TMS320F28069M: PWM Initialization upon an event using Simulink

Rolando Aguilera

Part Number: TMS320F28069M

Hello everyone,

I am currently working on generating code using embedded coder. Im using the following configuration:

1. Enabling ADC SOC using ePWM block

2. Within ADC Interrupt read all my adcs and trigger the CLA

3. Run the control algorithm on the CLA

4. Use CLA interrupt (triggered after CLA finishes) for RMS post processing.

Now in order to start all the process, I need to wait for an external signal and read it with a digital input.

Question is I want the ePWMs to start ONLY after reading a 1 on the external signal. Basically I dont the ePWMS to start once the chip powers up.

How can I achieve the above in simulink?

Thanks,

Rolando

0 venkatesh chilapur over 5 years ago

Hi,

One way to achieve it is externally by using the Trip Zone feature.

I have highlighted the path which can used in the current scenario.

The external signal should be in a state which will keep the PWM outputs low/high as long as Trip condition is true.

Once the external signal changes state (that should result in no Trip condition) then normal PWM activity will follow.

This can further explored and seen how to adopt in your design.

HTH,

0 Rolando Aguilera over 5 years ago in reply to venkatesh chilapur

Thanks its a good idea. But is there any way to do the above using a single bit from a register?

0 venkatesh chilapur over 5 years ago in reply to Rolando Aguilera

Hi,

TZFRC and TZCLR can help in this direction.

0 Santosh Jha over 5 years ago in reply to venkatesh chilapur

Closing the thread now as there has not been any activity on this.

C2000 microcontrollers forum