Arduino IDE compatibility with ATmega2561

Development Libraries
#1

Hello,

It’s my first topic in this forum , i hope you will help me to find a solution at my problem.

My problem :
I’ve made a project based on a ATmega328 , but today i need more memory and i’ve decided to use a ATmega2561.
I’ve made all the cores and the pin configuration file. I can compiling without error and i can upload to the atmega2561. The program run well but i’ve a problems with two pin : PE5 and PE6.
PE6 influence without reason the PE5 pin. When the PE6 became Low , the PE5 became high but the problem don’t come from my program. I think it’s the config file.

Can you help me too solve this problem ?

Thx a lot.

mega2561.name=Arduino Mega 2561

mega2561.upload.protocol=wiring
mega2561.upload.maximum_size=258048
mega2561.upload.speed=115200

mega2561.bootloader.low_fuses=0xCF
mega2561.bootloader.high_fuses=0x99
mega2561.bootloader.extended_fuses=0xFF
mega2561.bootloader.path=stk500v2
mega2561.bootloader.file=stk500boot_v2_mega2561.hex
mega2561.bootloader.unlock_bits=0x3F
mega2561.bootloader.lock_bits=0x0F

mega2561.build.mcu=atmega2561
mega2561.build.f_cpu=16000000L
mega2561.build.core=arduino
mega2561.build.variant=mega2561

#ifndef Pins_Arduino_h
#define Pins_Arduino_h

#include <avr/pgmspace.h>

#define NUM_DIGITAL_PINS            54
#define NUM_ANALOG_INPUTS           8
#define analogInputToDigitalPin(p)  ((p < 8) ? (p) + 46 : -1)
#define digitalPinHasPWM(p)         ( ((p) >= 3 && (p) <= 5) || ((p) >= 12 && (p)<= 15) || ((p) == 45 ) )

static const uint8_t SS   = 8;
static const uint8_t SCK  = 9;
static const uint8_t MOSI = 10;
static const uint8_t MISO = 11;

static const uint8_t SCL = 16;
static const uint8_t SDA = 17;

static const uint8_t LED_BUILTIN = 13;

static const uint8_t A0 = 46;
static const uint8_t A1 = 47;
static const uint8_t A2 = 48;
static const uint8_t A3 = 49;
static const uint8_t A4 = 50;
static const uint8_t A5 = 51;
static const uint8_t A6 = 52;
static const uint8_t A7 = 53;

/* PCINT PIN DEFINE */

// 8,9,10,11,12,13,14,15 //

#define digitalPinToPCICR(p)    ( (((p) >= 8) && ((p) <= 15)) ? (&PCICR) : ((uint8_t *)0) )

#define digitalPinToPCICRbit(p) ( (((p) >= 8) && ((p) <= 15)) ? 0 : 0 )

#define digitalPinToPCMSK(p)    ( (((p) >= 8) && ((p) <= 15)) ? (&PCMSK0) : ((uint8_t *)0) )

#define digitalPinToPCMSKbit(p) ( (((p) >= 8) && ((p) <= 15)) ? ((p) - 8) : 0 )
                                
								
#ifdef ARDUINO_MAIN

const uint16_t PROGMEM port_to_mode_PGM[] = {
	NOT_A_PORT,
	(uint16_t) &DDRA,
	(uint16_t) &DDRB,
	(uint16_t) &DDRC,
 	(uint16_t) &DDRD,
	(uint16_t) &DDRE,
	(uint16_t) &DDRF,
	(uint16_t) &DDRG,
};

const uint16_t PROGMEM port_to_output_PGM[] = {
	NOT_A_PORT,
	(uint16_t) &PORTA,
	(uint16_t) &PORTB,
	(uint16_t) &PORTC,
 	(uint16_t) &PORTD,
	(uint16_t) &PORTE,
	(uint16_t) &PORTF,
	(uint16_t) &PORTG,	
};

const uint16_t PROGMEM port_to_input_PGM[] = {
	NOT_A_PIN,
	(uint16_t) &PINA,
	(uint16_t) &PINB,
	(uint16_t) &PINC,
	(uint16_t) &PIND,
	(uint16_t) &PINE,
	(uint16_t) &PINF,
	(uint16_t) &PING,
};

const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
	// PORTLIST		
	// -------------------------------------------		
	PE	, // PE 0 ** 0 ** USART0_RX	
	PE	, // PE 1 ** 1 ** USART0_TX	
	PE	, // PE 2 ** 2 ** D2	
	PE	, // PE 3 ** 3 ** PWM1	
	PE	, // PE 4 ** 4 ** PWM2	
	PE	, // PE 5 ** 5 ** PWM3	
	PE	, // PE 6 ** 6 ** D6	
	PE	, // PE 7 ** 7 ** D7
	PB	, // PB 0 ** 8 ** SPI_SS
	PB	, // PB 1 ** 9 ** SPI_SCK
	PB	, // PB 2 ** 10 ** SPI_MOSI	
	PB	, // PB 3 ** 11 ** SPI_MISO			
	PB	, // PB 4 ** 12 ** PWM4	
	PB	, // PB 5 ** 13 ** PWM5	
	PB	, // PB 6 ** 14 ** PWM6	
	PB	, // PB 7 ** 15 ** PWM7
	PD	, // PD 0 ** 16 ** I2C_SCL
	PD	, // PD 1 ** 17 ** I2C_SDA
	PD	, // PD 2 ** 18 ** USART1_RX		
	PD	, // PD 3 ** 19 ** USART1_TX	
	PD	, // PD 4 ** 20 ** D20
	PD	, // PD 5 ** 21 ** D21		
	PD	, // PD 6 ** 22 ** D22	
	PD	, // PD 7 ** 23 ** D23		
	PC	, // PC 0 ** 24 ** D24	
	PC	, // PC 1 ** 25 ** D25	
	PC	, // PC 2 ** 26 ** D26	
	PC	, // PC 3 ** 27 ** D27	
	PC	, // PC 4 ** 28 ** D28	
	PC	, // PC 5 ** 29 ** D29	
	PC	, // PC 6 ** 30 ** D30	
	PC	, // PC 7 ** 31 ** D31		
	PA	, // PA 7 ** 32 ** D32	
	PA	, // PA 6 ** 33 ** D33	
	PA	, // PA 5 ** 34 ** D34	
	PA	, // PA 4 ** 35 ** D35	
	PA	, // PA 3 ** 36 ** D36	
	PA	, // PA 2 ** 37 ** D37	
	PA	, // PA 1 ** 38 ** D38	
	PA	, // PA 0 ** 39 ** D39
	PG	, // PG 0 ** 40 ** D40	
	PG	, // PG 1 ** 41 ** D41	
	PG	, // PG 2 ** 42 ** D42
	PG	, // PG 3 ** 43 ** D43	
	PG	, // PG 4 ** 44 ** D44	
	PG	, // PG 5 ** 45 ** PWM8		
	PF	, // PF 0 ** 46 ** A0	
	PF	, // PF 1 ** 47 ** A1	
	PF	, // PF 2 ** 48 ** A2	
	PF	, // PF 3 ** 49 ** A3	
	PF	, // PF 4 ** 50 ** A4	
	PF	, // PF 5 ** 51 ** A5	
	PF	, // PF 6 ** 52 ** A6	
	PF	, // PF 7 ** 53 ** A7
	
	
};

const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[] = {
	// PIN IN PORT		
	// -------------------------------------------		
	_BV( 0 )	, // PE 0 ** 0 ** USART0_RX	
	_BV( 1 )	, // PE 1 ** 1 ** USART0_TX	
	_BV( 2 )	, // PE 2 ** 2 ** D2	
	_BV( 3 )	, // PE 3 ** 3 ** PWM1	
	_BV( 4 )	, // PE 4 ** 4 ** PWM2
	_BV( 5 )	, // PE 5 ** 5 ** PWM3	
	_BV( 6 )	, // PE 6 ** 6 ** D6
	_BV( 7 )	, // PE 7 ** 7 ** D7
	_BV( 0 )	, // PB 0 ** 8 ** SPI_SS
	_BV( 1 )	, // PB 1 ** 9 ** SPI_SCK	
	_BV( 2 )	, // PB 2 ** 10 ** SPI_MOSI	
	_BV( 3 )	, // PB 3 ** 11 ** SPI_MISO		
	_BV( 4 )	, // PB 4 ** 12 ** PWM4	
	_BV( 5 )	, // PB 5 ** 13 ** PWM5	
	_BV( 6 )	, // PB 6 ** 14 ** PWM6	
	_BV( 7 )	, // PB 7 ** 15 ** PWM7
	_BV( 0 )	, // PD 0 ** 16 ** I2C_SCL	
	_BV( 1 )	, // PD 1 ** 17 ** I2C_SDA
	_BV( 2 )	, // PD 2 ** 18 ** USART1_RX		
	_BV( 3 )	, // PD 3 ** 19 ** USART1_TX	
	_BV( 4 )	, // PD 4 ** 20 ** D20
	_BV( 5 )	, // PD 5 ** 21 ** D21
	_BV( 6 )	, // PD 6 ** 22 ** D22
	_BV( 7 )	, // PD 7 ** 23 ** D23
	_BV( 0 )	, // PC 0 ** 24 ** D24	
	_BV( 1 )	, // PC 1 ** 25 ** D25	
	_BV( 2 )	, // PC 2 ** 26 ** D26	
	_BV( 3 )	, // PC 3 ** 27 ** D27	
	_BV( 4 )	, // PC 4 ** 28 ** D28	
	_BV( 5 )	, // PC 5 ** 29 ** D29	
	_BV( 6 )	, // PC 6 ** 30 ** D30	
	_BV( 7 )	, // PC 7 ** 31 ** D31
 	_BV( 7 )	, // PA 7 ** 32 ** D32	
	_BV( 6 )	, // PA 6 ** 33 ** D33	
	_BV( 5 )	, // PA 5 ** 34 ** D34	
	_BV( 4 )	, // PA 4 ** 35 ** D35	
	_BV( 3 )	, // PA 3 ** 36 ** D36	
	_BV( 2 )	, // PA 2 ** 37 ** D37	
	_BV( 1 )	, // PA 1 ** 38 ** D38	
	_BV( 0 )	, // PA 0 ** 39 ** D39	
	_BV( 0 )	, // PG 0 ** 40 ** D40	
	_BV( 1 )	, // PG 1 ** 41 ** D41	
	_BV( 2 )	, // PG 2 ** 42 ** D42	
	_BV( 3 )	, // PG 3 ** 43 ** D43
	_BV( 4 )	, // PG 4 ** 44 ** D44
	_BV( 5 )	, // PG 5 ** 45 ** PWM8
	_BV( 0 )	, // PF 0 ** 46 ** A0	
	_BV( 1 )	, // PF 1 ** 47 ** A1	
	_BV( 2 )	, // PF 2 ** 48 ** A2
	_BV( 3 )	, // PF 3 ** 49 ** A3	
	_BV( 4 )	, // PF 4 ** 50 ** A4	
	_BV( 5 )	, // PF 5 ** 51 ** A5	
	_BV( 6 )	, // PF 6 ** 52 ** A6	
	_BV( 7 )	, // PF 7 ** 53 ** A7	
};

const uint8_t PROGMEM digital_pin_to_timer_PGM[] = {
	// TIMERS		
	// -------------------------------------------		
	NOT_ON_TIMER	, // PE 0 ** 0 ** USART0_RX	
	NOT_ON_TIMER	, // PE 1 ** 1 ** USART0_TX	
	NOT_ON_TIMER	, // PE 2 ** 2 ** D2	
	TIMER3A	  	 	, // PE 3 ** 3 ** PWM1	
	TIMER3B			, // PE 4 ** 4 ** PWM2
	TIMER3C			, // PE 5 ** 5 ** PWM3
	NOT_ON_TIMER	, // PE 6 ** 6 ** D6
	NOT_ON_TIMER	, // PE 7 ** 7 ** D7
	NOT_ON_TIMER	, // PB 0 ** 8 ** SPI_MISO	
	NOT_ON_TIMER	, // PB 1 ** 9 ** SPI_MOSI	
	NOT_ON_TIMER	, // PB 2 ** 10 ** SPI_SCK	
	NOT_ON_TIMER	, // PB 3 ** 11 ** SPI_SS
	TIMER2A		, // PB 4 ** 12 ** PWM4	
	TIMER1A		, // PB 5 ** 13 ** PWM5	
	TIMER1B		, // PB 6 ** 14 ** PWM6	
	TIMER0A		, // PB 7 ** 15 ** PWM7
	NOT_ON_TIMER	, // PD 0 ** 16 ** I2C_SCL
	NOT_ON_TIMER	, // PD 1 ** 17 ** I2C_SDA	
	NOT_ON_TIMER	, // PD 2 ** 18 ** USART1_RX	
	NOT_ON_TIMER	, // PD 3 ** 19 ** USART1_TX
	NOT_ON_TIMER	, // PD 4 ** 20 ** D20
	NOT_ON_TIMER	, // PD 5 ** 21 ** D21
	NOT_ON_TIMER	, // PD 6 ** 22 ** D22
	NOT_ON_TIMER	, // PD 7 ** 23 ** D23		
	NOT_ON_TIMER	, // PC 0 ** 24 ** D24	
	NOT_ON_TIMER	, // PC 1 ** 25 ** D25	
	NOT_ON_TIMER	, // PC 2 ** 26 ** D26	
	NOT_ON_TIMER	, // PC 3 ** 27 ** D27	
	NOT_ON_TIMER	, // PC 4 ** 28 ** D28	
	NOT_ON_TIMER	, // PC 5 ** 29 ** D29	
	NOT_ON_TIMER	, // PC 6 ** 30 ** D30	
	NOT_ON_TIMER	, // PC 7 ** 31 ** D31		
	NOT_ON_TIMER	, // PA 7 ** 32 ** D32	
	NOT_ON_TIMER	, // PA 6 ** 33 ** D33	
	NOT_ON_TIMER	, // PA 5 ** 34 ** D34	
	NOT_ON_TIMER	, // PA 4 ** 35 ** D35	
	NOT_ON_TIMER	, // PA 3 ** 36 ** D36	
	NOT_ON_TIMER	, // PA 2 ** 37 ** D37	
	NOT_ON_TIMER	, // PA 1 ** 38 ** D38	
	NOT_ON_TIMER	, // PA 0 ** 39 ** D39	
	NOT_ON_TIMER	, // PG 0 ** 40 ** D40	
	NOT_ON_TIMER	, // PG 1 ** 41 ** D41		
	NOT_ON_TIMER	, // PG 2 ** 42 ** D42	
	NOT_ON_TIMER	, // PG 3 ** 43 ** D43	
	NOT_ON_TIMER	, // PG 4 ** 44 ** D44	
	TIMER0B		, // PG 5 ** 45 ** PWM4		
	NOT_ON_TIMER	, // PF 0 ** 46 ** A0	
	NOT_ON_TIMER	, // PF 1 ** 47 ** A1	
	NOT_ON_TIMER	, // PF 2 ** 48 ** A2	
	NOT_ON_TIMER	, // PF 3 ** 49 ** A3	
	NOT_ON_TIMER	, // PF 4 ** 50 ** A4	
	NOT_ON_TIMER	, // PF 5 ** 51 ** A5	
	NOT_ON_TIMER	, // PF 6 ** 52 ** A6	
	NOT_ON_TIMER	, // PF 7 ** 53 ** A7	
};

#endif

#endif
#2

I’m not seeing anything obvious there.
I don’t quite understand what this line does:

#define analogInputToDigitalPin(p)  ((p < 8) ? (p) + 46 : -1)

when the analogs are 46 to 53.

#3

Hello,

Thank’s a lot for your answer.

It’s when you use the number of the analogpin instead of A0. For exemple : “analogWrite(0,HIGH)”
ADC is from 0 to 7 , so if the user write 2 in the analogWrite , the compiler can find witch pin is it because : 2 < 8 => true so 46+2 => 48.

Thx

#4

Ok, thanks. That cryptic, uncommented C code always gets me.

Any progress on the PE5/6 problem?

#5

No , still the same problem...

For information, the PE5 is configured like a digital input and PE6 like external interrupt.
The problem can come from the fact that both are external interrupt pin ?

Thx

#6

Now it's starting to sound like an issue with your sketch.
digital input and external interrupt are both digital inputs.
Are you turning the internal pullup off & on or something?

We can only guess until you post some code.

#7

How can i know if i set on/off the internal pull up resistor ?

Sorry but I can't post the code for now. The code work perfect with the Atmega328P so i think's it's a problems of configuration.

Thx a lot

#8

sysmathick:
How can i know if i set on/off the internal pull up resistor ?

Sorry but I can't post the code for now. The code work perfect with the Atmega328P so i think's it's a problems of configuration.

Thx a lot

It's performed in the pinMode() function, hence the need to see the code.

#9

Normally:
pinMode (pinX, INPUT);
digitalWrite (pinX, HIGH); // turns on internal pullup
and then
digitalWrite (pinX, LOW); // turns off internal pullup

so if your code was performing digitalWrites to an input pin, odd things might happen.

#10

Also the more current method:

pinMode (pinX, INPUT_PULLUP); // enable internal pull-up for pinX

pinMode (pinX, INPUT); // disable internal pull-up if prior was enabled, default from reset or power up is disabled.

#11

INPUT_PULLUP might not be supported for non-official chips like 2561 tho.

#12

CrossRoads:
INPUT_PULLUP might not be supported for non-official chips like 2561 tho.

Do you mean if the 2561 has programmable internal pull-ups in hardware or not? Otherwise it's just what version of the pinMode() library version one is using, i.e. what IDE version one is trying to add 2561 support.

#13

No, I mean the INPUT_PULLUP command might not be supported for 2561. The internal pullups are still there.

#14

CrossRoads:
No, I mean the INPUT_PULLUP command might not be supported for 2561. The internal pullups are still there.

But INPUT_PULLUP is not a function, it's just a macro defining a value that the current pinMode() function uses, so is not tied to any specific AVR chip, but rather just to the current IDE's pinMode function. But maybe I'm missing something?

#15

Must be missing something - it was not working with 1284's.

#16

Hello

Thx a lot for your reply.
I'll try this soon because for the digital input i don't make digitalwrite...

#17