source: rtems/c/src/lib/libbsp/m68k/idp/console/leds.c @ eb5a7e07

4.104.114.84.95
Last change on this file since eb5a7e07 was eb5a7e07, checked in by Joel Sherrill <joel.sherrill@…>, on 10/06/95 at 20:48:38

fixed missing CVS IDs

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/*
2 * leds.c -- control the led's on a Motorola mc68ec0x0 board.
3 *           Written by rob@cygnus.com (Rob Savoye)
4 *
5 *  $Id$
6 */
7#include "leds.h"
8
9void zylons();
10void led_putnum();
11void clear_leds();
12
13/*
14 * led_putnum -- print a hex number on the LED. the value of num must be a char with
15 *              the ascii value. ie... number 0 is '0', a is 'a', ' ' (null) clears
16 *              the led display.
17 *              Setting the bit to 0 turns it on, 1 turns it off.
18 *              the LED's are controlled by setting the right bit mask in the base
19 *              address.
20 *              The bits are:
21 *                      [d.p | g | f | e | d | c | b | a ] is the byte.
22 *
23 *              The locations are:
24 *             
25 *                       a
26 *                     -----
27 *                  f |     | b
28 *                    |  g  |
29 *                     -----
30 *                    |     |
31 *                  e |     | c
32 *                     -----
33 *                       d                . d.p (decimal point)
34 */
35void
36led_putnum ( num )
37char num;
38{
39    static unsigned char *leds = (unsigned char *)LED_ADDR;
40    static unsigned char num_bits [18] = {
41      0xff,                                             /* clear all */
42      0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x98, /* numbers 0-9 */
43      0x98, 0x20, 0x3, 0x27, 0x21, 0x4, 0xe             /* letters a-f */
44    };
45
46    if (num >= '0' && num <= '9')
47      num = (num - '0') + 1;
48
49    if (num >= 'a' && num <= 'f')
50      num = (num - 'a') + 12;
51
52    if (num == ' ')
53      num = 0;
54
55    *leds = num_bits[(int)num];
56}
57
58/* This procedure added by Doug McBride, Colorado Space Grant College --
59   Probably should be a macro instead */
60void
61clear_leds ( )
62{
63    static unsigned char *leds = (unsigned char *)LED_ADDR;
64    *leds = 0xFF;
65}
66
67/*
68 * zylons -- draw a rotating pattern. NOTE: this function never returns.
69 */
70void
71zylons()
72{
73  unsigned char *leds   = (unsigned char *)LED_ADDR;
74  unsigned char curled = 0xfe;
75
76  while (1)
77    {
78      *leds = curled;
79      curled = (curled >> 1) | (curled << 7);
80      delay ( 8000 );
81    }
82}
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