Class _gpa: 8-bit I/O port

This class is used in all Atmel AVR devices.

Relatives

• (portx,p): the single gpio pin at position p of portx.
• (portx,n,p): the n consecutive gpio pins at position p of portx.
• (portx,ddr): the DDR register of portx.
• (portx,pin): the PIN register of portx.
• (portx,port): the PORT register of portx.

Interface

---

hw( configure, ... ) and hwa( configure, ... ): configure all the pins of the gpio port PORT.

Note

These actions are not implemented yet. Configure the GPIO pins instead.

hw( configure, portb, mode, output_pushpull );

hw( configure, portb, mode, input_pullup );

---

hw( read, PORT ) returns the status of all the pins of the gpio port PORT.

hw( read, portb );

---

hw( write, PORT, ... ) and hwa( write, PORT, ... ): configure all the pins of the gpio port PORT.

hw( write, portb, 0xBE );

hwa( write, portb, 0xEF );