Routines for setting and adjusting the Real Time Clock via DCF77. More...

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Functions
static uint8_t	BitsSet (uint8_t b)
	Counts the Number of 1-Bits in a Byte. More...

void	DCF77int (void)
	Interrupt Handler for DCF77. More...

int32_t	GetDCFdiff ()
	Gets the difference between DCF and RTC in seconds. Positive means RTC is late. More...

static uint8_t	GetPinState (void)
	Returns the logical Signal of the DCF Pin. More...

void	Invalidate ()
	Invalidates Reception Variables, so Reception is started from scratch. More...

static void	PushBit (uint8_t b)
	Stores a Bit in the next Position of the Telegram. More...

Variables
static uint8_t	bitcnt
	counts the bits in the telegram More...

int32_t	DCFdiff
	Difference to RTC in Seconds, positive means RTC is late. More...

bool	DCFInSync
	True when a valid Telegram has been received. More...

static uint8_t	dcfTicks
	counts 10ms-intervals between the edges of the signal More...

uint8_t	hour
	The Hour Value received. More...

static bool	lastPinState
	The Pin State at last Interrupt. More...

uint8_t	min
	The Minute Value received. More...

static bool	minpulseReceived
	Did we receive a valid Minute Pulse (missing Pulse at second 59)? More...

static const uint8_t	ms100max =14
	The maximum Pulse Width to be recognized as 100ms. More...

static const uint8_t	ms100min =6
	The minimum Pulse Width to be recognized as 100ms. More...

static const uint8_t	ms200max =23
	The maximum Pulse Width to be recognized as 200ms. More...

static const uint8_t	ms200min =15
	The minimum Pulse Width to be recognized as 200ms. More...

static const uint8_t	mspause59max =220
	The maximum Pulse Width to be recognized as a missing pulse. More...

static const uint8_t	mspause59min =150
	The minimum Pulse Width to be recognized as a missing pulse. More...

static const uint8_t	xorMask =0
	set to 0 or DCF77_PINMASK to invert signal More...

Detailed Description

Routines for setting and adjusting the Real Time Clock via DCF77.

Copyright: Copyright (C) 2009 Robert Loos http://www.loosweb.de

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Function Documentation

◆ BitsSet()

static uint8_t BitsSet ( uint8_t b )

static

Counts the Number of 1-Bits in a Byte.

Parameters

b The Byte

Returns: The Number of Bits set

Referenced by DCF77int().

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◆ DCF77int()

void DCF77int ( void )

Interrupt Handler for DCF77.

Has to be called from 10ms interrupt

References bitcnt, BitsSet(), dcfTicks, DFLAG_DCF77, dFlags, GetPinState(), hour, hprintf_P(), Invalidate(), lastPinState, min, minpulseReceived, ms100max, ms100min, ms200max, ms200min, mspause59max, mspause59min, PushBit(), and RTCsync().

Referenced by ISR().

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◆ GetDCFdiff()

int32_t GetDCFdiff ( )

Gets the difference between DCF and RTC in seconds. Positive means RTC is late.

References DCFdiff.

Referenced by CmdStat().

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◆ GetPinState()

static uint8_t GetPinState ( void )

inlinestatic

Returns the logical Signal of the DCF Pin.

This function honors the invDCF77 configuration variable and returns a polarity corrected value of the DCF77 receive signal.

Returns: 0 for pause, 1 for pulse

References config, DCF77_PIN, DCF77_PINMASK, confStruct_t::invDCF77, LEDBlueOff(), and LEDBlueOn().

Referenced by DCF77int().

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◆ Invalidate()

void Invalidate ( )

Invalidates Reception Variables, so Reception is started from scratch.

References bitcnt, DCFInSync, dcfTicks, hour, min, minpulseReceived, RTC_NORMAL, and RTCAdj.

Referenced by DCF77int(), InitDCF77(), and PushBit().

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◆ PushBit()

static void PushBit ( uint8_t b )

static

Stores a Bit in the next Position of the Telegram.

References bitcnt, DFLAG_DCF77, dFlags, hour, hprintf_P(), Invalidate(), and min.

Referenced by DCF77int().

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Variable Documentation

◆ bitcnt

uint8_t bitcnt

static

counts the bits in the telegram

Referenced by DCF77int(), Invalidate(), and PushBit().

◆ DCFdiff

int32_t DCFdiff

Difference to RTC in Seconds, positive means RTC is late.

Referenced by GetDCFdiff(), and RTCsync().

◆ DCFInSync

bool DCFInSync

True when a valid Telegram has been received.

Referenced by CmdSetTime(), CmdStat(), Invalidate(), RTCsync(), and ShowScreen().

◆ dcfTicks

uint8_t dcfTicks

static

counts 10ms-intervals between the edges of the signal

Referenced by DCF77int(), and Invalidate().

◆ hour

uint8_t hour

The Hour Value received.

Referenced by DCF77int(), Invalidate(), PushBit(), and RTCsync().

◆ lastPinState

bool lastPinState

static

The Pin State at last Interrupt.

Referenced by DCF77int().

◆ min

uint8_t min

The Minute Value received.

Referenced by CmdSetTime(), DCF77int(), Invalidate(), PushBit(), and RTCsync().

◆ minpulseReceived

bool minpulseReceived

static

Did we receive a valid Minute Pulse (missing Pulse at second 59)?

Referenced by DCF77int(), and Invalidate().

◆ ms100max

const uint8_t ms100max =14

static

The maximum Pulse Width to be recognized as 100ms.

Referenced by DCF77int().

◆ ms100min

const uint8_t ms100min =6

static

The minimum Pulse Width to be recognized as 100ms.

Referenced by DCF77int().

◆ ms200max

const uint8_t ms200max =23

static

The maximum Pulse Width to be recognized as 200ms.

Referenced by DCF77int().

◆ ms200min

const uint8_t ms200min =15

static

The minimum Pulse Width to be recognized as 200ms.

Referenced by DCF77int().

◆ mspause59max

const uint8_t mspause59max =220

static

The maximum Pulse Width to be recognized as a missing pulse.

Referenced by DCF77int().

◆ mspause59min

const uint8_t mspause59min =150

static

The minimum Pulse Width to be recognized as a missing pulse.

Referenced by DCF77int().

◆ xorMask

const uint8_t xorMask =0

static

set to 0 or DCF77_PINMASK to invert signal

Functions

Variables

Detailed Description

Function Documentation

◆ BitsSet()

◆ DCF77int()

◆ GetDCFdiff()

◆ GetPinState()

◆ Invalidate()

◆ PushBit()

Variable Documentation

◆ bitcnt

◆ DCFdiff

◆ DCFInSync

◆ dcfTicks

◆ hour

◆ lastPinState

◆ min

◆ minpulseReceived

◆ ms100max

◆ ms100min

◆ ms200max

◆ ms200min

◆ mspause59max

◆ mspause59min

◆ xorMask