初始化提交

arduino-cli/libraries/Rtc_by_Makuna/examples/DS1302_Memory/DS1302_Memory.ino

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+
+// CONNECTIONS:
+// DS1302 CLK/SCLK --> 5
+// DS1302 DAT/IO --> 4
+// DS1302 RST/CE --> 2
+// DS1302 VCC --> 3.3v - 5v
+// DS1302 GND --> GND
+
+#include <ThreeWire.h>  
+#include <RtcDS1302.h>
+
+ThreeWire myWire(4,5,2); // IO, SCLK, CE
+RtcDS1302<ThreeWire> Rtc(myWire);
+
+#define countof(a) (sizeof(a) / sizeof(a[0]))
+
+const char data[] = "what time is it";
+
+void setup () 
+{
+    Serial.begin(57600);
+
+    Serial.print("compiled: ");
+    Serial.print(__DATE__);
+    Serial.println(__TIME__);
+    
+    Rtc.Begin();
+
+    RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
+    printDateTime(compiled);
+    Serial.println();
+
+    if (!Rtc.IsDateTimeValid()) 
+    {
+        Serial.println("RTC lost confidence in the DateTime!");
+        Rtc.SetDateTime(compiled);
+    }
+
+    if (Rtc.GetIsWriteProtected())
+    {
+        Serial.println("RTC was write protected, enabling writing now");
+        Rtc.SetIsWriteProtected(false);
+    }
+
+    if (!Rtc.GetIsRunning())
+    {
+        Serial.println("RTC was not actively running, starting now");
+        Rtc.SetIsRunning(true);
+    }
+
+    RtcDateTime now = Rtc.GetDateTime();
+    if (now < compiled) 
+    {
+        Serial.println("RTC is older than compile time!  (Updating DateTime)");
+        Rtc.SetDateTime(compiled);
+    }
+
+
+/* comment out on a second run to see that the info is stored long term */
+    // Store something in memory on the RTC
+    uint8_t count = sizeof(data);
+    uint8_t written = Rtc.SetMemory((const uint8_t*)data, count); // this includes a null terminator for the string
+    if (written != count) 
+    {
+        Serial.print("something didn't match, count = ");
+        Serial.print(count, DEC);
+        Serial.print(", written = ");
+        Serial.print(written, DEC);
+        Serial.println();
+    }
+/* end of comment out section */
+}
+
+void loop () 
+{
+    RtcDateTime now = Rtc.GetDateTime();
+
+    printDateTime(now);
+    Serial.println(" +");
+
+    if (!now.IsValid())
+    {
+        // Common Causes:
+        //    1) the battery on the device is low or even missing and the power line was disconnected
+        Serial.println("RTC lost confidence in the DateTime!");
+    }
+
+    delay(5000);
+
+    // read data
+    uint8_t buff[20];
+    const uint8_t count = sizeof(buff);
+    // get our data
+    uint8_t gotten = Rtc.GetMemory(buff, count);
+
+    if (gotten != count) 
+    {
+        Serial.print("something didn't match, count = ");
+        Serial.print(count, DEC);
+        Serial.print(", gotten = ");
+        Serial.print(gotten, DEC);
+        Serial.println();
+    }
+
+    Serial.print("data read (");
+    Serial.print(gotten);
+    Serial.print(") = \"");
+    // print the string, but terminate if we get a null
+    for (uint8_t ch = 0; ch < gotten && buff[ch]; ch++)
+    {
+        Serial.print((char)buff[ch]);
+    }
+    Serial.println("\"");
+    
+    delay(5000);
+}
+
+
+
+void printDateTime(const RtcDateTime& dt)
+{
+    char datestring[20];
+
+    snprintf_P(datestring, 
+            countof(datestring),
+            PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
+            dt.Month(),
+            dt.Day(),
+            dt.Year(),
+            dt.Hour(),
+            dt.Minute(),
+            dt.Second() );
+    Serial.print(datestring);
+}
+