Adafruit LCD MCP23017 IC
#1
Posted 27 August 2012 - 09:38 AM
#2
Posted 27 August 2012 - 11:07 AM
My .NETMF projects: .NETMF Toolbox / Gadgeteer Light / Some PCB designs
#3
Posted 27 August 2012 - 01:16 PM
#4
Posted 27 August 2012 - 02:49 PM
Yep, that's why I prefer to drive such LCDs over SPI with a 74HC595, like explained at http://geekswithblog...id_crystal.aspxThanks Stefan, I have found it. But wat is the display slow.....You can easy see building up the row.
My .NETMF projects: .NETMF Toolbox / Gadgeteer Light / Some PCB designs
#5
Posted 25 October 2012 - 07:39 AM
Yep, that's why I prefer to drive such LCDs over SPI with a 74HC595, like explained at http://geekswithblog...id_crystal.aspx
But now we have a memory problem. With all our code and the toolbox hardware.dll it will not fit in the Netduino+. Is it possible to modify Toolbox Hardware dll so that only the display code is in the dll.? Else ... no display
thank you Ellen.
#6
Posted 25 October 2012 - 01:56 PM
My .NETMF projects: .NETMF Toolbox / Gadgeteer Light / Some PCB designs
#7
Posted 03 January 2013 - 02:54 AM
Stefan:
I'm having a problem using this shield with your toolbox code.
Everything builds fine and starts up well. I get an initial sign on message to display on the LCD and can read the buttons fine. My app periodically writes new data to the LCD (about every 3 seconds or so). At random, the LCD/buttons stop working. My app continues to run fine, but when I attempt to write to the LCD or read the state of the buttons, nothing on the shield works.
I suspect a problem with the I2C interface (the only way to recover from this is to power down the board).
Any thoughts?
Kelly
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