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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-12-29 01:05:26 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-12-29 01:05:26 +0000 |
commit | 1bfc8f64f63f26c6fe29fd2a5566bf84582b2048 (patch) | |
tree | b84c19d6f707c1156c94db5885328675aa37c886 /nuttx/arch/z80/src/common/up_idle.c | |
parent | 7e806d1ed76f03fbab77ab38b148b2a9c02eeba1 (diff) | |
download | nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.tar.gz nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.tar.bz2 nuttx-1bfc8f64f63f26c6fe29fd2a5566bf84582b2048.zip |
Import of z80 target
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@455 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/z80/src/common/up_idle.c')
-rw-r--r-- | nuttx/arch/z80/src/common/up_idle.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/nuttx/arch/z80/src/common/up_idle.c b/nuttx/arch/z80/src/common/up_idle.c new file mode 100644 index 000000000..e2fb1e00f --- /dev/null +++ b/nuttx/arch/z80/src/common/up_idle.c @@ -0,0 +1,107 @@ +/**************************************************************************** + * common/up_idle.c + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <nuttx/arch.h> +#include <arch/board/board.h> + +#include "up_internal.h" + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#if defined(CONFIG_ARCH_LEDS) && defined(CONFIG_ARCH_BRINGUP) +static ubyte g_ledtoggle = 0; +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_idle + * + * Description: + * up_idle() is the logic that will be executed when their + * is no other ready-to-run task. This is processor idle + * time and will continue until some interrupt occurs to + * cause a context switch from the idle task. + * + * Processing in this state may be processor-specific. e.g., + * this is where power management operations might be + * performed. + * + ****************************************************************************/ + +void up_idle(void) +{ +#if defined(CONFIG_ARCH_LEDS) && defined(CONFIG_ARCH_BRINGUP) + g_ledtoggle++; + if (g_ledtoggle == 0x80) + { + up_ledon(LED_IDLE); + } + else if (g_ledtoggle == 0x00) + { + up_ledoff(LED_IDLE); + } +#endif + +#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS) + /* If the system is idle and there are no timer interrupts, + * then process "fake" timer interrupts. Hopefully, something + * will wake up. + */ + + sched_process_timer(); +#endif +} + |