relay.cpp

00001 // GPS resource implementation
00002 
00003 #include "mbed.h"
00004 #include "nsdl_support.h"
00005 #include "relay.h"
00006 #include "Beep.h"
00007 
00008 #define RELAY_RES_ID    "beep/0/on"
00009 
00010 extern Serial pc;
00011 static Beep buzzer(p26);
00012 
00013 /* Only GET and PUT method allowed */
00014 static uint8_t relay_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
00015 {
00016     sn_coap_hdr_s *coap_res_ptr = 0;
00017     static uint8_t relay_state = '0';
00018 
00019     pc.printf("relay callback\r\n");
00020 
00021     if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET)
00022     {
00023         coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
00024 
00025         coap_res_ptr->payload_len = 1;
00026         coap_res_ptr->payload_ptr = &relay_state;
00027         sn_nsdl_send_coap_message(address, coap_res_ptr);
00028     }
00029     else if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT)
00030     {
00031         if(received_coap_ptr->payload_len)
00032         {
00033             if(*(received_coap_ptr->payload_ptr) == '1')
00034             {
00035                 buzzer.beep(1000,0);
00036                 relay_state = '1';
00037                 
00038             }
00039             else if(*(received_coap_ptr->payload_ptr) == '0')
00040             {
00041                 buzzer.nobeep();
00042                 relay_state = '0';
00043             }
00044             coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CHANGED);
00045             sn_nsdl_send_coap_message(address, coap_res_ptr);
00046         }
00047     }
00048 
00049     sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
00050 
00051     return 0;
00052 }
00053 
00054 int create_relay_resource(sn_nsdl_resource_info_s *resource_ptr)
00055 {
00056     nsdl_create_dynamic_resource(resource_ptr, sizeof(RELAY_RES_ID)-1, (uint8_t*)RELAY_RES_ID, 0, 0, 0, &relay_resource_cb, (SN_GRS_GET_ALLOWED | SN_GRS_PUT_ALLOWED));
00057     return 0;
00058 }