[time-nuts] FE-.5680A trimming resolution
xnews2 at luna.kyed.com
Tue Jan 31 15:23:57 EST 2012
On Tue, 31 Jan 2012 20:43:35 +0100, Attila Kinali wrote:
> My current progress is that the uC i wanted to use does not do what i
> want. Can anyone recommend a uC with 32bit timers and IEEE 1588 support?
Some of the ST's supports IEEE-1588
I'd suggest a $20 STM32-F4-Discovery (Digikey etc)
And a Phy (The mac is in the F4) $10
Some www-sw is here (German use google translate)
The F4 even supports "Single precision" Floats in HW ,
and has both ADC & DAC (with the ADC/DAC vref pin on external pin).
1G flash , 192k Ram , and it runs 168Mhz.
I think there is 2 x 32bit timers (Fclock/2) , and a fair amount of 16bit
It comes with build in debugger (proprietarary) , but the debug protocol
has been reversed ... (see texane project) , and afaik it is now suported
in openocd. So arm-gcc & arm-gdb can be used (ie codesourcery).
ST suggests Atollic as "gcc" toolchain , but that's imho "handicapped" in
the free version.
I have earlier suggested the F4-Discovery , as a "Tnut" GPSDO/OCXO/RBXO
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