serial Port, what is wrong ?

Rainer Borchmann · Joined: 22 Nov 2007 Posts: 14

Hi,
please can anyone tell me what is wrong with this code ?
i have an oszilloskop on the COM1 ,and nothing comes out of it.
Rainer
VS2005
..............................
private void button1_Click(object sender, EventArgs e)

{

// Instantiate the communications // port with some basic settings

SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8,
StopBits.One);

// Open the port for communications

port.Open();

// Write a string

port.Write("Hello World");

//// Write a set of bytes

port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);

// Schliessen COM1

port.Close();

}

......................................

Thank you

Rainer

Archived from group: microsoft>public>dotnet>languages>csharp

Michael Rubinstein · Joined: 11 Aug 2007 Posts: 4

Hi Rainer. After issuing port.Open() I would check if it is open.

if (port.IsOpen)
{
port.Write("Hello World") // "Hello World\r" ???
port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);
port.Close();
}
else
System.Media.SystemSounds.Asterisk.Play() //cry

Also, make sure that you use the right port. In newer machines it is quire
rare having a serial connector associated with COM1.

Michael

"Rainer Borchmann" wrote in message
news:%23fZ$JoLPIHA.3532@TK2MSFTNGP04.phx.gbl...
> Hi,
> please can anyone tell me what is wrong with this code ?
> i have an oszilloskop on the COM1 ,and nothing comes out of it.
> Rainer
> VS2005
> .............................
> private void button1_Click(object sender, EventArgs e)
>
> {
>
> // Instantiate the communications // port with some basic settings
>
> SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8,
> StopBits.One);
>
> // Open the port for communications
>
> port.Open();
>
> // Write a string
>
> port.Write("Hello World");
>
> //// Write a set of bytes
>
> port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);
>
> // Schliessen COM1
>
> port.Close();
>
> }
>
> .....................................
>
> Thank you
>
> Rainer
>
>
>
>
>
>
>
>
>
>

Rainer Borchmann · Joined: 22 Nov 2007 Posts: 14

"Michael Rubinstein" schrieb im Newsbeitrag @mid.individual.net...
> Hi Rainer. After issuing port.Open() I would check if it is open.
>
> if (port.IsOpen)
> {
> port.Write("Hello World") // "Hello World\r" ???
> port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);
> port.Close();
> }
> else
> System.Media.SystemSounds.Asterisk.Play() //cry
>
> Also, make sure that you use the right port. In newer machines it is quire
> rare having a serial connector associated with COM1.
>
> Michael

Hi Michel,
its well to have you as an good angel here in this newsgroup. And i got my
error. i have to send a RTS and a DTR signal to the Datacollecting station.
The working code ist here:

Button Senden

SerialPort sp = new SerialPort("COM8", 9600, Parity.None, 8, StopBits.One);

sp.WriteBufferSize = 2048;

sp.ReadBufferSize = 2048;

//sp.Encoding = Encoding.ASCII;

sp.Open();

sp.RtsEnable = true ;

sp.DtrEnable = true;

// Messsode Aufwecken

sp.Write(new byte[] {0x00,0x00,0x00 }, 0, 3);

//sp.ReadTimeout = 500 ;

sp.DtrEnable = false;

sp.Close();

// Button Senden Ende

Michael Rubinstein · Joined: 11 Aug 2007 Posts: 4

Glad you solved your problem. Must be legacy hardware you are working
with - using RTS DTR signals. C# Serial class is pretty good. You can easily
write your own Serial Terminal for testing or troubleshooting.

Michael

"Rainer Borchmann" wrote in message
news:%23Dsyg9YPIHA.5720@TK2MSFTNGP04.phx.gbl...
>
> "Michael Rubinstein" schrieb im
> Newsbeitrag @mid.individual.net...
>> Hi Rainer. After issuing port.Open() I would check if it is open.
>>
>> if (port.IsOpen)
>> {
>> port.Write("Hello World") // "Hello World\r" ???
>> port.Write(new byte[] { 0x0A, 0xE2, 0xFF }, 0, 3);
>> port.Close();
>> }
>> else
>> System.Media.SystemSounds.Asterisk.Play() //cry
>>
>> Also, make sure that you use the right port. In newer machines it is
>> quire rare having a serial connector associated with COM1.
>>
>> Michael
>
> Hi Michel,
> its well to have you as an good angel here in this newsgroup. And i got my
> error. i have to send a RTS and a DTR signal to the Datacollecting
> station.
> The working code ist here:
>
>
>
>
>
> Button Senden
>
>
>
> SerialPort sp = new SerialPort("COM8", 9600, Parity.None, 8,
> StopBits.One);
>
>
>
>
>
>
>
> sp.WriteBufferSize = 2048;
>
> sp.ReadBufferSize = 2048;
>
> //sp.Encoding = Encoding.ASCII;
>
>
>
>
>
> sp.Open();
>
> sp.RtsEnable = true ;
>
> sp.DtrEnable = true;
>
>
>
>
>
> // Messsode Aufwecken
>
> sp.Write(new byte[] {0x00,0x00,0x00 }, 0, 3);
>
>
>
>
>
> //sp.ReadTimeout = 500 ;
>
>
>
> sp.DtrEnable = false;
>
>
>
>
>
> sp.Close();
>
>
>
> // Button Senden Ende
>
>
>
>
>
>
>
>
>
>

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