1  /*
  2    pins_arduino.c - pin definitions for the Arduino board
  3    Part of Arduino / Wiring Lite
  4  
  5    Copyright (c) 2005 David A. Mellis
  6  
  7    This library is free software; you can redistribute it and/or
  8    modify it under the terms of the GNU Lesser General Public
  9    License as published by the Free Software Foundation; either
 10    version 2.1 of the License, or (at your option) any later version.
 11  
 12    This library is distributed in the hope that it will be useful,
 13    but WITHOUT ANY WARRANTY; without even the implied warranty of
 14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15    Lesser General Public License for more details.
 16  
 17    You should have received a copy of the GNU Lesser General
 18    Public License along with this library; if not, write to the
 19    Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 20    Boston, MA  02111-1307  USA
 21  
 22    $Id: pins_arduino.c 565 2009-03-25 10:50:00Z dmellis $
 23  
 24    Modified 28-08-2009 for attiny84 R.Wiersma
 25    Modified 09-10-2009 for attiny45 A.Saporetti
 26  */
 27  
 28  #ifndef Pins_Arduino_h
 29  #define Pins_Arduino_h
 30  
 31  #include <avr/pgmspace.h>
 32  
 33  // Defines to make D4 support PWM
 34  // See for more info: http://forums.adafruit.com/viewtopic.php?f=52&t=43951
 35  #define TCCR1A GTCCR
 36  #define WGM10  PWM1B
 37  
 38  // ATMEL ATTINY45 / ARDUINO
 39  //
 40  //                  +-\/-+
 41  // Ain0 (D 5) PB5  1|    |8  Vcc
 42  // Ain3 (D 3) PB3  2|    |7  PB2 (D 2)  Ain1
 43  // Ain2 (D 4) PB4  3|    |6  PB1 (D 1) pwm1
 44  //            GND  4|    |5  PB0 (D 0) pwm0
 45  //                  +----+
 46  
 47  #define NUM_DIGITAL_PINS            3
 48  #define NUM_ANALOG_INPUTS           1
 49  #define LED_BUILTIN 1
 50  #define SPI_INTERFACES_COUNT 0
 51  
 52  #define PIN_A0               (6)
 53  #define PIN_A1               (7)
 54  #define PIN_A2               (8)
 55  #define PIN_A3               (9)
 56  
 57  static const uint8_t A0 = PIN_A0;
 58  static const uint8_t A1 = PIN_A1;
 59  static const uint8_t A2 = PIN_A2;
 60  static const uint8_t A3 = PIN_A3;
 61  
 62  #define digitalPinToPCICR(p)    ( ((p) >= 0 && (p) <= 4) ? (&GIMSK) : ((uint8_t *)0) )
 63  #define digitalPinToPCICRbit(p) ( PCIE )
 64  #define digitalPinToPCMSK(p)    ( ((p) <= 4) ? (&PCMSK) : ((uint8_t *)0) )
 65  #define digitalPinToPCMSKbit(p) ( (p) )
 66  
 67  #define digitalPinToInterrupt(p)  ((p) == 2 ? 0 : NOT_AN_INTERRUPT)
 68  
 69  #define analogPinToChannel(p)   ( (p) < 6 ? (p) : (p) - 6 )
 70  
 71  #define TCCR1A GTCCR
 72  
 73  #ifdef ARDUINO_MAIN
 74  
 75  void initVariant()
 76  {
 77  	GTCCR |= (1 << PWM1B);
 78  }
 79  
 80  // these arrays map port names (e.g. port B) to the
 81  // appropriate addresses for various functions (e.g. reading
 82  // and writing) tiny45 only port B 
 83  const uint16_t PROGMEM port_to_mode_PGM[] = {
 84  	NOT_A_PORT,
 85  	NOT_A_PORT,
 86  	(uint16_t) &DDRB,
 87  };
 88  
 89  const uint16_t PROGMEM port_to_output_PGM[] = {
 90  	NOT_A_PORT,
 91  	NOT_A_PORT,
 92  	(uint16_t) &PORTB,
 93  };
 94  
 95  const uint16_t PROGMEM port_to_input_PGM[] = {
 96  	NOT_A_PIN,
 97  	NOT_A_PIN,
 98  	(uint16_t) &PINB,
 99  };
100  
101  const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
102  	PB, /* 0 */
103  	PB,
104  	PB,
105  	PB,
106  	PB, 
107  	PB, // 5
108  	PB, // A0
109  	PB,
110  	PB,
111  	PB, // A4
112  };
113  
114  const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[] = {
115  	_BV(0), /* 0, port B */
116  	_BV(1),
117  	_BV(2),
118  	_BV(3), /* 3 port B */
119  	_BV(4),
120  	_BV(5),
121  	_BV(5),
122  	_BV(2),
123  	_BV(4),
124  	_BV(3),
125  };
126  
127  const uint8_t PROGMEM digital_pin_to_timer_PGM[] = {
128  	TIMER0A, /* OC0A */
129  	TIMER0B,
130  	NOT_ON_TIMER,
131  	NOT_ON_TIMER,
132  	TIMER1B,
133  	NOT_ON_TIMER,
134  	NOT_ON_TIMER,
135  	NOT_ON_TIMER,
136  	NOT_ON_TIMER,
137  	NOT_ON_TIMER,
138  };
139  
140  #endif
141  
142  #endif