60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
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// Copyright (C) 2009 Ubixum, Inc.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/** \file serial.h
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* defines functions to print to a serial console with SIO0
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**/
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#include "fx2types.h"
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/**
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* This function inits sio0 to use T2CON (timer 2)
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* See TRM 14.3.4.1 (Table 14-16)
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* Certain baud rates have too high an error rate to work. All baud rates are .16%
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* except:
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*
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* 12MHZ 24MHZ
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* \li 57600 -6.99%
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* \li 38400 -2.34% -2.34%
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* \li 19200 -2.34%
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*
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* Possible Baud rates:
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* \li 2400
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* \li 4800
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* \li 9600
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* \li 19200
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* \li 28800
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* \li 38400
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* \li 57600
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*
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* Any of these rates should work except 57600 at 12mhz. -2.34% is pushing
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* most hardware specs for working. All rates at 48mhz work at .16%
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**/
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void
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sio0_init(WORD baud_rate)
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__critical; // baud_rate max should be 57600 since int=2 bytes
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/**
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putchar('\\n') or putchar('\\r') both transmit \\r\\n
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Just use one or the other. (This makes terminal echo easy)
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**/
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void
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putchar(char c);
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char
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getchar();
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