Hello,
my goal was to get Codec2 (encoding and decoding) working on STM32F446
running on 180MHz. So, I created a new project for Nucleo with F446RE and
added Codec2 libraries to it. I compile with GCC (using STM32CubeIDE -
based on Eclipse).
I have GCC optimization turned off and encoding and
Hi Jan
Just adding to the other two very good replies
My experience with codec2 with STM32F4/F7 At O0, the performance may be
down to 50% of -O2, and also, with O0, its likely the compiler is not
exploiting any hardware speedups as with GCC there are some (invisible)
ties between -O level,
Hi Jan,
We run Codec 2 half duplex (along with a bunch of other modem and FEC
code) on a 180 MHz stm32 and it works just fine in real time. So your
expectations are quite realistic.
The build system we use for the stm32 is in
codec2/stm32/CMakeLists.txt, including C compiler flags (looks like
Hi Jan,
In the Codec2 library, there are some flags that are turned on in order to
get it to function on the SM1000 (which also uses a STM32F4 series MCU).
You can find out more at
https://github.com/drowe67/codec2/blob/main/stm32/CMakeLists.txt but the
important ones are as follows:
Hi Glen,
I seem to remember that there was a previous project that implemented it on
a FPGA, but I can't recall specifics at the moment. FWIW, on ezDV (ESP32-S3
but should perform similarly to the STM32F4 on the SM1000), 700D TX took
something like ~90ms per 160ms frame while RX using real-only
Hi Mooneer
I am preparing to implement FreeDV on an FPGA.
Is there a location in the repo somewhere, or does anyone have ,
anecdotally a feeling of, the major workloads / major consumers of
processor time on the STM32 FreeDV port.
regards
___
Hi Mooneer
thanks for the comments. The FDIV on the ESP32-S3 is very slow I think
80 cycles, but of course one should always use RECIPS and a MUL.
Integer div is a couple of cycles IIRC.
I'll start and see what jams it all up .
regards,
On 21/11/2023 4:01 pm, Mooneer Salem wrote:
Hi
