Hi,
I have been trying to design a board for control of a telescope. The software is written in Arduino for the Mega1280. However, I want to be able to release the design as a DIY thing, and to be able to use it without having a seperate arduino board.
The issue is that the program requires two 16bit timers, which means that it would need an Arduino mega. But the mega is an horrible TQFP package, which is a pain in the neck to solder (I've done it a couple of times successfully, but its not really a DIY friendly thing).
I was looking through the Atmel product list, and the Atmega162 also has two 16 bit timers, but best of all is available as a DIP package. It is also supported by avrdude and gcc.
I have started making some of the files for it, including the code for boards.txt, and the pins_arduino file (included below). But I am not sure how to go about modifying and creating a bootloader hex file for it. Any help would be greatly appreciated.
I should mention that I dont have the chip yet as I wanted to check feasibility of adding a different part first before buying one.
Thanks for any help.
Tom.
boards.txt
##############################################################
atmega162.name=AstroEQ w/ ATmega162
atmega162.upload.protocol=arduino
atmega162.upload.maximum_size=14336
atmega162.upload.speed=19200
atmega162.bootloader.low_fuses=0xFF
atmega162.bootloader.high_fuses=0xDA
atmega162.bootloader.extended_fuses=0xFB
atmega162.bootloader.path=atmega
atmega162.bootloader.file=ATmegaBOOT_atmega168_atmega162.hex
atmega162.bootloader.unlock_bits=0x3F
atmega162.bootloader.lock_bits=0x0F
atmega162.build.mcu=atmega162
atmega162.build.f_cpu=16000000L
atmega162.build.core=arduino
atmega162.build.variant=AstroEQ
##############################################################
pins_arduino.h
/*
pins_arduino.h - Pin definition functions for Arduino
Part of Arduino - http://www.arduino.cc/
Copyright (c) 2007 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
$Id: wiring.h 249 2007-02-03 16:52:51Z mellis $
*/
#ifndef Pins_Arduino_h
#define Pins_Arduino_h
#include <avr/pgmspace.h>
#define NUM_DIGITAL_PINS 35
#define NUM_ANALOG_INPUTS 0
#define analogInputToDigitalPin(p) (-1)
#define digitalPinHasPWM(p) ((p) == 5 || (p) == 6 || (p) == 8 || (p) == 9 || (p) == 10 || (p) == 30)
const static uint8_t SS = 10;
const static uint8_t MOSI = 11;
const static uint8_t MISO = 12;
const static uint8_t SCK = 13;
const static uint8_t LED_BUILTIN = 13;
#define digitalPinToPCICR(p) ( (((p) >= 14) && ((p) <= 17)) || \
(((p) >= 20) && ((p) <= 27)) || \
(((p) >= 31) && ((p) <= 34)) ? (&PCICR) : ((uint8_t *)0) )
#define digitalPinToPCICRbit(p) ( (((p) >= 20) && ((p) <= 27)) ? 0 : 1 )
#define digitalPinToPCMSK(p) ( (((p) >= 20) && ((p) <= 27)) ? (&PCMSK0) : \
(((p) >= 14) && ((p) <= 17)) || \
(((p) >= 31) && ((p) <= 34)) ? (&PCMSK1) : ((uint8_t *)0) )
#define digitalPinToPCMSKbit(p) ( (((p) >= 20) && ((p) <= 27)) ? ((p) - 20) : \
(((p) >= 14) && ((p) <= 17)) ? ((p) - 14) : ((p) - 27) )
#ifdef ARDUINO_MAIN
// On the Arduino board, digital pins are also used
// for the analog output (software PWM). Analog input
// pins are a separate set.
// ATMEL ATMEGA8 & 168 / ARDUINO
//
// +-\/-+
// PWM (D 8) PB0 1| |28 VCC
// PWM (D 9) PB1 2| |27 PA0 (D14)
// (D19) PB2 3| |26 PA1 (D15)
// (D18) PB3 4| |25 PA2 (D16)
// PWM (D10) PB4 5| |24 PA3 (D17)
// (D11) PB5 6| |23 PA4 (D31)
// (D12) PB6 7| |22 PA5 (D32)
// (D13) PB7 8| |21 PA6 (D33)
// RST 9| |20 PA7 (D34)
// (D 0) PD0 10| |19 PE0 (D28)
// (D 1) PD1 11| |18 PE1 (D29)
// (D 2) PD2 12| |17 PE2 (D30) PWM
// (D 3) PD3 13| |16 PC7 (D27)
// PWM (D 5) PD4 14| |15 PC6 (D26)
// PWM (D 6) PD5 15| |24 PC5 (D25)
// (D 4) PD6 16| |23 PC4 (D24)
// (D 7) PD7 17| |22 PC3 (D23)
// XT2 18| |21 PC2 (D22)
// XT1 19| |20 PC1 (D21)
// GND 20| |19 PC0 (D20)
// +----+
//
//
//
//0
//2
//3B
// 1B
//3A
//1A
// these arrays map port names (e.g. port B) to the
// appropriate addresses for various functions (e.g. reading
// and writing)
const uint16_t PROGMEM port_to_mode_PGM[] = {
NOT_A_PORT,
(uint16_t) &DDRA,
(uint16_t) &DDRB,
(uint16_t) &DDRC,
(uint16_t) &DDRD,
};
const uint16_t PROGMEM port_to_output_PGM[] = {
NOT_A_PORT,
(uint16_t) &PORTA,
(uint16_t) &PORTB,
(uint16_t) &PORTC,
(uint16_t) &PORTD,
};
const uint16_t PROGMEM port_to_input_PGM[] = {
NOT_A_PORT,
(uint16_t) &PINA,
(uint16_t) &PINB,
(uint16_t) &PINC,
(uint16_t) &PIND,
};
const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
PD, /* 0 */
PD,
PD,
PD,
PD,
PD,
PD,
PD,
PB, /* 8 */
PB,
PB,
PB,
PB,
PB,
PA, /* 14 */
PA,
PA,
PA,
PB, /* 18 */
PB,
PC, /* 20 */
PC,
PC,
PC,
PC,
PC,
PC,
PC,
PE, /* 28 */
PE,
PE,
PA, /* 31 */
PA,
PA,
PA,
};
const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[] = {
_BV(0), /* 0, port D */
_BV(1),
_BV(2),
_BV(3),
_BV(5),
_BV(6),
_BV(4),
_BV(7),
_BV(0), /* 8, port B */
_BV(1),
_BV(4),
_BV(5),
_BV(6),
_BV(7),
_BV(0), /* 14, port A */
_BV(1),
_BV(2),
_BV(3),
_BV(2), /* 18, port B */
_BV(3),
_BV(0), /* 20, port C */
_BV(1),
_BV(2),
_BV(3),
_BV(4),
_BV(5),
_BV(6),
_BV(7),
_BV(0), /* 28, port E */
_BV(1),
_BV(2),
_BV(4), /* 31, port A */
_BV(5),
_BV(6),
_BV(7),
};
const uint8_t PROGMEM digital_pin_to_timer_PGM[] = {
NOT_ON_TIMER, /* 0 - port D */
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
TIMER3A,
TIMER1A,
NOT_ON_TIMER,
TIMER0, /* 8 - port B */
TIMER2,
TIMER3B,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,/* 14, port A */
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER, /* 18, port B */
NOT_ON_TIMER,
NOT_ON_TIMER, /* 20, port C */
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER, /* 28, port E */
NOT_ON_TIMER,
TIMER1B,
NOT_ON_TIMER, /* 31, port A */
NOT_ON_TIMER,
NOT_ON_TIMER,
NOT_ON_TIMER,
};
#endif
#endif
