nrf51822QFAA DFU

RE: nrf51822QFAA DFU

bjorn-spockeli — Wed, 08 Feb 2017 11:36:01 GMT

No, you will not be able to fit the UUID of the DFU service and a 16 character name in the 31 byte payload of the Advertisement package.

RE: nrf51822QFAA DFU

wim — Wed, 08 Feb 2017 10:59:07 GMT

that makes sense, this was my thought as well; so I guess a 16 character name is not feasible

RE: nrf51822QFAA DFU

bjorn-spockeli — Tue, 07 Feb 2017 13:40:17 GMT

@wim: I think is because the advertisement packet is restricted to a payload 31 bytes. The packet already contains the 128bit(16bytes) UUID of the DFU service in additions to some additional bytes so if you set a very long device name, then you will exceed 31 bytes and ble_advdata_set() in dfu_transport_ble.c will return an error which in turn will cause a reset.

RE: nrf51822QFAA DFU

wim — Tue, 07 Feb 2017 10:55:02 GMT

to be honest, I never debugged the bootloader code, just compile and flash, so I am not really sure; what I do know is that it is probably not NRF_SUCCESS, as the reset is explained by the ERROR check; i just traced it down to the name length: if it is 8 or smaller, all is ok, if it is > 9, I get a reset;

RE: nrf51822QFAA DFU

bjorn-spockeli — Tue, 07 Feb 2017 10:24:59 GMT

Yes, that would explain why it did not run properly. Are you able to check if sd_ble_gap_device_name_set() returns NRF_SUCCESS or an error code?

RE: nrf51822QFAA DFU

wim — Tue, 07 Feb 2017 09:57:48 GMT

Hi Bjorn,

I found the issue - my code and memory configurations were ok, but in the JLINKExe command line options I used the wrong device type, so I guess it was written to the wrong position in flash or something; all seems to work now, except for 1 thing: if I set the device name in the DFU bootloader code (using the sd_ble_gap_device_name_set() function) to a string longer than 8 characters, the bootloader crashes; I have been looking for the root cause of that crash, but did not really find it yet; where does this limitation come from? because in my normal application, I use longer names without a problem, and wanted to use more or less the same name if possible

RE: nrf51822QFAA DFU

bjorn-spockeli — Mon, 06 Feb 2017 12:44:17 GMT

Can you post the IRAM1 and IRAM2 sizes and start addresses?