Lpc2000

----- Original Message ----- 
  From: Richard Duits 
  To: lpc2000@yahoogroups.com 
  Sent: Thursday, August 18, 2005 1:15 AM
  Subject: Re: [lpc2000] RAM loading via JTAG


  When you switch the ARM7 into debug mode, all instructions and data are 
  read from the jtag interface. You can just upload a ldm instruction for 
  example with the data following the instruction and then use a stm 
  instruction to store it in sram. 

  ** Do you mean: should I send via JTAG binary code of LDM/STM instructions?

  Then you setup the registers to call 
  the IAP routine and set a breakpoint to the same address the LR is 
  pointing to. The ARM site has excelent documentation on this, so I 
  suggest you browse www.arm.com and lookup the information you need.
  ** OK, I'll try.


  A suggestion: use a FT2232 (see 
  http://www.ftdichip.com/FTProducts.htm#FT2232C) for the low level JTAG 
  stuff, they have a JTAG DLL for windows and good documentation the write 
  this yourself for other platforms. All you need is this single FT2232 
  and some passive components to make this work.

  ** JTAG is not a problem for me (I used FT2232 in universal PLD programmer/configurator IEEE1532 compatible). My idea is to prepare Windows software for simple Macraigor interface for fast programming LPC uCs. 
  Thanks for answer.
  Piotr

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