Vadim Artamonov / DS3231

DS3231 External RTC I2C

Fork of DS3231 by Bird Techstep

Diff: DS3231.cpp

Revision:
3:f599542b06ad
Parent:
2:fc6317727d1d
Child:
5:6fab75b89838
--- a/DS3231.cpp	Tue Nov 03 08:15:12 2015 +0000
+++ b/DS3231.cpp	Thu Nov 05 16:44:45 2015 +0000
@@ -266,6 +266,17 @@
     _i2c.read( ADDR, temp, 2);
     return float(temp[0]) + 0.25*(temp[1]>>6);
 }
+bool DS3231::status(void) {
+    // Checks DS3231 and returns the status.
+    // returns true if DS3231 is present and on
+    char temp[2];
+    char cmd;
+    cmd = 0x11;
+    int w= _i2c.write(ADDR, &cmd, 1);
+    int r= _i2c.read( ADDR, temp, 2);
+    bool error=((w!=0)||(r!=0));
+    return !error;
+}
 
 void DS3231::getA1Time(uint8_t& A1Day, uint8_t& A1Hour, uint8_t& A1Minute, uint8_t& A1Second, uint8_t& AlarmBits, bool& A1Dy, bool& A1h12, bool& A1PM) {
     uint8_t temp_buffer;