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Patch - Joystick coef[] doesn't support dial with low number of posit…
…ions. Simon <simon@mungewell.org> I am working on joystick support for the SRW-S1 gaming wheel on Linux, this device has 3 dials with only a few positions each. At present SDL2 only fail to report the highest position value, due to the interger math used for coef[]'s. So with a 4 position switch I have input values (with evtest) -- Event: time 1358967246.173186, type 3 (EV_ABS), code 9 (ABS_GAS), value 2 Event: time 1358967246.173186, -------------- SYN_REPORT ------------ Event: time 1358967246.369150, type 3 (EV_ABS), code 9 (ABS_GAS), value 1 Event: time 1358967246.369150, -------------- SYN_REPORT ------------ Event: time 1358967246.930277, type 3 (EV_ABS), code 9 (ABS_GAS), value 0 Event: time 1358967246.930277, -------------- SYN_REPORT ------------ Event: time 1358967249.369832, type 3 (EV_ABS), code 9 (ABS_GAS), value 1 Event: time 1358967249.369832, -------------- SYN_REPORT ------------ Event: time 1358967249.514382, type 3 (EV_ABS), code 9 (ABS_GAS), value 2 Event: time 1358967249.514382, -------------- SYN_REPORT ------------ Event: time 1358967249.626189, type 3 (EV_ABS), code 9 (ABS_GAS), value 3 Event: time 1358967249.626189, -------------- SYN_REPORT ------------ -- Testjoystick reports -- Joystick has 6 axes, 1 hats, 0 balls, and 17 buttons Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: -32768 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 0 Joystick 0 axis 5 value: -32768 -- The attached patch 'shifts' the coef[], so that 1/2 values can be computed/seen and allows testjoystick to report correctly. -- Joystick has 6 axes, 1 hats, 0 balls, and 17 buttons Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: 32767 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: -32768 Joystick 0 axis 5 value: -10923 Joystick 0 axis 5 value: 10922 Joystick 0 axis 5 value: 32767 -- Cheers, Simon
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