sync

firmware/src/usb.c

@@ -95,6 +95,18 @@ void usb_write_buffer(const uint8_t *buf, size_t len)
     }
 }
 
+void usb_flush_rx(void)
+{
+    uint8_t dummy;
+    if (!device_is_ready(cdc_dev)) return;
+    
+    // Alles lesen, was gerade im Hardware-FIFO liegt
+    while (uart_fifo_read(cdc_dev, &dummy, 1) > 0);
+    
+    // Semaphore zurücksetzen, falls sie gesetzt war
+    k_sem_reset(&usb_rx_sem);
+}
+
 static void usb_status_cb(enum usb_dc_status_code cb_status, const uint8_t *param)
 {
     switch (cb_status) {