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Re: [lcd4linux] Can Optrex/M50530 display module be used?
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From: Michael R. <re...@eu...> - 2003-12-01 19:25:39
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Hi Dag, > I have taken a Optrex DMC-50461N display module from a scrapped > Lexmark printer. It contains a 4x20 LCD on one side and on the other > the ICs: M50530-001FP, M50524FP, a Philips 1325956 and a few other > smaller components. It has a 5-pin connector and 6 soft plastic > buttons. There's a M50530 driver fo lcd4linux, which works fine. But as you only have 5 pins, I'm afraid one of the other chips is a microcontroller, which drives the M50530 and the buttons, and has something like a "serial" interface on the 5 Pins. > Questions: 1) Would it be possible to use the display with lcd4linux? I'm shure it would be possible, but one had to write a special driver for it. Following your Question 2, you don't have and data sheet. So this will be quite difficult, if not a "mission impossible". > 2) How would it connect? I do not have any specs at all of how the > module interfaces, so no data on what the pins mean, timing, etc.. The connection would depend on the protocol. If it's nearly standard serial, you could use a serial interface, and benefit from the ready-made serial implementation in the kernel. The other possibility would be a connection to the paralle port, wehre you can and have to control every single bit yourself. > 3) It this display generic enough to be used for other purposes than > status display for a Lexmark printer, or is it effectively "closed"? Hard to tell. Is the display working with the printer? You could use a voltmeter, an oscilloscope and/or a logic analyzer, and try to figure out what the pins are, and what protocol the use. > This is my 1st posting to the list, hope it is not too off-topic. It is definitely very on-topic! bye, Michael -- netWorks Vox: +43 316 698260 Michael Reinelt Fax: +43 316 692343 Geisslergasse 4 GSM: +43 676 3079941 A-8045 Graz, Austria e-mail: re...@eu... |