Hi Don and Richard, Raspberry Pi (and clones) hardware is so so cheap.
Today's PIC is a Pi Zero............ Pi Zero W (wireless) $35AU My Banana Pi (original) here will run the FreeDV app quite well just don't run the waterfall display, a $50 board. Thus, an app is needed without the GUI and use a GPIO input for PTT. Wire up an I2C AtoD and DtoA or two USB audio dongles. And it will be fully up-gradable in the future. Repeater ======== I'm interested in http://dmlinking.net/ for a split site full duplex repeater. Though my half-duplex one enables the transmitting site to hear their own audio (re-transmitted). In the experimental stage, quite handy. On Mon, 4 Feb 2019 10:24:53 -0800, Don wrote > I am currently working on getting the 700D mode to work with the SM1000. > It is not certain that this will be possible because of the memory > needed. > > Also Dave is looking at new compression modes with different > performance and bandwidths. > > I see the current firmware as best suited for experimenting and developing > on a desktop PC. To make a small, low cost embedded version one > would likely want to do a major re-write of the code. Lacking that, > I suggest that you look at processor versions that have a lot more > memory so that it will support future modes. The STM32F7 family > looks interesting. > > Don Reid - W7DMR > > On Mon, Feb 04, 2019 at 05:42:15PM +0000, 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 Alan Evil flourishes when good men do nothing. Consider the Christmas child. --------------------------------------------------------------------------- Alan Beard Unix Support Technician from 1984 to today 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS Emu Heights N.S.W. 2750 Routers, terminal servers, printers, terminals etc.. +61 2 47353013 (h) Support Programming, shell scripting, "C", assembler 0414 353013 (mobile) After uni, electronics tech _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
