Ales Povalac / DS1307

Dallas DS1307 real-time clock minimalistic driver

Dependents:   testing_RTC_OneWire EMIRv2

Files at this revision

API Documentation at this revision

Revision 3:c5018c71887f, committed 2014-04-28

Comitter:
alpov
Date:
Mon Apr 28 13:08:38 2014 +0000
Parent:
2:6d8d35a5b3f2
Commit message:
fixed wrong 12/24-hour config

Changed in this revision

DS1307.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 6d8d35a5b3f2 -r c5018c71887f DS1307.cpp
--- a/DS1307.cpp	Mon Apr 28 09:23:06 2014 +0000
+++ b/DS1307.cpp	Mon Apr 28 13:08:38 2014 +0000
@@ -16,7 +16,7 @@
     if (ds1307_i2c.read(DS1307_ADDR, buffer, 7) != 0) return 0;
     
     if (buffer[0] & 0x80) return 0; // clock stopped
-    if (!(buffer[2] & 0x40)) return 0; // 12-hour format not supported
+    if (buffer[2] & 0x40) return 0; // 12-hour format not supported
     now.tm_sec = bcdToDecimal(buffer[0] & 0x7F);
     now.tm_min = bcdToDecimal(buffer[1]);
     now.tm_hour = bcdToDecimal(buffer[2] & 0x3F);
@@ -35,9 +35,9 @@
     now = localtime(&t);
 
     buffer[0] = 0x00; // memory address
-    buffer[1] = decimalToBcd(now->tm_sec) & 0x7f; // CH = 0
+    buffer[1] = decimalToBcd(now->tm_sec) & 0x7F; // CH = 0
     buffer[2] = decimalToBcd(now->tm_min);
-    buffer[3] = 0x40 | (decimalToBcd(now->tm_hour) & 0x3F); // 24-hour format
+    buffer[3] = decimalToBcd(now->tm_hour) & 0x3F; // 24-hour format
     buffer[4] = now->tm_wday + 1;
     buffer[5] = decimalToBcd(now->tm_mday);
     buffer[6] = decimalToBcd(now->tm_mon+1);