46 lines
911 B
C
46 lines
911 B
C
/*
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* Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
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* Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <led-display.h>
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#include <asm/io.h>
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#ifdef CONFIG_CMD_DISPLAY
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#define CWORD_CLEAR 0x80
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#define CLEAR_DELAY (110 * 2)
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#define DISPLAY_SIZE 8
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static int pos; /* Current display position */
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/* Handle different display commands */
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void display_set(int cmd)
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{
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if (cmd & DISPLAY_CLEAR) {
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out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR);
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udelay(1000 * CLEAR_DELAY);
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}
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if (cmd & DISPLAY_HOME) {
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pos = 0;
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}
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}
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/*
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* Display a character at the current display position.
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* Characters beyond the display size are ignored.
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*/
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int display_putc(char c)
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{
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if (pos >= DISPLAY_SIZE)
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return -1;
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out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c);
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return c;
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}
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#endif
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