Misc with Axon and Sabertooth

[taba93]

Hi all,

I would like only to know if this method could teorically work.
I have the Axon and the Sabertooth 2x10 motor controller.
I have connected the Uart2 Tx Pin to the S1 port of the Sabertooth and the G Pin to the 0V port of the Sabertooth. I have set the switches of the Axon with the same method of page 13 of the Sabertooth datasheet -> http://www.dimensionengineering.com/datasheets/Sabertooth2x10.pdf (the 38400 baud rate) and I've written this simple code:

Eurex_rr.c file:


//SoR Include
#include "SoR_Utils.h" //includes all the technical stuff
#include "hardware.c" //declare hardware variables and ports
//#include "CMUcam.c" //not yet written
#include "sensors.c" //sensor libraries for sonar, sharp IR, etc.
#include "misc.c" //includes libraries for various hardware and other useful stuff
#include "axon_DAQ.c" //use the Axon like a data acquisition device
//#include "Blackfin_Axon.c" //files for Blackfin Robot camera
#include "control.c" //your code goes in here
//#include "servo_controller.c" //Axon servo controller
//#include "axon_test.c" //include this is doing a function test for the Axon
//#include "axon_oscope_test.c" //include this is doing a function test for the Axon


int main(void)
   {
         while (1 == 1){
          sabertooth (40,179);
         }
         }

and I compile it in a hex file and I must now only upload it to the Axon microcontroller. Is this going to work?
Thank you, bye bye

[Admin]

I have set the switches of the Axon with the same method of page 13 of the Sabertooth datasheet

Axon doesn't have switches
(I know what you meant, just making fun thats all )

while (1 == 1)

should be:
while(1)


Otherwise on quick glance it all looks fine.

[taba93]

Yeah I know!  I'll try and I will tell you later!

[taba93]

I tried it today. First I've uploaded to the Axon the axon_tst.hex file to try the UART ports and it all looks fine cause the motor began to move (this means that the connections are fine).
After that, I compiled my "Eurex_rr.c" file doing "Build" in Avr Studio and I've upload it to the axon. The result was that the motors didn't move. First I thought that I've done some errors in my file or in the "misc.c" file but there were no errors. So I tried to put in my code this line: "LED_on();" only to know if it works but the led didn't turn on and I don't know why.
Are there some errors?  bye

[Invicta]

taba93

I could not help but notice that you have an INCLUDE line:

#include "control.c" //your code goes in here

I could be wrong but is not "control.c" the default example source file. You have created your own file "Eurex_rr.c" which replaces "control.c". Therefore to have it as in INCLUDE may be causing some confusion.

Hope this helps

Invicta

[taba93]

Hi invicta,
I tried this but it doesn't work. What I'm doing wrong?
@Admin only to know is it possible to have the source of the axon_tst.hex file (I mean the c file?) cause if I upload this file it works!
Thank you

[taba93]

I forgot to say a thing. In my opinion the problem is the code (but it is strange cause you say me that should work) or the compilation but that seem to work too!

[Admin]

Put various rprintf("testA");'s in various places. This will tell you where your code stopped working.

Also, add a 50ms delay after
          sabertooth (40,179);

[taba93]

Ok , I'll try, but it is really strange, cause if I do only an easy thing like:

while(1){
           LED_on();
}

it doesn't work!

[Admin]

Does the demo code that comes with the Axon work fine?

When you check it with a multimeter, everything works fine? Are you sure you are uploading the correct .hex file?

[taba93]

Which demo code? I only upload the various precompiled programs from this site to the axon and they work. When I go in hyperterminal for example I receive the rprintf results of the axon_tst.hex file.
When I check it with a multimeter it doesn't work at all if I upload my compiled file. If I upload instead one of your compiled programs it works perfectly.

[Admin]

Start with the demo photovore code, then selectively modify it to match what you want.

I just noticed you aren't initializing the UART, you aren't initializing timers, nor are you configuring ports.

When I check it with a multimeter it doesn't work at all if I upload my compiled file.

What do you mean? Is the voltage 5V and the battery something higher?

[taba93]

1. ok I'll try. I must initialize ports using the function configuration_ports(); or something like that? (I don't remember the name precisly  )
2. nono, the UART port (for example) is 0V...instead with your precompiled program the voltage is 5V!

thank you a lot!

[taba93]

Ok, now it works! thanks for the help. Happy holidays!