DBG

Detailed Description

Debug (DBG) Peripheral API.

This module contains functions to control the DBG peripheral of Silicon Labs 32-bit MCUs and SoCs. The Debug Interface is used to program and debug Silicon Labs devices.

Functions
__STATIC_INLINE bool	DBG_Connected (void)
	Check if a debugger is connected (and debug session activated) More...
void	DBG_SWOEnable (unsigned int location)
	Enable Serial Wire Output (SWO) pin. More...

Function Documentation

__STATIC_INLINE bool DBG_Connected

(

void

)

Check if a debugger is connected (and debug session activated)

Used to make run-time decisions depending on whether a debug session has been active since last reset, ie using a debug probe or similar. In some cases special handling is required in that scenario.

Returns

true if a debug session is active since last reset, otherwise false.

Definition at line 73 of file em_dbg.h.

void DBG_SWOEnable

(

unsigned int

location

)

Enable Serial Wire Output (SWO) pin.

The SWO pin (sometimes denoted SWV, serial wire viewer) allows for miscellaneous output to be passed from the Cortex-M3 debug trace module to an external debug probe. By default, the debug trace module and pin output may be disabled.

Since the SWO pin is only useful when using a debugger, a suggested use of this function during startup may be:

* if (DBG_Connected())
* {
* DBG_SWOEnable(1);
* }
* 

By checking if debugger is attached, some setup leading to higher energy consumption when debugger is attached, can be avoided when not using a debugger.

Another alternative may be to set the debugger tool chain to configure the required setup (similar to the content of this function) by some sort of toolchain scripting during its attach/reset procedure. In that case, the above suggested code for enabling the SWO pin is not required in the application.

Parameters

[in]

location

Pin location used for SWO pin on the application in use.

Definition at line 92 of file em_dbg.c.

References CMU_OscillatorEnable(), cmuOsc_AUXHFRCO, GPIO_DbgLocationSet(), GPIO_DbgSWOEnable(), GPIO_PinModeSet(), and gpioModePushPull.