diff options
author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-02-27 21:27:20 +0000 |
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committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2011-02-27 21:27:20 +0000 |
commit | b82fdd50842676ed6972e5b85e55eb9b6207b610 (patch) | |
tree | c15b2bfbaf3e434818a98b3b25b4f031ca4eeab0 /nuttx/arch/arm | |
parent | ab53fe7d5beb43ef3fe90e8e3b0059ace5510846 (diff) |
Special IDLE for STM32 will execut WFI to sleep until an interrupt occurs
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3324 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'nuttx/arch/arm')
-rw-r--r-- | nuttx/arch/arm/src/common/up_idle.c | 20 | ||||
-rwxr-xr-x | nuttx/arch/arm/src/stm32/Make.defs | 10 | ||||
-rwxr-xr-x | nuttx/arch/arm/src/stm32/stm32_idle.c | 104 |
3 files changed, 118 insertions, 16 deletions
diff --git a/nuttx/arch/arm/src/common/up_idle.c b/nuttx/arch/arm/src/common/up_idle.c index ba6affb0e8..62557c3a8d 100644 --- a/nuttx/arch/arm/src/common/up_idle.c +++ b/nuttx/arch/arm/src/common/up_idle.c @@ -62,32 +62,30 @@ * 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. + * 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. + * 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_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. + /* 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 +#else /* Sleep until an interrupt occurs to save power */ #if 0 asm("WFI"); /* For example */ #endif +#endif } diff --git a/nuttx/arch/arm/src/stm32/Make.defs b/nuttx/arch/arm/src/stm32/Make.defs index 2979407300..7595ff944b 100755 --- a/nuttx/arch/arm/src/stm32/Make.defs +++ b/nuttx/arch/arm/src/stm32/Make.defs @@ -1,7 +1,7 @@ ############################################################################ # arch/arm/src/stm32/Make.defs # -# Copyright (C) 2009 Gregory Nutt. All rights reserved. +# Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. # Author: Gregory Nutt <spudmonkey@racsa.co.cr> # # Redistribution and use in source and binary forms, with or without @@ -38,14 +38,14 @@ HEAD_ASRC = stm32_vectors.S CMN_ASRCS = up_saveusercontext.S up_fullcontextrestore.S up_switchcontext.S CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \ up_createstack.c up_mdelay.c up_udelay.c up_exit.c \ - up_idle.c up_initialize.c up_initialstate.c up_interruptcontext.c \ + up_initialize.c up_initialstate.c up_interruptcontext.c \ up_modifyreg8.c up_modifyreg16.c up_modifyreg32.c \ up_releasepending.c up_releasestack.c up_reprioritizertr.c \ up_schedulesigaction.c up_sigdeliver.c up_unblocktask.c \ up_usestack.c up_doirq.c up_hardfault.c up_svcall.c CHIP_ASRCS = -CHIP_CSRCS = stm32_start.c stm32_rcc.c stm32_gpio.c stm32_irq.c \ - stm32_timerisr.c stm32_dma.c stm32_lowputc.c stm32_serial.c \ - stm32_spi.c stm32_usbdev.c stm32_sdio.c +CHIP_CSRCS = stm32_start.c stm32_rcc.c stm32_gpio.c stm32_idle.c \ + stm32_irq.c stm32_timerisr.c stm32_dma.c stm32_lowputc.c \ + stm32_serial.c stm32_spi.c stm32_usbdev.c stm32_sdio.c diff --git a/nuttx/arch/arm/src/stm32/stm32_idle.c b/nuttx/arch/arm/src/stm32/stm32_idle.c new file mode 100755 index 0000000000..7a5cdf0f35 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/stm32_idle.c @@ -0,0 +1,104 @@ +/****************************************************************************
+ * arch/arm/src/stm32/stm32_idle.c
+ *
+ * Copyright (C) 2011 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 <arch/board/board.h>
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include "up_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Does the board support an IDLE LED to indicate that the board is in the
+ * IDLE state?
+ */
+
+#if defined(CONFIG_ARCH_LEDS) && defined(LED_IDLE)
+# define BEGIN_IDLE() up_ledon(LED_IDLE)
+# define END_IDLE() up_ledoff(LED_IDLE)
+#else
+# define BEGIN_IDLE()
+# define END_IDLE()
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * 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_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();
+#else
+
+ /* Sleep until an interrupt occurs to save power */
+
+ BEGIN_IDLE();
+ asm("WFI");
+ END_IDLE();
+#endif
+}
+
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