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Unread 25-01-2006, 07:54
BradAMiller BradAMiller is offline
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Re: CMUCam TTL problems

Quote:
Originally Posted by gabrielse
I did what you suggested but I don't know how to interpret the results.

I created the code from Tutorial 7, added comments, and added the two code blocks you suggested (code attached).

It appears that the camera is never capturing a frame. This is the terminal output (also in attached zip file).

->
<-
->
<-
-> RM 1
<-
-> DM 20
<-
-> CR 41 128
<-
-> CR 19 32
<-
-> CR 42 128
<-
-> CR 43 32
<-
-> CR 45 132
<-
-> CR 18 32
<-
-> CR 0 0
<-
-> CR 1 128
<-
-> CR 2 128
<-
-> CR 3 128
<-
-> CR 6 1
<-
-> CR 16 1
<-
-> ST 85 115 15 17 10 145
<-
-> NF 1
<-
-> SM 12
<-
-> SP 16 8 5 30 15 5
<-
camera initialized
two wheel drive selected, left motor = PWM 1, right motor = PWM 2
Autonomous Mode commencing
-> TC
<-
camera started


No matter how long I wait I never get a message that the camera captured a frame.

I also noticed that the red light on the camera board (DS3) is always on. Should it be on?
There are no ACKs coming back from the camera. Can you try either cycling the power or holding down the reset on the robot controller for about 5 seconds and see if it starts working. You should see an ACK after each of those commands in your terminal window output.

Sometimes the camea seems to get into a state where it won't respond next time it is run. Give that a try and see if it starts working.
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Brad Miller
Robotics Resource Center
Worcester Polytechnic Institute