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/*
FreeRTOS.org V5.1.1 - Copyright (C) 2003-2008 Richard Barry.
This file is part of the FreeRTOS.org distribution.
FreeRTOS.org 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.org 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.org; 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.org, 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.
***************************************************************************
***************************************************************************
* *
* SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
* and even write all or part of your application on your behalf. *
* See http://www.OpenRTOS.com for details of the services we provide to *
* expedite your project. *
* *
***************************************************************************
***************************************************************************
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
/*
Changes from V3.0.0
Changes from V3.0.1
*/
/*
* Instead of the normal single demo application, the PIC18F demo is split
* into several smaller programs of which this is the first. This enables the
* demo's to be executed on the RAM limited PIC-devices.
*
* The Demo1 project is configured for a PIC18F4620 device. Main.c starts 9
* tasks (including the idle task).
* This first demo is included to do a quick check on the FreeRTOS
* installation. It is also included to demonstrate a minimal project-setup
* to use FreeRTOS in a wizC environment.
*
* Eight independant tasks are created. All tasks share the same taskcode.
* Each task blinks a different led on portB. The blinkrate for each task
* is different, but chosen in such a way that portB will show a binary
* counter pattern. All blinkrates are derived from a single master-rate.
* By default, this masterrate is set to 100 milliseconds. Although such
* a low value will make it almost impossible to see some of the leds
* actually blink, it is a good value when using the wizC-simulator.
* When testing on a real chip, changing the value to eg. 500 milliseconds
* would be appropiate.
*/
/* Scheduler include files. */
#include <FreeRTOS.h>
#include <task.h>
#define mainBLINK_LED_INTERVAL ( ( portTickType ) 100 / ( portTICK_RATE_MS ) )
/* The LED that is flashed by the B0 task. */
#define mainBLINK_LED0_PORT LATD
#define mainBLINK_LED0_TRIS TRISD
#define mainBLINK_LED0_PIN 0
#define mainBLINK_LED0_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED0_PIN))
/* The LED that is flashed by the B1 task. */
#define mainBLINK_LED1_PORT LATD
#define mainBLINK_LED1_TRIS TRISD
#define mainBLINK_LED1_PIN 1
#define mainBLINK_LED1_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED1_PIN))
/* The LED that is flashed by the B2 task. */
#define mainBLINK_LED2_PORT LATD
#define mainBLINK_LED2_TRIS TRISD
#define mainBLINK_LED2_PIN 2
#define mainBLINK_LED2_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED2_PIN))
/* The LED that is flashed by the B3 task. */
#define mainBLINK_LED3_PORT LATD
#define mainBLINK_LED3_TRIS TRISD
#define mainBLINK_LED3_PIN 3
#define mainBLINK_LED3_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED3_PIN))
/* The LED that is flashed by the B4 task. */
#define mainBLINK_LED4_PORT LATD
#define mainBLINK_LED4_TRIS TRISD
#define mainBLINK_LED4_PIN 4
#define mainBLINK_LED4_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED4_PIN))
/* The LED that is flashed by the B5 task. */
#define mainBLINK_LED5_PORT LATD
#define mainBLINK_LED5_TRIS TRISD
#define mainBLINK_LED5_PIN 5
#define mainBLINK_LED5_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED5_PIN))
/* The LED that is flashed by the B6 task. */
#define mainBLINK_LED6_PORT LATD
#define mainBLINK_LED6_TRIS TRISD
#define mainBLINK_LED6_PIN 6
#define mainBLINK_LED6_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED6_PIN))
/* The LED that is flashed by the B7 task. */
#define mainBLINK_LED7_PORT LATD
#define mainBLINK_LED7_TRIS TRISD
#define mainBLINK_LED7_PIN 7
#define mainBLINK_LED7_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED7_PIN))
typedef struct {
unsigned char *port;
unsigned char *tris;
unsigned char pin;
portTickType interval;
} SBLINK;
const SBLINK sled0 = {&mainBLINK_LED0_PORT, &mainBLINK_LED0_TRIS, mainBLINK_LED0_PIN, mainBLINK_LED0_INTERVAL};
const SBLINK sled1 = {&mainBLINK_LED1_PORT, &mainBLINK_LED1_TRIS, mainBLINK_LED1_PIN, mainBLINK_LED1_INTERVAL};
const SBLINK sled2 = {&mainBLINK_LED2_PORT, &mainBLINK_LED2_TRIS, mainBLINK_LED2_PIN, mainBLINK_LED2_INTERVAL};
const SBLINK sled3 = {&mainBLINK_LED3_PORT, &mainBLINK_LED3_TRIS, mainBLINK_LED3_PIN, mainBLINK_LED3_INTERVAL};
const SBLINK sled4 = {&mainBLINK_LED4_PORT, &mainBLINK_LED4_TRIS, mainBLINK_LED4_PIN, mainBLINK_LED4_INTERVAL};
const SBLINK sled5 = {&mainBLINK_LED5_PORT, &mainBLINK_LED5_TRIS, mainBLINK_LED5_PIN, mainBLINK_LED5_INTERVAL};
const SBLINK sled6 = {&mainBLINK_LED6_PORT, &mainBLINK_LED6_TRIS, mainBLINK_LED6_PIN, mainBLINK_LED6_INTERVAL};
const SBLINK sled7 = {&mainBLINK_LED7_PORT, &mainBLINK_LED7_TRIS, mainBLINK_LED7_PIN, mainBLINK_LED7_INTERVAL};
/*
* The task code for the "vBlink" task.
*/
static portTASK_FUNCTION_PROTO(vBlink, pvParameters);
/*-----------------------------------------------------------*/
/*
* Creates the tasks, then starts the scheduler.
*/
void main( void )
{
/*
* Start the blink tasks defined in this file.
*/
xTaskCreate( vBlink, "B0", configMINIMAL_STACK_SIZE, &sled0, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B1", configMINIMAL_STACK_SIZE, &sled1, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B2", configMINIMAL_STACK_SIZE, &sled2, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B3", configMINIMAL_STACK_SIZE, &sled3, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B4", configMINIMAL_STACK_SIZE, &sled4, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B5", configMINIMAL_STACK_SIZE, &sled5, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B6", configMINIMAL_STACK_SIZE, &sled6, tskIDLE_PRIORITY, NULL );
xTaskCreate( vBlink, "B7", configMINIMAL_STACK_SIZE, &sled7, tskIDLE_PRIORITY, NULL );
/*
* Start the scheduler.
*/
vTaskStartScheduler( );
while(1) /* This point should never be reached. */
{
}
}
/*-----------------------------------------------------------*/
static portTASK_FUNCTION(vBlink, pvParameters)
{
unsigned char *Port = ((SBLINK *)pvParameters)->port;
unsigned char *Tris = ((SBLINK *)pvParameters)->tris;
unsigned char Pin = ((SBLINK *)pvParameters)->pin;
portTickType Interval = ((SBLINK *)pvParameters)->interval;
portTickType xLastWakeTime;
/*
* Initialize the hardware
*/
*Tris &= ~(1<<Pin); // Set the pin that is used by this task to ouput
*Port &= ~(1<<Pin); // Drive the pin low
/*
* Initialise the xLastWakeTime variable with the current time.
*/
xLastWakeTime = xTaskGetTickCount();
/*
* Cycle for ever, delaying then toggle the LED.
*/
for( ;; )
{
/*
* Wait until it is time to toggle
*/
vTaskDelayUntil( &xLastWakeTime, Interval );
/*
* Toggle the LED for visual feedback.
*/
*Port ^= 1<<Pin;
}
}
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