On 2/5/2020 4:25 PM, Bruce Perens via Freetel-codec2 wrote:
Bill, before you go any farther oh, you should make a floating point benchmark. I don't believe the necessary performance is there.
I used to think that, but then Espressif released their ESP-DSP library. I ported my Bell 202 modem from Cortex-M4F using CMSIS-DSP to ESP32 running at 240MHz using ESP-DSP and see comparable performance per clock, and my actual modem is single-threaded and thus uses only one of the ESP32's two cores. It's conceivable if some additional latency is tolerable and the algorithm divisible, it could be split over the two cores. Espressif offers both "ANSI C" portable functions and ESP32-specific assembly functions - the latter are considerably faster and what I am using. Cheers, Dana K6JQ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
