mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-29 18:11:05 +00:00
e24fa592d2
source files mainly done by Vincent. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Change-Id: Ic2d1becd400c9b4b4a14d4a243af1bdf77d9c1e2
40 lines
845 B
C
40 lines
845 B
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Tasks for timer test.
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include "uart.h"
|
|
#include "task.h"
|
|
#include "timer.h"
|
|
|
|
/* Linear congruential pseudo random number generator*/
|
|
static uint32_t prng(uint32_t x)
|
|
{
|
|
return 22695477 * x + 1;
|
|
}
|
|
|
|
/* period between 500us and 128ms */
|
|
#define PERIOD_US(num) (((num % 256) + 1) * 500)
|
|
|
|
int TaskTimer(void *seed)
|
|
{
|
|
uint32_t num = (uint32_t)seed;
|
|
task_id_t id = task_get_current();
|
|
|
|
uart_printf("\n[Timer task %d]\n", id);
|
|
|
|
while (1) {
|
|
/* Wait for a "random" period */
|
|
task_wait_msg(PERIOD_US(num));
|
|
uart_printf("%01d\n", id);
|
|
/* next pseudo random delay */
|
|
num = prng(num);
|
|
}
|
|
|
|
return EC_SUCCESS;
|
|
}
|