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/*
* Copyright (c) 2018 Richard Braun.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <lib/shell.h>
#include "gpio.h"
#include "led.h"
#include "thread.h"
#include "timer.h"
#define LED_BLINK_INTERVAL THREAD_SCHED_FREQ
static struct timer led_timer;
static bool led_on;
static volatile bool led_blinking_enabled;
static void
led_shell_blink(int argc, char **argv)
{
bool enabled;
if (argc != 2) {
goto error;
}
if (strcmp(argv[1], "on") == 0) {
enabled = true;
} else if (strcmp(argv[1], "off") == 0) {
enabled = false;
} else {
goto error;
}
led_blinking_enabled = enabled;
return;
error:
printf("led: error: invalid arguments\n");
}
static struct shell_cmd led_shell_cmds[] = {
SHELL_CMD_INITIALIZER("led_blink", led_shell_blink,
"led_blink <on|off>",
"control led blinking"),
};
static void
led_toggle(void *arg)
{
(void)arg;
if (led_blinking_enabled) {
if (led_on) {
gpio_led_off();
} else {
gpio_led_on();
}
}
led_on = !led_on;
timer_schedule(&led_timer, timer_get_time(&led_timer) + LED_BLINK_INTERVAL);
}
void
led_setup(void)
{
gpio_led_off();
led_on = false;
led_blinking_enabled = true;
SHELL_REGISTER_CMDS(led_shell_cmds);
timer_init(&led_timer, led_toggle, NULL);
timer_schedule(&led_timer, timer_now() + LED_BLINK_INTERVAL);
}
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