Diff: DS3234.cpp

Revision:

2:c2e2b6238a69

Parent:

1:7c0fa2bb38df

--- a/DS3234.cpp	Wed Dec 17 08:42:51 2014 +0000
+++ b/DS3234.cpp	Thu Dec 18 10:09:31 2014 +0000
@@ -11,12 +11,11 @@
  month 0x85
  year 0x86
 */
-void DS3234_set(PinName pin, struct ts t)
+
+void set(PinName pin, struct ts t)
 {
-    SPI spi(PTD6, PTD7, PTD5);
-    
-    
-    uint8_t i, century;
+   SPI spi(PTD6, PTD7, PTD5);
+   uint8_t i, century;
 
     if (t.year > 2000) {
         century = 0x80;
@@ -28,16 +27,55 @@
 
     uint8_t TimeDate[7] = { t.sec, t.min, t.hour, t.wday, t.mday, t.mon, t.year_s };
     for (i = 0; i <= 6; i++) {
+       
         DigitalOut cs(pin);
-        
+        cs = 0;
         spi.write(i + 0x80);
         if (i == 5)
         spi.write(dectobcd(TimeDate[5]) + century);
         else
         spi.write(dectobcd(TimeDate[i]));
-        cs.write(1);
+        cs = 1;
     }
+    
 }
+void DS3234_get(PinName pin, struct ts *t)
+{
+     SPI spi(PTD6, PTD7, PTD5);
+    uint8_t TimeDate[7];        //second,minute,hour,dow,day,month,year
+    uint8_t century = 0;
+    uint8_t i, n;
+    uint16_t year_full;
+    DigitalOut cs(pin);
+    
+    for (i = 0; i <= 6; i++) {
+        cs = 0;
+        spi.write(i + 0x00);
+        n = spi.write(0x00);
+        
+        if (i == 5) {           // month address also contains the century on bit7
+            TimeDate[5] = bcdtodec(n & 0x1F);
+            century = (n & 0x80) >> 7;
+        } else {
+            TimeDate[i] = bcdtodec(n);
+        }
+    }
+
+    if (century == 1)
+        year_full = 2000 + TimeDate[6];
+    else
+        year_full = 1900 + TimeDate[6];
+
+    t->sec = TimeDate[0];
+    t->min = TimeDate[1];
+    t->hour = TimeDate[2];
+    t->mday = TimeDate[4];
+    t->mon = TimeDate[5];
+    t->year = year_full;
+    t->wday = TimeDate[3];
+    t->year_s = TimeDate[6];
+}
+
 
 
 uint8_t dectobcd(const uint8_t val)
@@ -49,4 +87,3 @@
 {
     return ((val / 16 * 10) + (val % 16));
 }
-