Controller area network (CAN) routines

UM0459

14/29

2.2.7

CAN_SetTiming function

Example:

This example illustrates how to enable the configuration change bit, to be able to set the

specific timing parameters: TSEG1=11, TSEG2=4, SJW=4, BRP=5

{

CAN_EnterInitMode(CAN1, CAN_CR_CCE);

CAN_SetTiming(CAN1, 11, 4, 4, 5);

CAN_LeaveInitMode( CAN1 );

}

Table 11.

CAN_SetTiming function description

Function name

CAN_SetTiming

Prototype

void CAN_SetTiming(CAN_TypeDef* CAN, u16 tseg1, u16 tseg2,

u16 sjw, u16 brp);

Behavior description

Sets up the CAN timing with specific parameters. It writes the timing

value in the Bit Timing Register, from tseg1, tsg2, sjw and bits 5..0 of

brp parameter and writes the BRPR register with bits 9..0 of brp

parameter. All written values are the real values decremented by one

unit.

Input parameter 1

CAN: pointer to the CAN1 or CAN2 CAN structure.

Input parameter 2

tseg1: Time segment before the sample point position.

It can take values from 1 to 16.

Input parameter 3

tseg2: Time segment after the sample point position.

It can take values from 1 to 8.

Input parameter 4

sjw: Synchronization jump width.

It can take values from 1 to 4.

Input parameter 5

brp: Baud rate prescaler.

It can take values from 1 to 1024.

Output parameter

None

Return value

None

Required preconditions

CAN_EnterInitMode() must have been called before.

Called functions

None