AM2634: What are the proper start addresses of the MCAN RXFIFO0 and RXFIFO1

jimj2713

Part Number: AM2634

Tool/software:

I have an application that may receive 2 different CAN-addressed packets, so I am using the RX FIFO0 and FIFO1 as part of the reception process, and I cannot get anything thing in on FIFO1. I have compared my settings to my working 28388 MCAN registers, and I suspect this is problem:

msgRAMConfigParams.rxFIFO0StartAddr = 0;

msgRAMConfigParams.rxFIFO1StartAddr = 0;

In the 28388, these were both non-zero, but I cannot find in the documentation a memory map of the MCAN message RAM. What should these start-addresses be set to?

Thanks,

Jim

7 months ago

0 Fleenor 7 months ago

TI__Mastermind 22953 points

Hello Jim,

The MCAN Message RAM physical addresses are provided in the AM263x Register Addendum.

MCAN0_MSG_RAM = 0x5260000

MCAN1_MSG_RAM = 0x5261000

MCAN2_MSG_RAM = 0x5262000

MCAN3_MSG_RAM = 0x5263000

The following two API should take care of this.

MCAN_initMsgRamConfigParams()

MCAN_calcMsgRamParamsStartAddr()

Best Regards,

Zackary Fleenor

0 jimj2713 7 months ago in reply to Fleenor

Expert 2375 points

Zackary,

I saw that definition of the first address of message RAM, but then somewhere within that block of memory, the first FIFO starts, and then somewhere else, the second FIFO starts. It is these values that I need:

msgRAMConfigParams.rxFIFO0StartAddr = ?

msgRAMConfigParams.rxFIFO1StartAddr = ?

Thanks,

Jim

0 jimj2713 7 months ago in reply to jimj2713

Expert 2375 points

Zackary,

I will close this issue; I changed my filtering method from classic to range, and it worked. Not sure why the previous method worked for only filter0, but it does not matter.

Thanks,

Jim

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AM2634: What are the proper start addresses of the MCAN RXFIFO0 and RXFIFO1