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0ffc382af9
BUG=chrome-os-partner:18598 TEST=Run on Spring BRANCH=None Change-Id: I843591089c3d1bc739c452ee654da194355ddb09 Signed-off-by: Vic Yang <victoryang@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/48092 Reviewed-by: Randall Spangler <rspangler@chromium.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Tasks for timer test.
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*/
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#include "common.h"
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#include "console.h"
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#include "task.h"
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#include "timer.h"
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#include "util.h"
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/* Linear congruential pseudo random number generator*/
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static uint32_t prng(uint32_t x)
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{
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return 22695477 * x + 1;
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}
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/* period between 500us and 128ms */
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#define PERIOD_US(num) (((num % 256) + 1) * 500)
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#define TEST_TIME (3 * SECOND)
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int TaskTimer(void *seed)
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{
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uint32_t num = (uint32_t)seed;
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task_id_t id = task_get_current();
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timestamp_t start;
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while (1) {
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task_wait_event(-1);
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ccprintf("\n[Timer task %d]\n", id);
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start = get_time();
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while (get_time().val - start.val < TEST_TIME) {
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/* Wait for a "random" period */
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task_wait_event(PERIOD_US(num));
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ccprintf("%01d\n", id);
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/* next pseudo random delay */
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num = prng(num);
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}
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}
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return EC_SUCCESS;
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}
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static int command_run_test(int argc, char **argv)
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{
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task_wake(TASK_ID_TMRD);
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task_wake(TASK_ID_TMRC);
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task_wake(TASK_ID_TMRB);
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task_wake(TASK_ID_TMRA);
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(runtest, command_run_test,
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NULL, NULL, NULL);
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