Controller area network (CAN) routines

UM0459

8/29

The CAN1 and CAN2 are defined in the st10f27x_can.h file as follows:

/* C-CAN modules defintion */

#define CAN1_BASE

0xEF00

#define CAN2_BASE

0xEE00

#define CAN1

( (CAN_TypeDef *) CAN1_BASE)

#define CAN2

( (CAN_TypeDef *) CAN2_BASE)

Note:

To use CAN1 and/or CAN2 interfaces, the CAN1EN and/or CAN2EN bits must be set in the

XPERCON register before configuring the SYSCON register.

2.2

Software library functions

The functions of the CAN library are listed in the following table and are described in the

corresponding subsections:

IP1R

CAN Interrupt Pending 1 Register

IP2R

CAN Interrupt Pending 2 Register

MV1R

CAN Message Valid 1 Register

MV2R

CAN Message Valid 2 Register

Table 1.

CAN registers (continued)

Register

Description

Table 2.

CAN functions

Function name (corresponding sections)

Description

CAN_Init (Section 2.2.1)

Initializes the CAN cell and sets the bitrate.

CAN_EnterInitMode(Section 2.2.2)

Switches the CAN to initialization mode.

CAN_LeaveInitMode (Section 2.2.3)

Leaves initialization mode (switches to normal

mode).

CAN_EnterTestMode (Section 2.2.4)

Switches the CAN to test mode.

CAN_LeaveTestMode(Section 2.2.5)

Leaves the current test mode (switches to normal

mode).

CAN_SetBitrate (Section 2.2.6)

Configures a standard CAN bitrate.

CAN_SetTiming (Section 2.2.7)Configures the CAN timing with specific parameters.

CAN_SetUnusedMsgObj (Section 2.2.8)

Configures the message object as unused.

CAN_SetTxMsgObj (Section 2.2.10)

Configures the message object as TX.

CAN_SetRxMsgObj (Section 2.2.11)

Configures the message object as RX.

CAN_SetUnusedAllMsgObj (Section 2.2.9)

Configures all message objects as unused.

CAN_ReleaseMessage (Section 2.2.12)

Releases the message object.

CAN_UpdateMsgObj (Section 2.2.14)

Updates the message object.

CAN_TransmitRequest (Section 2.2.15)

Requests the transmission of a message object.

CAN_SendMessage (Section 2.2.13)

Updates and starts transmission of a message.