Enable Clock for DMAMUX

[armendgecaj]

Hi all!

I am using Kinetis K60F MK60FN1M0 with CodeWarrior for MCU v10.6 and i have a question.

I want to enable the clock for DMAMUX but i get the problem report: 'error: 'SIM_SCGC6_DMAMUX_MASK' undeclared (first use in this function)'

I did this:

(1) SIM_SCGC6 |= SIM_SCGC6_DMAMUX_MASK; 

If i enable the clock for DMA then i did not get any problems (the code is: (2) SIM_SCGC7 |= SIM_SCGC7_DMA_MASK;

--> here is no problem).

Why i get only by the code (1) the problem report?

Do i need some header files?

Best Regards 

Armend

[armendgecaj]

OK i think i have the solution.

I think i have two DMAMUX. 

So if i write SIM_SCGC6 |= SIM_SCGC6_DMAMUX0_MASK; then i get no error.

But i have a other question. I also tried to use the DMA_LDD Component.

There is a structure. It is called: LDD_DMA_TTransferDescriptor.

If i write in the structure at TriggerType the command LDD_DMA_HW_TRIGGER then i will have a hardware trigger. But how can i make a GPIO signal as a trigger (for example a button)?

I think i have to write something at TriggerSource. But what?

Best Regards

Armend

[Alice_Yang · Accepted solution]

Hello Armend,

Please refer to the Reference Manual.

1) -  The DMA Source , please configure the  register of DMAMUXx_CHCFGn -> SOURCE :

About the source , please check the part of   3.3.9.1 DMA MUX request sources on RM.

- Yes, you can use the gpio to trigger DMA , about how to trigger ( rising or falling edge) ,please check the PORTx_PCRn register on PORT part .

2)  There is a easy way to configure , create a Processor Expert project on CW, then add the component of

"DMATransfer_LDD" , on the configure view , you can choose the Trigger source :

Also there is a demo , DAC trigger DMA,  you can refer to :

Hope it helps

Have a great day,
Alice

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[armendgecaj]

Hi Alice

i am sorry, i am late. Thank you very much for your help.

Best Regards

Armend