FLEXCAN module not working in LS1021A

[sukruthrameshba]

Hello,

I am trying to develop CAN driver for LS1021A. (I cant use the SDK from NXP I am using a custom made board)

Used this "Example MPC5744P FlexCAN simpleTXRX " uploaded by Petr Stancik as reference for developing CAN driver using FLEXCAN module.

Did these modifications

1. Endianess is taken care.

2. RCW configuration enabling CAN4_TX , CAN4_RX is loaded.

MCR , CTRL , message buffers are configured properly which could be seen in the debugger. Attached is the snapshot for reference.

RXERRCNT is 80 , read from ECR register, when I try to transmit a CAN message from the CANoe. As shown below

I don't see any CAN message on the bus.

When I try to transmit a CAN message from the transceiver (TJA1042T-/3), I see this message in the CANoe

Can you please help me out with the checkpoints ? Let me know if you need more information.

It would of great help if you can tell me , what could be the possible mistake.

Regards,

Sukruth

[Pavel]

Test your board if the MCR[SRXDIS] bit is cleared and Loopback mode is enabled.

Have a great day,
Pavel Chubakov

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[sukruthrameshba]

Dear Pavel,

Yes, MCR[SRXDIS] bit is cleared and LPB bit is enabled.

Here is the register settings loaded to MCR nad CTRL registers in FLEXCAN module.

CAN3.MCR.R = swapEndian(0x5921303F);

CAN3.CTRL.R = swapEndian(0xEED3016);

Regards,

Sukruth