osd-contiki/examples/osd/arduino-sketch/resource_led_pwm.c

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/**
* \file
* Resource for Arduino PWM
* \author
* Ralf Schlatterbeck <rsc@runtux.com>
*
* \brief get/put pwm and period for LED pin
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contiki.h"
#include "jsonparse.h"
/* Only coap 13 for now */
#include "er-coap-13.h"
#include "generic_resource.h"
#include "led_pwm.h"
void pwm_from_string (const char *name, const char *s)
{
uint32_t tmp = strtoul (s, NULL, 10);
if (tmp > 255) {
tmp = 255;
}
pwm = tmp;
}
size_t
pwm_to_string (const char *name, uint8_t is_json, char *buf, size_t bufsize)
{
return snprintf (buf, bufsize, "%d", pwm);
}
GENERIC_RESOURCE \
( led_pwm, METHOD_GET | METHOD_PUT
, "led/pwm"
, LED PWM
, duty-cycle
, pwm_from_string
, pwm_to_string
);
void period_from_string (const char *name, const char *s)
{
uint32_t tmp = (strtoul (s, NULL, 10) + 50) / 100;
if (tmp > 10) {
tmp = 10;
}
if (tmp == 0) {
tmp = 1;
}
period_100ms = tmp;
}
size_t
period_to_string (const char *name, uint8_t is_json, char *buf, size_t bufsize)
{
return snprintf (buf, bufsize, "%d", period_100ms * 100);
}
GENERIC_RESOURCE \
( led_period, METHOD_GET | METHOD_PUT
, "led/period"
, LED Period
, ms
, period_from_string
, period_to_string
);
size_t
analog2_v (const char *name, uint8_t is_json, char *buf, size_t bufsize)
{
return snprintf
(buf, bufsize, "%d.%03d", analog2_voltage / 1000, analog2_voltage % 1000);
}
GENERIC_RESOURCE \
( analog2_voltage, METHOD_GET
, "analog/2"
, Analog 2 voltage
, V
, NULL
, analog2_v
);
size_t
analog5_v (const char *name, uint8_t is_json, char *buf, size_t bufsize)
{
return snprintf
(buf, bufsize, "%d.%03d", analog5_voltage / 1000, analog5_voltage % 1000);
}
GENERIC_RESOURCE \
( analog5_voltage, METHOD_GET
, "analog/5"
, Analog 5 voltage
, V
, NULL
, analog5_v
);
/*
* VI settings, see coding style
* ex:ts=8:et:sw=2
*/