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138 lines
3.3 KiB
C
Executable File
138 lines
3.3 KiB
C
Executable File
/*
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pins_arduino.c - pin definitions for the Arduino board
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Part of Arduino / Wiring Lite
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Copyright (c) 2005 David A. Mellis
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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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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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You should have received a copy of the GNU Lesser General
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Public License along with this library; if not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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Boston, MA 02111-1307 USA
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$Id$
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*/
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#include <avr/io.h>
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#include "wiring.h"
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// On the Arduino board, digital pins are also used
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// for the analog output (software PWM). Analog input
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// pins are a separate set.
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// ATMEL ATMEGA8 / ARDUINO
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//
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// +-\/-+
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// PC6 1| |28 PC5 (AI 0)
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// (D 0) PD0 2| |27 PC4 (AI 1)
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// (D 1) PD1 3| |26 PC3 (AI 2)
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// (D 2) PD2 4| |25 PC2 (AI 3)
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// (D 3) PD3 5| |24 PC1 (AI 4)
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// (D 4) PD4 6| |23 PC0 (AI 5)
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// VCC 7| |22 GND
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// GND 8| |21 AREF
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// PB6 9| |20 AVCC
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// PB7 10| |19 PB5 (D 13)
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// (D 5) PD5 11| |18 PB4 (D 12)
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// (D 6) PD6 12| |17 PB3 (D 11) PWM
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// (D 7) PD7 13| |16 PB2 (D 10) PWM
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// (D 8) PB0 14| |15 PB1 (D 9) PWM
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// +----+
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#define NUM_DIGITAL_PINS 14
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#define NUM_ANALOG_OUT_PINS 11
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#define NUM_ANALOG_IN_PINS 6
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#define NUM_PORTS 4
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#define PB 2
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#define PC 3
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#define PD 4
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// these arrays map port names (e.g. port B) to the
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// appropriate addresses for various functions (e.g. reading
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// and writing)
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int port_to_mode[NUM_PORTS + 1] = {
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NOT_A_PORT,
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NOT_A_PORT,
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_SFR_IO_ADDR(DDRB),
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_SFR_IO_ADDR(DDRC),
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_SFR_IO_ADDR(DDRD),
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};
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int port_to_output[NUM_PORTS + 1] = {
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NOT_A_PORT,
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NOT_A_PORT,
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_SFR_IO_ADDR(PORTB),
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_SFR_IO_ADDR(PORTC),
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_SFR_IO_ADDR(PORTD),
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};
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int port_to_input[NUM_PORTS + 1] = {
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NOT_A_PORT,
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NOT_A_PORT,
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_SFR_IO_ADDR(PINB),
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_SFR_IO_ADDR(PINC),
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_SFR_IO_ADDR(PIND),
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};
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// these arrays map the pin numbers on the arduino
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// board to the atmega8 port and pin numbers
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pin_t digital_pin_to_port_array[NUM_DIGITAL_PINS] = {
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{ PD, 0 },
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{ PD, 1 },
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{ PD, 2 },
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{ PD, 3 },
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{ PD, 4 },
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{ PD, 5 },
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{ PD, 6 },
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{ PD, 7 },
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{ PB, 0 },
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{ PB, 1 },
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{ PB, 2 },
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{ PB, 3 },
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{ PB, 4 },
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{ PB, 5 },
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};
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pin_t *digital_pin_to_port = digital_pin_to_port_array;
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// Some of the digital pins also support hardware PWM (analog output).
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pin_t analog_out_pin_to_port_array[NUM_DIGITAL_PINS] = {
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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{ PB, 1 },
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{ PB, 2 },
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{ PB, 3 },
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{ NOT_A_PIN, NOT_A_PIN },
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{ NOT_A_PIN, NOT_A_PIN },
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};
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pin_t *analog_out_pin_to_port = analog_out_pin_to_port_array;
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pin_t analog_in_pin_to_port_array[NUM_ANALOG_IN_PINS] = {
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{ PC, 0 },
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{ PC, 1 },
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{ PC, 2 },
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{ PC, 3 },
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{ PC, 4 },
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{ PC, 5 },
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};
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pin_t *analog_in_pin_to_port = analog_in_pin_to_port_array;
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