Arduino Mega ADK - Revision history

Admin: /* How to buy */

2014-05-23T10:51:13Z

How to buy

← Older revision		Revision as of 10:51, 23 May 2014
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	==How to buy==		==How to buy==
	Click here:
			Click here to buy [http://www.geeetech.com/arduino-mega-adk-p-569.html Arduino Mega ADK]

Admin: /* Overview */

2012-05-04T05:50:56Z

Overview

← Older revision		Revision as of 05:50, 4 May 2012
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	==Overview==		==Overview==
			[[Image:ArduinoADK_R3_Front_450px.jpg]]

	The Arduino ADK is a microcontroller board based on the ATmega2560 (datasheet). It has a USB host interface to connect with Android based phones, based on the MAX3421e IC. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.		The Arduino ADK is a microcontroller board based on the ATmega2560 (datasheet). It has a USB host interface to connect with Android based phones, based on the MAX3421e IC. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.
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	For information on using the board with the Android OS, see Google's ADK documentation.		For information on using the board with the Android OS, see Google's ADK documentation.

	~~[[Image:ArduinoADK_R3_Front_450px.jpg]]~~

	==Schematic, Reference Design & Pin Mapping==		==Schematic, Reference Design & Pin Mapping==

Admin at 06:47, 4 January 2012

2012-01-04T06:47:12Z

← Older revision		Revision as of 06:47, 4 January 2012
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	For installation follow the same procedure on [http://arduino.cc/en/Guide/Windows#toc4 how install an UNO board on your computer].		For installation follow the same procedure on [http://arduino.cc/en/Guide/Windows#toc4 how install an UNO board on your computer].

			==How to buy==
			Click here:

Admin: /* Automatic (Software) Reset */

2012-01-04T02:31:54Z

Automatic (Software) Reset

← Older revision		Revision as of 02:31, 4 January 2012
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	The ADK contains a trace that can be cut to disable the auto-reset. The pads on either side of the trace can be soldered together to re-enable it. It's labeled "RESET-EN". You may also be able to disable the auto-reset by connecting a 110 ohm resistor from 5V to the reset line; see this forum thread for details.		The ADK contains a trace that can be cut to disable the auto-reset. The pads on either side of the trace can be soldered together to re-enable it. It's labeled "RESET-EN". You may also be able to disable the auto-reset by connecting a 110 ohm resistor from 5V to the reset line; see this forum thread for details.


			[[Image:ArduinoADKBack450px.jpg]]

	==USB Overcurrent Protection==		==USB Overcurrent Protection==

Admin: /* Memory */

2012-01-04T02:30:34Z

Memory

← Older revision		Revision as of 02:30, 4 January 2012
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	The ADK has 256 KB of flash memory for storing code (of which 8 KB is used for the bootloader), 8 KB of SRAM and 4 KB of EEPROM (which can be read and written with the EEPROM library).		The ADK has 256 KB of flash memory for storing code (of which 8 KB is used for the bootloader), 8 KB of SRAM and 4 KB of EEPROM (which can be read and written with the EEPROM library).


			[[Image:ArduinoADKFront450px.jpg]]

	==Input and Output==		==Input and Output==

Admin: /* Summary */

2012-01-04T02:29:23Z

Summary

← Older revision		Revision as of 02:29, 4 January 2012
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	Clock Speed 16 MHz		Clock Speed 16 MHz

			[[Image:ArduinoADK_R3_Back_450px.jpg]]

	==Power==		==Power==

Admin: /* Drivers & Setup */

2012-01-04T02:28:03Z

Drivers & Setup

← Older revision		Revision as of 02:28, 4 January 2012
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	With this board you need to change the boards.txt file in your Arduino directory (find it in: "Arduino-00xx > hardware > arduino"):		With this board you need to change the boards.txt file in your Arduino directory (find it in: "Arduino-00xx > hardware > arduino"):

	Arduino 0022 or older boards.txt		Arduino 0022 or older boards.txt

	Arduino 1.0 Beta boards1.0.txt		Arduino 1.0 Beta boards1.0.txt

	[To be downladed, this files are compressed into a zip archive, so you need to unzip them into the directory described above.]		[To be downladed, this files are compressed into a zip archive, so you need to unzip them into the directory described above.]
	Windows users in order to get working the board need a .inf file for this specific product: Arduino_ADK.zip
	For installation follow the same procedure on how install an UNO board on your computer.		Windows users in order to get working the board need a .inf file for this specific product: [http://arduino.cc/en/uploads/Main/Arduino_ADK.zip Arduino_ADK.zip]

			For installation follow the same procedure on [http://arduino.cc/en/Guide/Windows#toc4 how install an UNO board on your computer].

Admin: /* Physical Characteristics and Shield Compatibility */

2012-01-04T02:26:24Z

Physical Characteristics and Shield Compatibility

← Older revision		Revision as of 02:26, 4 January 2012
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	The maximum length and width of the ADK PCB are 4 and 2.1 inches respectively, with the USB connector and power jack extending beyond the former dimension. Three screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.		The maximum length and width of the ADK PCB are 4 and 2.1 inches respectively, with the USB connector and power jack extending beyond the former dimension. Three screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16"), not an even multiple of the 100 mil spacing of the other pins.

	The ADK is designed to be compatible with most shields designed for the Uno, Diecimila or Duemilanove. Digital pins 0 to 13 (and the adjacent AREF and GND pins), analog inputs 0 to 5, the power header, and ICSP header are all in equivalent locations. Further the main UART (serial port) is located on the same pins (0 and 1), as are external interrupts 0 and 1 (pins 2 and 3 respectively). SPI is available through the ICSP header on both the ADK and Duemilanove / Diecimila. Please note that I2C is not located on the same pins on the ADK (20 and 21) as the Duemilanove / Diecimila (analog inputs 4 and 5).		The ADK is designed to be compatible with most shields designed for the Uno, Diecimila or Duemilanove. Digital pins 0 to 13 (and the adjacent AREF and GND pins), analog inputs 0 to 5, the power header, and ICSP header are all in equivalent locations. Further the main UART (serial port) is located on the same pins (0 and 1), as are external interrupts 0 and 1 (pins 2 and 3 respectively). SPI is available through the ICSP header on both the ADK and Duemilanove / Diecimila. Please note that I2C is not located on the same pins on the ADK (20 and 21) as the Duemilanove / Diecimila (analog inputs 4 and 5).

Admin: /* Automatic (Software) Reset */

2012-01-04T02:25:54Z

Automatic (Software) Reset

← Older revision		Revision as of 02:25, 4 January 2012
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	Rather then requiring a physical press of the reset button before an upload, the Arduino ADK is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the ATmega8U2 is connected to the reset line of the ATmega2560 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.		Rather then requiring a physical press of the reset button before an upload, the Arduino ADK is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the ATmega8U2 is connected to the reset line of the ATmega2560 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.

	This setup has other implications. When the ADK is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software (via USB). For the following half-second or so, the bootloader is running on the ADK. While it is programmed to ignore malformed data (i.e. anything besides an upload of new code), it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.		This setup has other implications. When the ADK is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software (via USB). For the following half-second or so, the bootloader is running on the ADK. While it is programmed to ignore malformed data (i.e. anything besides an upload of new code), it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.

	The ADK contains a trace that can be cut to disable the auto-reset. The pads on either side of the trace can be soldered together to re-enable it. It's labeled "RESET-EN". You may also be able to disable the auto-reset by connecting a 110 ohm resistor from 5V to the reset line; see this forum thread for details.		The ADK contains a trace that can be cut to disable the auto-reset. The pads on either side of the trace can be soldered together to re-enable it. It's labeled "RESET-EN". You may also be able to disable the auto-reset by connecting a 110 ohm resistor from 5V to the reset line; see this forum thread for details.

Admin: /* Programming */

2012-01-04T02:25:05Z

Programming

← Older revision		Revision as of 02:25, 4 January 2012
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	The Arduino ADK can be programmed with the Arduino software (download). For details, see the reference and tutorials.		The Arduino ADK can be programmed with the Arduino software (download). For details, see the reference and tutorials.

	The ATmega2560 on the Arduino ADK comes preburned with a bootloader (the same on Mega 2560) that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500v2 protocol (reference, C header files).		The ATmega2560 on the Arduino ADK comes preburned with a bootloader (the same on Mega 2560) that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500v2 protocol (reference, C header files).

	You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header; see these instructions for details.		You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header; see these instructions for details.

	The ATmega16U2 (or 8U2 in the rev1 and rev2 boards) firmware source code is available in the Arduino repository. The ATmega16U2/8U2 is loaded with a DFU bootloader, which can be activated by:		The ATmega16U2 (or 8U2 in the rev1 and rev2 boards) firmware source code is available in the Arduino repository. The ATmega16U2/8U2 is loaded with a DFU bootloader, which can be activated by:
	On Rev1 boards: connecting the solder jumper on the back of the board (near the map of Italy) and then resetting the 8U2.
	On Rev2 or later boards: there is a resistor that pulling the 8U2/16U2 HWB line to ground, making it easier to put into DFU mode. You can then use Atmel's FLIP software (Windows) or the DFU programmer (Mac OS X and Linux) to load a new firmware. Or you can use the ISP header with an external programmer (overwriting the DFU bootloader). See this user-contributed tutorial for more information.		*On Rev1 boards: connecting the solder jumper on the back of the board (near the map of Italy) and then resetting the 8U2.

			*On Rev2 or later boards: there is a resistor that pulling the 8U2/16U2 HWB line to ground, making it easier to put into DFU mode. You can then use Atmel's FLIP software (Windows) or the DFU programmer (Mac OS X and Linux) to load a new firmware. Or you can use the ISP header with an external programmer (overwriting the DFU bootloader). See this user-contributed tutorial for more information.

	==Automatic (Software) Reset==		==Automatic (Software) Reset==