/*\r
- FreeRTOS V9.0.0rc1 - Copyright (C) 2016 Real Time Engineers Ltd.\r
- All rights reserved\r
-\r
- VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
-\r
- This file is part of the FreeRTOS distribution.\r
-\r
- FreeRTOS is free software; you can redistribute it and/or modify it under\r
- the terms of the GNU General Public License (version 2) as published by the\r
- Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.\r
-\r
- ***************************************************************************\r
- >>! NOTE: The modification to the GPL is included to allow you to !<<\r
- >>! distribute a combined work that includes FreeRTOS without being !<<\r
- >>! obliged to provide the source code for proprietary components !<<\r
- >>! outside of the FreeRTOS kernel. !<<\r
- ***************************************************************************\r
-\r
- FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
- FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
- link: http://www.freertos.org/a00114.html\r
-\r
- ***************************************************************************\r
- * *\r
- * FreeRTOS provides completely free yet professionally developed, *\r
- * robust, strictly quality controlled, supported, and cross *\r
- * platform software that is more than just the market leader, it *\r
- * is the industry's de facto standard. *\r
- * *\r
- * Help yourself get started quickly while simultaneously helping *\r
- * to support the FreeRTOS project by purchasing a FreeRTOS *\r
- * tutorial book, reference manual, or both: *\r
- * http://www.FreeRTOS.org/Documentation *\r
- * *\r
- ***************************************************************************\r
-\r
- http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
- the FAQ page "My application does not run, what could be wrong?". Have you\r
- defined configASSERT()?\r
-\r
- http://www.FreeRTOS.org/support - In return for receiving this top quality\r
- embedded software for free we request you assist our global community by\r
- participating in the support forum.\r
-\r
- http://www.FreeRTOS.org/training - Investing in training allows your team to\r
- be as productive as possible as early as possible. Now you can receive\r
- FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
- Ltd, and the world's leading authority on the world's leading RTOS.\r
-\r
- http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
- including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
- compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
-\r
- http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
- Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
-\r
- http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
- Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
- licenses offer ticketed support, indemnification and commercial middleware.\r
-\r
- http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
- engineered and independently SIL3 certified version for use in safety and\r
- mission critical applications that require provable dependability.\r
-\r
- 1 tab == 4 spaces!\r
-*/\r
+ * FreeRTOS Kernel V10.3.0\r
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
+ *\r
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of\r
+ * this software and associated documentation files (the "Software"), to deal in\r
+ * the Software without restriction, including without limitation the rights to\r
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of\r
+ * the Software, and to permit persons to whom the Software is furnished to do so,\r
+ * subject to the following conditions:\r
+ *\r
+ * The above copyright notice and this permission notice shall be included in all\r
+ * copies or substantial portions of the Software.\r
+ *\r
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS\r
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR\r
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+ *\r
+ * http://www.FreeRTOS.org\r
+ * http://aws.amazon.com/freertos\r
+ *\r
+ * 1 tab == 4 spaces!\r
+ */\r
\r
/* Standard inlcludes. */\r
#include <limits.h>\r
#include "em_rtcc.h"\r
#include "em_rmu.h"\r
#include "em_int.h"\r
+#include "em_letimer.h"\r
#include "sleep.h"\r
\r
/* SEE THE COMMENTS ABOVE THE DEFINITION OF configCREATE_LOW_POWER_DEMO IN\r
is being built. */\r
#if( configCREATE_LOW_POWER_DEMO == 1 )\r
\r
+/* When lpUSE_TEST_TIMER is 1 a second timer will be used to bring the MCU out\r
+of its low power state before the expected idle time has completed. This is\r
+done purely for test coverage purposes. */\r
+#define lpUSE_TEST_TIMER ( 0 )\r
+\r
/* The RTCC channel used to generate the tick interrupt. */\r
#define lpRTCC_CHANNEL ( 1 )\r
\r
NVIC_EnableIRQ( RTCC_IRQn );\r
RTCC_IntEnable( RTCC_IEN_CC1 );\r
RTCC_Enable( true );\r
+\r
+ #if( lpUSE_TEST_TIMER == 1 )\r
+ {\r
+ void prvSetupTestTimer( void );\r
+\r
+ /* A second timer is used to test the path where the MCU is brought out\r
+ of a low power state by a timer other than the tick timer. */\r
+ prvSetupTestTimer();\r
+ }\r
+ #endif\r
}\r
/*-----------------------------------------------------------*/\r
\r
void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime )\r
{\r
-uint32_t ulReloadValue, ulCompleteTickPeriods, ulCountBeforeSleep, ulCountAfterSleep;\r
+uint32_t ulReloadValue, ulCompleteTickPeriods, ulCountAfterSleep;\r
eSleepModeStatus eSleepAction;\r
TickType_t xModifiableIdleTime;\r
\r
/* Stop the RTC momentarily. The time the RTC is stopped for is accounted\r
for as best it can be, but using the tickless mode will inevitably result\r
in some tiny drift of the time maintained by the kernel with respect to\r
- calendar time. The count is latched before stopping the timer as stopping\r
- the timer appears to clear the count. */\r
- ulCountBeforeSleep = RTCC_CounterGet();\r
+ calendar time. */\r
RTCC_Enable( false );\r
\r
- /* If this function is re-entered before one complete tick period then the\r
- reload value might be set to take into account a partial time slice, but\r
- just reading the count assumes it is counting up to a full ticks worth - so\r
- add in the difference if any. */\r
- ulCountBeforeSleep += ( ulReloadValueForOneTick - RTCC_ChannelCCVGet( lpRTCC_CHANNEL ) );\r
-\r
/* Enter a critical section but don't use the taskENTER_CRITICAL() method as\r
that will mask interrupts that should exit sleep mode. */\r
INT_Disable();\r
eSleepAction = eTaskConfirmSleepModeStatus();\r
if( eSleepAction == eAbortSleep )\r
{\r
- /* Restart tick and count up to whatever was left of the current time\r
+ /* Restart tick and continue counting to complete the current time\r
slice. */\r
- RTCC_ChannelCCVSet( lpRTCC_CHANNEL, ( ulReloadValueForOneTick - ulCountBeforeSleep ) + ulStoppedTimerCompensation );\r
RTCC_Enable( true );\r
\r
- /* Re-enable interrupts - see comments above the cpsid instruction()\r
+ /* Re-enable interrupts - see comments above the RTCC_Enable() call\r
above. */\r
INT_Enable();\r
}\r
else\r
{\r
- /* Adjust the reload value to take into account that the current time\r
- slice is already partially complete. */\r
- ulReloadValue -= ulCountBeforeSleep;\r
RTCC_ChannelCCVSet( lpRTCC_CHANNEL, ulReloadValue );\r
\r
/* Restart the RTC. */\r
/* Stop RTC. Again, the time the SysTick is stopped for is accounted\r
for as best it can be, but using the tickless mode will inevitably\r
result in some tiny drift of the time maintained by the kernel with\r
- respect to calendar time. The count value is latched before stopping\r
- the timer as stopping the timer appears to clear the count. */\r
- ulCountAfterSleep = RTCC_CounterGet();\r
+ respect to calendar time. */\r
RTCC_Enable( false );\r
+ ulCountAfterSleep = RTCC_CounterGet();\r
\r
- /* Re-enable interrupts - see comments above the cpsid instruction()\r
+ /* Re-enable interrupts - see comments above the INT_Enable() call\r
above. */\r
INT_Enable();\r
__asm volatile( "dsb" );\r
/* The tick interrupt has already executed, although because this\r
function is called with the scheduler suspended the actual tick\r
processing will not occur until after this function has exited.\r
- Reset the reload value with whatever remains of this tick period. */\r
- ulReloadValue = ulReloadValueForOneTick - ulCountAfterSleep;\r
- RTCC_ChannelCCVSet( lpRTCC_CHANNEL, ulReloadValue );\r
-\r
- /* The tick interrupt handler will already have pended the tick\r
+ The tick interrupt handler will already have pended the tick\r
processing in the kernel. As the pending tick will be processed as\r
soon as this function exits, the tick value maintained by the tick\r
is stepped forward by one less than the time spent sleeping. The\r
actual stepping of the tick appears later in this function. */\r
ulCompleteTickPeriods = xExpectedIdleTime - 1UL;\r
+\r
+ /* The interrupt should have reset the CCV value. */\r
+ configASSERT( RTCC_ChannelCCVGet( lpRTCC_CHANNEL ) == ulReloadValueForOneTick );\r
}\r
else\r
{\r
/* Something other than the tick interrupt ended the sleep. How\r
many complete tick periods passed while the processor was\r
- sleeping? Add back in the adjustment that was made to the reload\r
- value to account for the fact that a time slice was part way through\r
- when this function was called. */\r
- ulCountAfterSleep += ulCountBeforeSleep;\r
+ sleeping? */\r
ulCompleteTickPeriods = ulCountAfterSleep / ulReloadValueForOneTick;\r
\r
- /* The reload value is set to whatever fraction of a single tick\r
- period remains. */\r
- ulCountAfterSleep -= ( ulCompleteTickPeriods * ulReloadValueForOneTick );\r
- ulReloadValue = ulReloadValueForOneTick - ulCountAfterSleep;\r
-\r
- if( ulReloadValue == 0 )\r
- {\r
- /* There is no fraction remaining. */\r
- ulReloadValue = ulReloadValueForOneTick;\r
- ulCompleteTickPeriods++;\r
- }\r
-\r
- RTCC_ChannelCCVSet( lpRTCC_CHANNEL, ulReloadValue );\r
+ /* The next interrupt is configured to occur at whatever fraction of\r
+ the current tick period remains by setting the reload value back to\r
+ that required for one tick, and truncating the count to remove the\r
+ counts that are greater than the reload value. */\r
+ RTCC_ChannelCCVSet( lpRTCC_CHANNEL, ulReloadValueForOneTick );\r
+ ulCountAfterSleep %= ulReloadValueForOneTick;\r
+ RTCC_CounterSet( ulCountAfterSleep );\r
}\r
\r
/* Restart the RTC so it runs up to the alarm value. The alarm value\r
}\r
/*-----------------------------------------------------------*/\r
\r
+#if( lpUSE_TEST_TIMER == 1 )\r
+\r
+ /* Juse used to ensure the second timer is executing. */\r
+ volatile uint32_t ulLETimerIncrements = 0;\r
+\r
+ void LETIMER0_IRQHandler( void )\r
+ {\r
+ /* This ISR is used purely to bring the MCU out of sleep mode - it has\r
+ no other purpose. */\r
+ ulLETimerIncrements++;\r
+ LETIMER_IntClear( LETIMER0, LETIMER_IF_COMP0 );\r
+ }\r
+\r
+#endif /* lpUSE_TEST_TIMER == 1 */\r
+/*-----------------------------------------------------------*/\r
+\r
+#if( lpUSE_TEST_TIMER == 1 )\r
+\r
+ /* Set up a timer that used used to bring the MCU out of sleep mode using\r
+ an interrupt other than the tick interrupt. This is done for code coverage\r
+ puposes only. */\r
+ void prvSetupTestTimer( void )\r
+ {\r
+ static const LETIMER_Init_TypeDef xLETimerInitStruct =\r
+ {\r
+ true, /* Enable timer when init complete. */\r
+ false, /* Stop counter during debug halt. */\r
+ true, /* Load COMP0 into CNT on underflow. */\r
+ false, /* Do not load COMP1 into COMP0 when REP0 reaches 0. */\r
+ 0, /* Idle value 0 for output 0. */\r
+ 0, /* Idle value 0 for output 1. */\r
+ letimerUFOANone, /* No action on underflow on output 0. */\r
+ letimerUFOANone, /* No action on underflow on output 1. */\r
+ letimerRepeatFree /* Count until stopped by SW. */\r
+ };\r
+ const uint32_t ulCompareMatch = 32768UL / 10UL;\r
+\r
+ CMU_ClockSelectSet( cmuClock_LFA, cmuSelect_LFXO );\r
+ CMU_ClockEnable( cmuClock_LETIMER0, true );\r
+\r
+ LETIMER_CompareSet( LETIMER0, 0, ulCompareMatch );\r
+ LETIMER_IntEnable( LETIMER0, LETIMER_IF_COMP0 );\r
+ NVIC_EnableIRQ( LETIMER0_IRQn );\r
+ LETIMER_Init( LETIMER0, &xLETimerInitStruct);\r
+ }\r
+\r
+#endif /* lpUSE_TEST_TIMER == 1 */\r
+\r
+\r
+\r
+\r
#endif /* ( configCREATE_LOW_POWER_DEMO == 1 ) */\r
projects / freertos / blobdiff