From e7aa562c0ba467267e7db306fe994093facbff10 Mon Sep 17 00:00:00 2001
From: Eduard Iten <eduard@iten.pro>
Date: Wed, 25 Feb 2026 11:41:07 +0100
Subject: [PATCH] sync

---
 buzzer_tool/config.yaml |  3 ++-
 firmware/src/protocol.c |  2 ++
 firmware/src/usb.c      | 12 ++++++++++++
 firmware/src/usb.h      |  5 +++++
 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/buzzer_tool/config.yaml b/buzzer_tool/config.yaml
index ee8d3b4..4a928aa 100644
--- a/buzzer_tool/config.yaml
+++ b/buzzer_tool/config.yaml
@@ -1,4 +1,5 @@
 # config.yaml
 serial:
   port: "COM15"
-  baudrate: 112500
\ No newline at end of file
+  baudrate: 112500
+  timeout: 20
\ No newline at end of file
diff --git a/firmware/src/protocol.c b/firmware/src/protocol.c
index ba4864d..1731522 100644
--- a/firmware/src/protocol.c
+++ b/firmware/src/protocol.c
@@ -208,6 +208,7 @@ void execute_current_command(void)
         }
         else
         {
+            usb_flush_rx();
             send_error(rc);
         }
         break;
@@ -222,6 +223,7 @@ protocol_state_t waiting_for_command(uint8_t byte)
 {
     if (byte < 'a' || byte > 'z')
     {
+        LOG_DBG("Ignoring non-command byte: 0x%02x", byte); // Nur aktivieren, wenn nötig!
         rx_index = 0;
         return PS_WAITING_FOR_COMMAND;
     }
diff --git a/firmware/src/usb.c b/firmware/src/usb.c
index 2c96317..8044086 100644
--- a/firmware/src/usb.c
+++ b/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) {
diff --git a/firmware/src/usb.h b/firmware/src/usb.h
index 84fb6ac..9ece4ee 100644
--- a/firmware/src/usb.h
+++ b/firmware/src/usb.h
@@ -47,4 +47,9 @@ void usb_write_char(uint8_t c);
  */
 void usb_write_buffer(const uint8_t *buf, size_t len);
 
+/**
+ * @brief Flushes the USB RX FIFO
+ */
+void usb_flush_rx(void);
+
 #endif // USB_CDC_ACM_H
\ No newline at end of file