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
+            }
+        }
+    }
+}

src/controllers/mod.rs

@@ -0,0 +1,10 @@
+/*
+ * Definition of module controllers
+ *
+ * Created On: Fri 07 May 2021 09:19:14 PM CEST
+ * Last Modified: Fri 07 May 2021 09:19:14 PM CEST
+ */
+
+mod DasKeyboard;
+pub use DasKeyboard::DasKeyboardController;
+

src/main.rs

@@ -1,77 +1,25 @@
 extern crate hidapi;
 
-use hidapi::*;
-
-fn ReceiveData(device: &HidDevice) -> Result<Vec<u8>,()> {
-    let mut usb_buf = vec![0u8; 65];
-    let mut err_cnt = 3;
-    let mut chk_sum = 0;
-    
-    loop {
-        usb_buf[0] = 0x01;
-        match device.get_feature_report(&mut usb_buf[..]) {
-            Ok(res) => {
-                if usb_buf[0] == 0x1 {
-                    for i in 0..res {
-                        chk_sum ^= usb_buf[i];
-                    }
-                    if chk_sum == 0 {
-                        break Err(());
-                    }
-                    break Ok(usb_buf);
-                }
-            },
-            Err(_)  => {
-                err_cnt -= 1;
-                if err_cnt == 0 {
-                    break Err(());
-                }
-            }
-        }
-    }
-}
-
-fn SendData(device: &HidDevice, data: &[u8]) {
-    let mut usb_buf = [0u8; 65];
-    let mut err_cnt = 3;
-
-    loop {
-        let mut chk_sum = 0;
-        usb_buf[0] = 0x01;
-        for i in 1..data.len() {
-            usb_buf[i + 1] = data[i];
-            chk_sum ^= data[i];
-        }
-
-        usb_buf[data.len() + 1] = chk_sum;
-        match device.send_feature_report(&usb_buf[..]) {
-            Ok(_) => break,
-            Err(_) => {
-                err_cnt -= 1;
-                if err_cnt == 0 {
-                    break;
-                }
-                ()
-            }            
-        }
-    }
-}
+use hidapi::HidApi;
 
 fn main() {
-    println!("Get the version data from the keyboard:");
+    println!("Get device data:");
 
-    let api = HidApi::new().unwrap();
-
-    // connect to the device using VID and PID
-    let (VID, PID) = (0x24f0, 0x2037);
-    let device = api.open(VID, PID).unwrap();
-
-    let usb_init = [0xea, 0x02, 0xb0];
-    SendData(&device, &usb_init[..]);
-    match ReceiveData(&device) {
-        Ok(data) => {
-            println!("It worked!")
-        },
-        Err(_) => ()
+    match HidApi::new() {
+        Ok(api) => {
+            for device in api.device_list() {
+                println!(
+                    "{:04x}:{:04x} {} - {} {}",
+                    device.vendor_id(),
+                    device.product_id(),
+                    device.path().to_string_lossy().into_owned(),
+                    device.product_string().unwrap_or("<Unknown>"),
+                    device.serial_number().unwrap_or("<None>")
+                );
+            }
+        }
+        Err(e) => {
+            eprintln!("Error: {}", e);
+        }
     }
 }