Hi experts,
We are developing a custom board based on TDA4APE. And I'm trying to genenrate a square wave with PWM. We are using pin F33, i.e. EHRPWM4_B to generate the wave.
The corresponding dts configs are shown below.
After that, I can see the node /sys/class/pwm/pwnchip0 in sysfs. Then I followed steps shown below to create a PWM wave with period of 100 milliseconds with 30% duty cycle. All commands run normally without error.
However, when I measured the output of the pin with an oscilloscope, it remained constantly high without any waveform, as shown in the figure below.
Could you please help identify the possible reasons for this?
