Unfortunately, this fails to run with the latest Golang:

panic: runtime error: cgo argument has Go pointer to Go pointer

goroutine 1 [running]:
panic(0x4100900, 0xc82005c270)
/usr/local/Cellar/go/1.6/libexec/src/runtime/panic.go:464 +0x3e6
github.com/GeertJohan/cgo%2ewchar.convertWcharStringToGoString(0xc82007c100, 0xa, 0x10, 0x0, 0x0, 0x0, 0x0)
/Users/weingart/src/github.com/GeertJohan/cgo.wchar/convert.go:150 +0x521
github.com/GeertJohan/cgo%2ewchar.WcharStringPtrToGoString(0x4309800, 0x0, 0x0, 0x0, 0x0)
/Users/weingart/src/github.com/GeertJohan/cgo.wchar/wchar.go:141 +0x91
github.com/GeertJohan/go%2ehid.Enumerate(0xc800000000, 0x0, 0x0, 0x0, 0x0, 0x0)
/Users/weingart/src/github.com/GeertJohan/go.hid/hid.go:211 +0x3e6

sadface

hidapi is a cross-platform library, the included version is only for linux/hidraw. By doing so, you limit unnecessarily the scope of your library.

Download and compile hidapi separately, then compile/install your project.

This is a fantastic Go library for HID devices! Finally, after 6+ years of sitting on some unique USB HID devices, I saw this repo and sniffed out the commands for my device (though there are other types and models out there).

As I started to use go.hid, I quickly ran up against the limitations of the hidapi library! In particular:

http://stackoverflow.com/questions/17706853/using-hidapi-how-can-you-query-the-raw-report-descriptor

HIDAPI does not provide functions for getting or parsing the report descriptor. Since HIDAPI is 
for talking to a custom devices, these devices will likely contain all or mostly vendor-defined 
report items anyway.

That's a bummer as I was attempting to query for and then enumerate over all report IDs and their descriptors as that's what my device uses.

So I am back to investigating into the libusb C++ cross-platform project.

https://github.com/libusb/libusb

Please ignore this issue, as it was on the device's side, anyway that seemed totally impossible that the bug could be on go.hid's side.

Conversion fails for some reason on raspberry pi (running linux arm and using libusb). Errors are shown below. These changes tested on linux (arm) and osx.

./go.hid/hid.go:597: cannot convert ws.Pointer() (type *wchar.Wchar) to type *C.wchar_t ./go.hid/hid.go:624: cannot convert ws.Pointer() (type *wchar.Wchar) to type *C.wchar_t ./go.hid/hid.go:651: cannot convert ws.Pointer() (type *wchar.Wchar) to type *C.wchar_t ./go.hid/hid.go:679: cannot convert ws.Pointer() (type *wchar.Wchar) to type *C.wchar_t

For instance:

FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF

(16x)

this raises an error from libiconv: illegal byte sequence.