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/*
* Copyright © 2013 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <ao.h>
static int ao_watchdog_enabled = true;
static void
ao_watchdog(void)
{
for (;;) {
while (!ao_watchdog_enabled)
ao_sleep(&ao_watchdog_enabled);
while (ao_watchdog_enabled) {
ao_delay(AO_WATCHDOG_INTERVAL);
ao_gpio_set(AO_WATCHDOG_PORT, AO_WATCHDOG_BIT, 1);
ao_delay(1);
ao_gpio_set(AO_WATCHDOG_PORT, AO_WATCHDOG_BIT, 0);
}
}
}
static void
ao_watchdog_set(void)
{
uint32_t r = ao_cmd_hex();
if (ao_cmd_status == ao_cmd_success) {
ao_watchdog_enabled = r != 0;
ao_wakeup(&ao_watchdog_enabled);
}
}
static const struct ao_cmds ao_watchdog_cmds[] = {
{ ao_watchdog_set, "Q <0 off, 1 on>\0Enable or disable watchdog timer" },
{ 0, NULL },
};
static struct ao_task watchdog_task;
void
ao_watchdog_init(void)
{
ao_enable_output(AO_WATCHDOG_PORT, AO_WATCHDOG_BIT, 0);
ao_cmd_register(&ao_watchdog_cmds[0]);
ao_add_task(&watchdog_task, ao_watchdog, "watchdog");
}
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