README

fpc_linux_events

I converted some files from the Linux Kernel to use with Free Pascal to read input events in Linux. This is the very first release, note that:

• tested on Raspberry PI with fpc 3.0.4 and Kernel 4.14.98;
• I used Delphi mode because I know it, not tested in fpc mode;
• there are some strange coditional define because I write in the Delphi IDE, do a compile to check syntax then copy to the Raspberry PI and compile with fpc :-) ;
• a lot of strings has to be added to test program

Tested with a rotary encoder, in config.txt: dtoverlay=rotary-encoder,pin_a=17,pin_b=27,steps-per-period=2,relative_axis

Also tested with a button, in config.txt: dtoverlay=gpio-key,gpio=23,active_low,gpio_pull=up,label=P3,keycode=4

Files:

• IOCtl.pas conversion from ioctl.h, added e function to build ioctl codes at runtime because Pascal have not the flexibility of C preprocessor.
• input.pas conversion from input.h.
• inputeventcodes.pas conversion from input-event-codes.h.
• InputUtils.pas some simple helper functions.
• event.dpr a conversion from evtest.c, a simple program to show present event handlers and to check it.
• rotary.pas a class to read rotary encoder, uses threads.
• rotarytest.lpr a small program to test the TRotary class.

#Commit 2 - 2019.04.27

• Added a class to use Rotary Encoders and a test program.

Commmit 1 - 2014.04.25

• Initial release.