topic Re: S32K144 can in S32K

S32K144 can

Ada-gc — Tue, 17 May 2022 09:48:10 GMT

I want to change the specified bit when sending CAN data. What should I do?

Re: S32K144 can

PetrS — Tue, 17 May 2022 10:52:49 GMT

Hi,

if you want to send new std ID value just modify ID standard filed of selected MB having IDE=0 and let module to send it by updating CODE field. If running SDK driver simply use Send function

If you want to flip bit of sending message, to disturb a frame, then module is not able to do that.

BR, Petr

Re: S32K144 can

Ada-gc — Wed, 18 May 2022 12:17:46 GMT

Sorry, I can describe it more clearly

When sending CAN data, the specified bit needs to be changed, and when receiving CAN data, it is necessary to judge whether the specified bit data is 0 or 1. Do you have any suggestions?

Re: S32K144 can

PetrS — Thu, 19 May 2022 08:18:20 GMT

Hi,

when sending message MB ID word specify teh ID to be send, when MB receive a message its ID word stores the ID received.

BR, Petr

Re: S32K144 can

Ada-gc — Fri, 20 May 2022 03:05:17 GMT

Can I do this by reading and writing this struct？

Re: S32K144 can

PetrS — Fri, 20 May 2022 11:30:25 GMT

Hi,

yes this structure is used for buffer variable used for receiving. After successful message receiving this variable is updated

/* Define receive buffer */
flexcan_msgbuff_t recvBuff;

/* Start receiving data in RX_MAILBOX. */
FLEXCAN_DRV_Receive(INST_CANCOM1, RX_MAILBOX, &recvBuff);

To send message below is used and the ID is parameter of Send function

flexcan_data_info_t dataInfo =
{
.data_length = 8,
.msg_id_type = FLEXCAN_MSG_ID_STD,
.enable_brs = false,
.fd_enable = false,
.fd_padding = 0U
};

/* Execute send non-blocking */
FLEXCAN_DRV_Send(INST_CANCOM1, mailbox, &dataInfo, messageId, data);

BR, Petr

Re: S32K144 can

Ada-gc — Mon, 23 May 2022 01:57:55 GMT

thank you very much

Re: S32K144 can

Ada-gc — Fri, 10 Jun 2022 05:36:51 GMT

Excuse me, the ID data type in the structure is uint_32, and the 18th to 28th bits represent the arbitration ID?

Re: S32K144 can

PetrS — Fri, 10 Jun 2022 11:19:42 GMT

yes, you are right.

BR, Petr