PCI Serial Port testing

[Karl Larsen]

On 03/09/2010 11:33 PM, Nils Kassube wrote:
> Karl Larsen wrote:
>    
>>           My question is, how do I test this serial port? I am not
>>   sure which port is being used, /dev/ttyS0 - /dev/ttyS3. I want to
>>   send something from the computer side to the serial port but don't
>>   know how to do it.
>>      
> setserial -g /dev/ttyS*
>
> should give you the information which port is found by the kernel. Only
> the port with an entry "UART: 16550A" (the number may be different
> depending on the chip) is used. If it says "UART: unknown" for a
> particular port, that port isn't available. You can use the program
> minicom on both ends to test the comunication.
>
>
> Nils
>
>    
     Thanks Nils, I went through a learning process. I got out my good 
digital voltmeter and on Google figured out which pins had what and 
verified the rs232 voltages were there, after apt-get setserial I set 
the paths to 115200 baud as on web page said this pci card requires. It 
does require this. This device is on /dev/ttyS1. Then discovered I 
needed to set the voltage on the card to zero volts to make my serial 
port happy.

     The Oxford Semiconductor Ltd pci serial card is now working fine.


73 Karl