GNU Radio C++ API
microtune_eval_board_defs.h
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1 /* -*-C-*-
2 *******************************************************************************
3 *
4 * File: microtune_eval_board_defs.h
5 * Description: defines for parallel port control of eval board
6 *
7 *******************************************************************************
8 */
9 
10 /*
11  * Copyright 2001 Free Software Foundation, Inc.
12  *
13  * This file is part of GNU Radio
14  *
15  * GNU Radio is free software; you can redistribute it and/or modify
16  * it under the terms of the GNU General Public License as published by
17  * the Free Software Foundation; either version 3, or (at your option)
18  * any later version.
19  *
20  * GNU Radio is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23  * GNU General Public License for more details.
24  *
25  * You should have received a copy of the GNU General Public License
26  * along with GNU Radio; see the file COPYING. If not, write to
27  * the Free Software Foundation, Inc., 51 Franklin Street,
28  * Boston, MA 02110-1301, USA.
29  */
30 
31 #ifndef _MICROTUNE_EVAL_BOARD_DEFS_H_
32 #define _MICROTUNE_EVAL_BOARD_DEFS_H_
33 
34 /*
35  * The Microtune 4937DI5 cable modem tuner eval board is controlled
36  * by bit banging the PC parallel port. This file defines the relevant
37  * bits.
38  *
39  * The parallel port has an 8 bit data port (output),
40  * an 8 bit control port (output) and
41  * an 8 bit status port (input).
42  *
43  * Not all bits of the control and status ports may be arbitrarily used.
44  */
45 
46 
47 // parallel port data port constants (output)
48 
49 static const int UT_DP_TX_SDA = 0x01; // upstream control bus
50 static const int UT_DP_TX_SCL = 0x02; // upstream control bus
51 static const int UT_DP_TX_AS = 0x04; // upstream control bus
52 static const int UT_DP_TX_ENABLE = 0x08; // upstream h/w enable
53 // bits 4,5,6 not used
54 static const int UT_DP_TUNER_SDA_OUT = 0x80; // tuner i2c bus data
55 
56 // parallel port control port constants (output)
57 
58 static const int UT_CP_TUNER_SCL = 0x08; // tuner i2c bus clock
59 static const int UT_CP_MUST_BE_ZERO = 0xf0; // must be zero
60 
61 // parallel port status port constants (input)
62 
63 // bits 0,1,2 not used
64 static const int UT_SP_TUNER_SCL_LOOP_BACK= 0x08; // inverted SCL loop back
65 static const int UT_SP_SHOULD_BE_ZERO = 0x10; // reads as zero
66 static const int UT_SP_SHOULD_BE_ONE = 0x20; // reads as one
67 // bit 6 not used
68 static const int UT_SP_TUNER_SDA_IN = 0x80;
69 
70 
71 #endif /* _MICROTUNE_EVAL_BOARD_DEFS_H_ */