Kinetis MicrocontrollersのトピックRe: FRDM-MKE06Z MSCAN Recieve All

FRDM-MKE06Z MSCAN Recieve All

stevenlutz — Thu, 02 Dec 2021 17:08:35 GMT

I have started with the mscan_loopback demo on the FRDM-MKE06Z and removined the code for transmit.
I would now like to recieve frames from any can-id.

I suspect that I need to cahnge something with the following
mscanConfig.filterConfig.u32IDAR0
mscanConfig.filterConfig.u32IDAR1
mscanConfig.filterConfig.u32IDMR0
mscanConfig.filterConfig.u32IDMR1

But I don't understand how these lines work for what to set them to allow everything to bel recieved

Re: FRDM-MKE06Z MSCAN Recieve All

Robin_Shen — Fri, 03 Dec 2021 07:43:12 GMT

Hi Steven,

Recommend you to read this AN12355 Using MSCAN on KE16Z MCU, it should be able to help you understand it.

Best Regards,
Robin
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Re: FRDM-MKE06Z MSCAN Recieve All

stevenlutz — Sat, 04 Dec 2021 02:31:55 GMT

Re: FRDM-MKE06Z MSCAN Recieve All

stevenlutz — Sat, 04 Dec 2021 02:33:05 GMT

Thanks Robin,
I have tried extensively to understand this.
my problem is that I want to only allow CAN ID's that include a PGN of: 0x1F801
An example ID would be 0x9F80102
I currently have the acceptance register and mask set to the following:
AR set to: 7FF803FF
MR set to: 7FF801FF

My test incoming can ID of 09F80102 is passing the filters while others are not coming in as expected. However I'm not confident this is correct all future cases including 1F801 will pass.
Can you please verify and let me know if there is something that I should do different to exclusively allow can frames with at PGN on 1F801? Thank you

Thank you

Re: FRDM-MKE06Z MSCAN Recieve All

Robin_Shen — Tue, 07 Dec 2021 09:21:17 GMT

Please try to use:

#define NODE_ID1 0x1F80100
#define MSCAN_IDMR0 ~((uint32_t)(MSCAN_RX_MB_EXT_MASK(NODE_ID1)))
#define MSCAN_IDMR1 ~((uint32_t)(MSCAN_RX_MB_EXT_MASK(NODE_ID1)))

Re: FRDM-MKE06Z MSCAN Recieve All

stevenlutz — Tue, 07 Dec 2021 23:03:19 GMT

Can you explain the MSCAN_RX_MB_EXT_MASK function?

Re: FRDM-MKE06Z MSCAN Recieve All

Robin_Shen — Wed, 08 Dec 2021 01:14:06 GMT

It's MsCAN Rx Message Buffer Mask helper macro.

It converts CAN ID into Message Buffer format.