feat(check): add check for endpoint table length

src/lib.rs

@@ -38,16 +38,14 @@ impl<const L: usize> UsbBus for UsbDevice<L> {
 
                 // If ep_aadr not provided, or current endpoint is allocated, try to find next free endpoint, otherwise return UsbError. //
                 _ => {
-                    let index = self
-                        .ep_table
+                    let index = self.ep_table[1..]
                         .iter()
                         .enumerate()
-                        .skip(1)
                         .find(|(index, ep)| {
                             !ep.is_allocated && max_packet_size <= ENDPOINTS_ALLOC_LAYOUT[*index]
                         })
-                        .ok_or(UsbError::EndpointOverflow)?
-                        .0;
+                        .map(|(index, _)| index)
+                        .ok_or(UsbError::EndpointOverflow)?;
 
                     EndpointAddress::from_parts(index, ep_dir)
                 }

src/types/usb_device.rs

@@ -84,13 +84,17 @@ pub(crate) const ONE_MS_16_MGHZ: u32 = 16000;
 impl<const L: usize> UsbDevice<L> {
     #[inline]
     pub fn new(pll: PLL, usb: USB_DEVICE) -> UsbBusAllocator<Self> {
-        UsbBusAllocator::new(Self {
-            pll: Mutex::new(pll),
-            usb: Mutex::new(usb),
-            ep_table: [USBEndpoint::default(); L],
-            pending_ins: Mutex::new(Cell::new(0u8)),
-            dpram_already_used: 0,
-        })
+        if L > 1 {
+            UsbBusAllocator::new(Self {
+                pll: Mutex::new(pll),
+                usb: Mutex::new(usb),
+                ep_table: [USBEndpoint::default(); L],
+                pending_ins: Mutex::new(Cell::new(0u8)),
+                dpram_already_used: 0,
+            })
+        } else {
+            panic!("Endpoint table cannot be with length <= 1")
+        }
     }
 
     #[inline(always)]