Enum pl_io_num

Enum pl_io_num contains the list of constants that refer to available GPIO lines. Use these constants when selecting the line with the io. object (see the io.num property).

Note that GPIO lines are of unidirectional type and require explicit configuration as outputs or inputs. Some lines are configured as inputs or outputs automatically — see the notes at the bottom of the page.

Enum pl_io_num includes the following constants:

Notes:

1. When a serial port is in the UART mode (ser.mode= 0- PL_SER_MODE_UART) this line is automatically configured to be an input when this serial port is enabled (ser.enabled= 1- YES) and returns to the previous input/output and high/low state when this serial port is closed (ser.enabled= 0- NO). When a serial port is in the Wiegand or clock/data mode (ser.mode= 1- PL_SER_MODE_WIEGAND or ser.mode= 2- PL_SER_MODE_CLOCKDATA), the line has to be configured as input by the application- this will not happen automatically.
2. When a serial port is in the UART mode (ser.mode= 0- PL_SER_MODE_UART) this line is automatically configured to be an output when the serial port is enabled (ser.enabled= 1- YES) and returns to the previous input/output and high/low state when the serial port is closed (ser.enabled= 0- NO). When a serial port is in the Wiegand or clock/data mode (ser.mode= 1- PL_SER_MODE_WIEGAND or ser.mode= 2- PL_SER_MODE_CLOCKDATA), the line has to be configured as output by the application- this will not happen automatically.
3. When the beeper pattern stars playing, this line is configured as output automatically. When the beeper pattern stops playing, the output returns to the input/output and high/low state that it had before the pattern started playing.