TMS320C6748: Generate a CLOCK signal

Hi Juan,

Could you elaborate a little:
- what are your requirements for frequency of the clock?
- do you need the TMS320C6748 to generate the clock or it will receive the clock from an external clock?
- what interface are you planning to use for your communication?

Best Regards,
Yordan

Hi Yordan,

- I'm not sure about the frecuency requirements yet, but no more than 10 MHz.
- Yes, I'm going to communicate two TMS320C6748 so one of them has to generate the clock (and be able to see that signal) and the other has to receive de signal. (Do you think it would be a better idea to use an external clock or something like that? if yes... could you give me an example?)
- I'm not sure about what you are asking, but i'm planning to short 10 GPIOs of one board to 10 GPIOs of the other so i could have 8 lines of data, 1 for the clock and 1 for strobe or osmething like that, i'm still figuring it out.

Thanks,
Juan

Ok Juan,

One option is to use some interface clock, but you should maybe need to add a piece of sw that keeps the interface (respectively the clock) running. This maybe least recommended.

Another option is to get the pwm outputs to continuously generate signal with 50% duty cycle. Again this requires sw configuration that keeps the pwm outputting signal for as long as your data transaction is active.

And the third option is to design your board so that it uses an external clock generator:
www.ti.com/.../overview.html

Best Regards,
Yordan

Hi,

i'll study the external clock idea.

About the other options...

What do you mean about interface clock?  doing it by code?

like:

if (count % 2)
    output = True;
else
    output = False;

About the pwm you mean using the eHPWM module? does that module keeps generating the PWM signal even when the main thread is doing other things?

Thanks,

Juan

ok, that's what i was thinking.
I'm going to think about the external hw clock generators.

Thanks Yordan,
Juan