topic LPC54102 - Do the timers require interrupts to trigger DMA transfers, or a match with a chosen value is enough? in LPC Microcontrollers

LPC54102 - Do the timers require interrupts to trigger DMA transfers, or a match with a chosen value is enough?

doini — Mon, 12 Sep 2016 21:40:48 GMT

I am working with LPC54102 to transfer data from certain buffers to the GPIO outputs.

The time is critical and I do not need interrupts each time a DMA transfer needs to be triggered.

Is it enough to program a timer (that can trigger a DMA channel) with a match value, and each time the TC will match that value a flag will trigger the DMA without interrupting (and going into the ISR in order to clear the interrupt)?

I would really appreciate your answer.

Thank you,

Doini

Re: LPC54102 - Do the timers require interrupts to trigger DMA transfers, or a match with a chosen value is enough?

jamesm — Tue, 18 Oct 2016 16:39:05 GMT

Hi Doini

Did you ever get this figured out? I am doing the same thing. I believe that there should be no interrupt necessary and that the match should be able to trigger the DMA unrelated to the exernal match pins. I have not been able to get this to work but I think that I am close. I posted a question about this including my LPCOpen code yesterday called "Cannot get DMA triggered with Timer Match".

Good Luck - James

Re: LPC54102 - Do the timers require interrupts to trigger DMA transfers, or a match with a chosen v

skanda19 — Wed, 04 Oct 2023 21:31:20 GMT

did you guys figure it out ? haha