AN1105 datasheet(43/100 Pages) STMICROELECTRONICS

номер детали	AN1105

подробное описание детали	ST7 pCAN PERIPHERAL DRIVER

PDF	100 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

Logo

43 / 100 page

43/100

ST7 pCAN PERIPHERAL DRIVER

Figure 19. FIFO Transmission System

For more information, refer to Section 3.2.2 "Internal Routines", (CAN_In_Queue and

CAN_Out_Queue).

3.2.1.2 Software Filters

Once the

SOFTWARE_FILTERS option is defined in can_custom.h and the list of filters is

completed, the compiler will define and initialize a structure containing the data.

typedef struct{

u8 array_size;

u16* filters_array;

}CAN_Filters_Array;

This structure is composed of the size of the array, automatically calculated at compilation,

and of an array of 2-byte long numbers.

Consequently, the following constants are defined in the can.c file:

const u16 i_filters[]=INIT_FILTERS;

const CAN_Filters_Array CAN_filters={

Size_Of_Words_Array(i_filters),

i_filters

};

As we can see, they are immediately initialized. Size_Of_Words_Array is a macro and i_filters

is the array filled with your data.

You can access the i_filters array, declared as

extern const in can.h.

3.2.1.3 Enum Types

They are used as return values for some internal routines.

Object 1

Object 2

Object 3

FIFO Management

Preceding

1st object

last object

in use?

current size = xx

& message

Next data to send

AN1105 датащи(PDF) 43 Page - STMicroelectronics