RT1024 dma nested Loop mode

[2548903578]

Hello，everyone

When I configured the QTMR input capture to trigger the DMA request, I set the value of NBYTES and CITER. According to the normal situation, an edge is triggered every time to trigger the DMA request. After CITER, the DMA interrupt is triggered, but after testing, it is found that when there is an edge All CITER will be executed. After testing, I found that when there is an input edge, the IEF bit of the SCTRL register in qtmr will always be set to 1, and this bit must be cleared manually. I would like to ask if it is because of this reason that all CITER in dma will be executed directly after an edge is generated? If so, how would I solve this problem? I only want to make an input capture request once for NBYTES, and then trigger the DMA interrupt after CITER input capture.

[jeremyzhou]

Hi，
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
To provide the fastest possible support, I'd highly recommend you refer to qtmr_inputcapture_outputpwm_dma demo project in the SDK library.
Have a great day,
TIC

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