UM0459 datasheet(13/29 Pages) STMICROELECTRONICS

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UM0459

Controller area network (CAN) routines

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2.2.5

CAN_LeaveTestMode function

Example:

{

CAN_LeaveTestMode(CAN2);

}

2.2.6

CAN_SetBitrate function

Bitrate

The CAN bitrate values are given in Table 4: CAN_Bitrate values on page 10.

Table 9.

CAN_LeaveTestMode function description

Function name

CAN_LeaveTestMode

Prototype

void CAN_LeaveTestMode(CAN_TypeDef* CAN)

Behavior description

Leaves the current test mode (switches into normal mode).

This function sets the TEST bit in the Control register to enable

write access to the Test register, clears the LBACK, SILENT

and BASIC bits in the Test register and clears the TEST bit in

the Control register to disable write access to the Test register.

This function must be used in conjunction with

CAN_EnterTestMode().

Input parameter

CAN: pointer to the CAN1 or CAN2 CAN cell.

Output parameter

None

Return value

None

Required preconditions

None

Called functions

None

Table 10.

CAN_SetBitrate function description

Function name

CAN_SetBitrate

Prototype

void CAN_SetBitrate(CAN_TypeDef* CAN, u16 bitrate);

Behavior description

Sets up a standard CAN bitrate. This function writes the predefined

timing value in the Bit Timing register and clears the BRPR register.

Input parameter1

CAN: pointer to the CAN1 or CAN2 CAN cell.

Input parameter2

BitRate: specifies the bitrate.

Refer to the Bitrate on page 13 section for more details on the

authorized values of this parameter.

Output parameter

None

Return value

None

Required preconditions

CAN_EnterInitMode() must have been called before.

The ST10 frequency = 40 MHz and the prescaler 1/2 is activated at the

CAN clock generator input. See also Section 2.2.7: CAN_SetTiming

function on page 14

Called Functions

None

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