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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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989bc332b2
* Add XMOS XCore ports Some minor modifications are also made to the kernel to support the XCore compiler's automatic stack size calculation. * Update kernel to support SMP The XMOS XCore ports are also updated to support SMP. * Fix compiler warnings in xcore ports The port set and clear interrupt mask from ISR macros were removed from the ports so that the default macros found in FreeRTOS.h are used instead. The default macros do not result in warnings when they are used. * Remove inline function from timers.h Inline function converted to macro. This should now build when optimizations are off and inlining is disabled. * Fix compiler warnings in xcore ports and tasks.c * fixed documentation for ulTaskNotifyTake() and ulTaskNotifyTakeIndexed() * spelling fixes for tasks.c Co-authored-by: Michael Bruno <mikeb@xmos.com>
139 lines
4 KiB
C
139 lines
4 KiB
C
/*
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* FreeRTOS Kernel V10.4.3
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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* 1 tab == 4 spaces!
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*/
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/*
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Changes from V3.0.0
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+ ISRcode is pulled inline and portTICKisr() is therefore
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deleted from this file.
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+ Prescaler logic for Timer1 added to allow for a wider
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range of TickRates.
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Changes from V3.0.1
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*/
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#include <FreeRTOS.h>
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#include <task.h>
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/* IO port constants. */
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#define portBIT_SET (1)
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#define portBIT_CLEAR (0)
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/*
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* Hardware setup for the tick.
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* We use a compare match on timer1. Depending on MPU-frequency
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* and requested tickrate, a prescaled value with a matching
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* prescaler are determined.
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*/
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#define portTIMER_COMPARE_BASE ((APROCFREQ/4)/configTICK_RATE_HZ)
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#if portTIMER_COMPARE_BASE < 0x10000
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#define portTIMER_COMPARE_VALUE (portTIMER_COMPARE_BASE)
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#define portTIMER_COMPARE_PS1 (portBIT_CLEAR)
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#define portTIMER_COMPARE_PS0 (portBIT_CLEAR)
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#elif portTIMER_COMPARE_BASE < 0x20000
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#define portTIMER_COMPARE_VALUE (portTIMER_COMPARE_BASE / 2)
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#define portTIMER_COMPARE_PS1 (portBIT_CLEAR)
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#define portTIMER_COMPARE_PS0 (portBIT_SET)
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#elif portTIMER_COMPARE_BASE < 0x40000
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#define portTIMER_COMPARE_VALUE (portTIMER_COMPARE_BASE / 4)
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#define portTIMER_COMPARE_PS1 (portBIT_SET)
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#define portTIMER_COMPARE_PS0 (portBIT_CLEAR)
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#elif portTIMER_COMPARE_BASE < 0x80000
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#define portTIMER_COMPARE_VALUE (portTIMER_COMPARE_BASE / 8)
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#define portTIMER_COMPARE_PS1 (portBIT_SET)
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#define portTIMER_COMPARE_PS0 (portBIT_SET)
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#else
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#error "TickRate out of range"
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#endif
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/*-----------------------------------------------------------*/
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/*
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* Setup a timer for a regular tick.
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*/
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void portSetupTick( void )
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{
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/*
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* Interrupts are disabled when this function is called.
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*/
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/*
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* Setup CCP1
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* Provide the tick interrupt using a compare match on timer1.
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*/
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/*
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* Set the compare match value.
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*/
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CCPR1H = ( uint8_t ) ( ( portTIMER_COMPARE_VALUE >> 8 ) & 0xff );
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CCPR1L = ( uint8_t ) ( portTIMER_COMPARE_VALUE & 0xff );
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/*
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* Set Compare Special Event Trigger Mode
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*/
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bCCP1M3 = portBIT_SET;
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bCCP1M2 = portBIT_CLEAR;
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bCCP1M1 = portBIT_SET;
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bCCP1M0 = portBIT_SET;
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/*
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* Enable CCP1 interrupt
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*/
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bCCP1IE = portBIT_SET;
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/*
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* We are only going to use the global interrupt bit, so disable
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* interruptpriorities and enable peripheral interrupts.
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*/
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bIPEN = portBIT_CLEAR;
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bPEIE = portBIT_SET;
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/*
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* Set up timer1
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* It will produce the system tick.
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*/
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/*
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* Clear the time count
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*/
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TMR1H = ( uint8_t ) 0x00;
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TMR1L = ( uint8_t ) 0x00;
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/*
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* Setup the timer
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*/
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bRD16 = portBIT_SET; // 16-bit
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bT1CKPS1 = portTIMER_COMPARE_PS1; // prescaler
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bT1CKPS0 = portTIMER_COMPARE_PS0; // prescaler
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bT1OSCEN = portBIT_SET; // Oscillator enable
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bT1SYNC = portBIT_SET; // No external clock sync
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bTMR1CS = portBIT_CLEAR; // Internal clock
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bTMR1ON = portBIT_SET; // Start timer1
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}
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