am9513.h revision 53106ae68acf6eda9593150a25fc44e30fd5ff68 
1/*
2    module/am9513.h
3    value added preprocessor definitions for Am9513 timer chip
4
5    COMEDI - Linux Control and Measurement Device Interface
6    Copyright (C) 1998 David A. Schleef <ds@schleef.org>
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24#ifndef _AM9513_H_
25#define _AM9513_H_
26
27#if 0
28
29/*
30 *	Before including this file, the following need to be defined:
31 */
32#define Am9513_8BITBUS xxx
33/* or */
34#define Am9513_16BITBUS xxx
35
36#define Am9513_output_control(a)	xxx
37#define Am9513_input_status()		xxx
38#define Am9513_output_data(a)		xxx
39#define Am9513_input_data()		xxx
40
41#endif
42
43/*
44 *
45 */
46
47#ifdef Am9513_8BITBUS
48
49#define Am9513_write_register(reg, val)				\
50	do{							\
51		Am9513_output_control(reg);			\
52		Am9513_output_data(val>>8);			\
53		Am9513_output_data(val&0xff);			\
54	}while (0)
55
56#define Am9513_read_register(reg, val)				\
57	do{							\
58		Am9513_output_control(reg);			\
59		val=Am9513_input_data()<<8;			\
60		val|=Am9513_input_data();			\
61	}while (0)
62
63#else /* Am9513_16BITBUS */
64
65#define Am9513_write_register(reg, val)				\
66	do{							\
67		Am9513_output_control(reg);			\
68		Am9513_output_data(val);			\
69	}while (0)
70
71#define Am9513_read_register(reg, val)				\
72	do{							\
73		Am9513_output_control(reg);			\
74		val=Am9513_input_data();			\
75	}while (0)
76
77#endif
78
79#endif
80