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NetduinoPLus - Hitting GPIO limitations

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#1 Earthed



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Posted 01 August 2011 - 01:01 AM

Hi List, I'm trying top do a project that uses the following features: - Web Host (OK) - Serial (OK) - keypad 3x4 matrix (OK) - SD card, (OK) - Keypad Buzzer (OK) - External Keypad / Mode LED (NO ROOM!!!!) Already the NetduinoPlus is fully utilized (as per pin assignments below). Are there plans to do a Netduino with capability of the Arduino Mega? This would be really powerful. My only alternate solution at present is to use an SPI I/O Expansion Thoughts Welcome? GPIO0 DRXD GPIO1 DTXD GPIO2 KBD INPUT GPIO3 KBD INPUT GPIO4 SPI1_NPCS0 GPIO5 KBD INPUT GPIO6 KBD INPUT GPIO7 BUZZER OUTPUT GPIO8 KBD OUTPUT GPIO9 KBD OUTPUT GPIO10 KBD OUTPUT GPIO11 SPI1_MOSI GPIO12 SPI1_MISO_RSV GPIO13 SPI1_SPCK

#2 Omar (OZ)

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Posted 01 August 2011 - 01:31 AM

you could make a single pin analog keypad... like this http://www.instructa...eypad-Backpack/ to free up some pins from the 3x4 one

#3 Stefan



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Posted 01 August 2011 - 06:29 AM

You could also use some nifty circuits to increase your I/O's: http://forums.netdui...h-the-netduino/
"Fact that I'm a moderator doesn't make me an expert in things." Stefan, the eternal newb!
My .NETMF projects: .NETMF Toolbox / Gadgeteer Light / Some PCB designs

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