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'[SX] Noob sx interface and capabilities questions '
2005\08\08@184158 by jgjonolan/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, jgjonola wrote:

Hello, I have been playing with the BS/2 for awhile and find it just great.  I come from a c++ with windows background, and learning to program the bs2 has been so much fun.  I would like to start learning the sx now for cost reasons.  I have a little pet project that i have been wanting to start, but before I do, I would like some startup info. I have ordered the sx tech toolkit plus, and cant wait to get started.  Here is what i want to eventually do (I have already done this on a pc, but making it work without the pc seems a bit complicated).  I would like to build a time clock.  It would have to interface to these devices:

A serial barcode scanner (from metrologic)

an lcd.


a serial to lan interface (so i can communicate with a pc based server program)

a speaker (just for beeps)

a keypad

a realtime clock chip

Basically, i would need to monitor the scanner for data being sent, monitor the keypad for data.  When data is detected from the scanner, i would store that until the computer sends it a command to "give me all of the stored data".  I would also need to be able to set the clock, accept input from the keyboard (for special codes before a punch), and it would have to be battery backed up so that it wouldn't lose stored 'punches' in the event of a power outage.  

So, do you think a noob can work his way through this?  (I think that i could get it all working on a BS/2 right now, but i dont think i would have enough pins to get the job done.)   I think that the hardest part will be getting the serial to lan interface working.  I'm thinking lantronix, but i have seen posts about getting it to work with the bs2, but i have not seen any with the sx.


I have a pretty good grasp on electronics, as well as basic and a little asm, along with some playing around with the basic stamp.  This is nothing I am really interested in selling, more of just a "I wonder if I can do it" thing.  I find that I learn the best when I just jump in and get started, so here goes nothin!


Thanks for any suggestions!  You guys are the best!


John Gjonola
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2005\08\08@195346 by Jon Williamsn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Jon Williams wrote:

Sure you can do it; it's like eating an elephant: one bite (byte) at a time.  Your BS2 skills will certainly serve you if you choose to start with SX/B.  Since you're running on an SX you could actually synthesize the RTC.

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2005\08\08@200252 by beann/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

The most elegent way would be for it all to be interrupt driven. And as Jon say's you could even create a "software" RTC (as long an the SX is power all the time).
Very interesting project...Keep us informed.
Bean.

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2005\08\08@232237 by jgjonolan/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, jgjonola wrote:

Thanks for the support guys...  I will keep you posted. (And will probably have some questions also)
John Gjonola
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