atmega328p/include/periph_cpu.h

CPU specific definitions for internal peripheral handling.

GPIO_PIN( x, y)

Define a CPU specific GPIO pin generator macro. 

1
((x << 4) | y)
CPU_ATMEGA_EXT_INTS

Available external interrupt pins on the ATmega328p family. 

1
2
{ GPIO_PIN(PORT_D, 2), \
                                 GPIO_PIN(PORT_D, 3) }

In order of their interrupt number.

enum @7
PORT_B = 1
port B
PORT_C = 2
port C
PORT_D = 3
port D
I2C_PORT_REG
1
PORTC
I2C_PIN_MASK
1
(1 << PORTC4) | (1 << PORTC5)
EEPROM_SIZE
1
(1024U)  /* 1kB */