Hi Richard, Sounds like a fun project, and I hope you have fun with it. There was a similar project a few years ago. Search this mailing list around August 2016, [email protected].
To your questions: 1/ The eeprom was intended for state information but Stuart showed us how to store this in the internal flash. 2/ USB can be used for anything you like. The built in boot loader is useful for firmware upgrades, we've also used it to move speech samples to a Host PC while experimenting. Down the track I'd like to see a TTY type command line interface on it for setting up configuration like callsign text. Currently it's not used for anything while the SM1000 is running. I agree with Don's comments - go for a modern, but code compatible variant with more flash and RAM. Cheers, David On 05/02/19 04:12, Richard wrote: > Hi All, > > I hear this mailing list covers the SM1000 hardware implementation. > > I am thinking of (well, I've started) designing a "module" version > designed to plug into a rig. The idea being that if you're building a > radio you can include a small plug-in module on pin headers that adds > digital voice. Because it lives inside other equipment it can be smaller > and simpler than the SM1000, just keeping the core functionality without > the isolated interfaces, external enclosure, etc. Essentially it's a > stripped-down SM1000 in a smaller physical form factor. I've not got as > far as a draft placement but I am anticipating something on the order of > 50 mm square. > > Is anyone else interested in this? Any comments or suggestions? > > If no-one else wants it I will probably build a few for myself anyway. > Software is not my thing so unless there's a good reason otherwise I > expect it to run the standard SM1000 firmware. > > A couple of things I have not been able to work out, 1. what's the > not-fitted EEPROM intended for? and 2. what is the USB OTG used for? It > looks like device mode is used for updates but in what situation would > host mode be used? > > Richard > M1FJA > > > > > _______________________________________________ > 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
