Controller area network (CAN) routines

UM0459

12/29

2.2.4

CAN_EnterTestMode function

TestMask

Specifies the CAN configuration in test modes. The different values are given in the

following table:

Example:

This example illustrates how to switch the CAN1 into loopback mode, that is, RX is

disconnected from the bus, and TX is internally linked to RX.

{

CAN_EnterTestMode(CAN1, CAN_TESTR_LBACK);

}

Table 7.

CAN_EnterTestMode function description

Function

CAN_EnterTestMode

Prototype

void CAN_EnterTestMode(CAN_TypeDef* CAN, u16 TestMask);

Behavior description

Switches the CAN into test mode. It sets the TEST bit in the control

register and updates the Test register by storing its value with the mask.

This function must be used in conjunction with CAN_LeaveTestMode().

Input parameter1

CAN: pointer to the CAN1 or CAN2 CAN cell.

Input parameter2

TestMask: specifies the configuration in test modes.

Refer to the TestMask on page 12 section for more details on the

authorized values for this parameter.

Output parameter

None

Return value

None

Required preconditions

None

Called functions

None

Table 8.

TestMask values

TestMask

Meaning

CAN_TESTR_LBACK

Loopback mode enabled

CAN_TESTR_SILENT

Silent mode enabled

CAN_TESTR_BASIC

Basic mode enabled