In the app_rpt.c source there is mention of cop 31, Channel Selector for Parallel Programmed Xcvr and ppp16. Have asked several times on the list about this but never got a response. Any gurus out there have any info? BCD channel steering would certainly be a better solution than pulsing the up down selector. Ed W8VT On 6/10/2015 9:53 AM, Skyler F wrote:
Has anybody ever created a remote base with a radio like the SM120 16 channel commercial radio? Would it be possible to use the URI to specify the channel I want to go to, for example, hooking a GPIO pin to the "channel -" button and hooking another to the "channel +" button? So if I am on channel 1 and want to go to 7, the GPIO for "chan +" would have to pulse 6 times. That wouldn't be very reliable probably because there is no confirmation that you are actually on the right channel, but this is how I would do it:
When a channel change is requested, pulse 16 or more times on the "chan -" button to make sure it is on channel 1. Then count the + button up to the channel number you want to go to. That idea, however wouldn't work on the SM120 because going below channel 1 brings you back to 16.
Another idea I have is put one channel on a frequency reference (maybe those 150mhz re-broadcasts of radio stations?) and then find the channel you want based on that reference.
Another idea yet would be to use a few more GPIO pins to see which elements of the 7-segment displays are lit up and then make an estimate on which channel you currently are on.
Any other ideas?
73 Skyler kd0whb
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