ble hangs when UART initialized

RE: ble hangs when UART initialized

Melfice — Fri, 14 Jul 2017 10:41:18 GMT

Please check if your code has run the log_init(). Also, in your sdk_config.h file, Check if NRF_LOG_DEFERRED and NRF_LOG_DEFAULT_LEVEL is set. They should be set to 0. The ANCS sample include LOG function and it will use UART, it initialize UART once. Then, in your code, you initialize UART again. This will cause problem. Just some suggestions for your reference.

RE: ble hangs when UART initialized

Shreyas Shivalkar — Mon, 10 Jul 2017 21:36:38 GMT

I am using nRF52832 (nRF52 dev board). Without the boot-loader as well the application crashes and 'Default Handler' is called.

Is there a way, you guys can review my code(project) to see what is going on.

RE: ble hangs when UART initialized

FormerMember — Thu, 29 Jun 2017 14:59:31 GMT

That looks okay, assuming you are using nRF52832?

What happens if you run the application without the bootloader?

RE: ble hangs when UART initialized

Shreyas Shivalkar — Tue, 27 Jun 2017 20:03:19 GMT

Flash/RAM settings according to map file are as follows

Total RO  Size (Code + RO Data)                53724 (  52.46kB)
Total RW  Size (RW Data + ZI Data)             11688 (  11.41kB)
Total ROM Size (Code + RO Data + RW Data)      53800 (  52.54kB)

RE: ble hangs when UART initialized

FormerMember — Tue, 27 Jun 2017 09:25:30 GMT

What are your flash/RAM settings? And how much flash/RAM is being used, according to the .map file?

RE: ble hangs when UART initialized

Shreyas Shivalkar — Mon, 26 Jun 2017 19:42:24 GMT

No Luck yet. The application crashes and 'Default Handler' is called. I am trying to figure out why and where 'Default Handler' is called from.

RE: ble hangs when UART initialized

FormerMember — Mon, 26 Jun 2017 13:11:43 GMT

Is the problem solved?

RE: ble hangs when UART initialized

Shreyas Shivalkar — Fri, 23 Jun 2017 22:28:16 GMT

I was not sure how NRF_LOG was setup because somebody else did it, so I have disabled the NRF_LOG completely and commented out NRF_LOG statements. Still Uart neither sends any data nor generates any error. But the application goes into default handler.

Edit: After lot of debugging, I also found out that application crashed and device went into boot-loader mode.

RE: ble hangs when UART initialized

FormerMember — Thu, 22 Jun 2017 06:23:51 GMT

Do you have set up NRF_LOG to use UART or RTT. If NRF_LOG uses UART and you also use UART separately, there will be problems.

If you use UART separately, NRF_LOG will have to use RTT-

RE: ble hangs when UART initialized

Shreyas Shivalkar — Wed, 21 Jun 2017 21:07:10 GMT

I have a ext 32KHz crystal on my board(Came with nRF52 module). Per your suggestions I reorganized my code.

APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, NULL);
uart_debug_init();
err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
ble_stack_init();

Uart initialization and Services initialization was successful. But the application went into Default Handler when I tried to send data on UART.

while(app_uart_put(ble_tgl_status) != NRF_SUCCESS);

RE: ble hangs when UART initialized

FormerMember — Tue, 20 Jun 2017 13:09:21 GMT

Do I understand you correctly that the exact code does work on the nRF52-DK, but not on your custom board? If so, remember that the examples in the SDK by default use external 32 kHz crystal.

When your board fails, if you run the chip in debug mode, where does it fail'?

RE: ble hangs when UART initialized

Shreyas Shivalkar — Mon, 19 Jun 2017 19:50:20 GMT

I tried the method you suggested. But the application still got stuck.

Uart initialization was successful. But services initialization failed.

RE: ble hangs when UART initialized

FormerMember — Fri, 16 Jun 2017 07:27:06 GMT

Could you do UART initialization before softdevice initialization (ble_stack_init() ) and check if that changes anything?

RE: ble hangs when UART initialized

Shreyas Shivalkar — Thu, 15 Jun 2017 21:52:11 GMT

ble_device_info_service_ins is the name of my SOC. It works fine when UART code is commented out.

In case of debugging, it breaks on

memset(&ble_device_info_service_ins, 0, sizeof(ble_device_info_service_ins));

but kind of hangs at

ble_device_info_service_ins.conn_handle = BLE_CONN_HANDLE_INVALID;

Any thoughts?

RE: ble hangs when UART initialized

RK — Thu, 15 Jun 2017 02:44:03 GMT

I reformatted your code for you - you have to leave a blank line between text and code. What's &ble_device_info_service_ins? If it's an invalid memory location you're getting a hardfault or memory fault.

MCUs don't hang. They don't just stop working, the are in a handler, a fault handler or something. All you have to do is hit the 'break' button on your debugger and you'll see where it is.

RE: ble hangs when UART initialized

Shreyas Shivalkar — Thu, 15 Jun 2017 01:43:06 GMT

I have checked the error code. It is 0x00 i.e. NRF_SUCCESS.

in my service initialization code, code hangs at memset

uint32_t err_code;
ble_uuid_t service_uuid;
ble_uuid128_t base_uuid = RP_BASE_UUID;

service_uuid.uuid = BLE_UUID_RP_DEVICE_INFO_SERVICE;
err_code = sd_ble_uuid_vs_add(&base_uuid, &service_uuid.type);
APP_ERROR_CHECK(err_code);

// Initialize service structure
memset(&ble_device_info_service_ins, 0, sizeof(ble_device_info_service_ins));
ble_device_info_service_ins.conn_handle = BLE_CONN_HANDLE_INVALID;

Let me know if you have any insights.

RE: ble hangs when UART initialized

RK — Thu, 15 Jun 2017 01:31:07 GMT

What does this

APP_ERROR_CHECK(err_code);

line of code do? If you have an error then the application isn't 'hanging' it's going to your error handler.