topic Re: what is the purpose of the mailbox id? in S32K

what is the purpose of the mailbox id?

buccno — Wed, 28 Dec 2022 16:34:23 GMT

If the mailbox ID's purpose, for example

set the nth mailbox, When I increase the ID value, for example, if I double it, does the mailbox covers double?

Re: what is the purpose of the mailbox id?

Senlent — Thu, 29 Dec 2022 01:08:47 GMT

Hi@buccno

please take a look at the S32K-RM rev13

Re: what is the purpose of the mailbox id?

buccno — Thu, 29 Dec 2022 07:33:55 GMT

Actually, I cannot understand, If I increase the mailbox index, does my message buffer's memory area increase?

Re: what is the purpose of the mailbox id?

buccno — Thu, 29 Dec 2022 08:25:30 GMT

For example, I define a macro in my code, #define TX_MAILBOX_IDX 1 -> that means selected address offset?

If that is true, my address offset is 0090? or 0090 - 0080?
so,

I ask this because, in my code sample, I was changing the message buffer index value(RX or TX, RX and TX) anything changed. I use an 8-byte payload.

Re: what is the purpose of the mailbox id?

Senlent — Fri, 30 Dec 2022 03:04:58 GMT

Hi@buccno

I didn't understand your question. If you have questions about the details of FlexCAN, you can read our data sheet, and we also have a complete demo for customer reference,

for example:

https://community.nxp.com/t5/S32K-Knowledge-Base/S32K1xx-FlexCAN-Mask-Setting-Demo/ta-p/1519753

https://community.nxp.com/t5/S32K-Knowledge-Base/S32K-Examples/ta-p/1108990