kopia lustrzana https://github.com/Hamlib/Hamlib
72 wiersze
2.4 KiB
C
72 wiersze
2.4 KiB
C
/* -*-C-*-
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*******************************************************************************
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*
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* File: microtune_eval_board_defs.h
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* Description: defines for parallel port control of eval board
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*
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*******************************************************************************
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*/
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/*
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* Copyright 2001 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* GNU Radio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef _MICROTUNE_EVAL_BOARD_DEFS_H_
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#define _MICROTUNE_EVAL_BOARD_DEFS_H_
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/*
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* The Microtune 4937DI5/4702DT5 cable modem tuner eval board is controlled
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* by bit banging the PC parallel port. This file defines the relevant
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* bits.
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*
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* The parallel port has an 8 bit data port (output),
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* an 8 bit control port (output) and
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* an 8 bit status port (input).
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*
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* Not all bits of the control and status ports may be arbitrarily used.
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*/
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// parallel port data port constants (output)
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static const int UT_DP_TX_SDA = 0x01; // upstream control bus
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static const int UT_DP_TX_SCL = 0x02; // upstream control bus
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static const int UT_DP_TX_AS = 0x04; // upstream control bus
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static const int UT_DP_TX_ENABLE = 0x08; // upstream h/w enable
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// bits 4,5,6 not used
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static const int UT_DP_TUNER_SDA_OUT = 0x80; // tuner i2c bus data
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// parallel port control port constants (output)
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static const int UT_CP_TUNER_SCL = 0x08; // tuner i2c bus clock
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static const int UT_CP_MUST_BE_ZERO = 0xf0; // must be zero
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// parallel port status port constants (input)
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// bits 0,1,2 not used
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static const int UT_SP_TUNER_SCL_LOOP_BACK= 0x08; // inverted SCL loop back
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static const int UT_SP_SHOULD_BE_ZERO = 0x10; // reads as zero
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static const int UT_SP_SHOULD_BE_ONE = 0x20; // reads as one
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// bit 6 not used
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static const int UT_SP_TUNER_SDA_IN = 0x80;
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#endif /* _MICROTUNE_EVAL_BOARD_DEFS_H_ */
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