Using the UART/de - Revision history

Stefanhamburg: /* SOFTWARE UART */

2013-02-25T23:49:21Z

SOFTWARE UART

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Stefanhamburg: /* BUFFERING SERIAL DATA */

2013-02-25T23:21:45Z

BUFFERING SERIAL DATA

Stefanhamburg: /* ANOTHER EXAMPLE */

2013-02-25T23:12:48Z

ANOTHER EXAMPLE

Stefanhamburg: /* OVERVIEW */

2013-02-25T23:04:17Z

OVERVIEW

Stefanhamburg: /* CARRIAGE RETURN (CR) AND LINE FEED (LF) */

2013-02-25T22:58:22Z

CARRIAGE RETURN (CR) AND LINE FEED (LF)

Stefanhamburg: /* ASCII */

2013-02-25T22:42:45Z

ASCII

Stefanhamburg: /* Example */

2013-02-25T22:34:12Z

Example

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

2013-02-25T22:08:18Z

(**COPIED FROM ENGLISH PAGE**) =

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Admin: 1 revision

2013-02-15T19:05:58Z

1 revision

Admin at 16:34, 13 February 2013

2013-02-13T16:34:55Z

New page

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

A Universal Asynchronous Receiver and Transmitter (UART) can be used to send and receive data between two devices. More specific these devices can be PC-to-PC, PC-to-micro controller and micro controller-to-micro controller. The UART communicates using TTL voltages +5V and 0V or LVTTL depending on your micro controllers VCC voltage.

 

If you wish to connect to a PC you need to use RS232 protocol specifications. This means that the hardware communication is done with specific voltage levels. (+15V and -15V) This can be achieved by using a MAX232 level shifter.

 

The hardware is explained in this schematic:

 

[[File:Uart.png|center]]

 

The DB-9 connector has 9 pins but you only need to use 3 of them. Notice that the drawing above shows the FRONT VIEW thus remember that you are soldering on the other side. On most connectors the pin outs can also be found on the connector itself.

 

If your controller has no UART you can use a software UART see below. If your controller has one UART you connect controller pins TxD and RxD to TxD and RxD in the schematic above. If your controller has more than one UART you connect controller pins TxD0 and RxD0 to TxD and RxD in the schematic above.

You now need to initialize the program in your micro controller, open a new .bas file and add the following code in the beginning of your program.

 

$regfile = "your micro here def.dat"

$crystal = 8000000

$baud = 19200

 

Make sure to define your micro controller after $regfile for example if you use the ATMega32

$regfile = "m32def.dat"

 

Some new chips can use an internal oscillator, also some chips are configured to use the internal oscillator by default. Using an internal oscillator means you do not need an external crystal.

 

Perform this step only if you have an internal oscillator.

Open the BASCOM-AVR programmer like this:

[[File:Uart pg.png|center]]

 
<div style="padding: 0px; margin: 0px 0px 0px 11px;">
{| border="0" cellpadding="0" cellspacing="0"
|- valign="baseline" style="vertical-align: baseline;"
| width="13" | •
| Select the “Lock and Fuse Bits” tab and maximize the programmer window.
|}
</div><div style="padding: 0px; margin: 0px -84px 0px 11px;">
{| border="0" cellpadding="0" cellspacing="0"
|- valign="baseline" style="vertical-align: baseline;"
| width="13" | •
| Check if you see the following in the “Fusebit” section:
|}
</div>
  "1:Divide Clock by 8 Disabled"

  and

        "Int. RC Osc. 8 MHz; Start-up time: X CK + X ms; [CKSEL=XXXX SUT=XX]"

 

[[File:Uart fusebits.png|center]]

 

These options are not available for all AVR’s, if you don’t have the option do not change any fuse bits.

 

If these options are available, but in a wrong setting. Change the setting in the drop down box and click another Fuse section. Finally click the "Program FS"  button. Click "Refresh" to see the actual setting.

 

Now connect a straight cable between the DB-9 connector, micro controller side and the PC side.

Program a test program into your micro controller, it should look like this:

 

$regfile = "m32def.dat" 'Define your own

$crystal = 8000000                                        

$baud = 19200                                            

 

Do

 Print "Hello World"

Waitms 25

Loop

 

End

 

Now open the BASCOM-AVR Terminal and set your connection settings by clicking “Terminal” -> “Settings” Select your computers COM port and select baud 19200, Parity none, Data bits 8, Stop bits 1, Handshake none, emulation none.

 

[[File:Uart terminal.png]] [[File:Uart terminalshow.png]]

 

If you see the Hello World displayed in the BASCOM-AVR Terminal emulator window, your configuration is OK. Congratulations.

 

= Example =

You can also try this example with the BASCOM Terminal emulator, it shows you how to send and receive with various commands.

 

$regfile = "m88def.dat"

$crystal = 8000000

$baud = 19200

 

Dim Akey As Byte  'Here we declare a byte variable

 

Print

Print "Hello, hit any alphanumerical key..."

Akey = Waitkey()  'Waitkey waits untill a char is received from the UART

Print Akey

 

Wait 1

Print

Print "Thanks!, as you could see the controller prints a number"

Print "but not the key you pressed."

 

Wait 1

Print

Print "Now try the enter key..."

Akey = Waitkey()

Akey = Waitkey()

Print Akey

 

Print

Print "The number you see is the ASCII value of the key you pressed."

Print "We need to convert the number back to the key..."

Print     'Notice what this line does

Print "Please try an alphanumerical key again..."

Akey = Waitkey()

Print Chr(akey) 'Notice what this does

Print "That's fine!"

 

Wait 1

Print

Print "For a lot of functions, just one key is not enough..."

Print "Now type your name and hit enter to confirm"

 

Dim Inputstring As String * 12          'Declare a string variable here

 

 

Do

Akey = Waitkey()

If Akey = 13 Then Goto Thanks           'On enter key goto thanks

   Inputstring = Inputstring + Chr(akey) 'Assign the string

Loop

 

Thanks:

Print "Thank you " ; Inputstring ; " !"             'Notice what ; does

 

Wait 1

Print

Print "Take a look at the program code and try to understand"

Print "how this program works. Also press F1 at the statements"

Print

Print "If you understand everything continue to the next experiment"

 

End

 

= ASCII =

As you could have seen in the previous example we use the PRINT statement to send something to the UART. Actually we do not send just text. We send ASCII characters. ASCII means American Standard Code for Information Interchange. Basically ASCII is a list of 127 characters.

 

ASCII Table (Incomplete)

 

Decimal  Hex    Binary     Value

-------  ---    ------     -----

000    000   00000000      NUL    (Null char.)

008    008   00001000       BS    (Backspace)

009    009   00001001       HT    (Horizontal Tab)

010    00A   00001010       LF    (Line Feed)

012    00C   00001100       FF    (Form Feed)

013    00D   00001101       CR    (Carriage Return)

048    030   00110000        0

049    031   00110001        1

052    034   00110100        4

065    041   01000001        A

066    042   01000010        B

067    043   01000011        C

 

You can find a complete ASCII table [[ASCII_chart|here]]

 

= CARRIAGE RETURN (CR) AND LINE FEED (LF) =

In the previous example you can also see that a second print statement always prints the printed text to the following line. This is caused by the fact that the print statement always adds the CR and LF characters.

 

Basically if we state:

Print “ABC”

We send 65 66 67 13 10 to the UART. (In binary format)

 

The carriage return character (13) returns the cursor back to column position 0 of the current line. The line feed (10) moves the cursor to the next line.

 

Print “ABC” ;

When we type a semicolon ( ; ) at the end of the line...

Bascom does not send a carriage return/line feed, so you can print another text after the ABC on the same line.

 

Print “ABC” ; Chr(13) ;

This would send only ABC CR. The next print would overwrite the ABC.

 

= OVERVIEW =

Here are some other commands that you can use for UART communications:

 

Waitkey()

Waitkey will until a character is received in the serial buffer.

 

Ischarwaiting()

Returns 1 when a character is waiting in the hardware UART buffer.

 

Inkey()

Inkey returns the ASCII value of the first character in the serial input buffer.

 

Print

Sends a variable or non-variable string to the UART

 

 

 

= ANOTHER EXAMPLE =

This example shows how to use Ischarwaiting to test if there is a key pressed. And if there is, read to a variable.

 

'Print "Press B key to start"

Dim Serialcharwaiting As Byte, Serialchar As Byte

 

Serialcharwaiting = Ischarwaiting()   'Check if B or b pressed then goto

If Serialcharwaiting = 1 Then

 Serialchar = Inkey()

If Serialchar = 66 Or Serialchar = 98 Then

    Goto MyRoutine

End If

End If

 

Goto Main

 

Myroutine:

'Statements

 

Main:

'Statements

End

 

 

= BUFFERING SERIAL DATA =

If you wish to send and receive data at high speed, you need to use serial input and serial output buffers. This buffering is implemented in BASCOM-AVR and can only be used for hardware UART’s.

 

To configure a UART to use buffers, you need to use the Config statement.

 

Config Serialout = Buffered , Size = 20

and/or

Config Serialin = Buffered , Size = 20

 

More information can be found in BASCOM-Help. Search topic = "[[CONFIG_SERIALIN|config serialin"]]. There is also a sample program “RS232BUFFER.BAS” in the samples folder if you wish a demonstration of the buffering.

 

 

= SOFTWARE UART =

The previous examples used the hardware UART. That means the compiler uses the internal UART registers and internal hardware (RxD(0) and TxD(0)) of the AVR. If you don’t have a hardware UART you can also use a software UART.

 

The Bascom compiler makes it easy to “create” additional UART’s. Bascom creates software UART’s on virtually every port pin.  

 

Remember that a software UART is not as robust as a hardware UART, thus you can get timing problems if you have lots of interrupts in your program.

 

For this example we use micro controller pins portc.1 and portc.2.

Connect portc.1 to TxD and portc.2 to RxD see the schematic above.

 

Change the $regfile and program this example:

 

$regfile = "m88def.dat"

$crystal = 8000000

$baud = 19200

 

Dim B As Byte

Waitms 100

 

'Open a TRANSMIT channel for output

Open "comc.1:19200,8,n,1" For Output As #1

Print #1 , "serial output"

 

'Now open a RECEIVE channel for input

Open "comc.2:19200,8,n,1" For Input As #2

'Since there is no relation between the input and output pin

'there is NO ECHO while keys are typed

 

Print #1 , "Press any alpha numerical key"

 

'With INKEY() we can check if there is data available

'To use it with the software UART you must provide the channel

Do

   'Store in byte

   B = Inkey(#2)

   'When the value > 0 we got something

   If B > 0 Then

      Print #1 , Chr(b)                         'Print the character

   End If

Loop

Close #2                                         'Close the channels

Close #1

 

End

 

After you have programmed the controller and you connected the serial cable, open the terminal emulator by clicking on [[File:Terminal-icon.png]] in Bascom.

You should see the program asking for an alphanumerical input, and it should print the input back to the terminal.

{{Languages}}

[[Category:BASCOM_HARDWARE/de]]

@@ Line 412: / Line 412: @@
 = <span class="f_Header">BUFFERING SERIAL DATA</span> =
-If you wish to send and receive data at high speed, you need to use serial input and serial output buffers. This buffering is implemented in BASCOM-AVR and can only be used for hardware UART’s.
+Wenn Sie mit hoher Geschwindigkeit senden und empfangen wollen dann müssen Sie serielle Input und serielle Output Puffer verwenden. Das Puffern wurde in BASCOM implementiert und kann nur mit Hardware UARTs verwendet werden.
 <span style="font-family: Arial;">&nbsp;</span>
-To configure a UART to use buffers, you need to use the Config statement.
+Um einen UART für Pufferung zu konfigurieren muss der CONFIG Befehl benutzt werden.
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 422: / Line 422: @@
 <span style="font-weight: bold; color: rgb(0, 0, 129);">Config&nbsp;</span>Serialout&nbsp;<span style="color: rgb(255, 0, 0);">=&nbsp;</span>Buffered&nbsp;<span style="color: rgb(255, 0, 0);">,&nbsp;</span>Size&nbsp;<span style="color: rgb(255, 0, 0);">=&nbsp;</span>20
-and/or
+und/oder
 <span style="font-weight: bold; color: rgb(0, 0, 129);">Config&nbsp;</span>Serialin&nbsp;<span style="color: rgb(255, 0, 0);">=&nbsp;</span>Buffered&nbsp;<span style="color: rgb(255, 0, 0);">,&nbsp;</span>Size&nbsp;<span style="color: rgb(255, 0, 0);">=&nbsp;</span>20
@@ Line 428: / Line 428: @@
 <span style="font-family: Arial;">&nbsp;</span>
-More information can be found in BASCOM-Help. Search topic = "[[CONFIG_SERIALIN|config serialin"]]. There is also a sample program “RS232BUFFER.BAS” in the samples folder if you wish a demonstration of the buffering.
+Mehr Informationen finden Sie in der BASCOM-Hilfe. Suchen Sie nach  "[[CONFIG_SERIALIN|config serialin"]]. Es gibt auch ein Beispielprogramm  “RS232BUFFER.BAS” im Samples-Verzeichnis.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 361: / Line 361: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">ANOTHER EXAMPLE</span> =
+= <span class="f_Header">Ein weiiteres Beispiel</span> =
 <span style="font-family: Arial;">&nbsp;</span>
-<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Print "Press B key to start"</span>
+<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Print "Tippen Sie die Taste B um zu starten"</span>
 <span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Dim</span><span style="font-family: 'Courier New';">&nbsp;Serialcharwaiting&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">As</span><span style="font-family: 'Courier New';">&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Byte</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">,</span><span style="font-family: 'Courier New';">&nbsp;Serialchar&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">As</span><span style="font-family: 'Courier New';">&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Byte</span>
@@ Line 373: / Line 374: @@
 <span style="font-family: 'Courier New';">&nbsp;</span>
-<span style="font-family: 'Courier New';">Serialcharwaiting&nbsp;</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">=</span><span style="font-family: 'Courier New';">&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Ischarwaiting</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">()</span><span style="font-family: 'Courier New';">&nbsp;&nbsp;&nbsp;</span><span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Check if B or b pressed then goto</span>
+<span style="font-family: 'Courier New';">Serialcharwaiting&nbsp;</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">=</span><span style="font-family: 'Courier New';">&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Ischarwaiting</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">()</span><span style="font-family: 'Courier New';">&nbsp;&nbsp;&nbsp;</span><span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Prüfen, ob B oder b gedrückt wurde. Dann goto</span>
 <span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">If</span><span style="font-family: 'Courier New';">&nbsp;Serialcharwaiting&nbsp;</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">=</span><span style="font-family: 'Courier New';">&nbsp;1&nbsp;</span><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Then</span>
@@ Line 395: / Line 396: @@
 <span style="font-family: 'Courier New';">Myroutine:</span>
-<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Statements</span>
+<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Anweisungen</span>
 <span style="font-family: 'Courier New';">&nbsp;</span>
@@ Line 401: / Line 402: @@
 <span style="font-family: 'Courier New';">Main:</span>
-<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Statements</span>
+<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'Anweisungen</span>
 <span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">End</span>

@@ Line 327: / Line 327: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">OVERVIEW</span> =
+= <span class="f_Header">Übersicht</span> =
-Here are some other commands that you can use for UART communications:
+Hier finden Sie einige Befehle, die in Zusammenhang mit UART-Kommunikation benutzt werden können:
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 335: / Line 335: @@
 <span style="font-family: Courier; font-weight: bold; color: rgb(0, 0, 128);">Waitkey</span><span style="font-family: Courier; color: rgb(255, 0, 0);">()</span>
-Waitkey will until a character is received in the serial buffer.
+Waitkey wartet bis ein Zeichen im seriellen Puffer empfangen wird.
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 341: / Line 341: @@
 <span style="font-family: Courier; font-weight: bold; color: rgb(0, 0, 128);">Ischarwaiting</span><span style="font-family: Courier; color: rgb(255, 0, 0);">()</span>
-Returns 1 when a character is waiting in the hardware UART buffer.
+Gibt eine 1 zurück wenn ein Zeichen im Hardware UART Puffer ansteht.
 &nbsp;
@@ Line 347: / Line 347: @@
 <span style="font-family: Courier; font-weight: bold; color: rgb(0, 0, 128);">Inkey</span><span style="font-family: Courier; color: rgb(255, 0, 0);">()</span>
-Inkey returns the ASCII value of the first character in the serial input buffer.
+Inkey gibt den ASCII-Wert des ersten Zeichens aus dem seriellen Eingabe-Puffer zurück.
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 353: / Line 353: @@
 <span style="font-family: Courier; font-weight: bold; color: rgb(0, 0, 128);">Print</span>
-Sends a variable or non-variable string to the UART
+Sendet eine variable oder eine konstante Zeichenkette zum UART.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 295: / Line 295: @@
 <span style="font-family: Arial;">&nbsp;</span>
-= <span class="f_Header">CARRIAGE RETURN (CR) AND LINE FEED (LF)</span> =
+= <span class="f_Header">CARRIAGE RETURN (CR) UND LINE FEED (LF)</span> =
-In the previous example you can also see that a second print statement always prints the printed text to the following line. This is caused by the fact that the print statement always adds the CR and LF characters.
+Im vorigen Beispiel konnten Sie auch sehen, dass ein weiterer PRINT Befehl den Text in die nächste Zeile schreibt. Das kommt dadurch, dass der PRINT Befehl immer auch die CR und LF Zeichen anhängt uns ausgibt.
 <span style="font-family: Arial;">&nbsp;</span>
-Basically if we state:
+Wenn wir schreiben:
 <span style="font-family: 'MS Reference Sans Serif'; font-weight: bold; color: rgb(0, 0, 128);">Print</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(0, 128, 128);">“ABC”</span>
-We send 65 66 67 13 10 to the UART. (In binary format)
+dann senden wir 65 66 67 13 10 to the UART. (Im Binär-Format)
 <span style="font-family: Arial;">&nbsp;</span>
-The carriage return character (13) returns the cursor back to column position 0 of the current line. The line feed (10) moves the cursor to the next line.
+Das Carriage Return Zeichen (13) bewegt die Schreibmarke zurück zur Position 0 der aktuellen Zeile. Das line feed (10) bewegt die Schreibmarke in die nächste Zeile.
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 315: / Line 315: @@
 <span style="font-family: 'MS Reference Sans Serif'; font-weight: bold; color: rgb(0, 0, 128);">Print</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(0, 128, 128);">“ABC”</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(255, 0, 0);">;</span>
-When we type a semicolon (&nbsp;; ) at the end of the line...
+Wenn wir ein Semikolon (;) am Ende der Zeile benutzen ...
-Bascom does not send a carriage return/line feed, so you can print another text after the ABC on the same line.
+sendet BASCOM kein carriage return/line feed so dass man weiteren Text nach dem ABC auf der selben Zeile schreiben kann.
 <span style="font-family: Arial;">&nbsp;</span>
@@ Line 323: / Line 323: @@
 <span style="font-family: 'MS Reference Sans Serif'; font-weight: bold; color: rgb(0, 0, 128);">Print</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(0, 128, 128);">“ABC”</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(255, 0, 0);">;</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold;">&nbsp;</span><span style="font-family: 'MS Reference Sans Serif'; font-weight: bold; color: rgb(0, 0, 128);">Chr</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(255, 0, 0);">(</span><span style="font-family: 'MS Reference Sans Serif';">13</span><span style="font-family: 'MS Reference Sans Serif'; color: rgb(255, 0, 0);">)&nbsp;;</span>
-This would send only ABC CR. The next print would overwrite the ABC.
+Das würde nur ABC CR senden. Der nachfolgende Text würde das ABC überschreiben.
 <span style="font-family: Arial;">&nbsp;</span>

@@ Line 253: / Line 253: @@
 = <span class="f_Header">ASCII</span> =
-As you could have seen in the previous example we use the PRINT statement to send something to the UART. Actually we do not send just text. We send ASCII characters. ASCII means American Standard Code for Information Interchange. Basically ASCII is a list of 127 characters.
+Wie Sie im vorigen Beispiel gesehen haben benutzen wir den PRINT Befehl um irgendetwas zur UART zu senden. Genaugenommen senden wir nicht einfach Text sondern wir senden ASCII-Zeichen. ASCII heißt American Standard Code for Information Interchange. ASCII ist eine Tabelle mit 127 Zeichen.
 <span style="font-family: Arial;">&nbsp;</span>
-<span style="font-family: 'Courier New';">ASCII Table (Incomplete)</span>
+<span style="font-family: 'Courier New';">ASCII Tabelle (unvollständig)</span>
 <span style="font-family: Arial;">&nbsp;</span>
-<span style="font-family: 'Courier New';">Decimal &nbsp;Hex &nbsp; &nbsp;Binary &nbsp; &nbsp; Value</span>
+<span style="font-family: 'Courier New';">Dezimal &nbsp;Hex &nbsp; &nbsp;Binär &nbsp; &nbsp; Wert</span>
 <span style="font-family: 'Courier New';">------- &nbsp;--- &nbsp; &nbsp;------ &nbsp; &nbsp; -----</span>
@@ Line 291: / Line 291: @@
 <span style="font-family: Arial;">&nbsp;</span>
-You can find a complete ASCII table&nbsp;[[ASCII_chart|here]]
+Die vollständige ASCII Tabelle finden Sie&nbsp;[[ASCII_chart|hier]]
 <span style="font-family: Arial;">&nbsp;</span>

Using the UART/de - Revision history

Stefanhamburg: /* SOFTWARE UART */

Stefanhamburg: /* BUFFERING SERIAL DATA */

Stefanhamburg: /* ANOTHER EXAMPLE */

Stefanhamburg: /* OVERVIEW */

Stefanhamburg: /* CARRIAGE RETURN (CR) AND LINE FEED (LF) */

Stefanhamburg: /* ASCII */

Stefanhamburg: /* Example */

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

Admin: 1 revision

Admin at 16:34, 13 February 2013

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