MBED_DEMOS / Mbed 2 deprecated LPC1768_LWM2M_Client

LPC1768 hell world with LWM2M

Dependencies:   Beep C12832_lcd EthernetInterface LM75B MMA7660 mbed-rtos mbed nsdl_lib

resources/temperature.cpp@0:9101343a70cd, 2014-07-22 (annotated)

Committer:
michaeljkoster
Date:
Tue Jul 22 23:58:23 2014 +0000
Revision:
0:9101343a70cd
Demo with lwm2m

Who changed what in which revision?

UserRevisionLine numberNew contents of line
michaeljkoster 0:9101343a70cd 1 // Temperature resource implementation
michaeljkoster 0:9101343a70cd 2
michaeljkoster 0:9101343a70cd 3 #include "mbed.h"
michaeljkoster 0:9101343a70cd 4 #include "rtos.h"
michaeljkoster 0:9101343a70cd 5 #include "LM75B.h"
michaeljkoster 0:9101343a70cd 6 #include "nsdl_support.h"
michaeljkoster 0:9101343a70cd 7 #include "temperature.h"
michaeljkoster 0:9101343a70cd 8
michaeljkoster 0:9101343a70cd 9 #define TEMP_RES_ID "sen/temp"
michaeljkoster 0:9101343a70cd 10
michaeljkoster 0:9101343a70cd 11 static LM75B tmp(p28,p27);
michaeljkoster 0:9101343a70cd 12 /* stored data for observable resource */
michaeljkoster 0:9101343a70cd 13 static uint8_t obs_number = 0;
michaeljkoster 0:9101343a70cd 14 static uint8_t *obs_token_ptr = NULL;
michaeljkoster 0:9101343a70cd 15 static uint8_t obs_token_len = 0;
michaeljkoster 0:9101343a70cd 16 static char temp_val[5];
michaeljkoster 0:9101343a70cd 17 extern Serial pc;
michaeljkoster 0:9101343a70cd 18
michaeljkoster 0:9101343a70cd 19 /* Thread for calling libNsdl exec function (cleanup, resendings etc..) */
michaeljkoster 0:9101343a70cd 20 /* Node updates temperature every 10 seconds. Notification sending is done here. */
michaeljkoster 0:9101343a70cd 21 static void exec_call_thread(void const *args)
michaeljkoster 0:9101343a70cd 22 {
michaeljkoster 0:9101343a70cd 23 int32_t time = 0;
michaeljkoster 0:9101343a70cd 24 while (true)
michaeljkoster 0:9101343a70cd 25 {
michaeljkoster 0:9101343a70cd 26 wait(1);
michaeljkoster 0:9101343a70cd 27 time++;
michaeljkoster 0:9101343a70cd 28 sn_nsdl_exec(time);
michaeljkoster 0:9101343a70cd 29 if((!(time % 10)) && obs_number != 0 && obs_token_ptr != NULL)
michaeljkoster 0:9101343a70cd 30 {
michaeljkoster 0:9101343a70cd 31 obs_number++;
michaeljkoster 0:9101343a70cd 32 sprintf(temp_val,"%2.2f" ,tmp.read());
michaeljkoster 0:9101343a70cd 33 if(sn_nsdl_send_observation_notification(obs_token_ptr, obs_token_len, (uint8_t*)temp_val, 5, &obs_number, 1, COAP_MSG_TYPE_NON_CONFIRMABLE, 0) == 0)
michaeljkoster 0:9101343a70cd 34 pc.printf("Observation sending failed\r\n");
michaeljkoster 0:9101343a70cd 35 else
michaeljkoster 0:9101343a70cd 36 pc.printf("Observation\r\n");
michaeljkoster 0:9101343a70cd 37 }
michaeljkoster 0:9101343a70cd 38 }
michaeljkoster 0:9101343a70cd 39 }
michaeljkoster 0:9101343a70cd 40
michaeljkoster 0:9101343a70cd 41 /* Only GET method allowed */
michaeljkoster 0:9101343a70cd 42 /* Observable resource */
michaeljkoster 0:9101343a70cd 43 static uint8_t temp_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
michaeljkoster 0:9101343a70cd 44 {
michaeljkoster 0:9101343a70cd 45 sprintf(temp_val,"%2.2f" ,tmp.read());
michaeljkoster 0:9101343a70cd 46 sn_coap_hdr_s *coap_res_ptr = 0;
michaeljkoster 0:9101343a70cd 47
michaeljkoster 0:9101343a70cd 48 pc.printf("temp callback\r\n");
michaeljkoster 0:9101343a70cd 49 coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
michaeljkoster 0:9101343a70cd 50
michaeljkoster 0:9101343a70cd 51 coap_res_ptr->payload_len = 5;
michaeljkoster 0:9101343a70cd 52 coap_res_ptr->payload_ptr = (uint8_t*)temp_val;
michaeljkoster 0:9101343a70cd 53
michaeljkoster 0:9101343a70cd 54 if(received_coap_ptr->token_ptr)
michaeljkoster 0:9101343a70cd 55 {
michaeljkoster 0:9101343a70cd 56 pc.printf("Token included\r\n");
michaeljkoster 0:9101343a70cd 57 if(obs_token_ptr)
michaeljkoster 0:9101343a70cd 58 {
michaeljkoster 0:9101343a70cd 59 free(obs_token_ptr);
michaeljkoster 0:9101343a70cd 60 obs_token_ptr = 0;
michaeljkoster 0:9101343a70cd 61 }
michaeljkoster 0:9101343a70cd 62 obs_token_ptr = (uint8_t*)malloc(received_coap_ptr->token_len);
michaeljkoster 0:9101343a70cd 63 if(obs_token_ptr)
michaeljkoster 0:9101343a70cd 64 {
michaeljkoster 0:9101343a70cd 65 memcpy(obs_token_ptr, received_coap_ptr->token_ptr, received_coap_ptr->token_len);
michaeljkoster 0:9101343a70cd 66 obs_token_len = received_coap_ptr->token_len;
michaeljkoster 0:9101343a70cd 67 }
michaeljkoster 0:9101343a70cd 68 }
michaeljkoster 0:9101343a70cd 69
michaeljkoster 0:9101343a70cd 70 if(received_coap_ptr->options_list_ptr->observe)
michaeljkoster 0:9101343a70cd 71 {
michaeljkoster 0:9101343a70cd 72 coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s));
michaeljkoster 0:9101343a70cd 73 memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
michaeljkoster 0:9101343a70cd 74 coap_res_ptr->options_list_ptr->observe_ptr = &obs_number;
michaeljkoster 0:9101343a70cd 75 coap_res_ptr->options_list_ptr->observe_len = 1;
michaeljkoster 0:9101343a70cd 76 obs_number++;
michaeljkoster 0:9101343a70cd 77 }
michaeljkoster 0:9101343a70cd 78
michaeljkoster 0:9101343a70cd 79 sn_nsdl_send_coap_message(address, coap_res_ptr);
michaeljkoster 0:9101343a70cd 80
michaeljkoster 0:9101343a70cd 81 coap_res_ptr->options_list_ptr->observe_ptr = 0;
michaeljkoster 0:9101343a70cd 82 sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
michaeljkoster 0:9101343a70cd 83 return 0;
michaeljkoster 0:9101343a70cd 84 }
michaeljkoster 0:9101343a70cd 85
michaeljkoster 0:9101343a70cd 86 int create_temperature_resource(sn_nsdl_resource_info_s *resource_ptr)
michaeljkoster 0:9101343a70cd 87 {
michaeljkoster 0:9101343a70cd 88 static Thread exec_thread(exec_call_thread);
michaeljkoster 0:9101343a70cd 89
michaeljkoster 0:9101343a70cd 90 nsdl_create_dynamic_resource(resource_ptr, sizeof(TEMP_RES_ID)-1, (uint8_t*)TEMP_RES_ID, 0, 0, 1, &temp_resource_cb, SN_GRS_GET_ALLOWED);
michaeljkoster 0:9101343a70cd 91 return 0;
michaeljkoster 0:9101343a70cd 92 }