S110 Soft Device and wired UART

RE: S110 Soft Device and wired UART

Hung Bui — Tue, 01 Apr 2014 09:37:12 GMT

Jarmo, please have a look at buttons_init() function in main.c An interrupt from the button (GPIOTE PORT interrupt) will wake the system up.

RE: S110 Soft Device and wired UART

Jarmo — Tue, 01 Apr 2014 07:58:33 GMT

Ok, that explains the thing, thanks for answer. What is the way to get the system wake up again?

RE: S110 Soft Device and wired UART

Hung Bui — Mon, 31 Mar 2014 13:23:54 GMT

Jarmo, the HRM example will automatically enter deep sleep mode after advertising 3 minutes ( APP_ADV_TIMEOUT_IN_SECONDS) without a connect request from a master. You can wake the chip up by pressing a button on the board.

RE: S110 Soft Device and wired UART

Jarmo — Mon, 31 Mar 2014 10:28:12 GMT

I just tried with pca10001\s110\ble_app_hrs stock example. It seems to work as long as I connect my Mac with LightBlue relatively soon after starting the ble_app_hrs. However, if I leave the example running without connecting (LightBlue not running on Mac), after a few minutes my Mac is no more able to find the Nordic_HRM profile or anything. Looks like the app has crashed or something, don't know what.

So I would say yes, similar issue is happening also with stock SDK example.

RE: S110 Soft Device and wired UART

Hung Bui — Fri, 28 Mar 2014 15:28:58 GMT

Hi Jarmo,

Stepping code line by line would not work if the stack is active, since the stack is not paused by the debugger. What you should do is to add a breakpoint inside app_error_handler() to check if there is any assertion, and then look for the err_code, line number and file name of the function that cause the issue.

Do you have the same issue with the stock SDK's example ?

RE: S110 Soft Device and wired UART

Jarmo — Fri, 28 Mar 2014 14:45:46 GMT

Now it looks like the problem is not UART related, because it happens also without that. System just runs bout three minutes and then crashes. I have to set up debugging environment and strip out code that actually causes the problem. However, I haven't got uVision debugging working very well. Stepping code line by line does not work for me.

RE: S110 Soft Device and wired UART

Hung Bui — Thu, 27 Mar 2014 16:07:38 GMT

Hi Jarmo,

Using simple_uart should not break the BLE link.

I assume you are aware of the interrupt latency caused by BLE stack (CPU blocking time) that can affect the UART communication.

Could you run on Debug mode and catch the BLE_GAP_EVT_DISCONNECTED event then look for the disconnect reason in ble_gap_evt_t ?

If possible please send us your project for closer look.