RPi 3 Pypilot control via GPIO push buttons

[CapnKernel]

I'm sorry for creating confusion.  Vince seems to have taken it from this schematic I posted:

  https://forum.openmarine.net/attachment.php?aid=1078

The pinout is correct for this (and only this) keypad, which has pin 3 as the common.

  https://www.ebay.com.au/itm/302783209954

If anyone else wants to use this keypad, pins are thus (assuming pin 7 is on the right, closest to the POWER button):

 Pin 1: AUTO
 Pin 2: MENU
 Pin 3: LEFT
 Pin 4: POWER
 Pin 5: COMMON
 Pin 6: RIGHT
 Pin 7: LED

the 6 pins on the keypad terminals go to the 5 keys and the first pin is ground, not the third one.

Vince, check out J5 here:

 https://pypilot.org/schematics/tinypilot.pdf

For a 5-key setup, here's how it connects to the RPi:

 https://pypilot.org/wiki/lib/exe/fetch.p...pinout.png

I found this post helpful:

  https://forum.openmarine.net/showthread....5#pid11325

The code in that post has since changed.  Here are the possible commands:

  https://github.com/pypilot/pypilot/blob/...age.py#L18

 AUTO, MENU, SMALL_PORT, SMALL_STARBOARD, SELECT, BIG_PORT, BIG_STARBOARD, TACK, NUDGE_PORT, NUDGE_STARBOARD

And the RPi GPIO numbers are here:

 https://github.com/pypilot/pypilot/blob/...pio.py#L34

  [17, 23, 27, 22, 18, 5, 6, 26]

Putting these together, with the J5 and RPi pin numbers:

FN_NAME         GPIO   RPi_PIN J5_PIN HW_KEY_NAMES
AUTO            GPIO17 11      2      AUTO
MENU            GPIO23 16      3      MENU
SMALL_PORT      GPIO27 13      4      UP
SMALL_STARBOARD GPIO22 5       5      DOWN
SELECT          GPIO18 12      6      SELECT, POWER

J5 pin 1 is the common, which is wired to GND (RPi pin 25) through a 2.4k resistor.

Other functions which can be added with additional keys (ie, not through J5):

FN_NAME         GPIO   RPi_PIN
BIG_PORT        GPIO5  29
BIG_STARBOARD   GPIO6  31
TACK            GPIO26 37

There are two other functions defined in the software, although I can't see how to activate them from hardware:

  NUDGE_PORT
  NUDGE_STARBOARD

The source says "these work from any page (even menu) to dodge":

  https://github.com/pypilot/pypilot/blob/...ge.py#L264

Hope this helps anyone wondering about key interfacing.