External Bus Interface API. More...

Detailed Description

External Bus Interface API.

Author: Gerson Fernando Budke nando.nosp@m.jve@.nosp@m.gmail.nosp@m..com

Definition in file cpu_ebi.h.

#include "periph_cpu.h"

Include dependency graph for cpu_ebi.h:

#define	CPU_EBI_H

#define	HUGEMEM_NULL 0

typedef uint32_t	hugemem_ptr_t

void	ebi_init (void)

static uint8_t	hugemem_read8 (const hugemem_ptr_t from)
	Load byte register from external memory pointer.

static void	hugemem_write8 (hugemem_ptr_t to, uint8_t val)
	Store byte register to external memory pointer.

uint16_t	hugemem_read16 (const hugemem_ptr_t from)
	Load register pair from external memory pointer.

void	hugemem_write16 (hugemem_ptr_t to, uint16_t val)
	Store register pair to external memory pointer.

uint32_t	hugemem_read32 (const hugemem_ptr_t from)
	Load two register pair from external memory pointer.

void	hugemem_write32 (hugemem_ptr_t to, uint32_t val)
	Store two register pair to external memory pointer.

void	hugemem_read_block (void *to, const hugemem_ptr_t from, size_t size)
	Read byte stream from external memory to internal memory.

void	hugemem_write_block (hugemem_ptr_t to, const void *from, size_t size)
	Write byte stream from internal memory to external memory.

Macro Definition Documentation

◆ CPU_EBI_H

#define CPU_EBI_H

Definition at line 22 of file cpu_ebi.h.

◆ HUGEMEM_NULL

#define HUGEMEM_NULL 0

Definition at line 30 of file cpu_ebi.h.

Typedef Documentation

◆ hugemem_ptr_t

typedef uint32_t hugemem_ptr_t

Definition at line 28 of file cpu_ebi.h.

Function Documentation

◆ hugemem_read16()

uint16_t hugemem_read16 ( const hugemem_ptr_t from )

Load register pair from external memory pointer.

Parameters

from	24-bit external memory address

Returns: uint16_t 8-bit value

◆ hugemem_read32()

uint32_t hugemem_read32 ( const hugemem_ptr_t from )

Load two register pair from external memory pointer.

Parameters

from	24-bit external memory address

Returns: uint8_t 32-bit value

◆ hugemem_read8()

static uint8_t hugemem_read8 ( const hugemem_ptr_t from )

inlinestatic

Load byte register from external memory pointer.

Parameters

from	24-bit external memory address

Returns: uint8_t 8-bit value

Definition at line 40 of file cpu_ebi.h.

◆ hugemem_read_block()

void hugemem_read_block	(	void *	to,
		const hugemem_ptr_t	from,
		size_t	size
	)

Read byte stream from external memory to internal memory.

Parameters

to	internal memory pointer
from	24-bit external memory pointer
size	number of bytes to read

Note: The address range to copy from is within 64 kB boundary

◆ hugemem_write16()

void hugemem_write16	(	hugemem_ptr_t	to,
		uint16_t	val
	)

Store register pair to external memory pointer.

Parameters

to	24-bit external memory address
val	16-bit value

◆ hugemem_write32()

void hugemem_write32	(	hugemem_ptr_t	to,
		uint32_t	val
	)

Store two register pair to external memory pointer.

Parameters

to	24-bit external memory address
val	32-bit value

◆ hugemem_write8()

static void hugemem_write8	(	hugemem_ptr_t	to,
		uint8_t	val
	)

inlinestatic

Store byte register to external memory pointer.

Parameters

to	24-bit external memory address
val	8-bit value

Definition at line 72 of file cpu_ebi.h.

◆ hugemem_write_block()

void hugemem_write_block	(	hugemem_ptr_t	to,
		const void *	from,
		size_t	size
	)

Write byte stream from internal memory to external memory.

Parameters

to	24-bit external memory pointer
from	internal memory pointer
size	number of bytes to write

Note: The address range to copy to is within 64 kB boundary