text: /**
   * 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)
  
  #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
  #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC
  