4.104.114.84.95
Last change
on this file since d4d624e2 was
d4d624e2,
checked in by Ralf Corsepius <ralf.corsepius@…>, on 10/21/04 at 13:26:58
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2004-10-20 Ralf Corsepius <ralf_corsepius@…>
- libchip/rtc/mc146818a.c, libchip/rtc/mc146818a.h,
libchip/rtc/mc146818a_ioreg.c: Use POSIX fixed size types.
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-
Property mode set to
100644
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File size:
1.1 KB
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1 | /* |
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2 | * This file contains a typical set of register access routines which may be |
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3 | * used with the MC146818A chip if accesses to the chip are as follows: |
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4 | * |
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5 | * + registers are in I/O space |
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6 | * + registers are accessed as bytes |
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7 | * + registers are only byte-aligned (no address gaps) |
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8 | * |
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9 | * COPYRIGHT (c) 1989-1997. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | * |
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16 | * $Id$ |
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17 | */ |
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18 | |
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19 | #include <rtems.h> |
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20 | #include <bsp.h> |
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21 | |
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22 | uint32_t mc146818a_get_register( |
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23 | uint32_t ulCtrlPort, |
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24 | uint8_t ucRegNum |
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25 | ) |
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26 | { |
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27 | uint8_t val; |
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28 | uint8_t tmp; |
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29 | |
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30 | outport_byte( ulCtrlPort, ucRegNum ); |
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31 | inport_byte( 0x84, tmp ); /* Hack a delay to give chip time to settle */ |
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32 | inport_byte( ulCtrlPort+1, val ); |
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33 | inport_byte( 0x84, tmp ); /* Hack a delay to give chip time to settle */ |
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34 | return val; |
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35 | } |
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36 | |
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37 | void mc146818a_set_register( |
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38 | uint32_t ulCtrlPort, |
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39 | uint8_t ucRegNum, |
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40 | uint32_t ucData |
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41 | ) |
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42 | { |
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43 | outport_byte( ulCtrlPort, ucRegNum ); |
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44 | outport_byte( ulCtrlPort+1, (uint8_t)ucData ); |
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45 | } |
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