From 7c6b43d464f471d15bd2a777186b71c27bbf5229 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Fri, 6 May 2016 11:18:11 +0200
Subject: [PATCH] fix parity check

---
 lib/rtc_dcf77.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/rtc_dcf77.c b/lib/rtc_dcf77.c
index 754e949..61d2c5f 100644
--- a/lib/rtc_dcf77.c
+++ b/lib/rtc_dcf77.c
@@ -78,13 +78,13 @@ uint8_t* rtc_dcf77_time(void)
 	if (rtc_dcf77_frame==0) { // no time received yet
 		return NULL;
 	}
-	if (!(rtc_dcf77_frame&(1<<20))) { // start of encode time should always be 1
+	if (!(rtc_dcf77_frame&((uint64_t)1<<20))) { // start of encode time should always be 1
 		return NULL;
 	}
 	// check minute parity
 	parity = 0;
-	for (uint8_t bit=21; bit<29; bit++) {
-		if (rtc_dcf77_frame&(1<<bit)) {
+	for (uint8_t bit=21; bit<=28; bit++) {
+		if (rtc_dcf77_frame&((uint64_t)1<<bit)) {
 			parity++; // count the set bits
 		}
 	}
@@ -94,8 +94,8 @@ uint8_t* rtc_dcf77_time(void)
 	to_return[0] = 1*((rtc_dcf77_frame>>21)&(0x1))+2*((rtc_dcf77_frame>>22)&(0x1))+4*((rtc_dcf77_frame>>23)&(0x1))+8*((rtc_dcf77_frame>>24)&(0x1))+10*((rtc_dcf77_frame>>25)&(0x1))+20*((rtc_dcf77_frame>>26)&(0x1))+40*((rtc_dcf77_frame>>27)&(0x1)); // read minute (00-59)
 	// check hour parity
 	parity = 0;
-	for (uint8_t bit=29; bit<35; bit++) {
-		if (rtc_dcf77_frame&(1<<bit)) {
+	for (uint8_t bit=29; bit<=35; bit++) {
+		if (rtc_dcf77_frame&((uint64_t)1<<bit)) {
 			parity++; // count the set bits
 		}
 	}
@@ -105,8 +105,8 @@ uint8_t* rtc_dcf77_time(void)
 	to_return[1] = 1*((rtc_dcf77_frame>>29)&(0x1))+2*((rtc_dcf77_frame>>30)&(0x1))+4*((rtc_dcf77_frame>>31)&(0x1))+8*((rtc_dcf77_frame>>32)&(0x1))+10*((rtc_dcf77_frame>>33)&(0x1))+20*((rtc_dcf77_frame>>34)&(0x1)); // read hour (00-23)
 	// check date parity
 	parity = 0;
-	for (uint8_t bit=36; bit<57; bit++) {
-		if (rtc_dcf77_frame&(1<<bit)) {
+	for (uint8_t bit=36; bit<=58; bit++) {
+		if (rtc_dcf77_frame&((uint64_t)1<<bit)) {
 			parity++; // count the set bits
 		}
 	}