How to setup KW36 FlexCAN multiple mailbox?

frankxu — Wed, 04 Sep 2019 03:30:53 GMT

Can any NXP engineer help me?

KW36 can set receive MASK to receive data by different mailbox by this funciton.

FLEXCAN_SetRxMbGlobalMask(HMI_CAN, FLEXCAN_RX_MB_STD_MASK(rxIdentifier, 0, 0));

by this function, only setup one mailbox. I have two RX ID , how to initial/setup?

and how to get the data by flexcan_callback() function?

static void flexcan_callback(CAN_Type *base, flexcan_handle_t *handle, status_t status, uint32_t result, void *userData)
{
switch (status)
{
case kStatus_FLEXCAN_RxIdle:
if (RX_MESSAGE_BUFFER_NUM == result)
{
rxComplete = true;
}
break;

case kStatus_FLEXCAN_TxIdle:
if (TX_MESSAGE_BUFFER_NUM == result)
{
txComplete = true;
}
break;

default:
break;
}
}

Could you please give me one demo code to show how to work?

Re: How to setup KW36 FlexCAN multiple mailbox?

FelipeGarcia — Fri, 06 Sep 2019 16:18:47 GMT

Hello Frank,

Please check my answers below:

1. Please check the following links as reference. I believe they could be useful.

https://community.nxp.com/thread/484816

https://community.nxp.com/thread/475008

https://community.nxp.com/thread/453975

2. In SDK examples flexcan_callback is only used to set flags such as rxComplete or txComplete. If you want to get the received or transmitted data I recommend you to use rxXfer.framefd and txXfer.framefd if you are using CAN FD or rxXfer.frame and txXfer.frame if you are using CAN.

Also, I recommend you to check chapter 37.3.2.5 of the reference manual.

I hope this helps!

Have a great day,
Felipe

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Wireless MCUのトピックHow to setup KW36 FlexCAN multiple mailbox?

How to setup KW36 FlexCAN multiple mailbox?

Re: How to setup KW36 FlexCAN multiple mailbox?