AN1278 datasheet(14/44 Pages) STMICROELECTRONICS

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LIN (LOCAL INTERCONNECT NETWORK) SOLUTIONS

3.2.1 Type definition

t_error

typedef enum {NO_ERROR,BIT_ERROR,ID_PARITY_ERROR,CHECKSUM_ERROR,

NO_ID_MATCH,TIMEOUT_ERROR,DATA_RECEIVED,DATA_REQUEST,

WAKE_UP,UART_ERROR,SYNCH_BREAK_ERROR}t_error;

defines the different error code values that the software functions are able to return.

t_message_direction

typedef enum {ID_DATAREQUEST,ID_DATASENT}t_message_direction;

This type is used internally in lin.c and in lin_drv.c.

t_id_list

typedef struct{

uByte id;

t_message_direction dir;

uByte length;} t_id_list;

defines the type of an identifier list.

t_one_databyte_output

typedef struct{

t_error error_code;

uByte data_byte;} t_one_databyte_output;

defines a type of function return value consisting of an error code made up of error type and a

data byte.

t_header

typedef struct

{

uByte identifier;

uByte length;} t_header;

A LIN frame consists of a header and a response. This typedef defines the header part type.

t_response

typedef struct

{

uByte data[8];

uByte checksum;} t_response;

A LIN frame consists of a header and a response. This typedef defines the response part type.

3.2.2 User interface functions

To integrate this software into your application software you have to link 3 or 4 functions de-

fined in lin.c to your project.

AN1278 Datasheet(PDF) 14 Page - STMicroelectronics