799d40d32d
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4376 42af7a65-404d-4744-a932-0658087f49c3
160 lines
4.9 KiB
C
160 lines
4.9 KiB
C
/****************************************************************************
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* up_idle.c
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*
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* Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <time.h>
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#include <nuttx/arch.h>
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#include <nuttx/power/pm.h>
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#include "up_internal.h"
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/****************************************************************************
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* Private Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_SIM_X11FB
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static int g_x11refresh = 0;
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#if defined(CONFIG_SIM_WALLTIME) || defined(CONFIG_SIM_X11FB)
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extern int up_hostusleep(unsigned int usec);
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#ifdef CONFIG_SIM_X11FB
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extern void up_x11update(void);
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#endif
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_idle
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*
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* Description:
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* up_idle() is the logic that will be executed when their
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* is no other ready-to-run task. This is processor idle
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* time and will continue until some interrupt occurs to
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* cause a context switch from the idle task.
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*
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* Processing in this state may be processor-specific. e.g.,
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* this is where power management operations might be
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* performed.
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*
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****************************************************************************/
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void up_idle(void)
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{
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/* If the system is idle, then process "fake" timer interrupts.
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* Hopefully, something will wake up.
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*/
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sched_process_timer();
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/* Run the network if enabled */
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#ifdef CONFIG_NET
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uipdriver_loop();
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#endif
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/* Fake some power management stuff for testing purposes */
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#ifdef CONFIG_PM
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{
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static enum pm_state_e state = PM_NORMAL;
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enum pm_state_e newstate;
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newstate = pm_checkstate();
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if (newstate != state)
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{
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if (pm_changestate(newstate) == OK)
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{
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state = newstate;
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}
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}
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}
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#endif
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/* Wait a bit so that the sched_process_timer() is called close to the
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* correct rate.
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*/
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#if defined(CONFIG_SIM_WALLTIME) || defined(CONFIG_SIM_X11FB)
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(void)up_hostusleep(1000000 / CLK_TCK);
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/* Handle X11-related events */
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#ifdef CONFIG_SIM_X11FB
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if (g_x11initialized)
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{
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/* Drive the X11 event loop */
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#ifdef CONFIG_SIM_TOUCHSCREEN
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if (g_eventloop)
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{
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up_x11events();
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}
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#endif
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/* Update the display periodically */
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g_x11refresh += 1000000 / CLK_TCK;
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if (g_x11refresh > 500000)
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{
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up_x11update();
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}
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}
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#endif
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#endif
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}
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