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Diffstat (limited to 'testsuites/sptests/spcpucounter01/init.c')
-rw-r--r-- | testsuites/sptests/spcpucounter01/init.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/testsuites/sptests/spcpucounter01/init.c b/testsuites/sptests/spcpucounter01/init.c new file mode 100644 index 0000000000..1ed8a582bd --- /dev/null +++ b/testsuites/sptests/spcpucounter01/init.c @@ -0,0 +1,112 @@ +/* + * Copyright (c) 2014 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * 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. + */ + +#ifdef HAVE_CONFIG_H + #include "config.h" +#endif + +#include <stdio.h> +#include <inttypes.h> + +#include <rtems.h> +#include <rtems/counter.h> + +#define TESTS_USE_PRINTF +#include "tmacros.h" + +#define NS_PER_TICK 1000000 + +static rtems_interval sync_with_clock_tick(void) +{ + rtems_interval start = rtems_clock_get_ticks_since_boot(); + rtems_interval current; + + do { + current = rtems_clock_get_ticks_since_boot(); + } while (current == start); + + return current; +} + +static void test_converter(void) +{ + CPU_Counter_ticks frequency = rtems_counter_nanoseconds_to_ticks(1000000000); + uint64_t ns = rtems_counter_ticks_to_nanoseconds(frequency); + + printf("CPU counter frequency: %" PRIu32 "Hz\n", frequency); + printf("nanoseconds for frequency count ticks: %" PRIu64 "\n", ns); + + rtems_test_assert(ns == 1000000000); +} + +static void test_delay_nanoseconds(void) +{ + rtems_counter_ticks start; + rtems_counter_ticks end; + rtems_counter_ticks delta; + double ns_per_tick = NS_PER_TICK; + double ns_delta; + rtems_interval tick; + int n = 10; + int i; + + printf("test delay nanoseconds (%i times)\n", n); + + for (i = 0; i < n; ++i) { + tick = sync_with_clock_tick(); + + start = rtems_counter_read(); + rtems_counter_delay_nanoseconds(NS_PER_TICK); + end = rtems_counter_read(); + + rtems_test_assert(tick < rtems_clock_get_ticks_since_boot()); + + delta = rtems_counter_difference(end, start); + ns_delta = rtems_counter_ticks_to_nanoseconds(delta); + + rtems_test_assert(ns_delta >= ns_per_tick); + + printf( + "busy wait relative to clock tick: %f\n", + (ns_delta - ns_per_tick) / ns_per_tick + ); + } +} + +static void Init(rtems_task_argument arg) +{ + puts("\n\n*** TEST SPCPUCOUNTER 1 ***"); + + test_converter(); + test_delay_nanoseconds(); + + puts("*** END OF TEST SPCPUCOUNTER 1 ***"); + + rtems_test_exit(0); +} + +#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER +#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER + +#define CONFIGURE_MICROSECONDS_PER_TICK (NS_PER_TICK / 1000) + +#define CONFIGURE_MAXIMUM_TASKS 1 + +#define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_FLOATING_POINT + +#define CONFIGURE_RTEMS_INIT_TASKS_TABLE + +#define CONFIGURE_INIT + +#include <rtems/confdefs.h> |