SPIM DMA nrf52840

[hzqn1234]

Hi

Is there a sample code for SPIM DMA nrf52840? I only found smaple code for SPI in the development kit. Thanks for helping.

Best Regards ZQ

[endnode]

What do you mean by

"I only found smaple code for SPI in the development kit"?

All SPI Master examples should by default use SPIM HW peripheral block with DMA... see sdk_config.h file in the example you are using.

[hzqn1234]

Using that SPI sample code, I am able to set the mode as SPIM DMA. But I would like to know how I can configure this DMA mode. For example, what should I do if I want to set the max buffer size for transfer/receiver before the data is read/write by the MCU.

[hzqn1234]

I see.. if I am using nrf_drv_spi_transfer, the buffer size set here is equivalent to the actual buffer size for tx/rx. Thanks for helping.

[endnode]

OK, the answer should be in nRF52840 Objective Product Specification and nRF5 SDk v13.1.0 documentation of SPIM driver module.