topic Re: MQX CAN Driver in MQX Software Solutions

MQX CAN Driver

murugan_m — Wed, 26 Mar 2014 12:04:12 GMT

Hi,

I am new to MQX. Currently i am using MQX 3.8 for the K20 processor. Looking into the CAN driver of MQX, i think it wont support Reception FIFO feature.

My question is suppose there is two active reception mail boxes, which of these two mailboxes are occupied first when a new CAN message is received? Is it depends on mailbox number or what else?

Re: MQX CAN Driver

danielchen — Sat, 29 Mar 2014 13:47:23 GMT

The FlexCAN hardware module supports features like Rx FIFO or Rx Queue, but they are not enabled in MQX 3.8 and MQX 4.0 FlexCAN driver.

Now in the latest MQX release is 4.1. we added RX FIFO support for twrk70120m board, please refer to driver code.

C:\Freescale\Freescale_MQX_4_1\mqx\source\io\can\flexcan\fsl_flexcan_driver.c

Regarding who occupied first, according to datasheet, The scan order for mailboxes and Rx FIFO is from the matching element with lowest number to the higher ones

Have a great day,
Daniel

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Re: MQX CAN Driver

thegreendroid — Wed, 22 Oct 2014 22:49:37 GMT

Hi Daniel,

When will the Rx FIFO functionality be implemented for the Kinetis MCU's?

Regards,

Shreyas