Source selection buttons and rotary
MCP23017
Source select at startup
This requires the use of the MCP23017. When the MCP23017 (with address=0x00) is detected at startup, then the source selection by means of external input is enabled.
When source=systime and auto_start=1 (see configuration), then the source select is bypassed.
A rotary encoder can be used for selecting the source.
Two buttons <LEFT>/<RIGHT> can be used for selecting the source. Mapping on the rotary encoder behavior:
<LEFT>= CCW
<RIGHT>=CW
When the appropriate source is selected, then the <SELECT> button must be pressed.
Up to 8 led's can be used for showing the selection. The selection is also showed on all other supported displays.
The mapping for the buttons/rotary encoder is as following:
GPA0 -> Rotary encoder Pin A
GPA1 -> Rotary encoder Pin B
GPA2 -> Button <SELECT>
GPA3 -> Button <LEFT>
GPA4 -> Button <RIGHT>
GPA5 -> Button <START>
GPA6 -> Button <STOP>
GPA7 -> Button <RESUME>/<RESET>
The GPA pins are active low (connecting the other side of the button to ground).
The source select led's are mapped as following:
GPB0 -> led0 [source=ltc]
GPB1 -> led1 [source=artnet]
GPB2 -> led2 [source=midi]
GPB3 -> led3 [source=tcnet]
GPB4 -> led4 [source=internal]
GPB5 -> led5 [source=rtpmidi]
GPB6 -> led6 [source=systime]
GPB7 -> led7 - currently not used
The MCP23017 INTA must be connected to GPIO7 (pin 12).
Using the rotary for setting Start/Stop time
When in source select and Internal is selected then press <START> for changing the Start time and/or Frame rate. With pressing <START> there is toggle between editing the Start time and Frame rate.
With <LEFT>/<RIGHT> the cursor can be moved in the Start time. Then with the rotary encoder you can change the digit/tens.
Press <SELECT> for activating the selected/updated Start time and/or Frame rate.
Press <RESUME> for getting out of editing mode.
Skip Forward and Backward
After <STOP> is pressed or triggered, then with buttons <LEFT> or <RIGHT> the seconds are skipped as defined with skip_seconds=.