AM2634-Q1: AM2634-Q1 CLASSIC CAN ID mask filtering using Extended ID and or Standard ID

Royston D'souza

Part Number: AM2634-Q1

We are looking to implement CLASSIC CAN ID mask filtering using Extended ID and or Standard ID. We are able to use the example to send data in both Extended and Standard IDs.

We have not tried receiving yet.

Our setup is the following;

MCAN0 mailbox/buffer 0 is used for transmitting all messages from the device. What this means is that we will be reconfiguring this buffer constantly before sending data.
All other mailboxes/buffers will be used for receiving individual CAN ID. Hence, the classic filtering method.

Please send us an example:

where we send data from mailbox 0 alternating between two CAN IDs: 0x00FF11AB and 0x00FF12AB
where we receive data via MCAN RX interrupts with separate mailboxes/buffer with CAN IDs: 0x00DAAB1E (mailbox 1), 0x00FF081E (mailbox 2), 0x00FF011E (mailbox 3).

An example with this content will be a great starting point for us build our MCAN library

Thank you

Royston

over 1 year ago

0 Frank Livingston over 1 year ago

TI__Mastermind 28788 points

Hi Royston,

We're looking into this and will get back with you shortly. Thanks for your patience.

Regards,
Frank

0 Sunil Kumar M S over 1 year ago

TI__Genius 11450 points

Hi Royston,

Do you want to receive messages only in the buffer? What I meant is if you chose to receive messages in the buffer, it will be always exact message id acceptance and classic mask filtering cannot be used.

Please refer section "Standard Message ID Filter Element" in MCAN chapter of AM263 technical reference manual for more details.

Regards,

Sunil Kumar M S

0 Royston D'souza over 1 year ago in reply to Sunil Kumar M S

Intellectual 816 points

Hi Sunil,

Thank you for your response. Yes we want to receive messages only in the buffer?

Is there an example in the SDK which we can use to reference Standard Message ID Filter Element demonstration

Thank you

Royston

0 Sunil Kumar M S over 1 year ago in reply to Royston D'souza

TI__Genius 11450 points

Hi Royston,

Yes we do have an example. This example demonstrates the CAN message transmission and reception in
digital loop back mode with the following configuration.

CAN FD Message Format.
Message ID Type is Standard, Msg Id 0xC0.
MCAN is configured in Interrupt Mode.
MCAN Interrupt Line Number 0.
Arbitration Bit Rate 1Mbps.
Data Bit Rate 5Mbps.
Buffer mode is used for Tx and RX.

Please note we have a separate buffers for TX and RX.

You just need to configure App_mcanConfigTxMsg and App_mcanInitStdFilterElemParams based on message IDs you want to transmit and receive.Also you need to disable loop back mode if you want to send/receive from external tool.

Please find the path below.

$MCU_PLUS_SDK_INSTALL_DIR\examples\drivers\mcan\mcan_loopback_interrupt\mcan_loopback_interrupt.c

Regards,

Sunil Kumar M S