314 lines
4.7 KiB
C
314 lines
4.7 KiB
C
/* $NetBSD: brh_7seg.c,v 1.6 2012/11/12 18:00:38 skrll Exp $ */
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/*
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Support for the 7-segment display on the ADI Engineering BRH board.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: brh_7seg.c,v 1.6 2012/11/12 18:00:38 skrll Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <evbarm/adi_brh/brhreg.h>
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#include <evbarm/adi_brh/brhvar.h>
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#define WRITE(x, v) *((volatile uint8_t *) (x)) = (v)
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static int snakestate;
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static const uint8_t digitmap[] = {
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/* +#####+
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* # #
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* # #
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* # #
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* +-----+
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* # #
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* # #
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* # #
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* +#####+
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*/
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SEG_G,
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/* +-----+
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* | #
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* | #
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* | #
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* +-----+
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* | #
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* | #
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* | #
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* +-----+
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*/
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SEG_A|SEG_D|SEG_E|SEG_F|SEG_G,
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/* +#####+
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* | #
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* | #
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* | #
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* +#####+
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* # |
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* # |
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* # |
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* +#####+
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*/
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SEG_C|SEG_F,
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/* +#####+
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* | #
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* | #
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* | #
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* +#####+
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* | #
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* | #
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* | #
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* +#####+
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*/
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SEG_E|SEG_F,
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/* +-----+
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* # #
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* # #
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* # #
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* +#####+
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* | #
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* | #
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* | #
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* +-----+
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*/
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SEG_A|SEG_D|SEG_E,
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/* +#####+
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* # |
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* # |
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* # |
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* +#####+
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* | #
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* | #
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* | #
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* +#####+
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*/
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SEG_B|SEG_E,
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/* +#####+
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* # |
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* # |
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* # |
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* +#####+
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* # #
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* # #
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* # #
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* +#####+
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*/
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SEG_B,
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/* +#####+
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* | #
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* | #
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* | #
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* +-----+
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* | #
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* | #
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* | #
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* +-----+
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*/
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SEG_D|SEG_E|SEG_F,
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/* +#####+
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* # #
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* # #
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* # #
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* +#####+
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* # #
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* # #
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* # #
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* +#####+
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*/
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0,
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/* +#####+
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* # #
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* # #
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* # #
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* +#####+
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* | #
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* | #
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* | #
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* +-----+
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*/
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SEG_D|SEG_E,
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};
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static uint8_t
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brh_7seg_xlate(char c)
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{
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uint8_t rv;
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if (c >= '0' && c <= '9')
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rv = digitmap[c - '0'];
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else if (c == '.')
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rv = (uint8_t) ~SEG_DP;
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else
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rv = 0xff;
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return (rv);
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}
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void
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brh_7seg(char a)
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{
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uint8_t ch;
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ch = brh_7seg_xlate(a);
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snakestate = 0;
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WRITE(BRH_LED_VBASE, ch);
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}
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static const uint8_t snakemap[] = {
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/* +#####+
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* | |
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* | |
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* | |
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* +-----+
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* | |
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* | |
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* | |
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* +-----+
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*/
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~SEG_A,
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/* +-----+
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* # |
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* # |
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* # |
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* +-----+
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* | |
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* | |
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* | |
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* +-----+
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*/
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~SEG_F,
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/* +-----+
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* | |
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* | |
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* | |
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* +#####+
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* | |
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* | |
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* | |
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* +-----+
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*/
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~SEG_G,
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/* +-----+
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* | |
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* | |
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* | |
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* +-----+
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* | #
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* | #
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* | #
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* +-----+
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*/
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~SEG_C,
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/* +-----+
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* | |
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* | |
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* | |
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* +-----+
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* | |
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* | |
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* | |
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* +#####+
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*/
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~SEG_D,
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/* +-----+
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* | |
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* | |
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* | |
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* +-----+
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* # |
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* # |
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* # |
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* +-----+
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*/
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~SEG_E,
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/* +-----+
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* | |
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* | |
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* | |
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* +#####+
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* | |
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* | |
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* | |
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* +-----+
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*/
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~SEG_G,
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/* +-----+
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* | #
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* | #
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* | #
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* +-----+
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* | |
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* | |
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* | |
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* +-----+
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*/
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~SEG_B,
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};
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void
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brh_7seg_snake(void)
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{
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int cur = snakestate;
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WRITE(BRH_LED_VBASE, snakemap[cur]);
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snakestate = (cur + 1) & 7;
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}
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