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68 lines
2.7 KiB
C
Executable File
68 lines
2.7 KiB
C
Executable File
/*! \file uartswconf.h \brief Interrupt-driven Software UART Driver Configuration. */
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//*****************************************************************************
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//
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// File Name : 'uartswconf.h'
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// Title : Interrupt-driven Software UART Driver Configuration
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// Author : Pascal Stang - Copyright (C) 2002-2004
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// Created : 7/20/2002
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// Revised : 4/27/2004
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// Version : 0.1
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// Target MCU : Atmel AVR Series (intended for the ATmega16 and ATmega32)
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// Editor Tabs : 4
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//
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// Description :
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// This uart library emulates the operation of a UART (serial port) using
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// the AVR's hardware timers, I/O pins, and some software.
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//
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// Specifically, this code uses:
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// -Timer 1 Output Compare A for transmit timing
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// -Timer 1 Output Compare B for receive timing
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// -Timer 1 Input Capture for receive triggering
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//
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// The above resources cannot be used for other purposes while this software
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// UART is enabled. The overflow interrupt from Timer1 can still be used for
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// other timing, but the prescaler for Timer1 must not be changed.
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//
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// Serial output from this UART can be routed to any I/O pin. Serial input
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// for this UART must come from the Timer1 Input Capture (IC1) I/O pin.
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// These options should be configured by editing your local copy of
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// "uartswconf.h".
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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#ifndef UARTSWCONF_H
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#define UARTSWCONF_H
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// constants/macros/typdefs
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#define UARTSW_RX_BUFFER_SIZE 0x20 ///< UART receive buffer size in bytes
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#define UARTSW_INVERT ///< define to invert polarity of RX/TX signals
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// when non-inverted, the serial line is appropriate for passing though
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// an RS232 driver like the MAX232. When inverted, the serial line can
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// directly drive/receive RS232 signals to/from a DB9 connector. Be sure
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// to use a current-limiting resistor and perhaps a diode-clamp circuit when
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// connecting incoming RS232 signals to a microprocessor I/O pin.
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// if non-inverted, the serial line idles high (logic 1) between bytes
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// if inverted, the serial line idles low (logic 0) between bytes
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// UART transmit pin defines
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#define UARTSW_TX_PORT PORTD ///< UART Transmit Port
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#define UARTSW_TX_DDR DDRD ///< UART Transmit DDR
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#define UARTSW_TX_PIN PD5 ///< UART Transmit Pin
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// UART receive pin defines
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// This pin must correspond to the
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// Timer1 Input Capture (ICP or IC1) pin for your processor
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#define UARTSW_RX_PORT PORTD ///< UART Receive Port
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#define UARTSW_RX_DDR DDRD ///< UART Receive DDR
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#define UARTSW_RX_PORTIN PIND ///< UART Receive Port Input
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#define UARTSW_RX_PIN PD6 ///< UART Receive Pin
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#endif
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