Serial LCD chip no ext Osc?

[fritz42_male]

Does anyone know of a serial LCD chip similar to the FRM010 the but that does not need an external Xtal?

I've bought 10 of these 16x2 LCD displays (http://unusualelectronics.co.uk/shop/index.php)

for only £11.50 and want to use them on some Picaxe projects but I'm trying to keep the board size and component count to a minimum.

 

[Svejk]

You send me one LCD and I'll send you a serial Picaxe Firmware to drive them. Deal?

 

[westaust55]

I am not aware of an alternative chip to the Rev Ed FRM010 specifically designed for LCD interfacing as a single chip solution as you seek.

An alternative is the approach used by Ron Hackett in his new book:
PICAXE Microcontroller Projects for the Evil Genius
See: http://www.jrhackett.net/

In that book, Ron has used a 20X2 PICAXE chip as the interface to accept serial commands and drive a parallel interface to an LCD display.
Ron has the programs for his projects available on his website.

I believe that the same has also been done in the past with a 14M PICAXE chip – try a search on this forum for the 14M solution.

 

[fritz42_male]

You send me one LCD and I'll send you a serial Picaxe Firmware to drive them. Deal?

When you say firmware, are you offering me a preprogrammed chip? If so sounds OK. Which chip is it?

 

[marks]

I,d try one of those serial drivers from toysdownunder
http://toysdownunder.com/arduino/lcd/serial-lcd-adapter.html
runs at 9600 for only $8.50 just need to solder a couple of headers

ive tried the 20x4 works great although have had no experience with the other offerings
these boards seem to be better ,good price , codes will be differrent tho.
http://www.picaxeforum.co.uk/showthread.php?t=16781

 

[premelec]

I use phanderson.com LCD117 type chip quite successfully
http://www.phanderson.com/lcd106/lcd107.html - for serial interface [actually I use an older 2400 baud chip that wulfden makes a board for... also http://www.wulfden.org/TheShoppe/k107/bundles.shtml][/url http://www.wulfden.org/TheShoppe/k107/index.shtml]

 

[fritz42_male]

Thanks for the toysdownunder suggestion Marks - picking up 2 of them in an hour!

Sveks - still interested as the toysdownunder may not be ideal.

Premelec - interesting, I didn't know he did those. May use them in future

Thanks all!

 

[Svejk]

I'll send you a program to make your own serial Picaxe Firmware along with a schematic and PCB artwork. The LCD is required for testing.

 

[fritz42_male]

Picked up 2 from toysdownunder.


Also found this one: http://www.redbinary.com/sld01a.php

 

[hippy]

I'd personally use a PICAXE-20X2 and high-speed serial. Any PICAXE with six output pins should work though maybe not work as well.

 

[inglewoodpete]

I'm with hippy (and Ron Hackett) on this one. The 20X2 SMD is tempting if space is limited.

 

[Svejk]

I'd personally use a PICAXE-20X2 and high-speed serial.

That's exactly what I had in mind. I've done one with a 14M at 600 baud, works ok. I find it easier to "roll my own" than use a serial firmware.

 

[Jamster]

I doubt you did it at 600 baud rate...

 

[fritz42_male]

What's wrong with 600 baud - it's twice as fast as 300 which I used to use on Acoustic Couplers!

 

[westaust55]

The 14M to LCD solution with hippys code to parallel output to the LCD is posted here:
http://www.picaxeforum.co.uk/showthread.php?p=67665

At 4MHz the SERIN command cannot function slower than 600 baud,
At 8Mhz the min speed is 1200 baud.
Dropping charcter may be a problem is too many consecutive SEROUT commands used but if Svejk says he has done it then I have no reason to doubt it.

However, as per post 3, I recommend consideration be given to use of the 20X2 as Ron Hackett has in his book.