Hi, @Glen: why is 216 Mhz BS? The UHSDR UI runs happily with 216 Mhz. Would be interested to learn about your experiences.
The F7 indeed is roughly twice as fast due to extensive caches (which also requires more careful handling of certain operations) and a much better FPU. The 100LQFP case pins between STM32F405 and STM32F765 are bascially on one side shifted by one pin but this not a big deal since you have to design a new board anyways. But if you want fast, really fast, go with the STM32H7: basically same porting effort and either uses much less power (at same frequency) or runs much faster (at 400 Mhz). H7 and F7 have roughly the same pinout. Danilo On 04.02.2019 22:37, glen english wrote: > Hi Richard > > if you dont think you can stomach the changes of the RT1020 , suggest > an F7. Choose the one with lots of cache. > > there are 4k, 8k and 16k cache parts. Use the 16k cache parts. > > unless necessary, be sure that your compiler treats doubles as floats. > > they are mostly pin compatible. the FPU is abotu 2x the speed of the F4. > > My advice is dont use an F4, unless you are building a consumer > product that is down to the dollar... > > F7s really only run at the same speed as F4s. (168 MHz) .The 216 MHz > is BS really. > > -glen > > > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
