Digi Neo Multiport serial card with SCO Openserver 5.07
Hi experts,
I hav a Digi Neo 8 port serial card installed in an HP Proliant ML310, running SCO Openserver 5.07 . Attached to the serial ports are 3 different laboratory instruments . My problem is the following : when sending data to the instruments via the serial port, the instrument only receives the first 56 bytes, rest is discarded. In recieving data from the instruments ther is no limit in the number of recieved bytes. Ports work properly when a teminal is attached to them.
A "cat" of a file to the port shows the same problem : only the first 56 bytes are transmitted.
I've contacted Digi internaitional support, they claim it's a flow control issue.
Anyone out there who has had or heard of such a problem before ?
I hav a Digi Neo 8 port serial card installed in an HP Proliant ML310, running SCO Openserver 5.07 . Attached to the serial ports are 3 different laboratory instruments . My problem is the following : when sending data to the instruments via the serial port, the instrument only receives the first 56 bytes, rest is discarded. In recieving data from the instruments ther is no limit in the number of recieved bytes. Ports work properly when a teminal is attached to them.
A "cat" of a file to the port shows the same problem : only the first 56 bytes are transmitted.
I've contacted Digi internaitional support, they claim it's a flow control issue.
Anyone out there who has had or heard of such a problem before ?
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Thanks for your effort anyway
hapee
hapee
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Hi,
Settings for /dev/tty1a and /dev/tty1nx (vi stty -a ...) are the same
I've tried to turn all flow control off, same result
When sending data (cat > /dev/tty...) to a terminal (emulatoin program) only the first 56 bytes are transmitted ...
Settings for /dev/tty1a and /dev/tty1nx (vi stty -a ...) are the same
I've tried to turn all flow control off, same result
When sending data (cat > /dev/tty...) to a terminal (emulatoin program) only the first 56 bytes are transmitted ...
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Yes, the terminal works perfectly on all ports
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I'm afraid that is not an option, or at least not immediately. I think I will try to change the cabling (shorcircuit all hardware flow control on the Digi Neo and the instrument side), since the loopback test also works.
I will let you know the results !
I will let you know the results !
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When running the same driver on the tty1a (the computer's own serial port) everything is ok.
There are no special characters in the transmitted strings, besides STX, ETX,CR,LF. Strings start with STX, end with ETX + checksum + CRLF. When the transmitted string length is less then 56 bytes, everything passes normally. (ASTM format for 2 instruments)