how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Mon, 31 Aug 2015 10:13:14 GMT

your description is very generic without specifics. The peripheral either accepts connection request from all or from the whitelists. I am not sure if this is what you asked.

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Fri, 28 Aug 2015 07:23:26 GMT

Also Aryan , How a peripheral device is supposed to know that a connection request is received from Central device, is there any event in this current example ??

I'm still struggling with uncertainty if connection with central device, sometimes after connecting it goes into state where it doesn't even go into main loop of the main file and just receives the interrupts (have seen debug prints of Gpio interrupt handler and timer interrupt handler). Do yo have any idea about this issue ? Sometimes it comes out of the that state when Central App is terminated forcefully and even sometimes that also doesn't work. Thanks

Brajesh

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Fri, 28 Aug 2015 07:19:47 GMT

yes those are different I have take ble_app_uart for base reference of peripheral device and to do notification to Central device.

Thanks Brajesh

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Thu, 27 Aug 2015 11:06:22 GMT

i have compared your main file with the main file of ble_app_uart that came with SDK5.2 (i cannot find SDK5.0) and they look very different.

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Wed, 26 Aug 2015 13:18:44 GMT

Yes it is but it seems to work well when i take up basic ble_app_uart code, but after adding so few complicaitons as i attached in file, it starts behaving like that with Central App device.

HW version is QFACA1

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Wed, 26 Aug 2015 12:21:31 GMT

it is very old SDK, and HW version looks some thing like this QFAA-A1 (or similar) you should be able to read this on the nordic chip on the board. The square black IC which has its hw version inprinted on it. Its little hard to read as it is just scratch print but you can give it a try.

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Wed, 26 Aug 2015 12:09:21 GMT

SDK_5.0 & Softdevice 6.0 and HW- nRF51822

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Wed, 26 Aug 2015 07:13:09 GMT

Can you please tell me which SDK and which hardware versions you used?

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Wed, 26 Aug 2015 06:08:32 GMT

Hi Aryan, I have added my main.c file of my firmware. Please have a look at it.

Now the connection latency or connection rejection issue is coming more frequently and it is making look device really odd. and hangs the device badly.

Untill i switch off the bluetooth of Central device, the ble_app_uart doesn't start advertising again.

Can you please have a look at the attached file in my Question above and let me know where is the issue ?

Your suggestions are needed.

Thanks

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Tue, 25 Aug 2015 12:23:15 GMT

NVIC_systemReset is a CMSIS function, i do not see any dependency on it with the softdevice. How did you test it with and without softdevice? what is the context when you are resetting?

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Tue, 25 Aug 2015 10:41:03 GMT

yes, I'v tried NVIC_systemReset with Softdevice also but that doesn't work. NVIC works only without Softdevice.

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Tue, 25 Aug 2015 09:37:00 GMT

the prefix "sd_" means that it only works with softdevice enabled. I personally think that you can use NVIC function as you are anyway resetting the system, so why bother about the softdevice state (make sure your app is not writing anything to flash at that time if you are using direct NVIC_SystemReset function).

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Brajesh — Tue, 25 Aug 2015 09:20:36 GMT

Thanks Aryan for the reply.

But sd_nvic_SystemReset API doesn't work with softdevice, though NVIC_SystemReset works without Stack...

RE: how to Soft reset nRF51822 using Softdevice?? & connection setup latency.

Susheel Nuguru — Tue, 25 Aug 2015 07:35:26 GMT

for your first question, you need to give more information on what changes you made to the example provided in the SDK. What is it connecting to? what are the intervals used? if possible provide the code.
nrf_soc.h

/**@brief System Reset.

@note Corresponds to NVIC_SystemReset in CMSIS.
@retval ::NRF_ERROR_SOC_NVIC_SHOULD_NOT_RETURN */ SVCALL(SD_NVIC_SYSTEMRESET, uint32_t, sd_nvic_SystemReset(void));

UPDATE:

Tried to explain little more here