CMU 2 cam with Vex

[Nathan]

Hi, one of my mentors wants me to hook up a CMU cam to a vex robot. But I'm not sure how to hook up power to it? Has anyone ever done this? Should I just hook a PWM cable from the camera to the vex controller?

Thanks for the help,
Nathan

[intellec7]

Originally Posted by Nathan

Hi, one of my mentors wants me to hook up a CMU cam to a vex robot. But I'm not sure how to hook up power to it? Has anyone ever done this? Should I just hook a PWM cable from the camera to the vex controller?

Thanks for the help,
Nathan

Try this thread

[Nathan]

Wow, thanks. Exactly what I needed!

[EHaskins]

Originally Posted by intellec7

Try this thread

I made that work a couple months ago. I used Kevin's camera code moved to a vex MPLab project.

[Nathan]

Where could I find Kevin's code? That would really help alot!

Thanks,
Nathan

[EHaskins]

www.kevin.org/frc

If you want any other help PM or e-mail me Haskinseric@hotmail.com.

EDIT: I tested my vex with the code in frc_camera_s.zip. It may work with version 2 and/or the full version of the code, but I know the first simple version works.

You will need to follow the instructions in the readme to move the code to an EDU/Vex robot. I know it says its for the EDU only, but the process to move it to a VEX is the same.

Also I was using the Radio Shack programming kit, but using MPLab IDE and IFI Loader. This will work with MPLab, but I don't think its possible with EasyC, because you wont have access to the serial ports.

Sorry for the long edit, but I thought of alot after I typed the my response.

Again, if you want any other help PM or e-mail me Haskinseric@hotmail.com.

EDIT Again: If you need a copy of the MPLab default code for a vex you can download it from http://www.vexlabs.com/vex-robotics-downloads.shtml. Here is a direct link to the file http://www.vexlabs.com/docs/vex-startup-code.zip. You can also get IFI loader from that page.

Hope this helps,

[Nathan]

Thanks! And I already use MPlab so that shouldn't be a problem. By "the first simple version" do you mean frc_camera.zip?

Thanks again,
Nathan

[EHaskins]

I used frc_camera_s.zip.

frc_camera_s.zip

EDIT: You do need a different version of the default code for a vex. The code from an FRC controller will NOT work. You can download it from the link in my post above.

[Nathan]

Eric's been helping me via e-mail (Thanks Eric!), and now I've gotten the cables all hooked up. But when I try to integrate Kevin's camera code, by adding "camera.c" and "camera.h" to my MPlab project, I get the following error:

Error - could not find definition of symbol 'Serial_Port_Two_Byte_Count' in file 'C:\VexCode\camera.o'.
Errors : 1

BUILD FAILED: Sat Nov 11 12:53:45 2006

And unfortunately I can't get it to go away... Any idea's why I'm getting this?

Thanks,
Nathan

[Mark McLeod]

That's defined in Kevin's serial_ports.c/h files.

Did you include those in your project?

[Nathan]

No, I didn't. I guess that was the problem, thanks Now, do I need to include the rest of the Kevin's .c/.h files to my project, or will just having the camera.c/h and serial_ports.c/h files be ok?

[EHaskins]

If you follow the instrustions in the Camera Readme, tracking readme, and the serial port readme. Your robot should be working in no time.

If you are planning to write your own tracking code you don't need to follow the tracking readme to integrate tracking.c/.h/

[Nathan]

Thanks. And I've been trying to read all the readme's/.c/.h files, and is this how you track an object:

Initialize_Camera();
Camera_Idle();
Track_Color();

Is that how you do it?

Thanks,
Nathan

[EHaskins]

If you have integrated the serial and camera code properly you can put this code in porcess_data_from_master_up

Camera_Handler();// this  updates the camera data.
Servo_Track();// this is in tracking.c, so you must include tracking.h.

You can look at the code in kevin's frc code, or the code I e-mailed you for a better explaination.

Feel free to e-mail me.