Kinetis MicrocontrollersのトピックRe: Does the MK22 support 16bytes(line) burst model

Does the MK22 support 16bytes(line) burst model

hengwu — Mon, 09 Jan 2017 08:45:23 GMT

I use the chip MK22FX512VLL12.

I wanna know if the chip support 16bytes(line) burst model?

Referring to the reference manual, line transfers are not possible from Cortex-M4 core.

Is it true?

Re: Does the MK22 support 16bytes(line) burst model

Jonathan_Iglesias — Tue, 10 Jan 2017 21:05:52 GMT

Dear heng wu,

Yes it does in fact there is a document and some examples created by our friend Carlos_Musich. I will attach them if you have more questions please let me know.

have a great day.

Jonathan

Re: Does the MK22 support 16bytes(line) burst model

hengwu — Wed, 11 Jan 2017 00:55:06 GMT

Thank you for your reply.

After reading the example，I understand that the K22 chip can realize 16 bytes burst model with the help of DMA .

Is it right？

Re: Does the MK22 support 16bytes(line) burst model

Jonathan_Iglesias — Wed, 11 Jan 2017 15:35:29 GMT

HI heng wu,

you are right.

Jonathan

Re: Does the MK22 support 16bytes(line) burst model

hengwu — Thu, 12 Jan 2017 03:16:07 GMT

Hi,Jonathan Iglesias

I want to do as follows.

The source address of the eDMA is the address of the 16bytes that is written to external MRAM.

The destination address of eDMA is the MRAM address.

After configuring the eDMA and flexbus, first do the busrt write then do the eDMA request via software .

Is there someting wrong in this method ?