130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/***************************************************************************
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* Copyright (C) 02/2010 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License, *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/pgmspace.h>
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#define F_CPU 3686400
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#include <util/delay.h>
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#include "6x8_vertikal_LSB_1.h"
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/*
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* at90s2313 pinout:
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* PB0-4 => LED C1-5
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* PB5-7 => free/ISP
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* PD0-6 => LED R1-7 (with 100R resistors)
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*/
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/* for TC12-11 */
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//#define COL_SEL(x) PORTB = ~(x)
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//#define COL_DATA(x) PORTD = (x)
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/* for TA12-11 */
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#define COL_SEL(x) PORTB = (x)
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#define COL_DATA(x) PORTD = ~(x)
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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static const char text[] = " <<<AT90S2313:Scrolltext-Demo>>>";
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/* scrollbuffer */
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static volatile uint8_t data[5 + 1 + 5];
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static volatile uint8_t offset;
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ISR(SIG_OVERFLOW0)
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{
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static uint8_t col;
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/* ~2,8ms */
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TCNT0 = 0xFF - 40;
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COL_DATA(0x00);
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COL_SEL(1 << col);
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COL_DATA(data[offset + col]);
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col = (col == 5) ? 0 : col + 1;
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}
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int main(void)
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{
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uint8_t mode = 0;
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uint8_t pos = 0;
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uint8_t delay = 0;
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DDRB = 0x1F;
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DDRD = 0x7F;
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/* Timer0: FCPU/256 */
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TCCR0 = (1<<CS02);
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TIMSK = (1<<TOIE0);
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sei();
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while (1) {
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switch (mode)
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{
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case 0:
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if (offset == 6) {
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offset = 0;
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if (text[pos +1] == '\0') {
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pos = 0;
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mode++;
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break;
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} else {
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pos++;
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}
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}
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if (offset == 0) {
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memcpy_P((void *)&data[0], font[(uint8_t)text[pos]], 5);
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memcpy_P((void *)&data[1 + 5], font[(uint8_t)text[pos +1]], 5);
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}
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offset++;
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delay = 12;
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break;
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case 1:
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memcpy_P((void *)&data[0], &font[pos], 5);
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if (pos == (ARRAY_SIZE(font) -1)) {
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pos = 0;
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mode++;
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break;
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} else {
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pos++;
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}
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delay = 20;
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break;
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default:
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mode = 0;
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delay = 0;
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break;
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}
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while (delay--)
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_delay_ms(10);
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}
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return 0;
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}
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