This program is given as a sample exercise. It has all the functionality to be used on a BLE Nano device and to connect to SimpleChat application for Android/ iOS from RebBearLab. The aim of the exercise is to read a voltage and then to convert as good as possible the appropriate temperature in Celsius degrees. AI5 pin is considered for reading the voltage for the termistor. The ADC of AI5 is called every second. The function to be updated : update_measurements() from main.cpp file.

Dependencies:   BLE_API mbed nRF51822

Fork of nRF51822_DataLogger_with_Chat by Valentin Tanasa

Revision:
11:baafa4f7a15e
Parent:
10:c7d53e4e0602
Child:
12:7772974713ac
--- a/myFunctions.cpp	Tue Apr 26 20:15:41 2016 +0000
+++ b/myFunctions.cpp	Fri May 06 18:14:18 2016 +0000
@@ -27,104 +27,60 @@
     return retVal;    
 }
 
-void save_flash_curr_pageNr(date_t mdata){
-    uint8_t data2write[4];
-    memcpy(&data2write,&mdata,sizeof(date_t));
-    data2write[3] = g_currPage;
-    ble_flash_word_write((((uint32_t *)((uint16_t)256 * 255)) + 254),*(uint32_t*)data2write);
-}
-
-void search_latest_in_flash(date_t * outDate, mtime_t * outTime){
-    uint8_t page_nr, sizeB;
+void search_latest_in_flash(mdate_time_t * outDateTime){
+    uint8_t page_nr, sizeB,temp[6];
     uint16_t max_page=(uint16_t)MAX_PAGE_NUM+1u;
     int retVal;
-    myDataLogShort_t initialData;
-    date_t max_date={16,1,1}, inv_date={255,255,255};
-    mtime_t max_time={0,0,0}, inv_time={255,255,255};
+    mdate_time_t max_datetime={16,1,1,0,0,0}, inv_datetime={255,255,255,255,255,255};
     
-    sizeB=sizeof(date_t);
+    sizeB=sizeof(mdate_time_t);
     uint32_t* p_curr_addr;
     
     for (page_nr = MAX_PAGE_NUM; page_nr>= MIN_PAGE_NUM; page_nr --){
         p_curr_addr= (uint32_t *)((uint16_t)BLE_FLASH_PAGE_SIZE * page_nr);
         p_curr_addr += 2; // skip the magic number and the word count                
-        memcpy((uint32_t*)&initialData, p_curr_addr, 6*sizeof(uint32_t));
-        retVal = memcmp(&initialData.startData.date, &inv_date, sizeB);
+        
+        memcpy(temp, p_curr_addr, sizeB);        
+        retVal = memcmp(&temp, &inv_datetime, sizeB);
         if (retVal!=0) {
-            retVal = memcmp(&initialData.startData.time, &inv_time, sizeB);
-            if (retVal !=0) {
-                retVal  = memcmp(&initialData.startData.date, &max_date, sizeB);
-                if (retVal >=0) {
-                        if (retVal>0){
-                            memcpy(&max_date, &initialData.startData.date, sizeB);
-                            max_time.hour = 0;
-                            max_time.min = 0;
-                            max_time.sec = 0;
-                        }
-                        retVal = memcmp(&initialData.startData.time, &max_time, sizeB);
-                        if (retVal >=0) {
-                            memcpy(&max_time, &initialData.startData.time, sizeB);
-                            max_page= page_nr;                            
-                        }
+            retVal  = memcmp(&temp, &max_datetime, sizeB);
+                if (retVal >0) {
+                        memcpy(&max_datetime, &temp, sizeB);
+                        max_page= page_nr;
                 }
-                
-            }
-        }        
+        }
     }
    
-    memcpy(outTime, &max_time, sizeB);
-    memcpy(outDate, &max_date, sizeB);
+    memcpy(outDateTime, &max_datetime, sizeB);    
     g_currPage= (uint8_t)(max_page-1u);
 }
 
-void load_flash_curr_pageNr(date_t *mdata){
-    uint8_t l_currPage[4];    
-    date_t lDate;
-    memcpy(&lDate,mdata,sizeof(date_t));
-    memcpy(&l_currPage,( ((uint32_t *)(BLE_FLASH_PAGE_SIZE * 255)) + 254),sizeof(uint32_t));
-
-    g_currPage = (l_currPage[3]);
-    memcpy(mdata,&l_currPage,sizeof(date_t));
-
-    if (g_currPage< MIN_PAGE_NUM){
-        g_currPage = MAX_PAGE_NUM;
+void update_time(mdatetime_manager_t* myDateTimeVar, uint16_t tseconds){
+    //memcpy(&myDateTimeVar->newDateTime, &myDateTimeVar->currentDateTime, sizeof(mdate_time_t));    
+    if (myDateTimeVar->updateDateTime ==false){
+        myDateTimeVar->newDateTime.seconds = (myDateTimeVar->currentDateTime.seconds + tseconds)% 60; 
+        myDateTimeVar->newDateTime.minutes = (myDateTimeVar->currentDateTime.minutes + ((tseconds + myDateTimeVar->currentDateTime.seconds) / 60))%60;
+        if (myDateTimeVar->newDateTime.minutes< myDateTimeVar->currentDateTime.minutes ) { 
+            myDateTimeVar->currentDateTime.hours++;
+        }
+        myDateTimeVar->newDateTime.hours = (myDateTimeVar->currentDateTime.hours + (tseconds / 3600+myDateTimeVar->newDateTime.minutes/60))%24;
+        if (myDateTimeVar->newDateTime.hours < myDateTimeVar->currentDateTime.hours){
+            myDateTimeVar->newDateTime.day = (myDateTimeVar->currentDateTime.day + 1)%(eNrDaysPerMonth[myDateTimeVar->currentDateTime.month+1]+1);
+            if (myDateTimeVar->newDateTime.day < myDateTimeVar->currentDateTime.day ){
+                myDateTimeVar->newDateTime.month = (myDateTimeVar->currentDateTime.month+ 1)%13+1;
+                if (myDateTimeVar->newDateTime.month< myDateTimeVar->currentDateTime.month){
+                    myDateTimeVar->newDateTime.year = (myDateTimeVar->currentDateTime.year+ 1);
+                }
+            }         
+        }        
+    } else {        
+        myDateTimeVar->updateDateTime =false;
     }
     
-    if (mdata->year> 99u){
-        memcpy(mdata,&lDate,sizeof(date_t));
+    if (myDateTimeVar->updateDateTime ==true){  // there is a new Date ?        
+        myDateTimeVar->updateDateTime =true;
     }
-    //ble_flash_word_write((uint32_t *)(BLE_FLASH_PAGE_SIZE * MAX_PAGE_NUM),(uint32_t)g_currPage);
-}
-
-void update_time(mtime_manager_t* myTimeVar, mdate_manager_t* myDateVar, uint16_t tseconds){
-    if (myTimeVar->updateTime ==false){
-        myTimeVar->newTime.sec = (myTimeVar->currentTime.sec + tseconds)% 60; 
-        myTimeVar->newTime.min = (myTimeVar->currentTime.min + ((tseconds + myTimeVar->currentTime.sec) / 60))%60;
-        if (myTimeVar->newTime.min< myTimeVar->currentTime.min ) { 
-            myTimeVar->currentTime.hour++;
-        }
-        myTimeVar->newTime.hour = (myTimeVar->currentTime.hour + (tseconds / 3600+myTimeVar->newTime.min/60))%24;
-        if (myTimeVar->newTime.hour < myTimeVar->currentTime.hour){
-            memcpy(&myDateVar->newDate,&myDateVar->currentDate,sizeof(date_t));// fill with default date data
-            
-            myDateVar->newDate.day = (myDateVar->currentDate.day + 1)%(eNrDaysPerMonth[myDateVar->currentDate.month+1]+1);
-            if (myDateVar->newDate.day < myDateVar->currentDate.day ){
-                myDateVar->newDate.month = (myDateVar->currentDate.month+ 1)%13+1;
-                if (myDateVar->newDate.month< myDateVar->currentDate.month){
-                    myDateVar->newDate.year = (myDateVar->currentDate.year+ 1);
-                }
-            }
-           memcpy(&myDateVar->currentDate,&myDateVar->newDate, sizeof(date_t));
-        }
-        memcpy(&myTimeVar->currentTime,&myTimeVar->newTime, sizeof(mtime_t));    
-    } else {
-        memcpy(&myTimeVar->currentTime,&myTimeVar->newTime, sizeof(mtime_t));    
-        myTimeVar->updateTime =false;
-    }
-    if (myDateVar->updateDate ==true){  // there is a new Date ?
-        memcpy(&myDateVar->currentDate,&myDateVar->newDate, sizeof(date_t));
-        myDateVar->updateDate =true;
-    }
+    memcpy(&myDateTimeVar->currentDateTime,&myDateTimeVar->newDateTime, sizeof(mdate_time_t));    
 }