mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-04-20 05:21:59 -04:00
Update EFM32 demos to include an option to use the RTC as the clock source when using low power tickless mode.
This commit is contained in:
Richard Barry
parent
c4dd17eeb5
commit
556de14a1d
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@ -53,7 +53,7 @@
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<listOptionValue builtIn="false" value=""${workspace_loc:/${ProjName}/Source/SilLabs_Code/kits/EFM32GG_STK3700/config}""/>
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<listOptionValue builtIn="false" value=""${workspace_loc:/${ProjName}/Source/SilLabs_Code/Device/SiliconLabs/EFM32GG/Include}""/>
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</option>
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<option id="gnu.c.compiler.option.preprocessor.undef.symbol.1550566013" name="Undefined symbols (-U)" superClass="gnu.c.compiler.option.preprocessor.undef.symbol" valueType="undefDefinedSymbols"/>
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<option id="gnu.c.compiler.option.preprocessor.undef.symbol.1550566013" name="Undefined symbols (-U)" superClass="gnu.c.compiler.option.preprocessor.undef.symbol"/>
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<inputType id="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.input.733848972" superClass="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.input"/>
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</tool>
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<tool id="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base.1840601111" name="GNU ARM C++ Compiler" superClass="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base">
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@ -103,6 +103,9 @@
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<tool id="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.archiver.base.1920617400" name="GNU ARM Archiver" superClass="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.archiver.base"/>
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</toolChain>
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</folderInfo>
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<fileInfo id="com.silabs.ide.si32.gcc.debug#com.silabs.ide.si32.gcc:4.8.3.20131129.566130702" name="low_power_tick_management_BURTC.c" rcbsApplicability="disable" resourcePath="Source/Low_Power_Demo/low_power_tick_management_BURTC.c" toolsToInvoke="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base.1299820402.669016646">
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<tool id="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base.1299820402.669016646" name="GNU ARM C Compiler" superClass="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base.1299820402"/>
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</fileInfo>
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<sourceEntries>
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<entry excluding="Source/FreeRTOS_Source/portable/GCC/ARM_CM4F|Source/SilLabs_Code/kits/EFM32WG_STK3800|Source/SilLabs_Code/Device/SiliconLabs/EFM32GG/Source|Source/SilLabs_Code/Device/SiliconLabs/EFM32WG|Source/SilLabs_Code/CMSIS/efm32wg|CMSIS/efm32wg|Source/SilLabs_Code/kits/bsp/bsp_dk_3201.c|Source/SilLabs_Code/kits/bsp/bsp_dk_3200.c|Source/SilLabs_Code/kits/bsp/bsp_dk_leds.c|Source/RTT|Source/SilLabs_Code/kits/bsp/bsp_dk_mcuboard.c|Source/SilLabs_Code/kits/bsp/bsp_bcc.c" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
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</sourceEntries>
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@ -87,28 +87,24 @@ extern "C" {
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*----------------------------------------------------------*/
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/* Set configCREATE_LOW_POWER_DEMO to one to run the simple blinky demo low power
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example, or 1 to run the more comprehensive test and demo application. See
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the comments at the top of main.c for more information. */
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#define configCREATE_LOW_POWER_DEMO 1
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/* Set configCREATE_LOW_POWER_DEMO as follows:
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*
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* 0: Build the full test and demo application.
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* 1: Build the simple blinky tickless low power demo, generating the tick
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* interrupt from the BURTC. EM3 will be entered, but use of the ULFRCO
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* clock means timing will be inaccurate.
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* 2: Build the simple blinky tickless low power demo, generating the tick from
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* the RTC. EM2 will be entered. The LXFO clock is used, which is more
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* accurate than the ULFRCO clock.
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* See the comments at the top of main.c, main_full.c and main_low_power.c for
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* more information.
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*/
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#define configCREATE_LOW_POWER_DEMO 2
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/* Some configuration is dependent on the demo being built. */
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#if( configCREATE_LOW_POWER_DEMO == 1 )
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#if( configCREATE_LOW_POWER_DEMO == 0 )
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/* The slow clock used to generate the tick interrupt in the low power demo
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runs at 32768Hz. Ensure the clock is a multiple of the tick rate. */
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#define configTICK_RATE_HZ ( 100 )
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/* The low power demo uses the tickless idle feature. */
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#define configUSE_TICKLESS_IDLE 1
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/* Hook function related definitions. */
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#define configUSE_TICK_HOOK ( 0 )
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#define configCHECK_FOR_STACK_OVERFLOW ( 0 )
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#define configUSE_MALLOC_FAILED_HOOK ( 0 )
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#define configUSE_IDLE_HOOK ( 0 )
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#else
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/* Tickless mode is not used. */
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/* Some of the standard demo test tasks assume a tick rate of 1KHz, even
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though that is faster than would normally be warranted by a real
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@ -126,6 +122,48 @@ the comments at the top of main.c for more information. */
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#define configUSE_MALLOC_FAILED_HOOK ( 1 )
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#define configUSE_IDLE_HOOK ( 1 )
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#define configENERGY_MODE ( sleepEM3 )
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#elif( configCREATE_LOW_POWER_DEMO == 1 )
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/* Tickless idle mode, generating RTOS tick interrupts from the BURTC, fed
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by the [inaccurate] ULFRCO clock. */
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/* The slow clock used to generate the tick interrupt in the low power demo
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runs at 2KHz. Ensure the tick rate is a multiple of the clock. */
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#define configTICK_RATE_HZ ( 100 )
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/* The low power demo uses the tickless idle feature. */
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#define configUSE_TICKLESS_IDLE 1
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/* Hook function related definitions. */
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#define configUSE_TICK_HOOK ( 0 )
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#define configCHECK_FOR_STACK_OVERFLOW ( 0 )
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#define configUSE_MALLOC_FAILED_HOOK ( 0 )
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#define configUSE_IDLE_HOOK ( 0 )
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#define configENERGY_MODE ( sleepEM4 )
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#elif( configCREATE_LOW_POWER_DEMO == 2 )
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/* Tickless idle mode, generating RTOS tick interrupts from the RTC, fed
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by the LXFO clock. */
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/* The slow clock used to generate the tick interrupt in the low power demo
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runs at 32768/8=4096Hz. Ensure the tick rate is a multiple of the clock. */
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#define configTICK_RATE_HZ ( 128 )
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/* The low power demo uses the tickless idle feature. */
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#define configUSE_TICKLESS_IDLE 1
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/* Hook function related definitions. */
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#define configUSE_TICK_HOOK ( 0 )
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#define configCHECK_FOR_STACK_OVERFLOW ( 0 )
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#define configUSE_MALLOC_FAILED_HOOK ( 0 )
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#define configUSE_IDLE_HOOK ( 0 )
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#define configENERGY_MODE ( sleepEM3 )
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#endif
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/* Main functions*/
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@ -71,8 +71,9 @@
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* NOTE 1: This project provides two demo applications. A simple blinky style
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* project that demonstrates the tickless low power features of FreeRTOS, and a
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* more comprehensive test and demo application. The configCREATE_LOW_POWER_DEMO
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* setting in FreeRTOSConifg.h is used to select between the two. See the notes
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* on using conifgCREATE_LOW_POWER_DEMO in main.c. This file implements the
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* setting in FreeRTOSConifg.h is used to select between the two, and to select
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* the clock used when tickless mode is used. See the notes on using
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* conifgCREATE_LOW_POWER_DEMO in main.c. This file implements the
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* comprehensive test and demo version.
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*
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* NOTE 2: This file only contains the source code that is specific to the
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@ -83,7 +83,9 @@
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#include "em_int.h"
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#include "sleep.h"
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/* This file contains functions that will override the default implementations
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/* SEE THE COMMENTS ABOVE THE DEFINITION OF configCREATE_LOW_POWER_DEMO IN
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FreeRTOSConfig.h
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This file contains functions that will override the default implementations
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in the RTOS port layer. Therefore only build this file if the low power demo
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is being built. */
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#if( configCREATE_LOW_POWER_DEMO == 1 )
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@ -98,7 +100,8 @@ is being built. */
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*/
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void vPortSetupTimerInterrupt( void );
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/* Override the default definition of vPortSuppressTicksAndSleep() that is
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/*
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* Override the default definition of vPortSuppressTicksAndSleep() that is
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* weakly defined in the FreeRTOS Cortex-M port layer with a version that
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* manages the BURTC clock, as the tick is generated from the low power BURTC
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* and not the SysTick as would normally be the case on a Cortex-M.
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@ -110,12 +113,11 @@ void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
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/* Calculate how many clock increments make up a single tick period. */
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static const uint32_t ulReloadValueForOneTick = ( mainTIMER_FREQUENCY_HZ / configTICK_RATE_HZ );
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/* Calculate the maximum number of ticks that can be suppressed when using the
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high resolution clock and low resolution clock respectively. */
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/* Will hold the maximum number of ticks that can be suppressed. */
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static uint32_t xMaximumPossibleSuppressedTicks = 0;
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/* Flag set from the tick interrupt to allow the sleep processing to know if
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sleep mode was exited because of an timer interrupt or a different interrupt. */
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sleep mode was exited because of a timer interrupt or a different interrupt. */
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static volatile uint32_t ulTickFlag = pdFALSE;
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/* As the clock is only 2KHz, it is likely a value of 1 will be too much, so
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@ -129,6 +131,8 @@ void vPortSetupTimerInterrupt( void )
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{
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BURTC_Init_TypeDef xBURTCInitStruct = BURTC_INIT_DEFAULT;
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/* Configure the BURTC to generate the RTOS tick interrupt. */
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xMaximumPossibleSuppressedTicks = ULONG_MAX / ulReloadValueForOneTick;
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/* Ensure LE modules are accessible. */
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@ -145,7 +149,7 @@ BURTC_Init_TypeDef xBURTCInitStruct = BURTC_INIT_DEFAULT;
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BURTC_IntDisable( BURTC_IF_COMP0 );
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BURTC_Init( &xBURTCInitStruct );
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/* The tick interrupt must be set to the lowest possible. */
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/* The tick interrupt must be set to the lowest priority possible. */
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NVIC_SetPriority( BURTC_IRQn, configKERNEL_INTERRUPT_PRIORITY );
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NVIC_ClearPendingIRQ( BURTC_IRQn );
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NVIC_EnableIRQ( BURTC_IRQn );
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@ -303,7 +307,7 @@ void BURTC_IRQHandler(void)
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{
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if( ulTickFlag == pdFALSE )
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{
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/* Set BURTC interrupt to one system tick period*/
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/* Set BURTC interrupt to one RTOS tick period. */
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BURTC_Enable( false );
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BURTC_CompareSet( 0, ulReloadValueForOneTick );
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ulTickFlag = pdTRUE;
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@ -0,0 +1,341 @@
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/*
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FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
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All rights reserved
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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***************************************************************************
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>>! NOTE: The modification to the GPL is included to allow you to !<<
|
||||
>>! distribute a combined work that includes FreeRTOS without being !<<
|
||||
>>! obliged to provide the source code for proprietary components !<<
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>>! outside of the FreeRTOS kernel. !<<
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***************************************************************************
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
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FOR A PARTICULAR PURPOSE. Full license text is available on the following
|
||||
link: http://www.freertos.org/a00114.html
|
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|
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***************************************************************************
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||||
* *
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||||
* FreeRTOS provides completely free yet professionally developed, *
|
||||
* robust, strictly quality controlled, supported, and cross *
|
||||
* platform software that is more than just the market leader, it *
|
||||
* is the industry's de facto standard. *
|
||||
* *
|
||||
* Help yourself get started quickly while simultaneously helping *
|
||||
* to support the FreeRTOS project by purchasing a FreeRTOS *
|
||||
* tutorial book, reference manual, or both: *
|
||||
* http://www.FreeRTOS.org/Documentation *
|
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* *
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||||
***************************************************************************
|
||||
|
||||
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
||||
the FAQ page "My application does not run, what could be wrong?". Have you
|
||||
defined configASSERT()?
|
||||
|
||||
http://www.FreeRTOS.org/support - In return for receiving this top quality
|
||||
embedded software for free we request you assist our global community by
|
||||
participating in the support forum.
|
||||
|
||||
http://www.FreeRTOS.org/training - Investing in training allows your team to
|
||||
be as productive as possible as early as possible. Now you can receive
|
||||
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
||||
Ltd, and the world's leading authority on the world's leading RTOS.
|
||||
|
||||
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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||||
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
|
||||
compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
||||
|
||||
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
||||
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
||||
|
||||
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
||||
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
||||
licenses offer ticketed support, indemnification and commercial middleware.
|
||||
|
||||
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
||||
engineered and independently SIL3 certified version for use in safety and
|
||||
mission critical applications that require provable dependability.
|
||||
|
||||
1 tab == 4 spaces!
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*/
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/* FreeRTOS includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* SiLabs library includes. */
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#include "em_cmu.h"
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#include "em_rtc.h"
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#include "em_rmu.h"
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#include "em_int.h"
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#include "sleep.h"
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/* SEE THE COMMENTS ABOVE THE DEFINITION OF configCREATE_LOW_POWER_DEMO IN
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FreeRTOSConfig.h
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This file contains functions that will override the default implementations
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in the RTOS port layer. Therefore only build this file if the low power demo
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is being built. */
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#if( configCREATE_LOW_POWER_DEMO == 2 )
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#define mainTIMER_FREQUENCY_HZ ( 4096UL ) /* 32768 clock divided by 8. */
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/*
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* The low power demo does not use the SysTick, so override the
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* vPortSetupTickInterrupt() function with an implementation that configures
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* a low power clock source. NOTE: This function name must not be changed as
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* it is called from the RTOS portable layer.
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*/
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void vPortSetupTimerInterrupt( void );
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/*
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* Override the default definition of vPortSuppressTicksAndSleep() that is
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* weakly defined in the FreeRTOS Cortex-M port layer with a version that
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* manages the RTC clock, as the tick is generated from the low power RTC
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* and not the SysTick as would normally be the case on a Cortex-M.
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*/
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void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime );
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/*-----------------------------------------------------------*/
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/* Calculate how many clock increments make up a single tick period. */
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static const uint32_t ulReloadValueForOneTick = ( mainTIMER_FREQUENCY_HZ / configTICK_RATE_HZ );
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/* Will hold the maximum number of ticks that can be suppressed. */
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static uint32_t xMaximumPossibleSuppressedTicks = 0;
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/* Flag set from the tick interrupt to allow the sleep processing to know if
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sleep mode was exited because of a timer interrupt or a different interrupt. */
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static volatile uint32_t ulTickFlag = pdFALSE;
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/* As the clock is only 32KHz, it is likely a value of 1 will be enough. */
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static const uint32_t ulStoppedTimerCompensation = 0UL;
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/*-----------------------------------------------------------*/
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void vPortSetupTimerInterrupt( void )
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{
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RTC_Init_TypeDef xRTCInitStruct;
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const uint32_t ulMAX24BitValue = 0xffffffUL;
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xMaximumPossibleSuppressedTicks = ulMAX24BitValue / ulReloadValueForOneTick;
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/* Configure the RTC to generate the RTOS tick interrupt. */
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/* LXFO setup. For rev D use 70% boost */
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CMU->CTRL = ( CMU->CTRL & ~_CMU_CTRL_LFXOBOOST_MASK ) | CMU_CTRL_LFXOBOOST_70PCENT;
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#if defined( EMU_AUXCTRL_REDLFXOBOOST )
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EMU->AUXCTRL = (EMU->AUXCTRL & ~_EMU_AUXCTRL_REDLFXOBOOST_MASK) | EMU_AUXCTRL_REDLFXOBOOST;
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#endif
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/* Ensure LE modules are accessible. */
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CMU_ClockEnable( cmuClock_CORELE, true );
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/* Use LFXO. */
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CMU_ClockSelectSet( cmuClock_LFA, cmuSelect_LFXO );
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/* Use 8x divider to reduce energy. */
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CMU_ClockDivSet( cmuClock_RTC, cmuClkDiv_8 );
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/* Enable clock to the RTC module. */
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CMU_ClockEnable( cmuClock_RTC, true );
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xRTCInitStruct.enable = false;
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xRTCInitStruct.debugRun = false;
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xRTCInitStruct.comp0Top = true;
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RTC_Init( &xRTCInitStruct );
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/* Disable RTC0 interrupt. */
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RTC_IntDisable( RTC_IFC_COMP0 );
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/* The tick interrupt must be set to the lowest priority possible. */
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NVIC_SetPriority( RTC_IRQn, configKERNEL_INTERRUPT_PRIORITY );
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NVIC_ClearPendingIRQ( RTC_IRQn );
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NVIC_EnableIRQ( RTC_IRQn );
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RTC_CompareSet( 0, ulReloadValueForOneTick );
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RTC_IntClear( RTC_IFC_COMP0 );
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RTC_IntEnable( RTC_IF_COMP0 );
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RTC_Enable( true );
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}
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/*-----------------------------------------------------------*/
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void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime )
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{
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uint32_t ulReloadValue, ulCompleteTickPeriods, ulCurrentCount;
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eSleepModeStatus eSleepAction;
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TickType_t xModifiableIdleTime;
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/* THIS FUNCTION IS CALLED WITH THE SCHEDULER SUSPENDED. */
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/* Make sure the RTC reload value does not overflow the counter. */
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if( xExpectedIdleTime > xMaximumPossibleSuppressedTicks )
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{
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xExpectedIdleTime = xMaximumPossibleSuppressedTicks;
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}
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/* Calculate the reload value required to wait xExpectedIdleTime tick
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periods. */
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ulReloadValue = ulReloadValueForOneTick * xExpectedIdleTime;
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if( ulReloadValue > ulStoppedTimerCompensation )
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{
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/* Compensate for the fact that the RTC is going to be stopped
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momentarily. */
|
||||
ulReloadValue -= ulStoppedTimerCompensation;
|
||||
}
|
||||
|
||||
/* Stop the RTC momentarily. The time the RTC is stopped for is accounted
|
||||
for as best it can be, but using the tickless mode will inevitably result
|
||||
in some tiny drift of the time maintained by the kernel with respect to
|
||||
calendar time. The count is latched before stopping the timer as stopping
|
||||
the timer appears to clear the count. */
|
||||
ulCurrentCount = RTC_CounterGet();
|
||||
RTC_Enable( false );
|
||||
|
||||
/* Enter a critical section but don't use the taskENTER_CRITICAL() method as
|
||||
that will mask interrupts that should exit sleep mode. */
|
||||
INT_Disable();
|
||||
__asm volatile( "dsb" );
|
||||
__asm volatile( "isb" );
|
||||
|
||||
/* The tick flag is set to false before sleeping. If it is true when sleep
|
||||
mode is exited then sleep mode was probably exited because the tick was
|
||||
suppressed for the entire xExpectedIdleTime period. */
|
||||
ulTickFlag = pdFALSE;
|
||||
|
||||
/* If a context switch is pending then abandon the low power entry as the
|
||||
context switch might have been pended by an external interrupt that requires
|
||||
processing. */
|
||||
eSleepAction = eTaskConfirmSleepModeStatus();
|
||||
if( eSleepAction == eAbortSleep )
|
||||
{
|
||||
/* Restart tick and count up to whatever was left of the current time
|
||||
slice. */
|
||||
RTC_CompareSet( 0, ulReloadValueForOneTick - ulCurrentCount );
|
||||
RTC_Enable( true );
|
||||
|
||||
/* Re-enable interrupts - see comments above the cpsid instruction()
|
||||
above. */
|
||||
INT_Enable();
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Adjust the reload value to take into account that the current time
|
||||
slice is already partially complete. */
|
||||
ulReloadValue -= ulCurrentCount;
|
||||
RTC_CompareSet( 0, ulReloadValue );
|
||||
|
||||
/* Restart the RTC. */
|
||||
RTC_Enable( true );
|
||||
|
||||
/* Allow the application to define some pre-sleep processing. */
|
||||
xModifiableIdleTime = xExpectedIdleTime;
|
||||
configPRE_SLEEP_PROCESSING( xModifiableIdleTime );
|
||||
|
||||
/* xExpectedIdleTime being set to 0 by configPRE_SLEEP_PROCESSING()
|
||||
means the application defined code has already executed the WAIT
|
||||
instruction. */
|
||||
if( xModifiableIdleTime > 0 )
|
||||
{
|
||||
__asm volatile( "dsb" );
|
||||
SLEEP_Sleep();
|
||||
__asm volatile( "isb" );
|
||||
}
|
||||
|
||||
/* Allow the application to define some post sleep processing. */
|
||||
configPOST_SLEEP_PROCESSING( xModifiableIdleTime );
|
||||
|
||||
/* Stop RTC. Again, the time the SysTick is stopped for is accounted
|
||||
for as best it can be, but using the tickless mode will inevitably
|
||||
result in some tiny drift of the time maintained by the kernel with
|
||||
respect to calendar time. The count value is latched before stopping
|
||||
the timer as stopping the timer appears to clear the count. */
|
||||
ulCurrentCount = RTC_CounterGet();
|
||||
RTC_Enable( false );
|
||||
|
||||
/* Re-enable interrupts - see comments above the cpsid instruction()
|
||||
above. */
|
||||
INT_Enable();
|
||||
__asm volatile( "dsb" );
|
||||
__asm volatile( "isb" );
|
||||
|
||||
if( ulTickFlag != pdFALSE )
|
||||
{
|
||||
/* The tick interrupt has already executed, although because this
|
||||
function is called with the scheduler suspended the actual tick
|
||||
processing will not occur until after this function has exited.
|
||||
Reset the reload value with whatever remains of this tick period. */
|
||||
ulReloadValue = ulReloadValueForOneTick - ulCurrentCount;
|
||||
RTC_CompareSet( 0, ulReloadValue );
|
||||
|
||||
/* The tick interrupt handler will already have pended the tick
|
||||
processing in the kernel. As the pending tick will be processed as
|
||||
soon as this function exits, the tick value maintained by the tick
|
||||
is stepped forward by one less than the time spent sleeping. The
|
||||
actual stepping of the tick appears later in this function. */
|
||||
ulCompleteTickPeriods = xExpectedIdleTime - 1UL;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Something other than the tick interrupt ended the sleep. How
|
||||
many complete tick periods passed while the processor was
|
||||
sleeping? */
|
||||
ulCompleteTickPeriods = ulCurrentCount / ulReloadValueForOneTick;
|
||||
|
||||
/* The reload value is set to whatever fraction of a single tick
|
||||
period remains. */
|
||||
ulReloadValue = ulCurrentCount - ( ulCompleteTickPeriods * ulReloadValueForOneTick );
|
||||
if( ulReloadValue == 0 )
|
||||
{
|
||||
/* There is no fraction remaining. */
|
||||
ulReloadValue = ulReloadValueForOneTick;
|
||||
ulCompleteTickPeriods++;
|
||||
}
|
||||
|
||||
RTC_CompareSet( 0, ulReloadValue );
|
||||
}
|
||||
|
||||
/* Restart the RTC so it runs up to the alarm value. The alarm value
|
||||
will get set to the value required to generate exactly one tick period
|
||||
the next time the RTC interrupt executes. */
|
||||
RTC_Enable( true );
|
||||
|
||||
/* Wind the tick forward by the number of tick periods that the CPU
|
||||
remained in a low power state. */
|
||||
vTaskStepTick( ulCompleteTickPeriods );
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void RTC_IRQHandler( void )
|
||||
{
|
||||
if( ulTickFlag == pdFALSE )
|
||||
{
|
||||
/* Set RTC interrupt to one RTOS tick period. */
|
||||
RTC_Enable( false );
|
||||
RTC_CompareSet( 0, ulReloadValueForOneTick );
|
||||
ulTickFlag = pdTRUE;
|
||||
RTC_Enable( true );
|
||||
}
|
||||
|
||||
RTC_IntClear( _RTC_IFC_MASK );
|
||||
|
||||
/* Critical section which protect incrementing the tick*/
|
||||
( void ) portSET_INTERRUPT_MASK_FROM_ISR();
|
||||
{
|
||||
if( xTaskIncrementTick() != pdFALSE )
|
||||
{
|
||||
/* Pend a context switch. */
|
||||
portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
|
||||
}
|
||||
}
|
||||
portCLEAR_INTERRUPT_MASK_FROM_ISR( 0 );
|
||||
}
|
||||
|
||||
#endif /* ( configCREATE_LOW_POWER_DEMO == 1 ) */
|
||||
|
||||
|
|
@ -71,9 +71,10 @@
|
|||
* NOTE 1: This project provides two demo applications. A simple blinky demo
|
||||
* that demonstrates tickless low power operation, and a more comprehensive
|
||||
* test and demo application. The configCREATE_LOW_POWER_DEMO setting in
|
||||
* FreeRTOSConfig.h is used to select between the two. See the notes on using
|
||||
* configCREATE_LOW_POWER_DEMO in main.c. This file implements the low power
|
||||
* version.
|
||||
* FreeRTOSConfig.h is used to select between the two, and to select the clock
|
||||
* used when tickless low power operation is demonstrated. See the notes on
|
||||
* using configCREATE_LOW_POWER_DEMO in main.c. This file implements the low
|
||||
* power version.
|
||||
*
|
||||
* NOTE 2: This file only contains the source code that is specific to the
|
||||
* low power demo. Generic functions, such FreeRTOS hook functions, and
|
||||
|
|
@ -211,7 +212,7 @@ const TickType_t xShortDelay = pdMS_TO_TICKS( 10 );
|
|||
if( ulReceivedValue == ulExpectedValue )
|
||||
{
|
||||
/* Turn the LED on for a brief time only so it doens't distort the
|
||||
enerty reading. */
|
||||
energy reading. */
|
||||
BSP_LedSet( mainTASK_LED );
|
||||
vTaskDelay( xShortDelay );
|
||||
BSP_LedClear( mainTASK_LED );
|
||||
|
|
|
|||
|
|
@ -71,10 +71,12 @@
|
|||
* This project provides two demo applications. A simple blinky style project
|
||||
* that demonstrates low power tickless functionality, and a more comprehensive
|
||||
* test and demo application. The configCREATE_LOW_POWER_DEMO setting, which is
|
||||
* defined in FreeRTOSConfig.h, is used to select between the two. The simply
|
||||
* blinky low power demo is implemented and described in main_low_power.c. The
|
||||
* more comprehensive test and demo application is implemented and described in
|
||||
* main_full.c.
|
||||
* defined in FreeRTOSConfig.h, is used to select between the two, and to select
|
||||
* the clock used when demonstrating tickless functionality.
|
||||
*
|
||||
* The simply blinky low power demo is implemented and described in
|
||||
* main_low_power.c. The more comprehensive test and demo application is
|
||||
* implemented and described in main_full.c.
|
||||
*
|
||||
* This file implements the code that is not demo specific, including the
|
||||
* hardware setup and standard FreeRTOS hook functions.
|
||||
|
|
@ -85,6 +87,8 @@
|
|||
*
|
||||
*/
|
||||
|
||||
#warning Check the tick suppression routine in the case where the system unblocks before an entire tick period has expired.
|
||||
|
||||
/* FreeRTOS includes. */
|
||||
#include "FreeRTOS.h"
|
||||
#include "task.h"
|
||||
|
|
@ -132,7 +136,7 @@ int main( void )
|
|||
|
||||
/* The mainCREATE_LOW_POWER_DEMO setting is described at the top
|
||||
of this file. */
|
||||
#if( configCREATE_LOW_POWER_DEMO == 1 )
|
||||
#if( configCREATE_LOW_POWER_DEMO != 0 )
|
||||
{
|
||||
main_low_power();
|
||||
}
|
||||
|
|
@ -154,6 +158,8 @@ static void prvSetupHardware( void )
|
|||
BSP_TraceProfilerSetup();
|
||||
SLEEP_Init( NULL, NULL );
|
||||
BSP_LedsInit();
|
||||
|
||||
SLEEP_SleepBlockBegin( configENERGY_MODE );
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue