Lpc2000

pitstock_kiwi wrote:
> While Brendan and Jaya have been furiously writing emails I have been 
> working on my LPC2148 ADC code. Its taken me a while but I now have 
> it clocking out the ADC at a rate of 520 K samples per second. I am 
> over clocking the ADC a little at 5 Mhz but my noise is well within 
> my required spec. I didn't think it was possible as I always hit 
> about 320 K or so at best. My 512 pixel camera is now doing over 500 
> frame captures per second :)

Just curious because I'm working on something similar...

How are you triggering the ADC?
ADC burst mode looks a bit awkward because with (for example) 8-bit
resolution, the ADC takes a sample every 9 ADC clocks, which makes
it hard to get a nice round sampling rate.
I tried to synchronise the ADC to a timer. This works and I make
almost any sample rate I want, but it only works when the trigger
signal is sent out to a pin.

How are you storing the ADC data?
Just a tight loop polling the ADC? or a FIQ? something else?

Thanks in advance,
Bertrik