Input Port Access

This group contains defines and macros to initialize port pins as inputs and read them. More...

Macros
#define	IO_PORT_IN_INIT(port, pins)
	Initializes a set of port pins as inputs. More...
#define	IO_PORT_ON_GND   0
	Bit mask to set the logical 1 to GND level for all selected pins. More...
#define	IO_PORT_ON_HIGH   0xff
	Bit mask to set the logical 1 to high level for all selected pins. More...
#define	IO_PORT_GET(port, pins, on)
	Evaluates to a bit mask of logical pin states of a port. More...

Detailed Description

This group contains defines and macros to initialize port pins as inputs and read them.

Macro Definition Documentation

IO_PORT_GET

#define IO_PORT_GET	(		port,
			pins,
			on
	)

Value:

( \
        (port##_DATA ^ ~(on)) & (pins) \
)

Evaluates to a bit mask of logical pin states of a port.

Note

Can also be used for Output Port Access

Warning

Expects port page 0 and RMAP 0, take care in ISRs

Parameters

port	The parallel port to access
pins	A bit mask of the pins to select
on	A bit mask of pins that defines the states which represent on

IO_PORT_IN_INIT

#define IO_PORT_IN_INIT	(		port,
			pins
	)

Value:

{ \
        port##_DIR &= ~(pins); \
}

Initializes a set of port pins as inputs.

Warning

Expects port page 0 and RMAP 0, take care in ISRs

Parameters

port	The parallel port to configure
pins	A bit mask of the pins to select

IO_PORT_ON_GND

#define IO_PORT_ON_GND   0

Bit mask to set the logical 1 to GND level for all selected pins.

Note

Can also be used for Output Port Access

IO_PORT_ON_HIGH

#define IO_PORT_ON_HIGH   0xff

Bit mask to set the logical 1 to high level for all selected pins.

Note

Can also be used for Output Port Access