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-rw-r--r--k290_fnkeyctl.cpp58
1 files changed, 58 insertions, 0 deletions
diff --git a/k290_fnkeyctl.cpp b/k290_fnkeyctl.cpp
new file mode 100644
index 00000000000..c6d010a9c03
--- /dev/null
+++ b/k290_fnkeyctl.cpp
@@ -0,0 +1,58 @@
+#include <iostream>
+#include <memory>
+#include <functional>
+#include <cstring>
+
+#include <libusb-1.0/libusb.h>
+
+#define USB_VENDOR_LOGITECH 0x046d
+#define USB_PRODUCT_K290 0xc31f
+
+std::shared_ptr<libusb_device_handle> getK290Device(std::shared_ptr<libusb_context>& context) {
+ libusb_device** rawList = nullptr;
+ auto numDevices = libusb_get_device_list(context.get(), &rawList);
+ if (0 == numDevices) {
+ return nullptr;
+ }
+ std::shared_ptr<libusb_device*> deviceList(rawList, std::bind(libusb_free_device_list, std::placeholders::_1, 1));
+ for (int i = 0; i < numDevices; i++) {
+ libusb_device_descriptor deviceDescriptor;
+ auto device = deviceList.get()[i];
+ libusb_get_device_descriptor(device, &deviceDescriptor); // always successful since 1.0.16
+ if (USB_VENDOR_LOGITECH == deviceDescriptor.idVendor && USB_PRODUCT_K290 == deviceDescriptor.idProduct) {
+ libusb_device_handle* rawHandle = nullptr;
+ auto err = libusb_open(device, &rawHandle);
+ if (0 == err) {
+ return std::move(std::shared_ptr<libusb_device_handle>(rawHandle, libusb_close));
+ } else {
+ std::cerr << "Could not open device: " << libusb_error_name(err) << std::endl;
+ }
+ }
+ }
+ return nullptr;
+}
+
+int main(int argc, const char* const argv[]) {
+ libusb_context* rawUsbCtx = nullptr;
+ auto err = libusb_init(&rawUsbCtx);
+ if (0 != err) {
+ std::cerr << "Could not initialize libusb: " << libusb_error_name(err) << std::endl;
+ return 1;
+ }
+ std::shared_ptr<libusb_context> usbContext(rawUsbCtx, libusb_exit);
+ std::shared_ptr<libusb_device_handle> device(getK290Device(usbContext));
+ if (nullptr == device) {
+ std::cerr << "Logitech K290 not found on this system" << std::endl;
+ return 2;
+ }
+ bool reset = ((argc > 1) && ((0 == strcmp(argv[1], "-r")) || 0 == strcmp(argv[1], "--reset")));
+ err = libusb_control_transfer(device.get(), 0x40, 2, 0x001a, reset ? 0 : 1, nullptr, 0, 1000);
+ if (0 == err) {
+ std::cout << "Successfully set function keys to " << (reset ? "default" : "regular") << " behaviour" << std::endl;
+ return 0;
+ } else {
+ std::cerr << "Something went wrong when sending the command: " << libusb_error_name(err) << std::endl;
+ return 1;
+ }
+}
+