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Can anyone recommend a rock-solid LCD display?


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#1 BruceN

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Posted 05 July 2014 - 07:15 AM

-Hi all, first post and new to the Netduino world. Background about me: about 5-7 years .net c# experience, on and off, some commercial, some not.

 

I've been having about a 20% success rate with the Freetronics LCD shield, and this is really hampering my real work with industrial serial I/O. The dratted thing more often than not ignores what I send to it, and usually just spits out garbage. Except once in a while it plays ball, showing the correct data and I've not yet been able to figure out a pattern to its madness.

 

Now, I'm not a 'tard, I do understand serial protocol handshaking, and even think I understand how magnets work, but this has me beat.

 

Could any enlightened soul either:

 

Help me to get the damn thing to work,

 

OR

 

Point me at a better (working) product.

 

Thanks, Bruce.



#2 wendo

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Posted 06 July 2014 - 04:44 AM

Typically when I see that behavior on an LCD my first impression is I'm sending it data too fast. In saying that, most of my experience with LCD's has been either with serial LCD's or SPI/I2C ones as I hate having to dedicate heaps of pins to drive a screen



#3 KiwiDev

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Posted 08 July 2014 - 09:10 AM

Hi Bruce,

 

I had what sounds like a similar problem with a 16x2 LCD Shield and a GPS Shield. The NEMA output of the GPS shield ran at 38k4 baud which appeared to cause the LCD to frequently display random junk. When I used GPS devices which ran at 4k8 & 9k6 the problem rarely occured.

 

After some experimentation I found it was the driver class I was using rather than the kit.

 

The design of some LCD libraries appears to be more tolerant of CPU usage by other threads and after trialing several I found the one from embedded lab worked in my scenario. It might be worth trialling a couple of different libraries to see how they work with your kit.

 

Otherwise, as per Wendo's posting try a serial or I2C display. I use a display with a serial back pack which are available from several vendors.

 

Bryn



#4 BruceN

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Posted 10 July 2014 - 08:18 AM

Thank you gentlemen for your input, and sorry for the delay in replying. Life, etc. I will investigate accordingly and report any results. Thanks, again guys :-)



#5 baxter

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Posted 10 July 2014 - 11:38 PM

I have been using the BPI-216N/L Serial Text LCD for years. The COM port interface is about as simple as you can get.
http://www.seetron.com/products.html
It's a bit pricey and you can get something better with a serial interface for about the same price (look under Intelligent Display modules),
http://www.4dsystems.com.au/products
http://www.4dsystems...brief_R_1_1.pdf

 

I have the older version of this module and it is a very readable display.






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