59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package usb
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// #cgo LDFLAGS: -lusb-1.0
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// #include <libusb-1.0/libusb.h>
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import "C"
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type Descriptor struct {
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// Bus information
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Bus uint8 // The bus on which the device was detected
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Address uint8 // The address of the device on the bus
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// Version information
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Spec BCD // USB Specification Release Number
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Device BCD // The device version
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// Product information
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Vendor ID // The Vendor identifer
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Product ID // The Product identifier
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// Protocol information
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Class uint8 // The class of this device
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SubClass uint8 // The sub-class (within the class) of this device
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Protocol uint8 // The protocol (within the sub-class) of this device
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// Configuration information
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Configs []ConfigInfo
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}
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func newDescriptor(dev *C.libusb_device) (*Descriptor, error) {
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var desc C.struct_libusb_device_descriptor
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if errno := C.libusb_get_device_descriptor(dev, &desc); errno < 0 {
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return nil, usbError(errno)
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}
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// Enumerate configurations
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var cfgs []ConfigInfo
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for i := 0; i < int(desc.bNumConfigurations); i++ {
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var cfg *C.struct_libusb_config_descriptor
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if errno := C.libusb_get_config_descriptor(dev, C.uint8_t(i), &cfg); errno < 0 {
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return nil, usbError(errno)
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}
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cfgs = append(cfgs, newConfig(cfg))
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C.libusb_free_config_descriptor(cfg)
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}
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return &Descriptor{
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Bus: uint8(C.libusb_get_bus_number(dev)),
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Address: uint8(C.libusb_get_device_address(dev)),
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Spec: BCD(desc.bcdUSB),
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Device: BCD(desc.bcdDevice),
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Vendor: ID(desc.idVendor),
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Product: ID(desc.idProduct),
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Class: uint8(desc.bDeviceClass),
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SubClass: uint8(desc.bDeviceSubClass),
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Protocol: uint8(desc.bDeviceProtocol),
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Configs: cfgs,
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}, nil
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}
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