Dear NXP
I am using MRCANHUBK344 evaluation board to develop CAN application with MBDT toolbox and S32 configuration tools , now i can successfully use FLexCAN0~FlexCan3 to transmit and receive msgs，but
i can't use FlexCAN4 and FlexCAN5 which are TJA1153A aka secure CAN Transceiver, Please give me some advice and help。
Thanks !
Harry Qi
Hello @HarryQi ,
Since the TJA1153 is a secure CAN Transceiver, its initialization process is different from the other 2 types present on the board.
For reference, you could open the s32k3xx_can_transmit_ebt.mdl example from the S32K3_Examples/can folder and take a look at the initialization sequence for TJA1153.
You can also copy the TJA1153_Init MATLAB Function and paste it in into your model, instead of the DIO blocks used to control the STB and EN pins.
First of all, the inputs to the MATLAB Function are as follows:
- canExtHwId - represents the ID of the polling transmit hardware object set in the CanConfigSet->CanHardwareObject section of the configuration tool
- canEnDioChannel - represents the CAN_EN pin's MSCR as hex
- canStbDioChannel - represents the CAN_STB pin's MSCR as hex
- canErrnDioChannel - represents the CAN_ERRN pin's MSCR as hex
Afterwards, there's one more thing you should keep in mind. For the transceiver to work properly, a power cycle is required in the current version, meaning that after the code is uploaded on the board, the board's power supply should be disconnected and then reconnected. This should also be done after the reset button has been pressed, to allow the transceiver to switch to a normal working state.
Regards,
Robert V
Thank you so much for your reply！
I did what you said ,but i still can't make it work ,i attach my initialization screenshot here,and .mex file ,could you help me check whether it is right ! Thanks again !
Hello @HarryQi ,
After taking a look at the attached model, there is one thing that stood out to me as a possible problem.
For the blocks to function properly, they also require the Can_SetControllerMode block with the mode set to CAN_CS_STARTED. This should be done for both of the CanControllers 4 and 5, as seen below.
Could you try to add these blocks and, along with the mentions regarding the power on-off cycle, check whether the problem is gone?
Please let me know if this has fixed your issue.
Regards,
RobertV
Hello @HarryQi ,
Based on the model you have attached here, I added the Can_SetControllerMode set to CAN_CS_STARTED, as mentioned in the previous reply.
Additionally, inside the configuration, I set the Initial Value for LED_CAN4 and LED_CAN5 to HIGH so they are turned off by default. I have also set the Message ID for Can4 to "4" and for Can5 to "5" so they are easily identifiable on the CAN Bus.
After building and downloading the model to the board, LED_CAN4 and LED_CAN5 are turned ON. I disconnect the board's power supply and then reconnect it. At this point, all the CAN LEDs are OFF and the CAN messages can be seen when checking the Can Analyzer connected to the CAN Bus (only connected to CAN4 and CAN5):
I have also attached the .bin and .elf files, so you can test another scenario by downloading them directly to the board using the mbd_s32k3.nxp.download.jlink('./mrcanhubk344_can_s32ct.bin') command, ran in MATLAB, in the same folder as the .bin file.
Note: a board reset using the reset button is not a substitute for the power cycle, and it should be done after every reset/code upload when using the TJA1153 transceiver and the current version. Also, all the CAN ports should be populated for instances that are supposed to be communicating. On my board I have the following connections:
If after these steps the issue still exists, do not hesitate to reach out again.
Regards,
Robert V
Hello @HarryQi ,
I am glad to hear that the model is now working properly for you.
If you want to send three different CAN messages from the same instance, on the same execution step, the solution involves using 3 Can Write blocks and configuring the CAN hardware object to support 3 items.
As for receiving specific messages, I hope I am not misunderstanding your request, but if you want to filter messages and only receive messages corresponding to specific IDs, you could use the filters described in the chapter 2.3.2. from the article about using MR-CANHUBK344 to communicate with CAN https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/Communicating-over-the-CAN-Bus/ta-p/175845... .
Regards,
Robert V
Hello @HarryQi ,
Using the CanIf_RxIndication interrupt block you can process the messages that are received by the CAN instances. The block has a few outputs that can help you identify which instance/controller received the message and what the message's content is.
One more thing you should pay attention to. In the configuration used by your project, the RECEIVE objects are set to POLLING and in order to receive CAN messages, an additional block has to be used:
The alternative would be to configure RECEIVE hardware objects that use interrupts instead of polling, which would work without the need for the Can_MainFunction_Read block.
To simplify the process, you could store these in Data Store Memory variables and shown in FreeMASTER.
Note: the variables must be configured as "Volatile". More details about how to achieve that can be found in the chapter 5 of the article https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/Sending-data-via-UART-and-monitoring-signa...
Regards,
Robert V
