4.104.114.84.95
Last change
on this file since 670d037 was
cce9322,
checked in by Joel Sherrill <joel.sherrill@…>, on 07/15/98 at 23:54:08
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Added default mc68681 register access routines.
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-
Property mode set to
100644
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File size:
1.3 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 mc68681 chip if accesses to the chip are as follows: |
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4 | * |
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5 | * + registers are accessed as bytes |
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6 | * + registers are only byte-aligned (no address gaps) |
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7 | * |
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8 | * COPYRIGHT (c) 1989-1997. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * Copyright assigned to U.S. Government, 1994. |
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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.OARcorp.com/rtems/license.html. |
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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 | |
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21 | #ifndef _MC68681_MULTIPLIER |
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22 | #define _MC68681_MULTIPLIER 1 |
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23 | #define _MC68681_NAME(_X) _X |
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24 | #define _MC68681_TYPE unsigned8 |
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25 | #endif |
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26 | |
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27 | #define CALCULATE_REGISTER_ADDRESS( _base, _reg ) \ |
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28 | (_MC68681_TYPE *)((_base) + ((_reg) * _MC68681_MULTIPLIER )) |
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29 | |
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30 | /* |
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31 | * MC68681 Get Register Routine |
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32 | */ |
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33 | |
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34 | unsigned8 _MC68681_NAME(mc68681_get_register)( |
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35 | unsigned32 ulCtrlPort, |
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36 | unsigned8 ucRegNum |
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37 | ) |
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38 | { |
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39 | _Z85C30_TYPE *port; |
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40 | |
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41 | port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum ); |
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42 | |
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43 | return *port; |
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44 | } |
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45 | |
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46 | /* |
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47 | * MC68681 Set Register Routine |
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48 | */ |
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49 | |
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50 | void _MC68681_NAME(mc68681_set_register)( |
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51 | unsigned32 ulCtrlPort, |
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52 | unsigned8 ucRegNum, |
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53 | unsigned8 ucData |
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54 | ) |
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55 | { |
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56 | _Z85C30_TYPE *port; |
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57 | |
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58 | port = CALCULATE_REGISTER_ADDRESS( ulCtrlPort, ucRegNum ); |
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59 | |
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60 | *port = ucData; |
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61 | } |
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