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First version under SVN is V4.0.1
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Richard Barry
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298
Demo/WizNET_DEMO_GCC_ARM7/main.c
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Demo/WizNET_DEMO_GCC_ARM7/main.c
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/*
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FreeRTOS V4.0.1 - copyright (C) 2003-2006 Richard Barry.
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FreeRTOS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FreeRTOS; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes FreeRTOS, without being obliged to provide
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the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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***************************************************************************
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See http://www.FreeRTOS.org for documentation, latest information, license
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and contact details. Please ensure to read the configuration and relevant
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port sections of the online documentation.
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***************************************************************************
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*/
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/*
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NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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The processor MUST be in supervisor mode when vTaskStartScheduler is
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called. The demo applications included in the FreeRTOS.org download switch
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to supervisor mode prior to main being called. If you are not using one of
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these demo application projects then ensure Supervisor mode is used.
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*/
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/*
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* Program entry point.
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*
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* main() is responsible for setting up the microcontroller peripherals, then
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* starting the demo application tasks. Once the tasks have been created the
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* scheduler is started and main() should never complete.
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*
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* The demo creates the three standard 'flash' tasks to provide some visual
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* feedback that the system and scheduler are still operating correctly.
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*
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* The HTTP server task operates at the highest priority so will always preempt
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* the flash or idle task on TCP/IP events.
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*/
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/* Standard includes. */
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#include <stdlib.h>
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/* Scheduler include files. */
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#include "FreeRTOS.h"
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#include "semphr.h"
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#include "task.h"
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/* Application includes. */
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#include "i2c.h"
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#include "HTTP_Serv.h"
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#include "flash.h"
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#include "partest.h"
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#include "dynamic.h"
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#include "semtest.h"
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#include "PollQ.h"
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#include "BlockQ.h"
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#include "integer.h"
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/*-----------------------------------------------------------*/
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/* Constants to setup the PLL. */
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#define mainPLL_MUL_4 ( ( unsigned portCHAR ) 0x0003 )
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#define mainPLL_DIV_1 ( ( unsigned portCHAR ) 0x0000 )
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#define mainPLL_ENABLE ( ( unsigned portCHAR ) 0x0001 )
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#define mainPLL_CONNECT ( ( unsigned portCHAR ) 0x0003 )
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#define mainPLL_FEED_BYTE1 ( ( unsigned portCHAR ) 0xaa )
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#define mainPLL_FEED_BYTE2 ( ( unsigned portCHAR ) 0x55 )
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#define mainPLL_LOCK ( ( unsigned portLONG ) 0x0400 )
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/* Constants to setup the MAM. */
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#define mainMAM_TIM_3 ( ( unsigned portCHAR ) 0x03 )
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#define mainMAM_MODE_FULL ( ( unsigned portCHAR ) 0x02 )
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/* Constants to setup the peripheral bus. */
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#define mainBUS_CLK_FULL ( ( unsigned portCHAR ) 0x01 )
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/* Constants to setup I/O and processor. */
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#define mainBUS_CLK_FULL ( ( unsigned portCHAR ) 0x01 )
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#define mainLED_TO_OUTPUT ( ( unsigned portLONG ) 0xff0000 )
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#define mainJTAG_PORT ( ( unsigned portLONG ) 0x3E0000UL )
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/* Priorities for the demo application tasks. */
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#define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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#define mainHTTP_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainERROR_CHECK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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/* Flash rates of the on board LED to indicate the health of the system. */
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#define mainNO_ERROR_DELAY ( 3000 )
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#define mainERROR_DELAY ( 500 )
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#define mainON_BOARD_LED_BIT ( ( unsigned portLONG ) 0x80 )
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/*-----------------------------------------------------------*/
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/*
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* The Olimex demo board has a single built in LED. This function simply
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* toggles its state.
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*/
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void prvToggleOnBoardLED( void );
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/*
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* Configure the processor for use with the Olimex demo board.
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*/
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static void prvSetupHardware( void );
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/*
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* Simply check for errors and toggle the onboard LED.
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*/
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static void prvErrorChecks( void *pvParameters );
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/*
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* Return true if the demo tasks are executing without error - otherwise
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* return false.
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*/
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static void prvMainCheckOtherTasksAreStillRunning( void );
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/*-----------------------------------------------------------*/
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/* Flag set by prvMainCheckOtherTasksAreStillExecuting(). */
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portLONG lErrorInTask = pdFALSE;
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/*
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* Application entry point:
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* Starts all the other tasks, then starts the scheduler.
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*/
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int main( void )
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{
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/* Setup the hardware for use with the Olimex demo board. */
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prvSetupHardware();
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/* Start the standard flash tasks so the WEB server is not the only thing
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running. */
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vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
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vStartSemaphoreTasks( tskIDLE_PRIORITY );
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vStartDynamicPriorityTasks();
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vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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vStartIntegerMathTasks( tskIDLE_PRIORITY );
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/* Start the WEB server task and the error check task. */
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xTaskCreate( vHTTPServerTask, ( signed portCHAR * ) "HTTP", configMINIMAL_STACK_SIZE, NULL, mainHTTP_TASK_PRIORITY, NULL );
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xTaskCreate( prvErrorChecks, ( signed portCHAR * ) "Check", configMINIMAL_STACK_SIZE, NULL, mainERROR_CHECK_PRIORITY, NULL );
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/* Now all the tasks have been started - start the scheduler.
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NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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The processor MUST be in supervisor mode when vTaskStartScheduler is
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called. The demo applications included in the FreeRTOS.org download switch
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to supervisor mode prior to main being called. If you are not using one of
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these demo application projects then ensure Supervisor mode is used. */
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vTaskStartScheduler();
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/* Should never reach here! */
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return 0;
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}
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/*-----------------------------------------------------------*/
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static void prvSetupHardware( void )
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{
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#ifdef RUN_FROM_RAM
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/* Remap the interrupt vectors to RAM if we are are running from RAM. */
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SCB_MEMMAP = 2;
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#endif
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/* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.
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The JTAG pins are left as input as I'm not sure what will happen if the
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Wiggler is connected after powerup - not that it would be a good idea to
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do that anyway. */
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GPIO_IODIR = ~( mainJTAG_PORT );
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/* Setup the PLL to multiply the XTAL input by 4. */
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SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );
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/* Activate the PLL by turning it on then feeding the correct sequence of
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bytes. */
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SCB_PLLCON = mainPLL_ENABLE;
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SCB_PLLFEED = mainPLL_FEED_BYTE1;
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SCB_PLLFEED = mainPLL_FEED_BYTE2;
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/* Wait for the PLL to lock... */
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while( !( SCB_PLLSTAT & mainPLL_LOCK ) );
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/* ...before connecting it using the feed sequence again. */
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SCB_PLLCON = mainPLL_CONNECT;
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SCB_PLLFEED = mainPLL_FEED_BYTE1;
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SCB_PLLFEED = mainPLL_FEED_BYTE2;
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/* Setup and turn on the MAM. Three cycle access is used due to the fast
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PLL used. It is possible faster overall performance could be obtained by
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tuning the MAM and PLL settings. */
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MAM_TIM = mainMAM_TIM_3;
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MAM_CR = mainMAM_MODE_FULL;
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/* Setup the peripheral bus to be the same as the PLL output. */
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SCB_VPBDIV = mainBUS_CLK_FULL;
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/* Initialise the i2c peripheral. */
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i2cInit();
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/* Initialise the LED's used by the flash tasks. */
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vParTestInitialise();
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}
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/*-----------------------------------------------------------*/
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static void prvMainCheckOtherTasksAreStillRunning( void )
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{
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/* Check all the demo tasks (other than the flash tasks) to ensure
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that they are all still running, and that none of them have detected
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an error. */
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/* This function is called from more than one task. */
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if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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{
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lErrorInTask = pdTRUE;
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}
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if( xArePollingQueuesStillRunning() != pdTRUE )
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{
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lErrorInTask = pdTRUE;
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}
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if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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{
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lErrorInTask = pdTRUE;
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}
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if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
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{
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lErrorInTask = pdTRUE;
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}
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if( xAreBlockingQueuesStillRunning() != pdTRUE )
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{
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lErrorInTask = pdTRUE;
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}
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}
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/*-----------------------------------------------------------*/
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void prvToggleOnBoardLED( void )
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{
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unsigned portLONG ulState;
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ulState = GPIO0_IOPIN;
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if( ulState & mainON_BOARD_LED_BIT )
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{
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GPIO_IOCLR = mainON_BOARD_LED_BIT;
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}
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else
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{
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GPIO_IOSET = mainON_BOARD_LED_BIT;
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}
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}
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/*-----------------------------------------------------------*/
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static void prvErrorChecks( void *pvParameters )
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{
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portTickType xDelay = mainNO_ERROR_DELAY;
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/* The parameters are not used. */
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( void ) pvParameters;
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for( ;; )
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{
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/* How long we delay depends on whether an error has been detected
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or not. Therefore the flash rate of the on board LED indicates
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whether or not an error has occurred. */
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vTaskDelay( xDelay );
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/* Update the lErrorInTask flag. */
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prvMainCheckOtherTasksAreStillRunning();
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if( lErrorInTask )
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{
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/* An error has been found so reduce the delay period and in so
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doing speed up the flash rate of the on board LED. */
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xDelay = mainERROR_DELAY;
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}
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prvToggleOnBoardLED();
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}
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}
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