5991c3e3db
Mainly for PWM use for now. With example to set the LED to different brightness via COAP. We switch the LED with 50 kHz (20µs) in this example.
149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
/*
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* Copyright (C) 2011, Matthias Kovatsch and other contributors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* Erbium (Er) PWM REST Engine example (with CoAP-specific code)
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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* Ralf Schlatterbeck <rsc@runtux.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "jsonparse.h"
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#include "erbium.h"
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#include "er-coap-13.h"
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#include "led_pwm.h"
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#define DEBUG 1
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/******************************************************************************/
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/*
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* Resources are defined by the RESOURCE macro.
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* Signature: resource name, the RESTful methods it handles, and its URI
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* path (omitting the leading slash).
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*/
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RESOURCE(info, METHOD_GET, "info", "title=\"Info\";rt=\"text\"");
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/*
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* A handler function named [resource name]_handler must be implemented
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* for each RESOURCE. A buffer for the response payload is provided
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* through the buffer pointer. Simple resources can ignore
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* preferred_size and offset, but must respect the REST_MAX_CHUNK_SIZE
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* limit for the buffer. If a smaller block size is requested for CoAP,
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* the REST framework automatically splits the data.
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*/
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void
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info_handler(void* request, void* response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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char message[100];
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int index = 0;
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int length = 0; /* |<-------->| */
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/*
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* Some data that has the length up to REST_MAX_CHUNK_SIZE. For more,
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* see the chunk resource.
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*/
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// jSON Format
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index += sprintf(message + index,"{\n \"Version\" : \"V1.0pre1\",\n");
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index += sprintf(message + index," \"name\" : \"PWM\"\n");
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index += sprintf(message + index,"}\n");
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length = strlen(message);
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memcpy(buffer, message,length );
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REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
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REST.set_response_payload(response, buffer, length);
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}
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void
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hw_init()
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{
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led_pwm_init ();
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}
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PROCESS(rest_server_example, "Erbium Example Server");
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AUTOSTART_PROCESSES(&rest_server_example);
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PROCESS_THREAD(rest_server_example, ev, data)
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{
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PROCESS_BEGIN();
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PRINTF("Starting Erbium Example Server\n");
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#ifdef RF_CHANNEL
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PRINTF("RF channel: %u\n", RF_CHANNEL);
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#endif
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#ifdef IEEE802154_PANID
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PRINTF("PAN ID: 0x%04X\n", IEEE802154_PANID);
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#endif
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PRINTF("uIP buffer: %u\n", UIP_BUFSIZE);
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PRINTF("LL header: %u\n", UIP_LLH_LEN);
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PRINTF("IP+UDP header: %u\n", UIP_IPUDPH_LEN);
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PRINTF("REST max chunk: %u\n", REST_MAX_CHUNK_SIZE);
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/* if static routes are used rather than RPL */
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#if !UIP_CONF_IPV6_RPL \
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&& !defined (CONTIKI_TARGET_MINIMAL_NET) \
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&& !defined (CONTIKI_TARGET_NATIVE)
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set_global_address();
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configure_routing();
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#endif
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/* Initialize the OSD Hardware. */
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hw_init();
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/* Initialize the REST engine. */
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rest_init_engine();
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/* Activate the application-specific resources. */
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rest_activate_resource(&resource_info);
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rest_activate_resource(&resource_led_pwm);
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/* Define application-specific events here. */
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while(1) {
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PROCESS_WAIT_EVENT();
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} /* while (1) */
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PROCESS_END();
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}
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