Lpc2000

Thanks a lot for the info.
Stephen , I am interested in the board you mentioned (USB, CPLD & LPC). I
was wondering if you have the schematics available so that I can get a
closer look.
Thanks,
m.

________________________________________
From: Stephen Pelc [mailto:stephen@...] 
Sent: Monday, May 03, 2004 11:36 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] In-Application Programming

> From: "Milos Prokic" <mproki@...l.ca>
> Subject: In-Application Programming
> I'm interested in trying the in-application programming feature
> of the LPC2100. I was wondering if anyone has tried it. Any
> pointers regarding the issue, maybe even some sample code will be
> of great help.
Everything we needed for the LPC2106 is in the datasheet and App 
Note AN10256. Our Forth Stamp board (available "Real Soon Now": 
LPC2106, USB and user programmable CPLD) reprograms itself very 
reliably over USB.

We copy a small program (about 3kb) to RAM, execute it from RAM 
and then reboot the system using the watchdog.

Our interface to the IAP routines from ARM mode is this:

5 cells buffer: IAPcmd      \ -- addr ; max 5 cells
\ *G Command input buffer for IAP routines.
3 cells buffer: IAPres      \ -- addr ; max 3 cells
\ *G Result output buffer from IAP routines.

l: ^IAP
  IAPentry 1 or ,                  \ entry address, Thumb 
mode

code IAP      \ *cmd *res --
\ *G The primitive to call the IAP routines.
  str      link, [ rsp, # -4 ] !
  ldr   r0, [ psp ], # 4            \ R0 = *cmd
  mov   r1, tos                        \ R1 = *res
  ldr   r5, ^IAP                  \ get entry address
  stmfd rsp ! { r2-r12 }
  mov   link, pc                  \ link set to after BX
  bx    r5
  ldmfd rsp ! { r2-r12 }
  ldr   tos, [ psp ], # 4            \ restore TOS
  ldr   pc, [ rsp ], # 4            \ return
end-code

Stephen

--
Stephen Pelc, stephen@...
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 23 80 631441, fax: +44 23 80 339691
web: http://www.mpeltd.demon.co.uk - free VFX Forth downloads


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