2 replies to this topic

[xmen]

Is there any library that allows to write to LCD like LiquiqCrystal ? I tried
 
http://microliquidcr...l.codeplex.com/. But as I add its reference to project, something goes wrong with netduino, its led stays turned on and debugging gets auto closed. But as removed the reference, all works fine.
 
I tried LCD class from embedded-Lab, but it just flicks and all black boxes appear again..
 
What could be the problem ?
 
Thanks
 
Edit: After setting framework to 4.2 of microliquidcrystal, no more netduino light stays on, but text still not appearing. I even changed the pins.
 
 
Edit 2 :
 
Its 20x2 LCD, specs here http://www.microelec...act/ccm2020.pdf

 

var lcdProvider = new GpioLcdTransferProvider(
Pins.GPIO_PIN_D12, // RS
Pins.GPIO_PIN_D11, // ENABLE
Pins.GPIO_PIN_D5, // D4
Pins.GPIO_PIN_D4, // D5
Pins.GPIO_PIN_D3, // D6
Pins.GPIO_PIN_D2); // D7

var lcd = new Lcd(lcdProvider);
lcd.Begin(20, 2);
lcd.Write("Test");
Thread.Sleep(Timeout.Infinite);

[jrlyman3]

I haven't wired up my 20x2 display yet, but as near as I can tell your wiring looks good.  When I started with my 20x4 display I didn't get anything because I didn't know that I needed to hook up the contrast, it looks like you've got that covered.

 

Looking at your code it looks good too.  One thing that I do differently is to call Clear() and SetCursorPosition(0, 0) after the Begin() call.  It shouldn't matter since Begin() calls Clear() itself, but I can't see any other issues.

 

Check that all of your connections are good.  Maybe it's a bad display ... it happens.  Try hooking up the back light I'm using a 39 ohm resistor between pin15 and +5, pin16 to ground.

 

John

[xmen]

I doubled checked the connection, all seems good. As you said, I think the display lcd is crap. A better one will be coming soon, and I will be using Shifter 74HC575 to save some pins.