Lpc2000

Sounds like alot of time to work with. Thanks for the
stats. Well, I'm just working on a component that
takes in some hex code (from a file) and flash
programs a specific sector, somewhat like the philips
flash utility. 

I thought about looking thru the IAP on-chip code but
honestly 8kb's of assembly (7fffe000-80000000) is a
handful to look at.

I've been browsing some arm libraries for IAP source
code routines and found some useful C routines but not
any yet that has the hex file read capability. 


--- Peter Jakacki <peterjak@...> wrote:
> Leighton Rowe wrote:
> 
> > I'm looking for routines that enables my lpc2129
> to safely read
> > a .hex data file through the serial port into
> temporary RAM. Any
> > ideas or code examples?
> >
> > Although the LPCs operate at high frequencies, I'm
> a bit concerened
> > about just sending hex data just like an ordinary
> ASCII string
> > because of possible problems which can cause data
> loss...for
> > example, reading 1 ASCII value into memory too
> slowly between uart
> > (RDA) interrupts. What's the best way of avoiding
> this possible
> > situation?
> 
> Are you serious? I can dump .hex files down into an
> 8-pin PIC (no Uart) 
> running at 1Mhz effective rate and load (burn) this
> information into 
> another micro after every line. On any other 8-bit
> micro with a Uart and 
> some Ram I have absolutely no problems keeping up.
> Why would you think 
> that an LPC2129 can't keep up? Is it running at
> 32KHz? Does it disable 
> the interrupts for long periods? Are you pumping the
> hex file in at 10Mbaud?
> 
> Hex files always include a primitive checksum so you
> can always check 
> for integrity. Coms drivers should include some form
> of handshaking and 
> in most instances I prefer to use Xon/Xoff. If there
> was no way you 
> could handshake then I suggest that you just send
> the hex file a few 
> times, your s/w could just reject bad lines and so
> hopefully and 
> statiscally you should finally receive all hex data
> lines intact. 
> Tracking software could even signal whether it is
> happy or not at the 
> end of each file.
> 
> Really, the LPC2129 is more than capable of handling
> such simple tasks, 
> with or without a Uart FIFO. There should be no
> reason that the 2129 
> should miss any characters at all and no real reason
> that your s/w 
> should either. If you are in doubt then please
> inform us of the basis 
> for your concerns.
> 
> 
> --
> Peter Jakacki
> 
> 
> 
> 



	
		
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