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Diffstat (limited to 'classic_api/triple_period/tasks.c')
| -rw-r--r-- | classic_api/triple_period/tasks.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/classic_api/triple_period/tasks.c b/classic_api/triple_period/tasks.c new file mode 100644 index 0000000..dbf1f6e --- /dev/null +++ b/classic_api/triple_period/tasks.c @@ -0,0 +1,170 @@ +/* + * COPYRIGHT (c) 1989-2007. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ +/* updated for triple test, 20003/11/06, Erik Adli */ + +#include "system.h" +#include <stdio.h> +#include <stdlib.h> + +/* CPU usage and Rate monotonic manger statistics */ +#include "rtems/cpuuse.h" + +// Periods for the various tasks [seconds] +#define PERIOD_TASK_ABSOLUTE 1 +#define PERIOD_TASK_RATE_MONOTONIC 2 +#define PERIOD_TASK_RELATIVE 3 + + + +// TASK 1 +// +// * Absolute timing for task 1 +// * CPU usage statistics +// * Demo end criteria +// +rtems_task Task_Absolute_Period( + rtems_task_argument unused +) +{ + rtems_time_of_day time; + rtems_status_code status; + uint32_t ticks_since_boot; + uint32_t count; + + count = 0; + rtems_cpu_usage_reset(); + + while( 1 ) { + status = rtems_clock_get( RTEMS_CLOCK_GET_TOD, &time ); + count++; + + // sets end criteria for demo application (60 seconds) + if ( time.second >= 60 ) { + puts( "*** END OF PERIODIC TASKING TRIPLE TEST ***" ); + exit( 0 ); + } + + printf( + "\n\nTask 1 - activating every %d second using " + "absolute time (rtems_task_wake_when)\n", + PERIOD_TASK_ABSOLUTE + ); + print_time( " - rtems_clock_get - ", &time, "\n" ); + rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &ticks_since_boot ); + printf(" - Ticks since boot: %" PRIu32 "\n", ticks_since_boot); + + rtems_time_of_day time; + + time.year = 1988; + time.month = 12; + time.day = 31; + time.hour = 9; + time.minute = 0; + time.second = count * PERIOD_TASK_ABSOLUTE; // Every N1 seconds + time.ticks = 0; // NB!! 'ticks' is don't care ( = does not work); rtems_task_wait_when has granularity of 1 second ( "taskwakewhen.c" nullifies time.ticks ) + + status = rtems_task_wake_when( &time ); + + // dump CPU usage every 5th period + if( 0 == (count % 5) ) { + //CPU_usage_Dump( ); // UNCOMMENT ME FOR WORKING CPU_usage_Dump + } + } +}; + + +// TASK 2 +// +// * RM schdeling for task 2 +// * Rate Monotonic usage statistics +// +rtems_task Task_Rate_Monotonic_Period( + rtems_task_argument unused +) +{ + rtems_time_of_day time; + rtems_status_code status; + uint32_t ticks_since_boot; + rtems_name my_period_name; + rtems_id RM_period; + bool is_RM_created = 0; + uint32_t count; + + count = 0; + + while( 1 ) { + status = rtems_clock_get( RTEMS_CLOCK_GET_TOD, &time ); + count++; + + printf( "\n\nTask 2 - activating every %d second using rate monotonic manager to schedule (rtems_rate_monotonic_period)\n", PERIOD_TASK_RATE_MONOTONIC); + print_time( " - rtems_clock_get - ", &time, "\n" ); + rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &ticks_since_boot ); + printf(" - Ticks since boot: %" PRIu32 "\n", ticks_since_boot); + + if( TRUE != is_RM_created ) { + count = 0; + my_period_name = rtems_build_name( 'P', 'E', 'R', '1' ); + status = rtems_rate_monotonic_create( my_period_name, &RM_period ); + if( RTEMS_SUCCESSFUL != status ) { + printf("RM failed with status: %d\n", status); + exit(1); + } + // Initiate RM periode + status = rtems_rate_monotonic_period( RM_period, get_ticks_per_second() * PERIOD_TASK_RATE_MONOTONIC ); // Every N2 seconds + if( RTEMS_SUCCESSFUL != status ) { + printf("RM failed with status: %d\n", status); + exit(1); + } + + is_RM_created = TRUE; + } + // Block until RM period has expired + status = rtems_rate_monotonic_period( RM_period, get_ticks_per_second() * PERIOD_TASK_RATE_MONOTONIC ); // Every N2 seconds + if( RTEMS_SUCCESSFUL != status ) { + if( RTEMS_TIMEOUT != status ) { + printf("RM missed period!\n"); + } + printf("RM failed with status: %d\n", status); + exit(1); + } + + // dump Rate Monotonic usage every 5th period + if( 0 == (count % 5) ) { + ; // rtems_rate_monotonic_report_statistics(); + } + } +} + + +// TASK 3 +// +// * relative delay for task 3 +// +rtems_task Task_Relative_Period( + rtems_task_argument unused +) +{ + rtems_time_of_day time; + rtems_status_code status; + uint32_t ticks_since_boot; + + while( 1 ) { + status = rtems_clock_get( RTEMS_CLOCK_GET_TOD, &time ); + + printf( "\n\nTask 3 - activating after every %d second using relative time (rtems_task_wake_after)\n", PERIOD_TASK_RELATIVE); + print_time( " - rtems_clock_get - ", &time, "\n" ); + rtems_clock_get( RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &ticks_since_boot ); + printf(" - Ticks since boot: %" PRIu32 "\n", ticks_since_boot); // Note how the ticks are drifting with this method + + status = rtems_task_wake_after( get_ticks_per_second() * PERIOD_TASK_RELATIVE ); // Every N3 seconds + } +} + |