/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT 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.

    ChibiOS/RT 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 <http://www.gnu.org/licenses/>.
*/

#include "ch.h"
#include "hal.h"
#include "test.h"

#include "lwipthread.h"

#include "usbshell.h"
#include "web/web.h"

/*===========================================================================*/
/* Card insertion monitor.                                                   */
/*===========================================================================*/

#define POLLING_INTERVAL                10
#define POLLING_DELAY                   10

/**
 * @brief   Card monitor timer.
 */
static VirtualTimer tmr;

/**
 * @brief   Debounce counter.
 */
static unsigned cnt;

/**
 * @brief   Card event sources.
 */
static EventSource inserted_event, removed_event;

/**
 * @brief   Insertion monitor timer callback function.
 *
 * @param[in] p         pointer to the @p BaseBlockDevice object
 *
 * @notapi
 */
static void tmrfunc(void *p) {
  BaseBlockDevice *bbdp = p;

  /* The presence check is performed only while the driver is not in a
     transfer state because it is often performed by changing the mode of
     the pin connected to the CS/D3 contact of the card, this could disturb
     the transfer.*/
  blkstate_t state = blkGetDriverState(bbdp);
  chSysLockFromIsr();
  if ((state != BLK_READING) && (state != BLK_WRITING)) {
    /* Safe to perform the check.*/
    if (cnt > 0) {
      if (blkIsInserted(bbdp)) {
        if (--cnt == 0) {
          chEvtBroadcastI(&inserted_event);
        }
      }
      else
        cnt = POLLING_INTERVAL;
    }
    else {
      if (!blkIsInserted(bbdp)) {
        cnt = POLLING_INTERVAL;
        chEvtBroadcastI(&removed_event);
      }
    }
  }
  chVTSetI(&tmr, MS2ST(POLLING_DELAY), tmrfunc, bbdp);
  chSysUnlockFromIsr();
}

/**
 * @brief   Polling monitor start.
 *
 * @param[in] p         pointer to an object implementing @p BaseBlockDevice
 *
 * @notapi
 */
static void tmr_init(void *p) {

  chEvtInit(&inserted_event);
  chEvtInit(&removed_event);
  chSysLock();
  cnt = POLLING_INTERVAL;
  chVTSetI(&tmr, MS2ST(POLLING_DELAY), tmrfunc, p);
  chSysUnlock();
}

/*===========================================================================*/
/* Main and generic code.                                                    */
/*===========================================================================*/

/*
 * Card insertion event.
 */
static void InsertHandler(eventid_t id) {

  (void)id;
}

/*
 * Card removal event.
 */
static void RemoveHandler(eventid_t id) {

  (void)id;
}

/*
 * Green LED blinker thread, times are in milliseconds.
 */
static WORKING_AREA(waThread1, 128);
static msg_t Thread1(void *arg) {

  (void)arg;
  chRegSetThreadName("blinker");
  while (TRUE) {
    palClearPad(GPIOC, GPIOC_LED);
    chThdSleepMilliseconds(500);
    palSetPad(GPIOC, GPIOC_LED);
    chThdSleepMilliseconds(500);
  }
}

/*
 * Application entry point.
 */
int main(void) {
  static const evhandler_t evhndl[] = {
    InsertHandler,
    RemoveHandler
  };
  struct EventListener el0, el1;

  /*
   * System initializations.
   * - HAL initialization, this also initializes the configured device drivers
   *   and performs the board-specific initializations.
   * - Kernel initialization, the main() function becomes a thread and the
   *   RTOS is active.
   */
  halInit();
  chSysInit();

  /*
   * Activates the shell on the USB-CDC.
   */
  usInit();

  /*
   * Activates the serial driver 6 using the driver default configuration.
   */
  sdStart(&SD6, NULL);

  /*
   * Activates the card insertion monitor.
   */
  tmr_init(&SDCD1);

  /*
   * Creates the blinker thread.
   */
  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);

  /*
   * Creates the LWIP threads (it changes priority internally).
   */
  chThdCreateStatic(wa_lwip_thread, LWIP_THREAD_STACK_SIZE, NORMALPRIO + 1,
                    lwip_thread, NULL);

  /*
   * Creates the HTTP thread (it changes priority internally).
   */
  chThdCreateStatic(wa_http_server, sizeof(wa_http_server), NORMALPRIO + 1,
                    http_server, NULL);

  /*
   * Normal main() thread activity, in this demo it does nothing except
   * sleeping in a loop and listen for events.
   */
  chEvtRegister(&inserted_event, &el0, 0);
  chEvtRegister(&removed_event, &el1, 1);
  while (TRUE) {
    usStateCheck();
    if (palReadPad(GPIOA, GPIOA_BUTTON_WKUP) != 0) {
    }
    chEvtDispatch(evhndl, chEvtWaitOne(ALL_EVENTS));
  }
}