topic Re: LPC55S69, DMA and DMA_ITRIG_INMUX in LPC Microcontrollers

LPC55S69, DMA and DMA_ITRIG_INMUX

i_kamal — Sat, 23 May 2020 19:02:01 GMT

Hi,

I am working on a project where i need to read a GPIO port at a fixed frequency (a couple of MHz) and I want to use a DMA triggered by a CTIMER to achieve that.

All of which seems totally possible according to reference manual (UM11126).

Now, when i read chapter 22.5.1.2 is says i need to configure DMA_ITRIG_INMUX registers.

The (big) problem is that I can't find this register anywhere. Nor in the reference manual's registers section, nor in the register definitions *.h file.

Is this an error?

Are there any examples using hardware trigger?

Thanks,

Re: LPC55S69, DMA and DMA_ITRIG_INMUX

i_kamal — Sat, 23 May 2020 19:06:21 GMT

Nevermind, i found the answer on chapter 18 (INPUTMUX).

Now, i'm still interested in an example if someone has one though...

Thanks!

Re: LPC55S69, DMA and DMA_ITRIG_INMUX

xiangjun_rong — Mon, 25 May 2020 06:26:13 GMT

Hi, Ibrahim,

I have not found the example that the external signal triggers DMA to transfer in SDK package.

I will try to develop an example later if I have time.

XiangJun Rong

Re: LPC55S69, DMA and DMA_ITRIG_INMUX

i_kamal — Mon, 25 May 2020 09:10:53 GMT

That would be great! Thanks