Merge pull request #18 from UT2UH/getUnixEpoch

overloaded getUnixEpoch() 'rounded' added

examples/Example24_GetUnixEpochAndMicros/Example24_GetUnixEpochAndMicros.ino

@@ -1,7 +1,7 @@
 /*
   Getting Unix Epoch Time and micros using u-blox commands
   By: UT2UH
-  Date: March 30th, 2021
+  Date: March 31th, 2021
   License: MIT. See license file for more information but you can
   basically do whatever you want with this code.
 
@@ -69,8 +69,11 @@ void loop()
     // getUnixEpoch marks the PVT data as stale so you will get Unix time and PVT time on alternate seconds
 
     uint32_t us;  //microseconds returned by getUnixEpoch()
-    uint32_t epoch = myGNSS.getUnixEpoch(us);
+    uint32_t epoch = myGNSS.getUnixEpoch();
-    Serial.print("Unix Epoch: ");
+    Serial.print("Unix Epoch rounded: ");
+    Serial.print(epoch, DEC);    
+    epoch = myGNSS.getUnixEpoch(us);
+    Serial.print("  Exact Unix Epoch: ");
     Serial.print(epoch, DEC);
     Serial.print("  micros: ");
     Serial.println(us, DEC);

src/SparkFun_u-blox_GNSS_Arduino_Library.cpp

@@ -8954,16 +8954,41 @@ int32_t SFE_UBLOX_GNSS::getNanosecond(uint16_t maxWait)
   return (packetUBXNAVPVT->data.nano);
 }
 
-//Get the current Unix epoch - includes microseconds
+//Get the current Unix epoch time rounded up to the nearest second
+uint32_t SFE_UBLOX_GNSS::getUnixEpoch(uint16_t maxWait)
+{
+  if (packetUBXNAVPVT == NULL) initPacketUBXNAVPVT(); //Check that RAM has been allocated for the PVT data
+  if (packetUBXNAVPVT == NULL) //Bail if the RAM allocation failed
+    return 0;
+
+  if (packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.sec == false)
+    getPVT(maxWait);
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.year = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.month = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.day = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.hour = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.min = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.sec = false;
+  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.all = false;
+  // assemble time elements into time_t - credits to Thomas Roell @ https://github.com/GrumpyOldPizza
+  uint32_t t = (uint32_t)(((((((packetUBXNAVPVT->data.year - 1970) * 365) + (((packetUBXNAVPVT->data.year - 1970) + 3) / 4)) + 
+                              DAYS_SINCE_MONTH[(packetUBXNAVPVT->data.year - 1970) & 3][packetUBXNAVPVT->data.month] +
+                            (packetUBXNAVPVT->data.day - 1)) * 24 +
+                          packetUBXNAVPVT->data.hour) * 60 +
+                        packetUBXNAVPVT->data.min) * 60 +
+                      packetUBXNAVPVT->data.sec);
+  return t;
+}
+
+//Get the current Unix epoch including microseconds
 uint32_t SFE_UBLOX_GNSS::getUnixEpoch(uint32_t& microsecond, uint16_t maxWait)
 {
   if (packetUBXNAVPVT == NULL) initPacketUBXNAVPVT(); //Check that RAM has been allocated for the PVT data
   if (packetUBXNAVPVT == NULL) //Bail if the RAM allocation failed
     return 0;
 
-  if (packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.confirmedTime == false)
+  if (packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.nano == false)
     getPVT(maxWait);
-  packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.confirmedTime = false;
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.year = false;
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.month = false;
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.day = false;
@@ -8972,23 +8997,19 @@ uint32_t SFE_UBLOX_GNSS::getUnixEpoch(uint32_t& microsecond, uint16_t maxWait)
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.sec = false;
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.nano = false;
   packetUBXNAVPVT->moduleQueried.moduleQueried1.bits.all = false;
-  uint32_t t = 0;
+  // assemble time elements into time_t - credits to Thomas Roell @ https://github.com/GrumpyOldPizza
-  if((bool)packetUBXNAVPVT->data.flags2.bits.confirmedTime)
+  uint32_t t = (uint32_t)(((((((packetUBXNAVPVT->data.year - 1970) * 365) + (((packetUBXNAVPVT->data.year - 1970) + 3) / 4)) + 
-  {
-    // assemble time elements into time_t - credits to Thomas Roell @ https://github.com/GrumpyOldPizza
-    t = (uint32_t)(((((((packetUBXNAVPVT->data.year - 1970) * 365) + (((packetUBXNAVPVT->data.year - 1970) + 3) / 4)) + 
                               DAYS_SINCE_MONTH[(packetUBXNAVPVT->data.year - 1970) & 3][packetUBXNAVPVT->data.month] +
                             (packetUBXNAVPVT->data.day - 1)) * 24 +
                           packetUBXNAVPVT->data.hour) * 60 +
                         packetUBXNAVPVT->data.min) * 60 +
                       packetUBXNAVPVT->data.sec);
-    int32_t us = packetUBXNAVPVT->data.nano / 1000;
+  int32_t us = packetUBXNAVPVT->data.nano / 1000;
-    microsecond = (uint32_t)us;
+  microsecond = (uint32_t)us;
-    // adjust t if nano is negative
+  // adjust t if nano is negative
-    if(us < 0) {
+  if(us < 0) {
-      microsecond = (uint32_t)(us + 1000000);
+    microsecond = (uint32_t)(us + 1000000);
-      t--;
+    t--;
-    }
   }
   return t;
 }

src/SparkFun_u-blox_GNSS_Arduino_Library.h

@@ -938,6 +938,7 @@ public:
 	uint8_t getSecond(uint16_t maxWait = defaultMaxWait);
 	uint16_t getMillisecond(uint16_t maxWait = defaultMaxWait);
 	int32_t getNanosecond(uint16_t maxWait = defaultMaxWait);
+	uint32_t getUnixEpoch(uint16_t maxWait = defaultMaxWait);
 	uint32_t getUnixEpoch(uint32_t& microsecond, uint16_t maxWait = defaultMaxWait);
 
 	bool getDateValid(uint16_t maxWait = defaultMaxWait);