Analog left/right dead?

[dlanor]

(09-20-2013 03:12 PM)Xhosant Wrote:  On another, probably unrelated note, PPSSPP ignores all input from the gamepad in any usb slot other than the first it was used in. Driver again receives input. No reason to bother with that yet, though, just mentioning this as another possible clue.

As I see it this is not a PPSSPP bug, but a normal dependency on how your system software identifies USB devices.

I'm not sure what OS your equipment is using (or even if it is a PC, phone or tablet), but in many of them the identification of a device is always tied to whatever port it was connected to.

For example:
If you connect the same USB memory stick to different ports of a Windows PC at different times, the Windows registry will then contain separate device identification entries for each USB port you used that device with. High level OS routines will still be able to identify the drive using other criteria (internal ID codes and partition data etc), but the low-level identification differs for each port. (With additional differences if you sometimes use a hub.)

Like I said, high level filesystem access routines can mostly disregard those differences for storage devices, but low level I/O controller routines such as used for gamepads can not easily do so.

I'm pretty sure you can still make PPSSPP work with your gamepad regardless of which USB port you connect it to (works for me), but you will then have to reconfigure the controller usage each time you switch ports, and that's just not worth the trouble. It's better to just decide on a port to use consistently.

Just for completion I should add that it probably would be possible to recode some of the PPSSPP routines so as to identify USB gamepads differently, making it less dependent on the port used for identification. But that coding would have to be different for each platform PPSSPP is to be built for, so it could be a lot of work, and personally I'd rather have the developers focus their attention on real emulation issues than something like this.

Best regards: dlanor