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From: Dan Lesutis on 16 Apr 2010 22:01
Hey Guys,

I am working on a serial communications project. Trying to communicate with this device. http://www.pololu.com/catalog/product/1350
Link for user manual
http://www.pololu.com/docs/pdf/0J40/maestro.pdf

I want to write three bytes out. 255 0 245. Below is from the help manual

For example, if we wanted to set the target of servo 0 to its (configurable) neutral position, we
could send the following byte sequence:
in hex: 0xFF, 0x00, 0x7F
in decimal: 255, 0, 127

s=serial('com3')
fopen(s)
fwrite(s,[255 0 245],'uint8')
fclose

also tried
s=serial('com3')
fopen(s)
fwrite(s,[255],'uint8')
fwrite(s,[0],'uint8')
fwrite(s,[245],'uint8')
fclose

My questions
How do I structure the data so it sends out the three data bytes? Do I need brackets?
Should I use int8 or uint8?
Does fwrite tack on a termination char like fprintf?

I've used this help file. http://cnx.org/content/m10821/latest/
The matlab help file on fwrite doesn't give any clear examples of writing out multiple data bytes.

Any help would be greatly appreciated

Thanks,
Dan
From: Dan Lesutis on 16 Apr 2010 22:49
I am also using this serial monitor program

http://www.serial-port-monitor.com/

The monitors sees matlab outputting my three bytes with the correct decimal values.
It also shows some funky text chars after my data

-Dan
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