nrf8001 reset

[Bob Louwe]

BobLouwe.logicdataHi devs,

I'm setting up my own .NET mircro framework stack for the Adafruit nRF8001 Break Out board. When write the Reset port I do get an interrupt on the Ready port, but when I start reading from the SPI I getting all 0xFF. When I send a Test command (0x02, 0x01, 0x02) and put the REQN low (or REQ high) I do get the interrupt on the Ready port, but reading from the SPI gives me all 0x00.

I assume my SPI is not configured correctly, but I've read the documentation and it seems to be correct.

Thanks.

EDIT:

Capture file

EDIT: Bob Louwe clock low.logicdata

[Bob Louwe]

I connected a logic analyzer and step-by-step solved my (stupid) mistakes. The biggest issue was that there was no clock signal. This was caused by addressing the wrong SPI module. So the timing issues and the SPI issues are solved, but... After the reset I read the first two bytes 0x00 and 0x82. According the spec the first byte should be ignored and the second byte is the length and hould be smaller than 31. I expect the DeviiceStartedEvent. Any suggestions? Is it possible to add a picture to comments?

[Bob Louwe]

I discovered that I pull the reset high, while I should pull it low for at least 200ns, according to the sheet. I will try that.

[run_ar]

So, how are you doing? I would recommend that you continue using your logic analyzer to debug this. Check that you see the same data here as on your application mcu. If you upload the capture file I could take a look at it as well. Unfortunately you cannot upload pictures in the comment, but you can upload pictures in the question itself.

[Bob Louwe]

I have added the capture file. This is the scenario where I pull the reset high and I get the 0x00 and 0x82. I still have to test when I pull it low.

[run_ar]

I cannot see the MISO line in. Could you upload the actual file? I see data being transmitted on MOSI. Could you wait with this until after you have received the device started event.