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# 1  
Old 05-10-2011

hi guys

i need a program that can compare a value read from a com-port and one from the terminal.

can somebody help me???

using linux kernel 2.6.14-M5
can only use standard function in sh and bash...

Last edited by metal005; 05-10-2011 at 08:50 AM..
# 2  
Old 05-13-2011
# Set /dev/ttyS0 to 9600 baud, 8 bits(CS8), 1 stop bit(-cstopb)
stty -F /dev/ttyS0 9600 CS8 -cstopb 
# Read a line from /dev/ttyS0
read VAL1 < /dev/ttyS0
# Read a line from stdin
read VAL2

echo "Serial port gave ${VAL1}"
echo "Terminal gave ${VAL2}"

if [ "$VAL1" = "$VAL2" ]
        echo "Values are equal"
        echo "Values are not equal"

I'll need more detail from you about what's being read and how if you need more detail from me.
# 3  
Old 05-13-2011
the info from the cm-port will now be read by another programm

the data can be an number or a string...
if it is a string than you have given the wrong command to the other programm so that also has to be filtered out...

sorry for given detail after you have done the work :s
# 4  
Old 05-13-2011
By details I mean details, not nonanswers like "a number". Number in what format? ASCII? Binary? Hex? Does the whatever send carriage returns or newlines? What's on the serial port?
# 5  
Old 05-14-2011
may be Hex
# 6  
Old 05-16-2011
the value im getting from the serial port is ASCII and there is a newline at the end...

im getting my information from the com port from a fluke 45 dual display multimeter

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