nRF51 DK won't connect with nRF Toolbox

RE: nRF51 DK won't connect with nRF Toolbox

FormerMember — Wed, 22 Mar 2017 10:29:13 GMT

Okay, I see.

Yes, whether or not the nRF51822-QFAB has sufficient RAM depends on the application. When I compile ble_app_uart in SDK 12.2.0, it uses 4.34 kB RAM.

The minimum required RAM by S130 v.2.0.1 is 4.95 kB, and the ble_app_uart example in the SDK doesn't need to use more than 4.96 kB. So the ble_app_uart will fit in the QFAB version.

(Total flash: 108 kB (softdevice) + 13.23 kB = 121.23 kB)

RE: nRF51 DK won't connect with nRF Toolbox

PB — Tue, 21 Mar 2017 21:05:15 GMT

Hi Kristin,

Thank you for your reply. I've tested today with one of custom boards I've made with nRF51822 and the samples work ok, so most definitely it is something wrong with my DK (which is possible as it's suffered gont through a lot).

With my question I also wanted to rule out the possibility that nRF51822 could potentially have not sufficient amount of RAM to handle a BLE connection. If I understand this correctly, that would be the case for AB variant with 16KB RAM, is that right? I can't seem to fit the app_ble_uart example even after modifying .ld file to correct values for AB variant.

RE: nRF51 DK won't connect with nRF Toolbox

FormerMember — Tue, 21 Mar 2017 10:10:25 GMT

My first thought is that the chip is not damaged. There is a risk of ESD damage, but that doesn't happen very often.

If you test one of our examples, place a breakpoint in the error handler, and run the chip in debug mode? Will the error handler be "called"?