Hi! Am Sonntag, den 18.08.2019, 10:43 -0400 schrieb James Richters: > I just pushed it.
Sorry for the delayed reply. After comparing the exception stack trace you've sent (see below) and your code, the access violation happens at https://github.com/Zaaphod/pas-libusb/blob/Hack/src/libusboop.pas#L1330 . The code dereferences the parameter AEndpoint. Most probably it is however Nil, because the preceding FInterface.FindEndpoint(EP_IN) in https://github.com/Zaaphod/pas-libusb/blob/Hack/src/examples/mydevice.pas#L143 didn't find that endpoint. As I've written, TMyDevice is NOT a generic device! It is specific for EZ-USB chips. You really should create your own class descending from TLibUsbDevice (instead of TLibUsbDeviceWithFirmware). In your constructor, you have to get a reference to the HID interface of your device, e.g., by TLibUsbPseudoHIDInterface.Create(...) analogous to https://github.com/Zaaphod/pas-libusb/blob/Hack/src/examples/mydevice.pas#L141 . This internally also gets references to the necessary endpoints, therefore you most probably don't need manual FInterface.FindEndpoint() (like TMyDevice). Please see snapi.pas, which I've sent you on 2019-08-10. This does exactly that. I've sent this file specifically that you use it instead of mydevice.pas. Bye Hansi > > Could you please "git push" the source code to Github so that the > > line numbers match the output? At least in line 1330 of > > libusboop.pas there is no Create. Please ensure that the > > version on Github is the very same version where you executed the > > program and got the line numbers. > > Thanks > Hansi > > > Running "i:\programming\pas- > > libusb_test_dll\src\examples\testopendevic_vidpid2.exe " > > start > > 1 > > 2 > > a05472131 > > a10CEEB93 > > b > > c > > FALSE 8086 10CE A36D EB93 > > FALSE 8087 10CE 0AAA EB93 > > FALSE 0424 10CE 2734 EB93 > > FALSE 1D50 10CE 6015 EB93 > > FALSE 1B1C 10CE 0C15 EB93 > > TRUE 10CE 10CE EB93 EB93 > > FALSE 05E3 10CE 0610 EB93 > > FALSE 04E8 10CE 61F5 EB93 > > FALSE 1B1C 10CE 0C10 EB93 > > FALSE 0424 10CE 274C EB93 > > FALSE 047D 10CE 1020 EB93 > > FALSE 1B1C 10CE 1B4F EB93 > > FALSE 1A40 10CE 0101 EB93 > > FALSE 0C45 10CE 7403 EB93 > > FALSE 10C4 10CE EA60 EB93 > > d > > e > > N > > P > > L > > H1 > > I > > I2 > > Q > > R > > K > > M > > O1 > > An unhandled exception occurred at $000000010002D0BB: > > EAccessViolation: Access violation > > $000000010002D0BB CREATE, line 1330 of libusboop.pas > > $000000010002B3AB > > $0000000100001942 main, line 75 of ../../pas- > > libusb_test_dll/src/examples/testopendevic_vidpid2.pas > > $0000000100001AF6 main, line 96 of ../../pas- > > libusb_test_dll/src/examples/testopendevic_vidpid2.pas > > $0000000100010040 > > $00000001000017F0 > > $00007FFB66D07E94 > > $00007FFB675FA251 > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
