1 files changed, 54 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32/usb_serial.cpp b/Marlin/src/HAL/STM32/usb_serial.cpp
new file mode 100644
index 0000000..705d649
--- /dev/null
+++ b/Marlin/src/HAL/STM32/usb_serial.cpp
@@ -0,0 +1,54 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(EMERGENCY_PARSER) && USBD_USE_CDC
+
+#include "usb_serial.h"
+#include "../../feature/e_parser.h"
+
+EmergencyParser::State emergency_state = EmergencyParser::State::EP_RESET;
+
+int8_t (*USBD_CDC_Receive_original) (uint8_t *Buf, uint32_t *Len) = nullptr;
+
+static int8_t USBD_CDC_Receive_hook(uint8_t *Buf, uint32_t *Len) {
+  for (uint32_t i = 0; i < *Len; i++)
+    emergency_parser.update(emergency_state, Buf[i]);
+  return USBD_CDC_Receive_original(Buf, Len);
+}
+
+typedef struct _USBD_CDC_Itf {
+  int8_t (* Init)(void);
+  int8_t (* DeInit)(void);
+  int8_t (* Control)(uint8_t cmd, uint8_t *pbuf, uint16_t length);
+  int8_t (* Receive)(uint8_t *Buf, uint32_t *Len);
+  int8_t (* Transferred)(void);
+} USBD_CDC_ItfTypeDef;
+
+extern USBD_CDC_ItfTypeDef USBD_CDC_fops;
+
+void USB_Hook_init() {
+  USBD_CDC_Receive_original = USBD_CDC_fops.Receive;
+  USBD_CDC_fops.Receive = USBD_CDC_Receive_hook;
+}
+
+#endif // EMERGENCY_PARSER && USBD_USE_CDC
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC