i.MX RT Crossover MCUsのトピックDMAMUX_SetSource different CH same SOURCE.

DMAMUX_SetSource different CH same SOURCE.

shingofujiwara — Thu, 29 Jun 2023 07:07:09 GMT

Noe I try to output any pulse by FlexPWM by useing DMA.

Currently FlexPWM1 submodule0 A and B used independently.

I set DMA source kDmaRequestMuxFlexPWM1ValueSub0 to 2.

channnels.DMAMUX_SetSource(ALIGNMENT_MOTOR_DMAMUX, ALIGNMENT_Y_MOTOR_DMA_CH, kDmaRequestMuxFlexPWM1ValueSub0);
DMAMUX_SetSource(ALIGNMENT_MOTOR_DMAMUX, ALIGNMENT_X_MOTOR_DMA_CH, kDmaRequestMuxFlexPWM1ValueSub0);

A is memory to ALIGNMENT_MOTOR_PWM->SM[kPWM_Module_0].VAL3.

B is memory to ALIGNMENT_MOTOR_PWM->SM[kPWM_Module_0].VAL5

But it work only A.
B does not out pulses.

DMAMUX_SetSource can not support same source different channel ?

Re: DMAMUX_SetSource different CH same SOURCE.

_Leo_ — Wed, 05 Jul 2023 20:17:27 GMT

Hi,

Thank you so much for your interest in our products and for using our community.

Could you tell us which i.MX RT are you using please?

Re: DMAMUX_SetSource different CH same SOURCE.

shingofujiwara — Thu, 06 Jul 2023 00:01:24 GMT

Thank you.

I use i.MXRT 1062.

Now I changed software structure.

DMA PWM1 submodule0 trigger -> PWM1 VAL3
PMW1 - Submodule0 - A ---> XBARA(PWM1 OutputTrigger) -- XBARA(INOUT04)

DMA PWM3 submodule0 trigger -> PWM3 VAL3
PMW3 - Submodule0 - A ---> XBARA(PWM3 OutputTrigger) -- XBARA(INOUT05)

Currently, it works well.