Kenitis KL05 DMA channel source

[cfk]

Hi,i am recently use Kenitis family MCU KL05Z32 , but i conldn't find the dma channel source's details ,neither datasheet nor RM document,where could i find the dma request source of KL05? Could somebody help me?

[migry]

Having used DMA in a small number of experimental configurations, and found the documentation "lacking".

I think naming this field as "SOURCE" is confusing.

DMA transfers are triggered by some event, which can include a ALWAYS trigger.

The SOURCE is the source of the TRIGGER.

For some reason the PIT timer gets a special feature in that the TRIG selects the PIT timer overflow as the trigger, but with limitations that you can only use DMA0 with PIT0, DMA1 with PIT1, etc.

While some of the trigger "sources" are obvious, there are a few which I couldn't figure out from the reference manual.

[xiangjun_rong]

Hi,

As the section 3.4.8.1 DMA MUX request sources, the source number in Table  20 define the DMA request source.

The DMA triggering source can only be PITx channel, this is a special case, it can manipulate GPIO with PIT cycle.

Hope it can help you

BR

XiangJun Rong

[xiangjun_rong]

Hi,

Pls refer to section 3.4.8.1 DMA MUX Request Sources in reference manual of KL05.

Hope it can help you

BR

XiangJun Rong