light.cpp

00001 // Light resource implementation
00002 
00003 #include "mbed.h"
00004 #include "nsdl_support.h"
00005 #include "light.h"
00006 
00007 #define LIGHT_RES_ID    "311/0/5851"
00008 
00009 extern Serial pc;
00010 static PwmOut led2(LED2);
00011 static PwmOut led3(LED3);
00012 
00013 
00014 /* Only GET and PUT method allowed */
00015 static uint8_t light_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
00016 {
00017     sn_coap_hdr_s *coap_res_ptr = 0;
00018     static float led_dimm = 0;
00019     int led_state = 0;
00020     char led_dimm_temp[4];
00021 
00022     pc.printf("light callback\r\n");
00023 
00024     if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET)
00025     {
00026         coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
00027 
00028         led_state = led_dimm * 100;
00029         sprintf(led_dimm_temp, "%d", led_state);
00030 
00031         coap_res_ptr->payload_len = strlen(led_dimm_temp);
00032         coap_res_ptr->payload_ptr = (uint8_t*)led_dimm_temp;
00033         sn_nsdl_send_coap_message(address, coap_res_ptr);
00034     }
00035     else if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT)
00036     {
00037         memcpy(led_dimm_temp, (char *)received_coap_ptr->payload_ptr, received_coap_ptr->payload_len);
00038 
00039         led_dimm_temp[received_coap_ptr->payload_len] = '\0';
00040 
00041         led_dimm = atof(led_dimm_temp);
00042         led_dimm = led_dimm/100;
00043 
00044         led2.write(led_dimm);
00045         led3.write(led_dimm);
00046 
00047         coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CHANGED);
00048         sn_nsdl_send_coap_message(address, coap_res_ptr);
00049     }
00050 
00051     sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
00052     return 0;
00053 }
00054 
00055 int create_light_resource(sn_nsdl_resource_info_s *resource_ptr)
00056 {
00057     nsdl_create_dynamic_resource(resource_ptr, sizeof(LIGHT_RES_ID)-1, (uint8_t*)LIGHT_RES_ID, 0, 0, 0, &light_resource_cb, (SN_GRS_GET_ALLOWED | SN_GRS_PUT_ALLOWED));
00058     return 0;
00059 }