First version under SVN is V4.0.1

2025-08-19 09:38:32 -04:00 · 2006-05-02 09:39:15 +00:00 · 2006-05-02 09:39:15 +00:00 · b6df57c7e3
commit b6df57c7e3
parent 243393860c
918 changed files with 269038 additions and 0 deletions
--- a/Source/portable/WizC/PIC18/Drivers/Tick/Tick.c
+++ b/Source/portable/WizC/PIC18/Drivers/Tick/Tick.c
@ -0,0 +1,143 @@
+/*
+	FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
+
+	This file is part of the FreeRTOS distribution.
+
+	FreeRTOS is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	FreeRTOS is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with FreeRTOS; if not, write to the Free Software
+	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+	A special exception to the GPL can be applied should you wish to distribute
+	a combined work that includes FreeRTOS, without being obliged to provide
+	the source code for any proprietary components.  See the licensing section 
+	of http://www.FreeRTOS.org for full details of how and when the exception
+	can be applied.
+
+	***************************************************************************
+	See http://www.FreeRTOS.org for documentation, latest information, license 
+	and contact details.  Please ensure to read the configuration and relevant 
+	port sections of the online documentation.
+	***************************************************************************
+*/
+
+/* 
+Changes from V3.0.0
+	+ ISRcode is pulled inline and portTICKisr() is therefore
+	  deleted from this file.
+
+	+ Prescaler logic for Timer1 added to allow for a wider
+	  range of TickRates.
+
+Changes from V3.0.1
+*/
+
+#include <FreeRTOS.h>
+#include <task.h>
+
+/* IO port constants. */
+#define portBIT_SET		(1)
+#define portBIT_CLEAR	(0)
+
+/* 
+ * Hardware setup for the tick.
+ * We use a compare match on timer1. Depending on MPU-frequency
+ * and requested tickrate, a prescaled value with a matching
+ * prescaler are determined.
+ */
+#define	portTIMER_COMPARE_BASE			((APROCFREQ/4)/configTICK_RATE_HZ)
+
+#if portTIMER_COMPARE_BASE   < 0x10000
+	#define	portTIMER_COMPARE_VALUE		(portTIMER_COMPARE_BASE)
+	#define portTIMER_COMPARE_PS1		(portBIT_CLEAR)
+	#define portTIMER_COMPARE_PS0		(portBIT_CLEAR)
+#elif portTIMER_COMPARE_BASE < 0x20000
+	#define	portTIMER_COMPARE_VALUE		(portTIMER_COMPARE_BASE / 2)
+	#define portTIMER_COMPARE_PS1		(portBIT_CLEAR)
+	#define portTIMER_COMPARE_PS0		(portBIT_SET)
+#elif portTIMER_COMPARE_BASE < 0x40000
+	#define	portTIMER_COMPARE_VALUE		(portTIMER_COMPARE_BASE / 4)
+	#define portTIMER_COMPARE_PS1		(portBIT_SET)
+	#define portTIMER_COMPARE_PS0		(portBIT_CLEAR)
+#elif portTIMER_COMPARE_BASE < 0x80000
+	#define	portTIMER_COMPARE_VALUE		(portTIMER_COMPARE_BASE / 8)
+	#define portTIMER_COMPARE_PS1		(portBIT_SET)
+	#define portTIMER_COMPARE_PS0		(portBIT_SET)
+#else
+	#error "TickRate out of range"
+#endif
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Setup a timer for a regular tick.
+ */
+void portSetupTick( void )
+{
+	/*
+	 * Interrupts are disabled when this function is called.
+	 */
+
+	/*
+	 * Setup CCP1
+	 * Provide the tick interrupt using a compare match on timer1.
+	 */
+
+	/*
+	 * Set the compare match value.
+	 */
+	CCPR1H = ( unsigned portCHAR ) ( ( portTIMER_COMPARE_VALUE >> 8 ) & 0xff );
+	CCPR1L = ( unsigned portCHAR )   ( portTIMER_COMPARE_VALUE & 0xff );
+
+	/*
+	 * Set Compare Special Event Trigger Mode
+	 */
+	bCCP1M3 	= portBIT_SET;
+	bCCP1M2 	= portBIT_CLEAR;
+	bCCP1M1 	= portBIT_SET;
+	bCCP1M0		= portBIT_SET;
+
+	/*
+	 * Enable CCP1 interrupt
+	 */
+	bCCP1IE 	= portBIT_SET;
+
+	/*
+	 * We are only going to use the global interrupt bit, so disable
+	 * interruptpriorities and enable peripheral interrupts.
+	 */
+	bIPEN		= portBIT_CLEAR;
+	bPEIE		= portBIT_SET;
+
+	/*
+	 * Set up timer1
+	 * It will produce the system tick.
+	 */
+
+	/*
+	 * Clear the time count
+	 */
+	TMR1H = ( unsigned portCHAR ) 0x00;
+	TMR1L = ( unsigned portCHAR ) 0x00;
+
+	/*
+	 * Setup the timer
+	 */
+	bRD16		= portBIT_SET;				// 16-bit
+	bT1CKPS1	= portTIMER_COMPARE_PS1;	// prescaler
+	bT1CKPS0	= portTIMER_COMPARE_PS0;	// prescaler
+	bT1OSCEN	= portBIT_SET;				// Oscillator enable
+	bT1SYNC		= portBIT_SET;				// No external clock sync
+	bTMR1CS		= portBIT_CLEAR;			// Internal clock
+	
+	bTMR1ON		= portBIT_SET;				// Start timer1
+}