use of Base rate trigger

In the c2000 f28335, Base rate trigger use ? when i use this as timer 0, the model runs otherwise it says eror hgenerating binary output

[Venkatesh Chilapur]

Hi,

Let me know if you can provide the model.

Regards,

Venkatesh C

[Mohammad Tauquir Iqbal]

i cannot see the realtime data. moreover i cannot see anything in host communication used by Matlab video and getting an error when i am using closed-loop in the external mode.

[Mohammad Tauquir Iqbal]

the host communication

Answer 1

[Nivedita]

Hello Mohammad Tauquir Iqbal,

The Base rate trigger selects the interrupt source that runs the model's base-rate scheduler on the F28335.

For a normal time-based model, Timer 0 is usually the right choice. It uses a CPU timer interrupt to call the generated model step function periodically and does not depend on another peripheral interrupt.

Use another trigger source, such as ADC or ePWM, only if the model must run synchronously with that peripheral event. In that case, the selected peripheral must be configured to generate the interrupt used as the base-rate source.

If the model runs with the Timer 0 but fails during binary generation with another trigger source, check the following:

1. Confirm the selected peripheral, such as ADC or ePWM, is actually used and configured in the target model.
2. Confirm that the peripheral is configured to generate the interrupt selected as the Base rate trigger.
3. Make sure the model base sample time matches the interrupt/event rate.
4. Check that the same interrupt source is not being used or configured inconsistently by another block.
5. If host communication is used, make sure the target SCI settings match the host communication model settings.

So, unless the applications specifically needs ADC/ePWM-synchronous execution, keep the Base rate trigger set to Timer 0.

Thanks,

Nivedita.