Am 19.05.2017 14:53 schrieb "Lukasz Sokol" <el.es...@gmail.com>: > > On 19/05/17 13:33, Sven Barth via fpc-pascal wrote: > > >>> You don't have to build a 32-bit FPC because an official > >>> released installer exists. So this is no problem at all. But > >>> seeing as pretty much everything is moving (or already has moved) > >>> to 64-bit, why bother with 32-bit these days. [referring to > >>> desktop and server applications - not embedded devices] > >>> > >> > >> Is there a way for native 64bit application to load a 32bit > >> library, that then can talk to a 32bit USB driver ? (on Windows) > > > > Drivers (at least kernel mode drivers) must be 64-bit on 64-bit > > Windows (and also basically every other system I'm aware of). However > > it's perfectly possible to talk with a 64-bit driver from a 32-bit > > application. And no, you can't load a 32-library from a 64-bit > > process. > > This one is not a kernel-mode (at least so I think because the same > installation succeeds both on 32bit XPSP3, and in recent Win10 64bit)... > > (it's the old old Microchip MCHPFUSB driver used e.g. with PIC18F4550, driver version 1.3; > it's probably not as much a 'driver' as a way to register the PID and VID with the system, > more or less; but the library interfacing it, is 32bit only)
>From what I can see from their site version 1.3 is the first that supports 64-bit and it indeed includes a 64-bit driver (and a 32-bit one as well). Also if I understand that correctly the source and API information to access the driver is provided as well, so you could either compile the library for 64-bit or port it to FPC to solve this. Regards, Sven
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