In other STM32 news ...
Richard is doing some fine work on a cmake build system for
codec2-dev/stm32.
Down the track (sooner if I can get some help) I'd like to add a series
of unit tests for the new modems and Codec 2/FreeDV modes to assist in
porting and to verify the performance is identical to other platforms.
Cheers,
David
On 07/06/18 06:42, Danilo Beuche wrote:
Hi David,
On 06.06.2018 22:53, David Rowe wrote:
Hi Danilo,
I'm surprised that (especially) the tx is too slow for that class of
CPU. The modem (especially the modulator) is quite simple in terms of
CPU compared to the early parallel tone modems, e.g. for FreeDV 1600.
On a x86 I get similar CPU load for 1600 and 700D - and 700D has
powerful FEC.
Do you ave any profiling information you can share?
No, not yet. Right now I am running with data cache disabled, that may
slow down things a lot (Not sure about the impact of an disabled data
cache to be honest). Well, I'll try to look into this, but it might
take a while to get down to the root cause. It may also be caused by the
very long processing time due to the 160ms frames (vs. 20ms frames for
FreeDV 1600). I did not mention this, but the UHSDR firmware crashes
quite soon after starting TX for 700D (which it does not do for any
other mode), this is clearly a sign for a serious issue ;-)
But before this I can hear at least some frames coming with some silence
in between.
73
Danilo
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