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geekhack Community => Keyboards => Topic started by: Pul5ar on Wed, 20 April 2016, 10:24:23

Title: Soarer's firmware question
Post by: Pul5ar on Wed, 20 April 2016, 10:24:23

I have created a matrix config for Soarer's firmware:

matrix
   scanrate 1
   debounce 5
   blocking 0

   sense         PB0      PB1      PB2      PB3
   strobe   PF0      NUM_LOCK   PAD_SLASH   PAD_ASTERIX   PAD_MINUS
   strobe   PF1      PAD_7      PAD_8      PAD_9      UNASSIGNED
   strobe   PF4      PAD_4      PAD_5      PAD_6      PAD_PLUS
   strobe   PF5      PAD_1      PAD_2      PAD_3      UNASSIGNED
   strobe   PF6      PAD_0      UNASSIGNED   PAD_PERIOD   PAD_ENTER
end

My question is which way round do the diodes go, or does it matter?
If they are in the wrong direction can I simply re-label the strobe rows to sense and change the sense to strobe. Like this:

matrix
   scanrate 1
   debounce 5
   blocking 0

   strobe         PB0      PB1      PB2      PB3
   sense   PF0      NUM_LOCK   PAD_SLASH   PAD_ASTERIX   PAD_MINUS
   sense   PF1      PAD_7      PAD_8      PAD_9      UNASSIGNED
   sense   PF4      PAD_4      PAD_5      PAD_6      PAD_PLUS
   sense   PF5      PAD_1      PAD_2      PAD_3      UNASSIGNED
   sense   PF6      PAD_0      UNASSIGNED   PAD_PERIOD   PAD_ENTER
end

I wouldn't want to have to desolder all the diodes.

Title: Re: Soarer's firmware question
Post by: suicidal_orange on Wed, 20 April 2016, 16:31:48

It's been a while since I played with Soarer's but as long as your diodes are consistent you can make it work using a combination of rotating the layout and changing the strobe_mode and sense_polarity settings (see the 'Controller docs' folder)

It's only a small board so I would just build it and then make it work, but if you want the config to look like the pad as it does in your post you could flash the Teensy(?) then connect one of the assigned row/column pairs using a diode - if it outputs the desired number that's the right way round, if not turn the diode round.  If it still doesn't output you may have a dead diode...

Title: Re: Soarer's firmware question
Post by: Pul5ar on Fri, 22 April 2016, 08:51:06

Awesome, thanks. Could you check my logic please.
If the defaults are strobe_mode 0 and sense_polarity 0, then the opposite of default would be strobe_mode 4, and sense_polarity 1?

strobe_mode
Various strobe modes can be selected, although it will be quite unusual to need anything other than the default, which is 0.
WARNING: exercise caution when using modes 1 or 5, since errors in the connections or lack of diodes can easily damage the Teensy!

Mode   Active   Inactive
0           low           pullup
1           low           high
2           low           float
3           float        high
4           pullup      low
5           high           low
6           float           low
7           high           float

sense_polarity
This setting should normally match the strobe mode, with 0 being used for strobe_modes 0 to 3, and 1 being used for strobe_modes 4 to 7.
Valid values are 0 (active low) or 1 (active high).
The default is 0.