Created a controller for the keyboard

src/controllers/DasKeyboard.rs

@@ -0,0 +1,58 @@
+/*****************************************************************************
+ * Module: DasKeyboard
+ * Created On: Fri 07 May 2021 10:17:24 PM CEST
+ * Last Modified: Fri 07 May 2021 11:28:01 PM CEST
+ *
+ * Driver for DasKeyboard keyboards light
+ * Jali <jali@orca-central.de>
+ *****************************************************************************/
+
+use std::ffi::{CStr, CString};
+use hidapi::{DeviceInfo, HidApi, HidError, HidResult};
+
+/** Driver for DasKeyboard RGB keyboards
+ *  lighting controller
+ */
+pub struct DasKeyboardController {
+    dev: DeviceInfo,
+    location: CString,
+    use_traditional_send_data: bool,
+    version: String,
+}
+
+/** Implementation of the controller. */
+impl DasKeyboardController {
+    /**
+     * Creates a new instance of ```DasKeyboardController```, which is
+     * bound to a currently connected device.
+     *
+     * # Arguments
+     *
+     * * `vendor_id` - The unique vendor/manufactorer id of the device
+     * * `product_id` - The unique product id of the device.
+     */
+    pub fn new(vendor_id: u16, product_id: u16) -> HidResult<DasKeyboardController> {
+        match HidApi::new() {
+            Ok(api) => {
+                let device = api.device_list()
+                    .find(d => d.vendor_id() == vendor_id && d.product_id() == product_id);
+
+                match device {                    
+                    Some(d) => {
+                        let c = DasKeyboardController {
+                            dev      = d,
+                            location = d.path()
+                        };
+                        Ok(c)
+                    },
+                    None => {
+                        Err(HidApiError("Could not open device"))
+                    }
+                }
+            },
+            Err(e) => {
+                e
+            }
+        }
+    }
+}