© MCS Electronics, 1995-2007

Do

Incr Tel

Print Tel;" test serial port 1"

Print#1 ,Tel;" test serial port 2"

Print#2 ,Tel;" test serial port 3"

Print#3 ,Tel;" test serial port 4"

B= Inkey(#3)

IfB <> 0Then

Print#3 ,B ;" from port 4"

End If

Waitms 500

Loop

Close#1

Close#2

Close#3

End

CONFIG DATE

Action

Configure the Format of the Date String for Input to and Output fromBASCOM – Date functions

Syntax

CONFIG DATE = DMY , Separator = char

Remarks

The following table shows the common formats of date and the associated statements.

When you live in Holland you would use :

CONFIG DATE = DMY, separator = -

This would print 24-04-02 for 24 November 2002.

page -330-

© MCS Electronics, 1995-2007

When you line in the US, you would use :

CONFIG DATE = MDY , separator = /

This would print 04/24/02 for 24 November 2002.

See also

CONFIG CLOCK , DATE TIME functions , DayOfWeek , DayOfYear , SecOfDay , SecElapsed , SysDay , SysSec , SysSecElapsed , Time , Date

Example

'-----------------------------------------------------------------------------

------------

'With the 8535 and timer2 or the Mega103 and TIMER0 you can 'easily implement a clock by attaching a 32768 Hz xtal to the timer 'And of course some BASCOM code

'This example is written for the STK300 with M103

Enable Interrupts

simple it is

'The above statement will bind in an ISR so you can not use the TIMER anymore! 'For the M103 in this case it means that TIMER0 can not be used by the user anymore

'assign the date to the reserved date$

page -331-

© MCS Electronics, 1995-2007

'The format is MM/DD/YY Date$ = "11/11/00"

'assign the time, format in hh:mm:ss military format(24 hours)

'You may not use 1:2:3 !! adding support for this would mean overhead 'But of course you can alter the library routines used

'The clock routine does use the following internal variables: '_day , _month, _year , _sec, _hour, _min

'These are all bytes. You can assign or use them directly _day = 1

'For the _year variable only the year is stored, not the century

End

CONFIG DCF77

Action

Instruct the compiler to use DCF-77 radio signal to get atom clock precision time

Syntax

CONFIG DCF77 = pin , timer = timer [ INVERTED=inv, CHECK=check, UPDATE=upd, UPDATETIME=updtime , TIMER1SEC=tmr1sec, SWITCHPOWER=swpwr, POWERPIN=pin, POWERLEVEL = pwrlvl , SECONDTICKS=sectick ,DEBUG=dbg ]

Remarks

page -332-

© MCS Electronics, 1995-2007

POWERLEVEL This option controls the level of the output pin that will result in a power ON for the module.

0 - When a logic 0 is applied to the power pin, the module is ON. 1 - When a logic 1 is applied to the power pin, the module is ON.

Use a transistor to power the module. Do not power it froma port PIN directly. When you do power from a pin, make sure you sink the current. Ie : connect VCC to module, and GND of the module to ground. A logic 0 will then turn on the module.

The DCF decoding routines use a status byte. This byte can be examined as in the example. The bits have the following meaning.

Bit Explanation

0The last reading of the DCF pin.

1This bit is reserved.

2This Bit is set, if after a complete time-stamp at second 58 the time-stamp is checked and it is OK. If after a minute mark (2 sec pause) this bit is set, the time from the DCF-Part is copied to the Clock-Part and this bit reset too. Every second mark also

page -333-

© MCS Electronics, 1995-2007

resets this bit. So time is only set, if after second 58 a minute mark follows. Normally this bit is only at value 1 from Second 58 to second 60/00.

3This Bit indicates, that the DCF-Part should be stopped, if time is set. (at the option of updating once per hour or day).

4This Bit indicated that the DCF-Part is stopped.

5This bit indicates, that the CLOCK is configured the way, that during DCF-Clock is stopped, there is only one ISR-Call in one second.

6This Bit determines the level of the DCF input-pin at the pulse (100/200 mSec part).

7This bit indicates, that the DCF-Part has set the time of the Clock-part.

You can read the Status-Bit 7 (DCF_Status.7), to check whether the internal clock was synchronized by the DCF-Part. You can also reset this Bit with RESET DCF_Status.7. The DCF-Part will set this bit again, if a valid time-stamp is received.

You can read all other bits, but don’t change them.

The DCF-77 signal is broadcasted by the German Time and Frequency department. The following information is copied from : http://www.ptb.de/en/org/4/44/_index.htm

The main task of the department time and frequency is the realization and dissemination of the base unit time (second) and the dissemination of the legal time in the Federal Republic of Germany.

The second is defined as the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom.

For the realization and dissemination of the unit of time, the department develops and operates caesium atomic clocks as primary standards of time and frequency. In the past decades, these, as the worldwide most accurate atomic clocks, have contributed to the international atomic time scale (TAI) and represent the basis for the legal time in Germany. Dissemination of the legal time to the various users in industry, society, and research is performed via satellite, via a low frequency transmitter DCF77 and via an internetand telephone service.

The department participates in the tests for the future European satellite navigation system „Gallileo“.

Presently the primary clocks realizing the time unit are augmented by Cs clocks with laser cooled atoms („Cs-fountain clocks“) whose accuracy presently exceeds the clocks with thermal beams by a factor of 10 (frequency uncertainty of 1 . 10-15).

Future atomic clocks will most likely be based on atomic transitions in the optical range of single stored ions. Such standards are presently being developed along with the means to relate their optical frequencies without errors to radio-frequencies or 1 second pulsed.

As one may expect transitions in nuclei of atoms to be better shielded from environmental perturbations than electron-shell transitions which have been used so far as atomic clock references, the department attempts to use an optical transition in the nucleus of 229Th for a future generation of atomic clocks.

The work of the department is complemented by research in nonlinear optics (Solitons) and precision time transfer techniques, funded in the frame of several European projects and by national funding by Deutsche Forschungsgemeinschaft particularly in the frame of Sonderforschungsbereich 407 jointly with Hannover University.

The following information is copied from wikipedia : http://en.wikipedia.org/wiki/DCF77

page -334-

© MCS Electronics, 1995-2007

The signal can be received in this area:

DCF77 is a longwave time signal and standard-frequency radio station. Its primary and backup transmitter are located in Mainflingen, about 25 km south-east of Frankfurt, Germany. It is operated by T-Systems Media Broadcast, a subsidiary of Deutsche Telekom AG, on behalf of the Physikalisch-Technische Bundesanstalt, Germany's national physics laboratory. DCF77 has been in service as a standard-frequency station since 1959; date and time information was added in 1973.

The 77.5 kHz carrier signal is generated from local atomic clocks that are linked with the German master clocks in Braunschweig. With a relatively-high power of 50 kW, the station can be received in large parts of Europe, as far as 2000 km from Frankfurt. Its signal carries an amplitude-modulated, pulse-width coded 1 bit/s data signal. The same data signal is also phase modulated onto the carrier using a 511-bit long pseudorandomsequence (direct-sequence spread spectrum modulation). The transmitted data repeats each minute Map showing the range of the DCF77 signal.

Map showing the range of the DCF77 signal.

*the current date and time;

*a leap second warning bit;

*a summer time bit;

*a primary/backup transmitter identification bit;

*several parity bits.

Since 2003, 14 previously unused bits of the time code have been used for civil defence emergency signals. This is still an experimental service, aimed to replace one day the German network of civil defense sirens.

The callsign stands for D=Deutschland (Germany), C=long wave signal, F=Frankfurt, 77=frequency: 77.5 kHz. It is transmitted three times per hour in morse code.

Radio clocks have been very popular in Europe since the late 1980s and most of them use the DCF77 signal to set their time automatically.

For further reference see wikipedia, a great on line information resource.

The DCF library parameters state diagram looks as following:

page -335-

© MCS Electronics, 1995-2007

page -336-

© MCS Electronics, 1995-2007

See also

CONFIG DATE

ASM

_DCF77 from DCF77.LBX is included by the compiler when you use the CONFIG statement.

Example

$regfile = "M88def.dat" $crystal = 8000000

$hwstack = 128 $swstack = 128 $framesize = 128

$baud = 19200

'Config Dcf77 = Pind.2 , Debug = 1 , Inverted = 0 , Check = 2 , Update = 0 , Updatetime = 30 , Switchpower = 0 , Secondticks = 50 , Timer1sec = 1 , Powerlevel = 1 , Timer = 1

Config Dcf77 = Pind.2 , Timer = 1 , Timer1sec = 1 , Debug = 1

Enable Interrupts

Config Date = Dmy , Separator = .

Dim I As Integer

Dim Sec_old As Byte , Dcfsec_old As Byte

' Testroutine für die DCF77 Clock

Print "Test DCF77 Version 1.00"

Do

For I = 1 To 78

Waitms 10

If Sec_old <> _sec Then

Exit For End If

If Dcfsec_old <> Dcf_sec Then

Exit For End If

Next Waitms 220

Sec_old = _sec Dcfsec_old = Dcf_sec

Print Time$ ; " " ; Date$ ; " " ; Time(dcf_sec) ; " " ; Date(dcf_day) ; " " ; Bin(dcf_status) ; " " ; Bin(dcf_bits) ; " " ; Bdcf_impuls ; " " ; Bdcf_pause

Loop

End

CONFIG DATE

page -337-