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Looking for Programming specifications — Parallax Forums

Looking for Programming specifications

PaulHollandPaulHolland Posts: 4
edited 2005-10-14 06:50 in General Discussion
Hi, I am not able to find the programming specifications for the SX series. I would like to connect and FTDI chip to an SX48 and program or update the SX firmware from the PC etc.. I was reading the datasheet and it was telling that its possible to perform serial or parallel programming I would like to know all about parallel programming !. Who can help me out. regards, Paul.

Comments

  • Ken GraceyKen Gracey Posts: 7,401
    edited 2005-10-08 20:30
    Paul,

    How about this file:

    http://www.parallax.com/dl/docs/prod/sx/DeviceProgramming.pdf

    If this isn't what you're looking for then I'll keep searching because we have all relevant SX files at Parallax.

    Ken Gracey
    Parallax, Inc.
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-10-10 19:43
    If I remember correctly the parallel programming mode requires an external 12V supply (not sure, Acrobat doesn't work on this machine so I can't read pdfs). Anyways, why would you want to take a serial communication (USB) and convert it to parallel in order to program the SX, when you can get a small pin count (8 pin) microcontroller to convert one serial format to another?

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    ·1+1=10
  • John CoutureJohn Couture Posts: 370
    edited 2005-10-11 15:06
    Ken,

    Just out of curiosity, is that manual (SX Family Design Specidication, Rev B.0, 177+ pages) available online. Not that I need any of the information (most of it way over my head), just curious if I missed a URL somewhere. I guess what I'm asking for is do you have a web page listing all of the available resources at Parallax (manuals, datasheets, etc) without all of the "this is what is on sale this week" stuff? (grin) Ok, I'll settle for the sale announcements if you can put all the links on one page.

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    John J. Couture

    San Diego Miramar College
  • Ken GraceyKen Gracey Posts: 7,401
    edited 2005-10-11 18:21
    John,

    http://www.parallax.com/sx/downloads.asp·shows all of the SX downloads. Through November we'll be making lots of improvements to the SX downloads as we adapt them for Parallax's new role with the SX.

    Ken Gracey
    Parallax, Inc.
  • PaulHollandPaulHolland Posts: 4
    edited 2005-10-12 16:35
    Hi, I want to make the SX in-field programmable so that we can put the USB and SX chip in a USB connector and mold the whole thing in plastic. For this I need to be able to have a programming spec to see if I can do this with an SX. The SX will be doing AES 128 bits encryption and data processing at a 64 KBits/s datarate. Its possible since my AES 128 bits implementation is extremely fast on the SX. takes less than 100uS for 1 byte input data to encrypt.

    regards,

    Paul.
  • PJMontyPJMonty Posts: 983
    edited 2005-10-13 01:44
    Paul,

    Any chance you can share your SX AES encryption code?
      Thanks, PeterM
  • PaulHollandPaulHolland Posts: 4
    edited 2005-10-13 19:44
    Hi PeterM,

    I think you will have to buy an IP from my company, I can't share it just like that. The code can work in CBC and CFB mode. Other modes are possible on request. For your info: on an PIC 12F629 the code is taking about 450 Bytes of memory and about 9000 cycles. All is depending if you use the smallest or fastest version. We also have an CRC routine that take only 28 cycles to do 1 Byte smile.gif.. That is about 300 times faster than any other 16 Bits CRC CCITT in the market.

    regards,

    Paul.
  • PJMontyPJMonty Posts: 983
    edited 2005-10-14 06:50
    Paul,

    Too bad. Oh well...
      Thanks, PeterM
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