tlc_progmem_utils.h

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/*  Copyright (c) 2009 by Alex Leone <acleone ~AT~ gmail.com>

    This file is part of the Arduino TLC5940 Library.

    The Arduino TLC5940 Library 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 (at your option) any later version.

    The Arduino TLC5940 Library 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 The Arduino TLC5940 Library.  If not, see
    <http://www.gnu.org/licenses/>. */

#ifndef TLC_PROGMEM_UTILS_H
#define TLC_PROGMEM_UTILS_H

#include <avr/pgmspace.h>
#include <avr/io.h>

#include "tlc_config.h"
#include "Tlc5940.h"

void tlc_setGSfromProgmem(prog_uint8_t *gsArray);
#if VPRG_ENABLED
void tlc_setDCfromProgmem(prog_uint8_t *dcArray);
#endif

/* @{ */

void tlc_setGSfromProgmem(prog_uint8_t *gsArray)
{
    prog_uint8_t *gsArrayp = gsArray;
    uint8_t *gsDatap = tlc_GSData;
    uint8_t *gsDataEnd = tlc_GSData + NUM_TLCS * 24;
    while (gsDatap < gsDataEnd) {
        // partial loop unroll, bite me for premature optimization?
        *gsDatap++ = pgm_read_byte(gsArrayp++);
        *gsDatap++ = pgm_read_byte(gsArrayp++);
        *gsDatap++ = pgm_read_byte(gsArrayp++);
    }
}


#if VPRG_ENABLED

/* @{ */

void tlc_setDCfromProgmem(prog_uint8_t *dcArray)
{
    tlc_dcModeStart();

    prog_uint8_t *p = dcArray;
    prog_uint8_t *dcArrayEnd = dcArray + NUM_TLCS * 12;
    while (p < dcArrayEnd) {
        tlc_shift8(pgm_read_byte(p++));
    }
    XLAT_PORT |= _BV(XLAT_PIN);
    XLAT_PORT &= ~_BV(XLAT_PIN);

    tlc_dcModeStop();
}

/* @} */

#endif

/* @} */

#endif

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