Diff: resources/temperature.cpp

Revision:

2:7e489126fe7a

Child:

3:52c1b649eb04

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/resources/temperature.cpp	Tue Oct 15 12:45:46 2013 +0000
@@ -0,0 +1,92 @@
+// Temperature resource implementation
+
+#include "mbed.h"
+#include "rtos.h"
+#include "LM75B.h"
+#include "nsdl_support.h"
+#include "temperature.h"
+
+#define TEMP_RES_ID     "sen/temp"
+
+static LM75B tmp(p28,p27);
+/* stored data for observable resource */
+static uint8_t obs_number = 0;
+static uint8_t *obs_token_ptr = 0;
+static uint8_t obs_token_len = 0;
+static char temp_val[5];
+extern Serial pc;
+
+/* Thread for calling libNsdl exec function (cleanup, resendings etc..) */
+/* Node updates temperature every 10 seconds. Notification sending is done here. */
+static void exec_call_thread(void const *args)
+{
+    int32_t time = 0;
+    while (true)
+    {
+        wait(1);
+        time++;
+        sn_nsdl_exec(time);
+        if((!(time % 10)) && obs_number != 0)
+        {
+            obs_number++;
+            sprintf(temp_val,"%2.2f" ,tmp.read());
+            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)
+                pc.printf("Observation sending failed\r\n");
+            else
+                pc.printf("Observation\r\n");
+        }
+    }
+}
+
+/* Only GET method allowed */
+/* Observable resource */
+static uint8_t temp_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
+{
+    sprintf(temp_val,"%2.2f" ,tmp.read());
+    sn_coap_hdr_s *coap_res_ptr = 0;
+
+    //pc.printf("temp callback\r\n");
+    coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
+
+    coap_res_ptr->payload_len = 5;
+    coap_res_ptr->payload_ptr = (uint8_t*)temp_val;
+
+    if(received_coap_ptr->token_ptr)
+    {
+        pc.printf("Token included\r\n");
+        if(obs_token_ptr)
+        {
+            free(obs_token_ptr);
+            obs_token_ptr = 0;
+        }
+        obs_token_ptr = (uint8_t*)malloc(received_coap_ptr->token_len);
+        if(obs_token_ptr)
+        {
+            memcpy(obs_token_ptr, received_coap_ptr->token_ptr, received_coap_ptr->token_len);
+            obs_token_len = received_coap_ptr->token_len;
+        }
+    }
+
+    if(received_coap_ptr->options_list_ptr->observe)
+    {
+        coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s));
+        memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
+        coap_res_ptr->options_list_ptr->observe_ptr = &obs_number;
+        coap_res_ptr->options_list_ptr->observe_len = 1;
+        obs_number++;
+    }
+
+    sn_nsdl_send_coap_message(address, coap_res_ptr);
+
+    coap_res_ptr->options_list_ptr->observe_ptr = 0;
+    sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
+    return 0;
+}
+
+int create_temperature_resource(sn_nsdl_resource_info_s *resource_ptr)
+{
+    Thread exec_thread(exec_call_thread);
+    
+    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);    
+    return 0;
+}
\ No newline at end of file