you only need a nice big binary counter for the 1pps input correction , IE perhaps 24 flip flops is nice...and the ability to read this counter from the STM32- the STM32 can do the rest of the calcs, filtering, tables etc .
If there is a spare input pin on the STM32 that can drive one of the 16 bit or 32 bit counters even better. (no need for gate array) (counter run from internal STM32 clock which is run from the mater oscillator and gates against the pps) Currently it is costing me about $15 to put a GPS chip into my products. (Q100 pcs) On 9/02/2015 12:52 PM, Bruce Perens wrote: > On 02/08/2015 05:24 PM, Greg Troxel wrote: >> the Elecraft KX3 has a >> software-based TCXO that you calibrate yourself by running it through a >> wide range (fridge/freezer to hair dryer) while listening to a TCXO >> that's not having temperature swings. That results in good performance >> on twitchy digital modes, and may be a good tradeoff for your device. > We may have to do something like that for the ultra-low-bandwidth modes. > We have enough gate-array space to do it in hardware if necessary. > > Thanks > > Bruce > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming. The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > -- - Glen English RF Communications and Electronics Engineer CORTEX RF & Pacific Media Technologies Pty Ltd ABN 40 075 532 008 PO Box 5231 Lyneham ACT 2602, Australia. au mobile : +61 (0)418 975077 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
