About CAN RX ID filltering with RT1170 EVK

dskim2 — Thu, 28 Dec 2023 02:06:36 GMT

I want to set all can rx ids pass so setted as below.

I modified the sample source flexcan_interrupt_transfer.c

// Set Rx Masking mechanism.

FLEXCAN_SetRxMbGlobalMask(EXAMPLE_CAN, FLEXCAN_RX_MB_STD_MASK(0x000, 0, 0));

// Setup Rx Message Buffer.

mbConfig.format = kFLEXCAN_FrameFormatStandard;

mbConfig.type = kFLEXCAN_FrameTypeData;

mbConfig.id = FLEXCAN_ID_STD(0x000);

#if (defined(USE_CANFD) && USE_CANFD)

FLEXCAN_SetFDRxMbConfig(EXAMPLE_CAN, RX_MESSAGE_BUFFER_NUM, &mbConfig, true);

#else

FLEXCAN_SetRxMbConfig(EXAMPLE_CAN, RX_MESSAGE_BUFFER_NUM, &mbConfig, true);

#endif

When I ran the sample project, CAN TX ID was received.

********* FLEXCAN Interrupt EXAMPLE *********
Message format: Standard (11 bit id)
Message buffer 9 used for Rx.
Message buffer 8 used for Tx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
*********************************************

Please select local node as A or B:
Note: Node B should start first.
Node:a
Press any key to trigger one-shot transmission

Rx MB ID: 0x321, Rx MB data: 0x0, Time stamp: 30306 <= Tx CAN message
Press any key to trigger the next transmission!

Are there any incorrect settings?

Best Regards

Re: About CAN RX ID filltering with RT1170 EVK

kerryzhou — Tue, 02 Jan 2024 03:26:17 GMT

Hi @dskim2 ,

Happy New Year! Thanks for your interest in the NXP MIMXRT product, I would like to provide service for you.

About the filter, you can refer to this post:

https://community.nxp.com/t5/i-MX-RT/RT1052-FLEXCAN-for-some-for-example-five-IDs-communication/m-p/1433388#M18900

Yes, if you want to receive all the ID, you can set the API like this:

FLEXCAN_SetRxMbGlobalMask(EXAMPLE_CAN, 0);

void FLEXCAN_SetRxMbGlobalMask(CAN_Type *base, uint32_t mask) { /* Enter Freeze Mode. */ FLEXCAN_EnterFreezeMode(base); /* Setting Rx Message Buffer Global Mask value. */ base->RXMGMASK = mask; base->RX14MASK = mask; base->RX15MASK = mask; /* Exit Freeze Mode. */ FLEXCAN_ExitFreezeMode(base); }

Then, your filter will "don't care." all the ID bit, you can receive all the IDs.

Wish it helps you!

Best Regards,

kerry

topic Re: About CAN RX ID filltering with RT1170 EVK in i.MX Processors

About CAN RX ID filltering with RT1170 EVK

Re: About CAN RX ID filltering with RT1170 EVK