NRF52 TWI easyDMA

[Riaan]

I am buys setting up a project on the NRF52 that needs to use the TWI.

Usually I would read byte for byte, and if one of the registers has enough data to justify it, I would do a DMA transaction to read out its contents.

I am new to tis easyDMA stuff. What I want to know is can you switch between the easyDMA and normal read, or is it one or the other?

I also cant seem to find an example that uses easyDMA. Not sure about the use.

I can see I need to enable easyDMA for the TWI in sdk_config. But I cant seem to find the actual use. Take it there would be a callback when operation is done.

[Jimmy Wong]

You can refer to the example at https://github.com/Martinsbl/nrf5-mpu-examples/tree/master/nrf52-mpu-easydma-using-timers-and-drivers

[Nguyen Hoan Hoang]

This driver is very simple to use and supports both with or without easyDMA. This driver works for nRF51x, nRF52x, nRF91x

https://github.com/IOsonata/IOsonata/blob/master/ARM/Nordic/src/i2c_nrfx.cpp