDMATRIX_GREEN);
}
void ledmatrix_green_moving_init(void)
{
moving_cnt = 0;
LEDMATRIX_PORT = (1<<LEDMATRIX_RED) | (LEDMATRIX_MASK & (1<<(LEDMATRIX_NUM_LEDS - moving_cnt - 1)));
ledmatrix_start_timer();
}
void ledmatrix_green_moving_handle(void)
{
moving_cnt++;
if(moving_cnt >= LEDMATRIX_NUM_LEDS)
moving_cnt = 0;
LEDMATRIX_PORT = (1<<LEDMATRIX_RED) | (LEDMATRIX_MASK & (1<<(LEDMATRIX_NUM_LEDS - moving_cnt - 1)));
}
void ledmatrix_green_blink_init(void)
{
wait_cnt = 0;
ledmatrix_green_init();
ledmatrix_start_timer();
}
void ledmatrix_green_blink_handle(void)
{
if(++wait_cnt >= BLINK_DELAY) {
LEDMATRIX_PORT ^= 1<<LEDMATRIX_GREEN;
wait_cnt = 0;
}
}
void ledmatrix_rg_moving_init(void)
{
moving_cnt = 0;
LEDMATRIX_PORT = (1<<LEDMATRIX_GREEN) | (LEDMATRIX_MASK & (1<<moving_cnt));
ledmatrix_start_timer();
}
void ledmatrix_rg_moving_handle(void)
{
moving_cnt++;
if(moving_cnt >= 2*LEDMATRIX_NUM_LEDS)
moving_cnt = 0;
if(moving_cnt >= LEDMATRIX_NUM_LEDS) {
uint8_t offset = moving_cnt - LEDMATRIX_NUM_LEDS;
LEDMATRIX_PORT = (1<<LEDMATRIX_RED) | (LEDMATRIX_MASK & (1<<(LEDMATRIX_NUM_LEDS - offset - 1)));
} else {
LEDMATRIX_PORT = (1<<LEDMATRIX_GREEN) | (LEDMATRIX_MASK & (1<<moving_cnt));
}
}
void ledmatrix_rg_blink_init(void)
{
wait_cnt = 0;
ledmatrix_red_init();
ledmatrix_start_timer();
}
void ledmatrix_rg_blink_handle(void)
{
if(++wait_cnt >= BLINK_DELAY) {
LEDMATRIX_PORT ^= ~(LEDMATRIX_MASK);
wait_cnt = 0;
}
}
void ledmatrix_init(void)
{
LEDMATRIX_DDR = 0xFF;
LEDMATRIX_PORT = 0xFF;
}
void ledmatrix_set(ledmatrix_mode_t m)
{
if(m == mode)
return;
mode = m;
ledmatrix_stop_timer();
switch(mode)
{
case off: ledmatrix_off_init(); break;
case red: ledmatrix_red_init(); break;
case red_moving: ledmatrix_red_moving_init(); break;
case red_blink: ledmatrix_red_blink_init(); break;
case green: ledmatrix_green_init(); break;
case green_moving: ledmatrix_green_moving_init(); break;
case green_blink: ledmatrix_green_blink_init(); break;
case rg_moving: ledmatrix_rg_moving_init(); break;
case rg_blink: ledmatrix_rg_blink_init(); break;
}
}
ISR(TIMER3_COMPA_vect)
{
switch(mode)
{
case red_moving: ledmatrix_red_moving_handle(); break;
case red_blink: ledmatrix_red_blink_handle(); break;
case green_moving: ledmatrix_green_moving_handle(); break;
case green_blink: ledmatrix_green_blink_handle(); break;
case rg_moving: ledmatrix_rg_moving_handle(); break;
case rg_blink: ledmatrix_rg_blink_handle(); break;
default: break;
}
}
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