Writing to the serial port at 25 Hz

Hi.
I am doing a project where it is neassesary to send data to a dev board
with 25 Hz. The data is 4 byte that is read from an array. The settings
for the connection is as follow:
bps:9600
data bits:8
parity:none
stop bit:1
flow control:none

I have tried to read the documentation, but my english isn't quite good
enougth to understand it, and my networks the same. So if anyone would
help my writing an m-file that can do it, I would be very pleased
sincerly
Jeppe Holm

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