topic Re: K70 Can module: 32 or 64 mailbox? in Kinetis Microcontrollers

K70 Can module: 32 or 64 mailbox?

arnogir — Tue, 05 Jan 2016 10:05:29 GMT

Hello

I'm using the K70 150MHz with MQX 4.2 and KDS.

The datasheet of the K70 (Rev.3 November 2014) indicate only the register CANx_IMASK1/ CANx_IFLAG1, not the IMASK2/IFLAG2...

But in KDS3.0 with EmbSys Register I can visualise IFLAG2/IMASK2.

But on Can Clock Turn on in BSP init (sim->SCGC6 |= SIM_SCGC6_FLEXCAN0_MASK;)

only IFLAG1/IMASK1 are set to 0, IMASK2/IFLAG 2 not change and MASK2 stay to 0x80008000???

Also, in Datasheet §53.3.12 (CANx_CTRL2) on RFFN description, there is a table indicate how many remaining available mailboxes which can up to 64...

:smileyconfused:

So if there is realy 64 Maibox, the Clock turn on allow automaticcaly to Reset MASK/IFLAG1 to 0 but not the IMASK2/IFLAG2, in which case, MQX 4.2 has a bug by not setting the default value register to 0..?

So are they 32 or 64 mb in K70

Re: K70 Can module: 32 or 64 mailbox?

Hui_Ma — Wed, 06 Jan 2016 06:43:06 GMT

K70 has two identical FlexCAN modules.

Each FlexCAN module contains 16 message buffers.Wish it helps

Have a great day,
Ma Hui

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Re: K70 Can module: 32 or 64 mailbox?

arnogir — Wed, 06 Jan 2016 06:48:57 GMT

Ok,

I just saw this in the chapter §3.9.4 CAN Configuration

Thank you:smileyhappy: