Flexcan Receive without filtering

Alex19 — Mon, 14 Feb 2022 10:18:02 GMT

Hello NXP Community,

I use S32K144 board, and i need to receive can messages without filtering and send the data with UART I found in other topics, how to realise this.

uint16_t MSG_ID = 0x07FF;

/*Initialize the FlexCAN module */

FLEXCAN_DRV_Init(INST_CANCOM1, &canCom1_State, &canCom1_InitConfig0);

/* Enable message buffer global masking */

FLEXCAN_DRV_SetRxMaskType(INST_CANCOM1, FLEXCAN_RX_MASK_GLOBAL);

/* Set the global mask as "don't care" for each message buffer */
FLEXCAN_DRV_SetRxMbGlobalMask(INST_CANCOM1, FLEXCAN_MSG_ID_STD, 0U);

flexcan_data_info_t dataInfo =
{
.data_length = 8U,
.msg_id_type = FLEXCAN_MSG_ID_STD,
.enable_brs = false,
.fd_enable = false,

.fd_padding = 0U
};

/* Configure message buffer 0 for reception */

FLEXCAN_DRV_ConfigRxMb(INST_CANCOM1, 0U, &dataInfo, MSG_ID);

/* Start receiving data in message buffer 0 */

while (1)

{

if (FLEXCAN_DRV_Receive(INST_CANCOM1, 0U, &recvBuff) == STATUS_SUCCESS)

{

send with UART;

}

So it works. I receive for example 7 CAN messages with ID 0x010,0x011, 0x012, 0x013, 0x014, 0x015, 0x016. But I have a question, why I receive 0x012, 0x012, 0x010 etc. I mean I receive several time the same ID. Or I receive for example 0x013, 0x013,0x015, 0x013, 0x013 etc

Re: Flexcan Receive without filtering

PetrS — Mon, 14 Feb 2022 12:35:57 GMT

Hi,

when using non-blocking function, you should check if transfer is completed, so you can have below code

while(1)
{
FLEXCAN_DRV_Receive(INST_CANCOM1, RX_MAILBOX, &recvBuff);
/* Wait for the message to be received */
while (FLEXCAN_DRV_GetTransferStatus(INST_CANCOM1, RX_MAILBOX) == STATUS_BUSY);

send with UART
}

Re: Flexcan Receive without filtering

Alex19 — Wed, 16 Feb 2022 18:27:50 GMT

Helllo,

Yes it works, thank you very much

topic Flexcan Receive without filtering in S32K

Flexcan Receive without filtering

Re: Flexcan Receive without filtering

Re: Flexcan Receive without filtering