314 lines
5.5 KiB
C
314 lines
5.5 KiB
C
/* $NetBSD: iq80321_7seg.c,v 1.2 2002/04/12 20:50:27 thorpej 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 Intel IQ80321.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <evbarm/iq80321/iq80321reg.h>
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#include <evbarm/iq80321/iq80321var.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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iq80321_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 = ~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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iq80321_7seg(char a, char b)
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{
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uint8_t msb, lsb;
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msb = iq80321_7seg_xlate(a);
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lsb = iq80321_7seg_xlate(b);
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snakestate = 0;
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WRITE(IQ80321_7SEG_MSB, msb);
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WRITE(IQ80321_7SEG_LSB, lsb);
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}
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static const uint8_t snakemap[][2] = {
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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 & 0xff, ~SEG_A & 0xff },
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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, ~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_G, ~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_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_D, ~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, ~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_G, ~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, ~SEG_F },
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};
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void
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iq80321_7seg_snake(void)
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{
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int cur = snakestate;
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WRITE(IQ80321_7SEG_MSB, snakemap[cur][0]);
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WRITE(IQ80321_7SEG_LSB, snakemap[cur][1]);
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snakestate = (cur + 1) & 7;
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}
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