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Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:7461 TEST=manual make BOARD={bds,link,daisy} make tests flash link system and make sure it boots Change-Id: I1241a1895c083e387e38ddab01ac346ca4474eb9
39 lines
817 B
C
39 lines
817 B
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 "uart.h"
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#include "task.h"
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#include "timer.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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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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uart_printf("\n[Timer task %d]\n", id);
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while (1) {
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/* Wait for a "random" period */
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task_wait_event(PERIOD_US(num));
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uart_printf("%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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return EC_SUCCESS;
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}
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