S32K144 CAN Extended ID (FCAN_Send)

[gramirezv]

Hi,

I'm using a S32K144EVB, with the "Model-Based Design Toolbox for S32K1xx Series Version 2018.R1".

And, I'm trying to send a CAN message with Extended ID (29-bit). In the FCAN_Send block, I click the "Extended ID" checkbox and set the ID to 18FF0000.

But when I monitor the CAN bus, the ID is set to 0.

I tried using a Standard ID (Extended ID checkbox unchecked) and it works just fine.

I looked into the generated C code for this block I noticed the following.

308/* S-Function (fcan_s32k14_send): '<S8>/FCAN_Send' incorporates:
309 * Constant: '<S8>/TX_CAN_Data_Length'
310 */
311    {
312       uint8_t* data = &main_B.dr_TX_CAN_Data[0];
313       flexcan_data_info_t txInfo = {
314       .msg_id_type = FLEXCAN_MSG_ID_STD,
315       .data_length = ((uint8_T)8U),
316       .fd_enable = false,
317       .fd_padding = 0x0,
318       .enable_brs = false,
319       .is_remote = false
320    };
321
322    FLEXCAN_DRV_ConfigTxMb(0, 13, &txInfo, 0x800);
323    FLEXCAN_DRV_Send(0, 13, &txInfo, 0x800, data);
324 }

The msg_id_type is set to FLEXCAN_MSG_ID_STD, instead of FLEXCAN_MSG_ID_EXT

Is there a way to get this working, I really need to use the Extended ID since I'm working with J1939.

Thanks a lot,

Gustavo

[constantinrazva]

Hello gramirezv‌,

It is indeed a strange behavior, I will take a look at the code generation and get back to you probably tomorrow with a fix.

Kind regards,

Razvan. 

[gramirezv]

Hi constantinrazvan.chivu‌,

Thanks a lot for your quick response (as usual) :smileyhappy:

Best regards,

Gustavo

[constantinrazva · Accepted solution]

Hello gramirezv‌,

I have the hotfix for setting the extended ID.

Please replace the following file

{install_dir}\mbdtbx_s32k14x\mbdtbx_s32k14x\mscripts\fcan\mbd_s32k14_fcan_send_sdk_params.p

with the file attached.

Thanks gabrielacatana for providing this fix.

Kind regards,

Razvan.

[sparkee]

Is this hotfix still necessary?  I seem to have a similar issue.  Unfortunately I'm unable to read the p code to decipher whether or not this was incorporated into the latest release.

[sparkee]

Looks like it breaks something now.  Won't build.

[constantinrazva]

Hello sparkee‌,

These fixes were integrated in the latest release (v4.1) - so you don't need the patch. There were some changes to the toolbox from the previous release, so that is why it breaks (searches for different paths to blocks, etc.). 

Kind regards,

Razvan.

[gramirezv]

Hi constantinrazvan.chivu‌,

Thank you and gabrielacatana‌ for providing this hotfix, I really appreciate your prompt response.

I replaced the file per your instructions and it's working as expected. I got the Extended ID message transmitted properly.

Best regards,

Gustavo