OR1K macros

Macros
#define	REG8(add)   *((volatile unsigned char *) (add))
#define	REG16(add)   *((volatile unsigned short *) (add))
#define	REG32(add)   *((volatile unsigned long *) (add))

Detailed Description

Macro Definition Documentation

#define REG16

(

add

)

*((volatile unsigned short *) (add))

Access halfword-sized memory mapped register

Used to access a 16 byte-sized memory mapped register. It avoids usage errors when not defining register addresses volatile and handles casting correctly.

See REG8() for an example.

Parameters

add	Register address

#define REG32

(

add

)

*((volatile unsigned long *) (add))

Access word-sized memory mapped register

Used to access a word-sized memory mapped register. It avoids usage errors when not defining register addresses volatile and handles casting correctly.

See REG8() for an example.

Parameters

add	Register address

#define REG8

(

add

)

*((volatile unsigned char *) (add))

Access byte-sized memory mapped register

Used to access a byte-sized memory mapped register. It avoids usage errors when not defining register addresses volatile and handles casting correctly.

Example for both read and write:

uint8_t status = REG8(IPBLOCK_STATUS_REG_ADDR);
REG8(IPBLOCK_ENABLE) = 1;

Parameters

add	Register address