Mikroelektronika MIKROE-350 Fiche De Données

175

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub procedure CANSPIInitialize(dim SJW as byte, dim BRP as byte,
dim PHSEG1 

as byte, dim PHSEG2 as byte, dim PROPSEG as byte, dim

CAN_CONFIG_FLAGS 

as byte)

Nothing.

Initializes the CANSPI module.

Stand-Alone CAN controller in the CANSPI module is set to: 

- Disable CAN capture 
- Continue CAN operation in Idle mode 
- Do not abort pending transmissions 
- Fcan clock: 4*Tcy (Fosc) 
- Baud rate is set according to given parameters 
- CAN mode: Normal 
- Filter and mask registers IDs are set to zero 
- Filter and mask message frame type is set according to 

CAN_CONFIG_FLAGS

value 

SAM,SEG2PHTS,WAKFIL

and 

DBEN

bits are set according to 

CAN_CONFIG_FLAGS

value.

Parameters:

- 

SJW

as defined in CAN controller's datasheet 

- 

BRP

as defined in CAN controller's datasheet 

- 

PHSEG1

as defined in CAN controller's datasheet 

- 

PHSEG2

as defined in CAN controller's datasheet 

- 

PROPSEG

as defined in CAN controller's datasheet 

- 

CAN_CONFIG_FLAGS

is formed from predefined constants (see CANSPI constants)

Global variables : 

- 

CanSpi_CS

: Chip Select line 

- 

CanSpi_Rst

: Reset line 

- 

CanSpi_CS_Bit_Direction

: Direction of the Chip Select pin 

- 

CanSpi_Rst_Bit_Direction

: Direction of the Reset pin 

must be defined before using this function.

The CANSPI routines are supported only by MCUs with the SPI module.

The SPI module needs to be initialized. See the SPI1_Init and
SPI1_Init_Advanced routines. 

MCU has to be properly connected to mikroElektronika's CANSPI Extra Board
or similar hardware. See connection example at the bottom of this page.