From 9cbb0d04bba30988d6e814726800444fa020e845 Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Fri, 26 May 2017 00:02:32 +0200
Subject: Time decoding works.

---
 inc/int/dcf77.c | 58 +++++++++++++++++++++------------------------------------
 inc/int/dcf77.h | 15 +++++++--------
 2 files changed, 28 insertions(+), 45 deletions(-)

(limited to 'inc')

diff --git a/inc/int/dcf77.c b/inc/int/dcf77.c
index 13af50d..31f1663 100755
--- a/inc/int/dcf77.c
+++ b/inc/int/dcf77.c
@@ -1,10 +1,14 @@
 // vim:set et sw=2 ts=2 tw=120:
 #include "dcf77.h"
 
+// 7372800/a=10000
+// 115200 / a * x = 10000
+// 7372800/8/150
+
 // returns -1 on error
 unsigned char getBits(const DCF start, const char len)
 {
-  static const unsigned char mult[]  = {1, 2, 4, 8, 10, 20 ,40 ,80};
+  static const unsigned char mult[]  = {1, 2, 4, 8, 10, 20, 40, 80};
   /// unsigned char p = 1; //parity
   unsigned char r = 0; // retval
   unsigned char i;
@@ -15,32 +19,13 @@ unsigned char getBits(const DCF start, const char len)
   return r;
 }
 
-void set_dcf_value()
-{
-  t_current.m = (getBits(DCF_MIN,      7)) - 1;
-  t_current.h = (getBits(DCF_HOUR,     6));
-  t_current.dd = (getBits(DCF_DAY,     6));
-  t_current.wd = (getBits(DCF_WEEKDAY, 3));
-  t_current.mm = (getBits(DCF_MONTH,   5));
-  t_current.yy = (getBits(DCF_YEAR,    8));
-}
-
-// 7372800/a=10000
-// 115200 / a * x = 10000
-// 7372800/8/150
-
 // interrupt service routine (ISR) for timer 0 A compare match
-/*
-ISR(TIMER0A_COMP_vect) // called 10000 times per second (12000000/8/150)
-{
-
-}
-*/
 ISR(TIMER0_COMPB_vect)
 {
 
 }
 
+// ISR(TIMER0A_COMP_vect)
 ISR(TIMER0_COMPA_vect)
 {
   interval++;
@@ -69,43 +54,42 @@ ISR(INT0_vect)
 
 ISR(PCINT0_vect)
 {
-  interval = 1;
-  /// stdout_put_int(interval, uart_putc);
-  /// stdout_put_string("INT0 call\n", uart_putc);
-  // cli();
-
   // if(INT0_CONTROL == INT0_RISING_EDGE)
   // if(MCUCR & (1<<ISC00))
   // {
   if (interval > 1000 && interval < 2000) // 59th second - no rising edge at the beginning
   {
-    /// if(dcf77_bit == 59) // check if every bit has been transfered
-    // set_dcf_value();  // completely received- apply new time data
+    if(dcf77_bit == 59) // check if every bit has been transfered
+    {
+      t_current.m  = getBits(DCF_MIN,     7);
+      t_current.h  = getBits(DCF_HOUR,    6);
+      t_current.dd = getBits(DCF_DAY,     6);
+      t_current.wd = getBits(DCF_WEEKDAY, 3);
+      t_current.mm = getBits(DCF_MONTH,   5);
+      t_current.yy = getBits(DCF_YEAR,    8);
+    }
 
     // 59th second: synchronize with receiver...
-    TCNT0 = 0;
     dcf77_bit = 0;
     t_current.s = 0;
     t_current.ms = 0;
-    // t_current.us = 0;
+
     // falling edge causes interrupt...
-    // MCUCR &= ~(1 << ISC00);
-    // MCUCR |=  (1 << ISC01);
     // INT0_CONTROL = INT0_FALLING_EDGE;
   }
   else // INT0_FALLING_EDGE
   {
-    dcf77[dcf77_bit++].bit = interval >= 200 ? 1 : 0;
+    if(interval > 50 && interval < 150)
+      dcf77[dcf77_bit++].bit = 0;
+    else if(interval > 150 && interval < 250)
+      dcf77[dcf77_bit++].bit = 1;
 
     // rising edge causes interrupt...
-    // MCUCR |= (1 << ISC00);
-    // MCUCR |= (1 << ISC01);
     // INT0_CONTROL = INT0_RISING_EDGE;
-    // interval = 0; // reset interval to count next interval
   }
 
+  TCNT0 = 0;
   interval = 0;
-  // sei();
 }
 
 /*
diff --git a/inc/int/dcf77.h b/inc/int/dcf77.h
index e47ca4e..2d79cdd 100755
--- a/inc/int/dcf77.h
+++ b/inc/int/dcf77.h
@@ -9,7 +9,6 @@
    */
   #include <avr/io.h>
   #include <avr/interrupt.h>
-
   #include <stdint.h>
 
   #define INT0_CONTROL       MCUCR
@@ -26,14 +25,14 @@
 
   typedef struct
   {
-    uint16_t h ;  // hour
-    uint16_t m ;  // minute
-    uint16_t s ;  // second
+    uint16_t  h;  // hour
+    uint16_t  m;  // minute
+    uint16_t  s;  // second
     uint16_t ms;  // milli second
-    uint8_t yy;  // year
-    uint8_t mm;  // month
-    uint8_t dd;  // day
-    uint8_t wd;  // weekday
+    uint8_t  yy;  // year
+    uint8_t  mm;  // month
+    uint8_t  dd;  // day
+    uint8_t  wd;  // weekday
   } Time;
 
   typedef enum
-- 
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