Lpc2000

Chris, 

> I guess you missed the point.

Well, let's work through it shall we.

> The programming time is 
> limited by the internal operation of the LPC CPU.

Sure.  I understand that.

> Erasing sectors is time controlled by the CPU.  The jtag link has 
> nothing to do with this.  Those time delays are the same for 
> any programmer.  Just try doing some IAP yourself from your 
> own internal code and you will understand real quick.  You 
> can't do it any faster even from inside the CPU.

I'm sorry if I'm a little thick here.  You'll need to help me with the
mathematics.

Here's a little dump of what CrossWorks does when downloading using a
CrossConnect:

Downloading Loader to USB CrossConnect for ARM
Programming 3.6 KB at 0x40000000
Programming completed in 141 ms -- 26,808 bytes/sec
Downloading keil_mcb2140.elf to USB CrossConnect for ARM
Erasing completed in 2.1 s -- 23,499 bytes/sec
Programming 47.4 KB at 0x0
Programming completed in 1.5 s -- 32,575 bytes/sec
Verifying keil_mcb2140.elf on USB CrossConnect for ARM
Verifying completed in 375 ms -- 130,216 bytes/sec

I downloaded 3.6K to RAM in 141ms, then I erased the LPC2k's flash in
2.1s, then I downloaded 47.5K to flash in 1.5s, and then I verified that
it had downloaded correctly in 375ms.

Total time from cold to debugging = 4.1s.

With a wiggler:

Downloading Loader to Macraigor Wiggler (20 Pin)
Programming 3.6 KB  at 0x40000000
Programming completed in 312 ms --12,320 bytes/sec
Downloading keil_mcb2140.elf to Macraigor Wiggler (20 Pin)
Erasing completed in 2.0 s -- 24,078 bytes/sec
Programming 47.4 KB at 0x0
Programming completed in 2.9 s -- 16,859 bytes/sec
Verifying keil_mcb2140.elf on Macraigor Wiggler (20 Pin)
Verifying completed in 390 ms --126,317 bytes/sec

So, I downloaded 3.6K to RAM in 312ms, then I erased the LPC2k's flash
in 2.0s, then I downloaded 47.5K to flash in 2.9s, and then I verified
that it had downloaded correctly in 390ms.

Total time from cold to debugging = 5.6s.

You said:

"The download to the Flash/RAM only takes a couple seconds or less. But
the programming of the flash takes about 6 seconds.  That is due to the
internal speed..."

Yes, so eight seconds for 48K to download and program.  That compares to
5.6s to download and program on the wiggler and 4.1s on the
CrossConnect.

So, where am I making my mistake, and why is the JTAGjet so much better?

-- Paul.