BLE/WPAN : Device not visible when disabling debug traces in CubeMX

[GuilhemG]

Hi guys,

I'm working on a pretty simple cable replacement client/server program to exchange data form one device to another.

When I enable traces in CubeMX for the WPAN/BLE part, my STM32WB5 is visible (I can see it from my phone or using a Nordic USB Dongle, connect to it and exchange data). All traces go to USART1.

Then, since everything works, I disable traces (CFG_HW_USART1_ENABLED to Disabled, CFG_DEBUG_* to Disabled, BLE_DBG_APP_EN to Disabled, etc.). At this point, I can't see anymore my device in the phone list even tough aci_gap_set_discoverable returns 0.

I don’t understand how disabling traces can prevent the rest of the BLE stack from running.

Any help on this would be appreciated.

Thx !

[STTwo-32]

Hello @GuilhemG 

Without CFG_DEBUGGER_SUPPORTED, CFG_DEBUG_BLE_TRACE and CFG_DEBUG_APP_TRACE defines, the UART is not configured, then each access to the UART for any printf or traces are forbidden to do not generate some hardfault. CFG_DEBUG_BLE_TRACE and CFG_DEBUG_APP_TRACE defines can be disabled with the CFG_DEBUGGER_SUPPORTED define enabled. CFG_DEBUG_BLE_TRACE and CFG_DEBUG_APP_TRACE defines cannot be enabled without the CFG_DEBUGGER_SUPPORTED define enabled. This is managed with the following lines of the app_conf.h file:

#if ( (CFG_DEBUG_BLE_TRACE != 0) || (CFG_DEBUG_APP_TRACE != 0) ) 
#define CFG_DEBUG_TRACE 1 
#endif 

#if (CFG_DEBUG_TRACE != 0) 
#undef CFG_LPM_SUPPORTED 
#undef CFG_DEBUGGER_SUPPORTED 
#define CFG_LPM_SUPPORTED 0 
#define CFG_DEBUGGER_SUPPORTED 1 
#endif

 

Best Regards.

STTwo-32