UM0459

Controller area network (CAN) routines

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2.2.1

CAN_Init function

CAN_ReceiveMessage (Section 2.2.16)

Gets the message, if received.

CAN_BasicSendMessage (Section 2.2.17)

Starts transmission of a message in BASIC mode.

CAN_BasicReceiveMessage (Section 2.2.18) Gets the message in BASIC mode, if received.

CAN_WaitEndOfTx (Section 2.2.19)

Waits until the end of transmission of a frame.

CAN_GetMsgReceiveStatus (Section 2.2.20)

Tests the waiting status of a received message.

CAN_GetMsgTransmitRequestStatus

(Section 2.2.21)

Tests the request status of a transmitted message.

CAN_GetMsgInterruptStatus (Section 2.2.22) Tests the interrupt status of a message object.

CAN_GetMsgValidStatus (Section 2.2.23)

Tests the validity of a message object (ready to use).

CAN_GetFlagStatus (Section 2.2.24)

Returns the status of the TxOK, RxOK, EPASS,

EWARN and BOFF flags.

CAN_GetTransmitErrorCounter

(Section 2.2.25)

Gets the CAN transmit Error counter.

CAN_GetReceiveErrorCounter

(Section 2.2.26)

Gets the CAN receive Error counter.

Table 2.

CAN functions (continued)

Function name (corresponding sections)

Description

Table 3.

CAN_Init function description

Function name

CAN_Init

Function prototype

void CAN_Init(CAN_TypeDef* CAN, u16 Mask, u16 Bitrate)

Behavior description

Initializes the CAN peripheral passed as a parameter.

Input parameter 1

CAN: pointer to the CAN1 or CAN2 CAN cell.

Input parameter 2

Mask: any binary value resulting from the following (Refer to the CAN

control register definition):

– CAN_CR_EIE: CAN Error Interrupt Enable

– CAn_CR_SIE: CAN Status Interrupt Enable

– CAN_CR_IE: CAN Interrupt Enable

– CAN_CR_ DAR: CAN Disable Automatic retransmission

– CAN_CR_CCE: CAN Configuration Enable

– CAN_CR_TEST: Enable CAN test mode

Input parameter 3

It can be one of the CAN_BITRATE_xxx parameters given in Table 4:

CAN_Bitrate values on page 10

Output parameter

None

Return parameter

None