nuttx/configs/sim/src/sim_touchscreen.c

/****************************************************************************
 * config/sim/src/sim_touchscreen.c
 *
 *   Copyright (C) 2011, 2016-2018 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <sys/boardctl.h>
#include <stdint.h>
#include <stdbool.h>
#include <sched.h>
#include <semaphore.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/sched.h>
#include <nuttx/board.h>
#include <nuttx/video/fb.h>
#include <nuttx/input/touchscreen.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>

#ifdef CONFIG_VNCSERVER
#  include <nuttx/video/vnc.h>
#endif

#include "up_internal.h"

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/
/* Configuration ************************************************************/
/* Pick a background color */

#ifndef CONFIG_EXAMPLES_TOUCHSCREEN_BGCOLOR
#  define CONFIG_EXAMPLES_TOUCHSCREEN_BGCOLOR 0x007b68ee
#endif

/****************************************************************************
 * Private Types
 ****************************************************************************/

struct sim_touchscreen_s
{
  NXHANDLE hnx;
  bool connected;
  sem_t eventsem;
};

/****************************************************************************
 * Private Data
 ****************************************************************************/

static struct sim_touchscreen_s g_simtc =
{
  NULL,               /* hnx */
  false,              /* connected */
  SEM_INITIALIZER(0), /* eventsem */
};

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: sim_listener
 ****************************************************************************/

static FAR void *sim_listener(FAR void *arg)
{
  int ret;

  /* Process events forever */

  for (;;)
    {
      /* Handle the next event.  If we were configured blocking, then
       * we will stay right here until the next event is received.  Since
       * we have dedicated a while thread to servicing events, it would
       * be most natural to also select CONFIG_NX_BLOCKING -- if not, the
       * following would be a tight infinite loop (unless we added addition
       * logic with nx_eventnotify and sigwait to pace it).
       */

      ret = nx_eventhandler(g_simtc.hnx);
      if (ret < 0)
        {
          /* An error occurred... assume that we have lost connection with
           * the server.
           */

          fwarn("WARNING: Lost server connection: %d\n", errno);
          pthread_exit(NULL);
        }

      /* If we received a message, we must be connected */

      if (!g_simtc.connected)
        {
          g_simtc.connected = true;
          sem_post(&g_simtc.eventsem);
          ginfo("Connected\n");
        }
    }

  return NULL; /* Not-reachable */
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: sim_tsc_setup
 *
 * Description:
 *   This function is called by board-bringup logic to configure the
 *   touchscreen device.  This function will register the driver as
 *   /dev/inputN where N is the minor device number.
 *
 * Input Parameters:
 *   minor   - The input device minor number
 *
 * Returned Value:
 *   Zero is returned on success.  Otherwise, a negated errno value is
 *   returned to indicate the nature of the failure.
 *
 ****************************************************************************/

int sim_tsc_setup(int minor)
{
  struct sched_param param;
  nxgl_mxpixel_t color;
  pthread_t thread;
  int ret;

  /* Set the client task priority */

  param.sched_priority = CONFIG_SIM_CLIENTPRIO;
  ret = nxsched_setparam(0, &param);
  if (ret < 0)
    {
      gerr("ERROR: nxsched_setparam failed: %d\n" , ret);
      return ret;
    }

  /* Start the NX server kernel thread */

  ret = boardctl(BOARDIOC_NX_START, 0);
  if (ret < 0)
    {
      gerr("ERROR: Failed to start the NX server: %d\n", errno);
      return ret;
    }

  /* Connect to the server */

  g_simtc.hnx = nx_connect();
  if (g_simtc.hnx)
    {
       pthread_attr_t attr;

#ifdef CONFIG_VNCSERVER
      /* Setup the VNC server to support keyboard/mouse inputs */

      ret = vnc_default_fbinitialize(0, g_simtc.hnx);
      if (ret < 0)
        {
          ginfo("ERROR: vnc_default_fbinitialize failed: %d\n", ret);
          nx_disconnect(g_simtc.hnx);
          return ret;
        }
#endif
       /* Start a separate thread to listen for server events.  This is probably
        * the least efficient way to do this, but it makes this example flow more
        * smoothly.
        */

       (void)pthread_attr_init(&attr);
       param.sched_priority = CONFIG_SIM_LISTENERPRIO;
       (void)pthread_attr_setschedparam(&attr, &param);
       (void)pthread_attr_setstacksize(&attr, CONFIG_SIM_LISTENER_STACKSIZE);

       ret = pthread_create(&thread, &attr, sim_listener, NULL);
       if (ret != 0)
         {
            gerr("ERROR: pthread_create failed: %d\n", ret);
            return -ret;
         }

       /* Don't return until we are connected to the server */

       while (!g_simtc.connected)
         {
           /* Wait for the listener thread to wake us up when we really
            * are connected.
            */

           (void)sem_wait(&g_simtc.eventsem);
         }
    }
  else
    {
      gerr("ERROR: nx_connect failed: %d\n", errno);
      return ERROR;
    }

  /* Set the background to the configured background color */

  iinfo("Set background color=%d\n", CONFIG_EXAMPLES_TOUCHSCREEN_BGCOLOR);

  color = CONFIG_EXAMPLES_TOUCHSCREEN_BGCOLOR;
  ret = nx_setbgcolor(g_simtc.hnx, &color);
  if (ret < 0)
    {
      ierr("ERROR: nx_setbgcolor failed: %d\n", ret);
      goto errout_with_nx;
    }

  /* Finally, initialize the touchscreen simulation on the X window */

  ret = sim_tsc_initialize(minor);
  if (ret < 0)
    {
      ierr("ERROR: sim_tsc_initialize failed: %d\n", ret);
      goto errout_with_nx;
    }

  return OK;

errout_with_nx:
  nx_disconnect(g_simtc.hnx);
  goto errout;

errout:
  return ret;
}