pwm_audio: is it possible to use for mono configurations? how? (AEGHB-936)

[doragasu]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

It is not clear in the documentation if this component supports mono configurations (with a single speaker). I only want to play mono wav files, and it is not clear if this is supported and if affirmative how should one configure this mode. Should I set bot L and R channels to the same GPIO? Should I set one to an invalid value (like -1)?

In the documentation and sources, there is enum pwm_audio_channel_t that has as a possible value PWM_AUDIO_CH_MONO, but I cannot see this enum used anywhere in the sources.

[YanKE01]

Hi, @doragasu . Thank you very much for your interest in pwm_audio. If you are not using the left channel, you can set ledc_channel_left in pwm_audio_config_t to -1, and the same applies for the right channel.

[doragasu]

Thanks for the clarification. Closing.