Input trigger + DMA transaction

[sadkotheguest]

Hello!
Is there an example in the SDK of running a DMA block on an external trigger (i.e. similar with ETR input in TIMs of STM32 MCUs or with PWM input capture)?

What is the easiest way to solve the problem of capturing an external signal (changing positive polarity to negative and vice versa) and generating a DMA event (which will expose a certain set of bits stored in memory to the GPIO port)?

[chenzhihong007]

You can use gptmr to capture input signals, and gptmr can gernerate the capture dma request.

The key information in user manual as follows:

Also, hpm_sdk has an example, you can refenrence hpm_sdk/samples/drivers/dma/dma_use_gptmr_event_transfer, and select gptmr_dma_request_on_input_signal_toggle test mode.

[sadkotheguest]

You can use gptmr to capture input signals, and gptmr can gernerate the capture dma request.

Also, hpm_sdk has an example, you can refenrence hpm_sdk/samples/drivers/dma/dma_use_gptmr_event_transfer, and select gptmr_dma_request_on_input_signal_toggle test mode.

Thank you for the information!