From 4bc59d1a33bc5024cbb487c41536cd0904b27171 Mon Sep 17 00:00:00 2001
From: BlackMark <me@blackmark.me>
Date: Sun, 17 Dec 2017 10:53:38 +0100
Subject: [PATCH] Changed wrong CPU FREQ define to central correct one

---
 ds3231/twi-lowlevel.cpp | 2 +-
 ds3231/twi-lowlevel.h   | 6 ++----
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/ds3231/twi-lowlevel.cpp b/ds3231/twi-lowlevel.cpp
index aa051d7..c50f3b5 100644
--- a/ds3231/twi-lowlevel.cpp
+++ b/ds3231/twi-lowlevel.cpp
@@ -79,7 +79,7 @@ void twi_init(void)
   // initialize twi prescaler and bit rate
   cbi(TWSR, TWPS0);
   cbi(TWSR, TWPS1);
-  TWBR = ((CPU_FREQ / TWI_FREQ) - 16) / 2;
+  TWBR = ((F_CPU / TWI_FREQ) - 16) / 2;
 
   /* twi bit rate formula from atmega128 manual pg 204
   SCL Frequency = CPU Clock Frequency / (16 + (2 * TWBR))
diff --git a/ds3231/twi-lowlevel.h b/ds3231/twi-lowlevel.h
index d898f01..ec46eb1 100644
--- a/ds3231/twi-lowlevel.h
+++ b/ds3231/twi-lowlevel.h
@@ -22,11 +22,9 @@
 
 #include <inttypes.h>
 
-//#define ATMEGA8
+#include "clock.h"
 
-#ifndef CPU_FREQ
-#define CPU_FREQ 16000000L
-#endif
+//#define ATMEGA8
 
 #ifndef TWI_FREQ
 #define TWI_FREQ 100000L