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git://projects.qi-hardware.com/ben-wpan.git
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190e8f0082
- common/io.h: describe the role of PROBE_TERM in version 3 - common/io.h (VERSION_ID): renamed to VERSION_ID1 - common/io.h (VERSION_ID2): added P2_0, and described version number encoding - cntr/cntr.h (enum hw_type): added HW_TYPE_V3 - cntr/cntr.c (init_io): decode version 3, flash LED three times, and configure PROBE_TERM according to version
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/*
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* common/io.h - I/O pin assignment
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*
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* Written 2010 by Werner Almesberger
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* Copyright 2010 Werner Almesberger
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*
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* This program 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 of the License, or
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* (at your option) any later version.
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*/
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#ifndef IO_H
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#define IO_H
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/* Diagnostic LED */
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#define LEDv1 P1_3
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#define LEDv2 P2_2
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/* Probe input */
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#define PROBE_T0 P1_0
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#define PROBE_ECI P1_1
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#define PROBE_INT0 P0_7
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/*
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* Probe termination
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*
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* - v1: 100 kOhm termination (not very useful)
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* - v2: pull-up for input amplifier
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* - v3: 330 Ohm termination
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*/
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#define PROBE_TERM P1_2
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/*
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* Version ID
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*
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* In version 1, P2_1 is used to provide ground to the input side. In version
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* 2, we use a ground place for this and P2_1 is unconnected. We can therefore
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* use it to identify the hardware version.
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*
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* In version 3, P2_0 is connected to ground. In all other versions, it is
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* unconnected.
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*
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* Board VERSION_ID1
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* | VERSION_ID2
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* | |
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* v1 0 Z
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* v2 Z Z
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* v3 Z 0
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*
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*/
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#define VERSION_ID1 P2_1
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#define VERSION_ID2 P2_0
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#endif /* !IO_H */
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