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AnswerRe: access to devices برنامه نویسی برای ساعت حضور و غیاب Pin
PecuniousPete7-Dec-12 22:51
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GeneralRe: access to devices برنامه نویسی برای ساعت حضور و غیاب Pin
مهندس صابر بهلولی 31767188-Dec-12 5:02
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GeneralRe: access to devices برنامه نویسی برای ساعت حضور و غیاب Pin
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QuestionOne monitor stays blank. Pin
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Jason Gleim3-Dec-12 11:35
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I've seen interfaces to do from a PC to an LCD but I haven't seen anyone go from from an LCD to a PC. There are a number of practical problems you would have to overcome.

Rather than trying to do something after the LCD controller chip, you might be better off picking off the the signal between the micro-controller and the LCD controller chip. The interface will be simpler. Between the central micro and the LCD controller the interface would likely be 7 to 12 pins depending on if they implemented half-word or full-word interfacing. If you can identify the data pins (Usually D0 thru D3 or D7) and the clock pin, you could probably program you own micro-controller to emulate the LCD control chip (and hence the whole display). Starting with the pin-out on the LCD control chip would be a good place to begin. (Actually, the manual on that chip would probably be required to have half a shot at making this work) However, you'll need to break out a logic analyzer and you'll probably need to write your own emulator using something like an Atmel AVR micro. Those chips would work well because they have a USART that you can connect back to a PC to pass in the display data as a serial data stream. Then you would just need to craft something on the PC to receive that data stream and display it in a 'virtual lcd' on screen.
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