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Before changing headers to V6 and changing portLONG, portSHORt and portCHAR to their standard C types.
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Richard Barry
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4417 changed files with 1261274 additions and 0 deletions
158
20091005/Source/portable/WizC/PIC18/Drivers/Tick/Tick.c
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158
20091005/Source/portable/WizC/PIC18/Drivers/Tick/Tick.c
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/*
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FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.
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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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**NOTE** The exception to the GPL is included to allow you to distribute a
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combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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Alternative commercial license and support terms are also available upon
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request. See the licensing section of http://www.FreeRTOS.org for full
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license details.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along
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with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
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Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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***************************************************************************
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* *
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* Looking for a quick start? Then check out the FreeRTOS eBook! *
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* See http://www.FreeRTOS.org/Documentation for details *
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* *
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***************************************************************************
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1 tab == 4 spaces!
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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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 = ( unsigned portCHAR ) ( ( portTIMER_COMPARE_VALUE >> 8 ) & 0xff );
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CCPR1L = ( unsigned portCHAR ) ( 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 = ( unsigned portCHAR ) 0x00;
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TMR1L = ( unsigned portCHAR ) 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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101
20091005/Source/portable/WizC/PIC18/Drivers/Tick/isrTick.c
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101
20091005/Source/portable/WizC/PIC18/Drivers/Tick/isrTick.c
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@ -0,0 +1,101 @@
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/*
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FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.
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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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**NOTE** The exception to the GPL is included to allow you to distribute a
|
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combined work that includes FreeRTOS without being obliged to provide the
|
||||
source code for proprietary components outside of the FreeRTOS kernel.
|
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Alternative commercial license and support terms are also available upon
|
||||
request. See the licensing section of http://www.FreeRTOS.org for full
|
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license details.
|
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|
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
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more details.
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You should have received a copy of the GNU General Public License along
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with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
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Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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***************************************************************************
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* *
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* Looking for a quick start? Then check out the FreeRTOS eBook! *
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* See http://www.FreeRTOS.org/Documentation for details *
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* *
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***************************************************************************
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1 tab == 4 spaces!
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
|
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licensing and training services.
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*/
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/*
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Changes from V3.0.0
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+ ISRcode pulled inline to reduce stack-usage.
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+ Added functionality to only call vTaskSwitchContext() once
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when handling multiple interruptsources in a single interruptcall.
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+ Filename changed to a .c extension to allow stepping through code
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using F7.
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Changes from V3.0.1
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*/
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/*
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* ISR for the tick.
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* This increments the tick count and, if using the preemptive scheduler,
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* performs a context switch. This must be identical to the manual
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* context switch in how it stores the context of a task.
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*/
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#ifndef _FREERTOS_DRIVERS_TICK_ISRTICK_C
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#define _FREERTOS_DRIVERS_TICK_ISRTICK_C
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{
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/*
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* Was the interrupt the SystemClock?
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*/
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if( bCCP1IF && bCCP1IE )
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{
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/*
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* Reset the interrupt flag
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*/
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bCCP1IF = 0;
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/*
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* Maintain the tick count.
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*/
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vTaskIncrementTick();
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#if configUSE_PREEMPTION == 1
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{
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/*
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* Ask for a switch to the highest priority task
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* that is ready to run.
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*/
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uxSwitchRequested = pdTRUE;
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}
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#endif
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}
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}
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#pragma wizcpp uselib "$__PATHNAME__/Tick.c"
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#endif /* _FREERTOS_DRIVERS_TICK_ISRTICK_C */
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