{IDF_TARGET_NAME} has a second-order sigma-delta modulation module. This driver configures the channels of the sigma-delta module.
There are eight independent sigma-delta modulation channels identified with :cpp:type:`sigmadelta_channel_t`. Each channel is capable to output the binary, hardware generated signal with the sigma-delta modulation.
Selected channel should be set up by providing configuration parameters in :cpp:type:`sigmadelta_config_t` and then applying this configuration with :cpp:func:`sigmadelta_config`.
Another option is to call individual functions, that will configure all required parameters one by one:
- Prescaler of the sigma-delta generator - :cpp:func:`sigmadelta_set_prescale`
- Duty of the output signal - :cpp:func:`sigmadelta_set_duty`
- GPIO pin to output modulated signal - :cpp:func:`sigmadelta_set_pin`
The range of the 'duty' input parameter of :cpp:func:`sigmadelta_set_duty` is from -128 to 127 (eight bit signed integer). If zero value is set, then the output signal's duty will be about 50%, see description of :cpp:func:`sigmadelta_set_duty`.
Sigma-delta Modulation example: :example:`peripherals/sigmadelta`.
.. include-build-file:: inc/sigmadelta.inc
.. include-build-file:: inc/sigmadelta_types.inc