29 lines
650 B
C
29 lines
650 B
C
|
/* Copyright 2016 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "cts_common.h"
|
||
|
|
#include "gpio.h"
|
||
|
|
#include "watchdog.h"
|
||
|
|
|
||
|
|
enum cts_rc sync(void)
|
||
|
|
{
|
||
|
|
int input_level;
|
||
|
|
|
||
|
|
gpio_set_level(GPIO_HANDSHAKE_OUTPUT, 0);
|
||
|
|
do {
|
||
|
|
watchdog_reload();
|
||
|
|
input_level = gpio_get_level(GPIO_HANDSHAKE_INPUT);
|
||
|
|
} while (!input_level);
|
||
|
|
gpio_set_level(GPIO_HANDSHAKE_OUTPUT, 1);
|
||
|
|
do {
|
||
|
|
watchdog_reload();
|
||
|
|
input_level = gpio_get_level(GPIO_HANDSHAKE_INPUT);
|
||
|
|
} while (input_level);
|
||
|
|
gpio_set_level(GPIO_HANDSHAKE_OUTPUT, 0);
|
||
|
|
|
||
|
|
return CTS_RC_SUCCESS;
|
||
|
|
}
|
||
|
|
|