HOW TO READ DATA FROM A REGISTER USING SPI

RE: HOW TO READ DATA FROM A REGISTER USING SPI

Håkon Alseth — Fri, 31 Jul 2020 06:28:55 GMT

Hi,

If you set the spi event handler to "NULL" when initing nrf_drv_spi, then you're setting the driver in blocking mode. If you init with an event handler, then its in non-blocking mode.

In your case, you can either set it in blocking mode (set event handler to NULL) or handle the _BUSY return in your SPI function.

Kind regards,

Håkon

RE: HOW TO READ DATA FROM A REGISTER USING SPI

RJD — Thu, 30 Jul 2020 15:10:57 GMT

Hello, I am actually using that same code, its just an additional function in it. I am not getting anything. How to set it up in non-blocking mode?

RE: HOW TO READ DATA FROM A REGISTER USING SPI

Håkon Alseth — Thu, 30 Jul 2020 09:28:53 GMT

Hi,

Are you setting up the nrf_drv_spi in non-blocking mode? If yes, then it is expected to see NRF_ERROR_BUSY if you do not wait until the former SPI transaction is done.

Please see the nRF5 SDK example "peripheral/spi/" and look at how it handles variable "spi_xfer_done".

Kind regards,

Håkon