/*
 * PD Buddy Firmware Library - USB Power Delivery for everyone
 * Copyright 2017-2018 Clayton G. Hobbs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef PDB_PROTOCOL_RX_H
#define PDB_PROTOCOL_RX_H

#include <stdint.h>

#include <pd.h>

/* Events for the Protocol RX thread */
#define PDB_EVT_PRLRX_RESET      EVENT_MASK(0)
#define PDB_EVT_PRLRX_I_GCRCSENT EVENT_MASK(1)
#define PDB_EVT_PRLRX_I_RXPEND   EVENT_MASK(2)

class ProtocolReceive {
public:
  static void init();
  static void notify(uint32_t notification);

private:
  static void thread(const void *args);

  static EventGroupHandle_t  xEventGroupHandle;
  static StaticEventGroup_t  xCreatedEventGroup;
  static osThreadId          TaskHandle;
  static const size_t        TaskStackSize = 1024 / 4;
  static uint32_t            TaskBuffer[TaskStackSize];
  static osStaticThreadDef_t TaskControlBlock;
  /*
   * Protocol RX machine states
   *
   * There is no Send_GoodCRC state because the PHY sends the GoodCRC for us.
   * All transitions that would go to that state instead go to Check_MessageID.
   */
  enum protocol_rx_state { PRLRxWaitPHY, PRLRxReset, PRLRxCheckMessageID, PRLRxStoreMessageID };
  static protocol_rx_state protocol_rx_store_messageid();
  static protocol_rx_state protocol_rx_check_messageid();
  static protocol_rx_state protocol_rx_reset();
  static protocol_rx_state protocol_rx_wait_phy();
  static union pd_msg      tempMessage;
  static uint32_t          waitForEvent(uint32_t mask, TickType_t ticksToWait = portMAX_DELAY);
};

#endif /* PDB_PROTOCOL_RX_H */