rgb16mpm/main.c

/***************************************************************************
 *   16ch RGB 8bit PWM controller                                          *
 *                                                                         *
 *   Copyright (C) 2011 - 2012 by Olaf Rempel                              *
 *   razzor AT kopf MINUS tisch DOT de                                     *
 *                                                                         *
 *   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,               *
 *                                                                         *
 *   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.             *
 ***************************************************************************/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdio.h>

#include "rgb16mpm.h"

/*
 * using ATmega32 @8MHz:
 * Fuse H: 0xD9 (no bootloader, jtag disabled)
 * Fuse L: 0xD4 (int. 8MHz Osz, fast rising power, no BOD)
 *
 * PA0..7          -> COL1..8
 * PC0..7          -> COL9..16
 * PB0 / PD7(OC2)  -> ROW2/GREEN (OC2 not used)
 * PB1 / PD5(OC1A) -> ROW1/RED   (OC1A not used)
 * PB2 / PD4(OC1B) -> ROW4       (OC1B not used)
 * PB3(OC0) / PD6  -> ROW3/BLUE  (OC0 not used)
 * PD0             -> RXD
 * PD1             -> TXD
 * PD2             -> /RX_TX
 * PD3             -> /LED
 */

int main(void) __attribute__ ((noreturn));
int main(void)
{
    DDRD  = (1<<LED);
    PORTD = (1<<LED);

    /* timer1: FCPU/1024 */
    TCCR1B = (1<<CS12) | (1<<CS10);
    TCNT1  = 0x0000;

    eeprom_read(1);
    rgb_init();
    mpm_init();

    demomode_init(nvram_data.demomode);

    sei();

    uint16_t wait = 0;
    while (1) {
        mpm_check_transfer();

        /* no delay or timeout reached */
        if (wait == 0 || (TIFR & (1<<TOV1))) {
            TIFR = (1<<TOV1);

            /* execute periodic democode */
            wait = demomode_run();
            rgb_update(COLOR_MASK, UPDATE_BLOCKING);

            if (wait > 0) {
                /* x * 8 / (8MHz/1024) */
                TCNT1 = 0xFFFF - (wait << 3);
            }
        }
    }
}