How using HRTIM as push-pull for the STM32G474

[OGhis]

Hi,

Is there anywhere an example how we can use the HRTIM in push-pull mode and how to start the timer?

I had use the following instruction, but the outputs are always low.

HAL_HRTIM_WaveformOutputStart(&hhrtim1, HRTIM_OUTPUT_TE1 | HRTIM_OUTPUT_TE2);
 
HAL_HRTIM_WaveformCounterStart(&hhrtim1, HRTIM_TIMERID_TIMER_E);

regards

[Amel NASRI]

Hello @OGhis​ ,

Did you looked to the examples available under STM32Cube_FW_G4_V1.1.0\Projects\NUCLEO-G474RE\Examples\HRTIM?

-Amel

[waclawek.jan]

If you talking about the output pin, push-pull or open-dran is selected in the GPIO, not in the peripherals (such as HRTIM).

You also may want to have a look at AN4539 "HRTIM cookbook".

JW

[OGhis]

I means that i will use the HRTIM for a Push pull power supply topology. (not the GPIO in push-pull mode).

see also RM0440 page 828

like in this schematic:

In the CubeMx is there a option for: "Push Pull".

This are the output signals i need:

[OGhis]

I used the following code to start the Timer:

  /* Start HRTIM's TIMER E */
HAL_HRTIM_WaveformOutputStart(&hhrtim1, HRTIM_OUTPUT_TE1);
HAL_HRTIM_WaveformOutputStart(&hhrtim1, HRTIM_OUTPUT_TE2);
HAL_HRTIM_WaveformCounterStart(&hhrtim1, HRTIM_TIMERID_TIMER_E) ;
 
 
  HAL_HRTIM_WaveformSetOutputLevel(&hhrtim1,
                                   HRTIM_TIMERINDEX_TIMER_E,
                                   HRTIM_OUTPUT_TE1,
                                   HRTIM_OUTPUTLEVEL_ACTIVE);
  HAL_HRTIM_WaveformSetOutputLevel(&hhrtim1,
                                   HRTIM_TIMERINDEX_TIMER_E,
                                   HRTIM_OUTPUT_TE2,
                                   HRTIM_OUTPUTLEVEL_ACTIVE);

I can see the signal on channel TE1, but the signal on channel TE2 has always a duty cycle of 50%

The set and reset source are configured as follow:

  pOutputCfg.SetSource     = HRTIM_OUTPUTRESET_TIMCMP1;
  pOutputCfg.ResetSource = HRTIM_OUTPUTRESET_TIMPER;

And i use only the compare 1 register and the DEADTIME is active between the 2 outputs