nRF8001 - RDYN pin not going HIGH after readout

RE: nRF8001 - RDYN pin not going HIGH after readout

paul.k — Mon, 09 Apr 2018 09:41:29 GMT

I'm attaching a logic analyzer file.

The nRF sends the DeviceStartedEvent and I'm clocking further on the SCK line, but there are no more messages from the IC. https://drive.google.com/file/d/1tNHGx3h5sJit7mbxqSghGpeysaW80gKr/view?usp=sharing

RE: nRF8001 - RDYN pin not going HIGH after readout

David Edwin — Thu, 05 Apr 2018 15:49:34 GMT

Can you give an SPI trace using a logic analyzer or

the bytes that you are sending from the SPI master and the bytes being received by the SPI master and the states of the REQN/RDYN and the Reset lines.

RE: nRF8001 - RDYN pin not going HIGH after readout

paul.k — Wed, 04 Apr 2018 09:47:31 GMT

Thank you for your fast answer.

I tried to clock out further messages, but there comes nothing from the nRF, no matter how many bytes i try to get.

RE: nRF8001 - RDYN pin not going HIGH after readout

David Edwin — Wed, 04 Apr 2018 08:52:23 GMT

If the RDYN line is low, that means data is available in the nRF8001 and should be clocked out. Continue to clock out the ACI so all the data is clocked out. After each ACI message is clocked out you must set the REQN high. Look at section 7 in the nRF8001 Product specifications for details on handling the ACI lines. Example code for handling the ACI interface is present in ble-sdk-arduino project . The https://github.com/NordicSemiconductor/ble-sdk-arduino/tree/master/documentation/libraries/BLE (library architecture document) explains more about handling the ACI interrface.