sle.c File Reference

API interface. More...

#include <stdint.h>
#include <stdlib.h>
#include <avr/io.h>
#include "sle.h"

Include dependency graph for sle.c:

Functions
void	sle_enable_port (void)
void	sle_disable_port (void)
struct sle_t *	sle_init (void)
void	sle_free (struct sle_t *sle)
void	sle_reset (uint8_t *atr)
	reset the card. More...
uint8_t	sle_present (struct sle_t *sle)
void	sle_dump_memory (uint8_t *mm)
void	sle_dump_prt_memory (uint8_t *mm)
void	sle_dump_secmem (uint8_t *mm)
void	sle_dump_allmem (struct sle_t *sle)
void	sle_auth (struct sle_t *sle, const uint8_t pin1, const uint8_t pin2, const uint8_t pin3)
void	sle_write_memory (struct sle_t *sle, const uint8_t base, const uint8_t len)
void	sle_write_secmem (struct sle_t *sle)

Detailed Description

API interface.

Low level bit banging driver to read and write to Sle4442 card.

Function Documentation

sle_auth()

void sle_auth	(	struct sle_t *	sle,
		const uint8_t	pin1,
		const uint8_t	pin2,
		const uint8_t	pin3
	)

Perform the authentication.

See the datasheet on how to authenticate.

Parameters

sle	the struct allocated for the card.
pin1	byte 1 of the pin number.
pin2	byte 2 of the pin number.
pin3	byte 3 of the pin number.

sle_disable_port()

void sle_disable_port

(

void

)

Disable the port and restore all the used pins to IN.

Note

also restore internals pull-up resistors to OFF.

sle_dump_allmem()

void sle_dump_allmem

(

struct sle_t *

sle

)

Dump the all memories, normal, secure and protected memory.

Parameters

sle	struct with allocated space for the dump.

Warning

the space have to be already allocated.

sle_dump_memory()

void sle_dump_memory

(

uint8_t *

mm

)

Dump the card's memory into the mm area.

Parameters

mm	the storage area where to dump the memory card.

Warning

the dump memory should be already allocated and have enought space for the card (256 Byte).

sle_dump_prt_memory()

void sle_dump_prt_memory

(

uint8_t *

mm

)

Dump the protected memory.

Parameters

mm	allocated 4 Byte space for the dump.

Warning

the space have to be already allocated.

sle_dump_secmem()

void sle_dump_secmem

(

uint8_t *

mm

)

Dump the secure memory.

Parameters

mm	allocated 4 Byte space for the dump.

Warning

the space have to be already allocated.

sle_enable_port()

void sle_enable_port

(

void

)

Initialize the port.

Configure the I/O port's pin as: Card present pin: IN Reset: OUT Clock: OUT IO line: IN

Note

If an internal PULL-UP resistors is required for the IN pin, the define SLE_MICRO_PULLUP macro. For example if we have connected the card's pin directly to the micro without external resistors.

sle_free()

void sle_free

(

struct sle_t *

sle

)

Free the memory allocated to the structure and disable the port connected to the card's reader.

Parameters

sle	the allocated structure.

Note

In theory this function should never be called, unless the software have no need for the card reader.

sle_init()

struct sle_t* sle_init

(

void

)

Initialize and allocate the structure and enable the port connected to the card's reader.

Returns

sle The allocated structure.

sle_present()

uint8_t sle_present

(

struct sle_t *

sle

)

Check for the presence of the card.

The status of the card will be stored into the struct.

Parameters

sle	the struct need to store the card's status.

Returns

Card present or not.

sle_reset()

void sle_reset

(

uint8_t *

atr

)

reset the card.

Parameters

atr	pointer to the string sent to reset the card.

sle_write_memory()

void sle_write_memory	(	struct sle_t *	sle,
		const uint8_t	base,
		const uint8_t	len
	)

Write a group of byte into the memory card.

Write one byte at a time from the allocated memory in the sle struct starting from base for len byte.

Parameters

sle	the allocated struct.
base	the base memory to start copying from.
len	how many byte to copy.

sle_write_secmem()

void sle_write_secmem

(

struct sle_t *

sle

)

Write the secure memory.

Copy the 4 byte secure memory from the allocated struct to the card.

Parameters

sle	the allocated struct.