[J-core] Pondering j-core kickstarter ideas.

Rob Landley rob at landley.net
Tue Apr 26 19:35:27 EDT 2016

On 04/26/2016 06:22 PM, Christopher Friedt wrote:
> On Tue, Apr 26, 2016 at 7:00 PM, Rob Landley <rob at landley.net> wrote:
>> No I am talking about a potential asic, I think I didn't understand
>> _your_ question. On-chip clocks and timers to do... what? (High accuracy
>> measurements?)
> Well, that's one use, of course (e.g. cycle or performance counter).
> One other example that immediately comes to mind is the systick on
> cortex-m. Another example would be periodic timers (countdown timers)
> that fire interrupts. On the last stm32 cortex-m device I was playing
> with, there were something insane like 8 periodic timers!
>> What I was trying to explain is that I don't know how to add more
>> on-chip clocks and timers in VHDL, because it's the "how do I add a
> It's pretty simple - for the most part it's just a matter of
> downsampling the clock signal from the high speed crystal. Usually
> those clock signals are programmable with a ratio in order to allow
> for a number of different crystal frequencies and downscaling ratios.

Ok, you're not saying more timing crystals, you're saying more outputs
from the crystal we've got.

Yeah, that should be fairly easily doable...


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