S32KのトピックRe: FlexCAN Module not able to send the data on CAN Bus

FlexCAN Module not able to send the data on CAN Bus

Kallappa — Thu, 08 Apr 2021 03:44:51 GMT

Hello NXP, I am trying to use the FlexCAN Module with s32k148 Board and send the data via the CAN Bus but data is not able to send on the bus. I attached the code, let me know if something is missing in the configuration.

Re: FlexCAN Module not able to send the data on CAN Bus

Kallappa — Thu, 08 Apr 2021 03:45:54 GMT

Re: FlexCAN Module not able to send the data on CAN Bus

Robin_Shen — Thu, 08 Apr 2021 07:22:54 GMT

Hi Kallappa,

There are two FlexCAN examples in S32 SDK that you can refer: can_pal_s32k148 and flexcan_encrypted_s32k148

For example: Please read the documentation of can_pal_s32k148 first.

The example documentation can be found in the S32 SDK documentation at Examples and Demos section. (<SDK_PATH>/doc/Start_Here.html)

Then configure the PCAN-Pro according to the FlexCAN configuration:
CAN FD
Arbitration Phase 500Kbps
Data Phase 1000Kbps

After press SW3 and SW4, the PCAN-Pro will show the CAN message sent from S32K148EVB board 1.

Best Regards,
Robin
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Re: FlexCAN Module not able to send the data on CAN Bus

Kallappa — Fri, 09 Apr 2021 03:46:44 GMT

Hello Robin,
Thanks for the Quick Support.
As you suggested I went through the example of the FlexCAN encrypted and I am able to run the code successfully,
But for my use case, I slightly modified the main.c file, because I want to send on start one can message to other board.PFA attached main.c file.
But I am not able to get the data on CAN-BUS even I tried to send the data.

Can you please guide me in this what I missed here?

Thanks,

Re: FlexCAN Module not able to send the data on CAN Bus

Robin_Shen — Fri, 09 Apr 2021 07:46:20 GMT

Re: FlexCAN Module not able to send the data on CAN Bus

Kallappa — Mon, 12 Apr 2021 07:11:32 GMT

Hello Robin,

Thanks a lot for your great support.
now I am able to send the data on can BUS, it is creating interest now in learning the CAN in guidance of you.
Robin, now I want to receive the data as well for that I wrote the code as below attached the DOC.
but not able to receive the data, I was checking the receive buffer but the data is not updated in that buffer.

Kindly help me with this.

Once again thanks,
Kallappa

Re: FlexCAN Module not able to send the data on CAN Bus

Robin_Shen — Tue, 13 Apr 2021 07:24:26 GMT

When I send CAN data from PCAN, the S32K148EVB is able to toggle LED.(Did you send the data with ID: 74Eh ?)

Re: FlexCAN Module not able to send the data on CAN Bus

Kallappa — Wed, 14 Apr 2021 03:51:14 GMT

Hello Robin,

my setup is like NXP board is connected with r-pi with CAN Bus and for sending the data i am using the r-pi terminal with the following command.

cansend can0 74E#11111111

NXP Board Side :
My Config is as mentioned below for the Rx and Tx
#if defined(MASTER)
#define TX_MAILBOX (1UL)
#define TX_MSG_ID 0x74F
#define RX_MAILBOX (2UL)
#define RX_MSG_ID 0x74E

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

/* Configure RX message buffer with index RX_MSG_ID and RX_MAILBOX */
FLEXCAN_DRV_ConfigRxMb(INST_CANCOM1, RX_MAILBOX, &dataInfo, RX_MSG_ID);

======================================================================

flexcan_msgbuff_t recvBuff;

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

/* Wait until the previous FlexCAN receive is completed */
while(FLEXCAN_DRV_GetTransferStatus(INST_CANCOM1, RX_MAILBOX) == STATUS_BUSY);

Re: FlexCAN Module not able to send the data on CAN Bus

Robin_Shen — Tue, 20 Apr 2021 03:13:05 GMT

Sorry for the delay!
Would you please check if r-pi terminal is corrected configured? I modified the flexcan_encrypted_s32k144 as you shown me in main.
The LEDs is able to toggle.(Check the received message ID toggle LED after FLEXCAN_DRV_Receive )