NRF8001 RDYN Held High

RE: NRF8001 RDYN Held High

Soren — Tue, 21 Jan 2014 01:03:30 GMT

So I fixed my issue and I have a few suggestions for anyone who runs into the same problem:

Delete the dummy byte (0x00) at the beginning of each ACI packet generated by nRFgo Studio. However, I still send a full packet of 6 dummy bytes at the beginning to read the initial DeviceStartedEvent. In my experience, too many dummy bytes seem to confuse nRF8001.
Always start by resetting nRF8001. Pull the RESET line low. Wait at least 200ns. Pull the RESET back high. Then wait at least 62ms. Note that the 1st one is in nanoseconds and 2nd one is in milliseconds.
Slow down the SPI clock. Clean up your SPI code and make sure all the timings are correct.

RE: NRF8001 RDYN Held High

Soren — Sat, 18 Jan 2014 02:45:04 GMT

Hi Nordic folks,

I'm experiencing a similar problem and so the setup process is not successful. I'm able to send a few ACI packets but then the RDYN line is held high and does not respond when I set my REQN low for more ACI commands.

I checked my nRF8001 by changing the operation mode from Setup to Test and sending the Echo command, and I successfully received the EchoEvent. So the chip should be fine.

Any idea why nRF8001 keeps the RDYN line high after a few ACI packets and does not recognize that I set my REQN low?

Cheers, Soren

nRF8001-ACI.JPG

RE: NRF8001 RDYN Held High

Matthew — Thu, 02 Jan 2014 19:04:38 GMT

Great! Thanks for your help, I'll contact the support team.

-Matthew

RE: NRF8001 RDYN Held High

David Edwin — Thu, 02 Jan 2014 07:35:02 GMT

Hi,

I assume that the nRF8001 is powered and you did a pin reset for the first time. The nRF8001 will send the Device Stated Event and as a result the RDYN line will go low. Your problem is that the RDYN does not go low.

I assume that you have followed the reference design as stated in the datasheet and in the downloads section of the nRF8001 ( www.nordicsemi.com/.../nRF8001 -> Downloads -> Reference layout files )

The section on the 16 MHz crystal oscillator in the datasheet also contains some pointers

You can get a review of the schematic and layout done by contacting the support team at www.nordicsemi.com/.../Contact-Support-Team . Register in the mypage and open a new case in your mypage for the review.