2 FreeRTOS.org V5.2.0 - Copyright (C) 2003-2009 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License (version 2) as published
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8 by the Free Software Foundation and modified by the FreeRTOS exception.
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10 FreeRTOS.org is distributed in the hope that it will be useful, but WITHOUT
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11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 You should have received a copy of the GNU General Public License along
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16 with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59
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17 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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19 A special exception to the GPL is included to allow you to distribute a
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20 combined work that includes FreeRTOS.org without being obliged to provide
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21 the source code for any proprietary components. See the licensing section
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22 of http://www.FreeRTOS.org for full details.
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25 ***************************************************************************
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27 * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
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29 * This is a concise, step by step, 'hands on' guide that describes both *
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30 * general multitasking concepts and FreeRTOS specifics. It presents and *
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31 * explains numerous examples that are written using the FreeRTOS API. *
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32 * Full source code for all the examples is provided in an accompanying *
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35 ***************************************************************************
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39 Please ensure to read the configuration and relevant port sections of the
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40 online documentation.
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42 http://www.FreeRTOS.org - Documentation, latest information, license and
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45 http://www.SafeRTOS.com - A version that is certified for use in safety
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48 http://www.OpenRTOS.com - Commercial support, development, porting,
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49 licensing and training services.
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52 /* Scheduler includes. */
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53 #include "FreeRTOS.h"
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55 /* Demo includes. */
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56 #include "IntQueueTimer.h"
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57 #include "IntQueue.h"
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59 /* Library includes. */
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60 #include "hw_ints.h"
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61 #include "hw_memmap.h"
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62 #include "hw_types.h"
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63 #include "interrupt.h"
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65 #include "lmi_timer.h"
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67 #define tmrTIMER_2_FREQUENCY ( 2000UL )
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68 #define tmrTIMER_3_FREQUENCY ( 2001UL )
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70 void vInitialiseTimerForIntQueueTest( void )
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72 unsigned long ulFrequency;
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74 /* Timer 2 and 3 are utilised for this test. */
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75 SysCtlPeripheralEnable( SYSCTL_PERIPH_TIMER2 );
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76 SysCtlPeripheralEnable( SYSCTL_PERIPH_TIMER3 );
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77 TimerConfigure( TIMER2_BASE, TIMER_CFG_32_BIT_PER );
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78 TimerConfigure( TIMER3_BASE, TIMER_CFG_32_BIT_PER );
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80 /* Set the timer interrupts to be above the kernel. The interrupts are
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81 assigned different priorities so they nest with each other. */
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82 IntPrioritySet( INT_TIMER2A, configMAX_SYSCALL_INTERRUPT_PRIORITY + ( 1 << 5 ) ); /* Shift left 5 as only the top 3 bits are implemented. */
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83 IntPrioritySet( INT_TIMER3A, configMAX_SYSCALL_INTERRUPT_PRIORITY );
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85 /* Ensure interrupts do not start until the scheduler is running. */
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86 portDISABLE_INTERRUPTS();
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88 /* The rate at which the timers will interrupt. */
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89 ulFrequency = configCPU_CLOCK_HZ / tmrTIMER_2_FREQUENCY;
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90 TimerLoadSet( TIMER2_BASE, TIMER_A, ulFrequency );
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91 IntEnable( INT_TIMER2A );
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92 TimerIntEnable( TIMER2_BASE, TIMER_TIMA_TIMEOUT );
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94 /* The rate at which the timers will interrupt. */
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95 ulFrequency = configCPU_CLOCK_HZ / tmrTIMER_3_FREQUENCY;
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96 TimerLoadSet( TIMER3_BASE, TIMER_A, ulFrequency );
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97 IntEnable( INT_TIMER3A );
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98 TimerIntEnable( TIMER3_BASE, TIMER_TIMA_TIMEOUT );
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100 /* Enable both timers. */
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101 TimerEnable( TIMER2_BASE, TIMER_A );
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102 TimerEnable( TIMER3_BASE, TIMER_A );
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104 /*-----------------------------------------------------------*/
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106 void vT2InterruptHandler( void )
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108 TimerIntClear( TIMER2_BASE, TIMER_TIMA_TIMEOUT );
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109 portEND_SWITCHING_ISR( xFirstTimerHandler() );
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111 /*-----------------------------------------------------------*/
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113 void vT3InterruptHandler( void )
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115 TimerIntClear( TIMER3_BASE, TIMER_TIMA_TIMEOUT );
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116 portEND_SWITCHING_ISR( xSecondTimerHandler() );
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