Parallel IO RX unit handle that created by `parlio_new_rx_unit`
delimiter
Delimiter handle
start_stop
Set true to start, set false to stop
Return value
- ESP_ERR_INVALID_ARG Invalid arguments in the parameter list or not soft delimiter - ESP_ERR_INVALID_STATE The rx unit not enabled - ESP_OK Success to start or stop the soft delimiter
Notes
Soft delimiter need to start or stop manually because it has no validating/enabling signal to indicate the data has started or stopped