$CRYSTAL/de - Revision history

Stefanhamburg: /* Example */

2013-02-18T00:06:24Z

Example

Stefanhamburg: /* See also */

2013-02-18T00:06:03Z

Stefanhamburg: /* Remarks */

2013-02-18T00:05:41Z

Remarks

Stefanhamburg: /* (COPIED FROM ENGLISH PAGE) = */

2013-02-17T23:45:26Z

(**COPIED FROM ENGLISH PAGE**) =

Admin: 1 revision

2013-02-15T19:06:49Z

1 revision

Admin: Created page with "= Action
= Instruct the compiler to override the crystal frequency options setting. &n..."

2013-01-31T20:06:46Z

Created page with "= Action = Instruct the compiler to override the crystal frequency options setting. &n..."

New page

== (**COPIED FROM ENGLISH PAGE**) === Action =

Instruct the compiler to override the crystal frequency options setting.

 

 

= Syntax =

$CRYSTAL = var

 

 

= Remarks =
<div style="text-align: left; text-indent: 0px; padding: 0px 0px 0px 0px; margin: 0px 0px 0px 4px">
{| style="border: solid 2px #000000; border-spacing:0px; border-collapse: collapse" border="1" cellpadding="1" cellspacing="0" width="604"
|- style="text-align:left; vertical-align:top"
| style="width:13%; border: solid 1px #000000" valign="top" width="13%" |
var

| style="width:100%; border: solid 1px #000000" valign="top" width="100%" |
A numeric constant with the Frequency of the crystal.

|}
</div>
 

The frequency is selectable from the [[Options Compiler Communication]]. It is stored in a configuration file. The $CRYSTAL directive overrides this setting.

It is best to use the $CRYSTAL directive as the used crystal frequency is visible in your program that way.

 

[[File:Notice.jpg|left|Notice.jpg]] The $CRYSTAL directive only informs the compiler about the used frequency. It does not set any fuse bit. The frequency must be know by the compiler for a number of reasons. First when you use serial communications, and you specify [[$BAUD]], the compiler can calculate the proper settings for the UBR register. And second there are a number of routines like [[WAITMS]], that use the execution time of a loop to generate a delay. When you specify $CRYSTAL = 1000000 (1 MHz) but in reality, connect a 4 MHz XTAL, you will see that everything will work 4 times as quick.

 

Most new AVR chips have an internal oscillator that is enabled by default. Check the data sheet for the default value.

 

 

= See also =

[[$BAUD]] , [[BAUD]] , [[CONFIG CLOCKDIV|CONFIG CLOCKDIV]]

 

 

= Example =

<source lang="bascomavr">
$regfile = "m48def.dat"
$crystal = 4000000
$baud = 19200

Config Com1 = Dummy , Synchrone = 0 , Parity = None , Stopbits = 1 , Databits = 8 , Clockpol = 0

Print "Hello world"
End
</source> {{Languages}}

[[Category:BASCOM_Language_Reference/de]]

@@ Line 53: / Line 53: @@
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-= <span class="f_Header">Example</span><br/> =
+= <span class="f_Header">Beispiel</span><br/> =
 <source lang="bascomavr">

@@ Line 45: / Line 45: @@
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-= <span class="f_Header">See also</span><br/> =
+= <span class="f_Header">Siehe auch</span><br/> =
 [[$BAUD]] , [[BAUD]] , [[CONFIG CLOCKDIV|CONFIG CLOCKDIV]]

@@ Line 15: / Line 15: @@
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-= <span class="f_Header">Remarks</span><br/> =
+= <span class="f_Header">Anmerkungen</span><br/> =
 <div style="text-align: left;  text-indent: 0px;  padding: 0px 0px 0px 0px;  margin: 0px 0px 0px 4px">
 {| style="border: solid 2px #000000;  border-spacing:0px;  border-collapse: collapse" border="1" cellpadding="1" cellspacing="0" width="604"
@@ Line 23: / Line 23: @@
 | style="width:100%;  border: solid 1px #000000" valign="top" width="100%" |
-A numeric constant with the Frequency of the crystal.
+Taktfrequenz als numerische Konstante.
 |}
@@ Line 29: / Line 29: @@
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-The frequency is selectable from the [[Options Compiler Communication]]. It is stored in a configuration file. The $CRYSTAL directive overrides this setting.
+Die Frequenz ist einstellbar in [[Options Compiler Communication]]. Sie wird in einer Konfigurationsdatei gespeichert. Die $CRYSTAL Direktive überschreibt diese Einstellung.
-It is best to use the $CRYSTAL directive as the used crystal frequency is visible in your program that way.
+Es ist sinnvoll, die $CRYSTAL Direktive im Programm zu benutzen weil dadurch die verwendete Frequenz deutlich wird.
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-[[File:Notice.jpg|left|Notice.jpg]]&nbsp;The $CRYSTAL directive only informs the compiler about the used frequency. It does not set any fuse bit. The frequency must be know by the compiler for a number of reasons. First when you use serial communications, and you specify [[$BAUD]], the compiler can calculate the proper settings for the UBR register. And second there are a number of routines like [[WAITMS]], that use the execution time of a loop to generate a delay. When you specify $CRYSTAL = 1000000 (1 MHz) but in reality, connect a 4 MHz XTAL, you will see that everything will work 4 times as quick.
+[[File:Notice.jpg|left|Notice.jpg]]&nbsp;Die $CRYSTAL Direktive teilt dem Compiler lediglich die Frequenz mit. Sie setzt kein Fuse-Bit. Die Frequenz muss dem Compiler aus verschiedenen Gründen bekannt sein. Erstens kann der Compiler bei Verwendung serieller Kommunikation und Spezifizierung von [[$BAUD]] den passenden Wert für das UBR-Register berechnen. Zweitens gibt es einige interne Routinen wie zum Beispiel [[WAITMS]] die die Ausführungszeiten von Schleifen nutzen um Wartezeiten zu erzeugen. Wenn $CRYSTAL = 1000000 (1 MHz) im Programm steht aber in Wirklichkeit ein 4 MHz Takt angeschlossen ist dann kann man feststellen, dass alles 4 mal schneller läuft.
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>
-Most new AVR chips have an internal oscillator that is enabled by default. Check the data sheet for the default value.
+Die meisten neueren AVR Mikrocontroller haben einen internen Oszillator der standardmäßig aktiviert ist. Die Standardeinstellungen stehen im jeweiligen Datenblatt.
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>

@@ Line 1: / Line 1: @@
-== (**COPIED FROM ENGLISH PAGE**) === <span class="f_Header">Action</span><br/> =
+= <span class="f_Header">Funktion</span><br/> =
-Instruct the compiler to override the crystal frequency options setting.
+Compileranweisung zum Überschreiben der Standard-Taktfrequenz aus den BASCOM-Optionen.
 <span style="font-family: 'Arial';  color: #000000">&nbsp;</span>