"Undefined Symbol" error when compiling , nrf51822 SDK12.3.0

Question

Hi, I encountered the following error in keil v5.12.0.0: 
 
 linking... .\_build
rf51422_xxac.axf: Error: L6218E: Undefined symbol nrf_drv_gpiote_in_event_enable (referred from main.o). .\_build
rf51422_xxac.axf: Error: L6218E: Undefined symbol nrf_drv_gpiote_in_init (referred from main.o). .\_build
rf51422_xxac.axf: Error: L6218E: Undefined symbol nrf_drv_gpiote_init (referred from main.o). Not enough information to list image symbols. Finished: 1 information, 0 warning and 3 error messages. ".\_build
rf51422_xxac.axf" - 3 Error(s), 2 Warning(s). 
 I have included nrf_drv_gpiote.h 
 I added nrf_drv_gpiote.c 
 
 however I did not define anything relevant to use the GPIOTE, I don't know what they are, and I don't know where to find them. I know there is some config file in nrf52 sdk, but not the case with nrf51 sdk 12. 
 
 Can you make a list of possibilities regarding where I could have overlooked? For example missing marco definition etc.

MartinBL · Accepted Answer

Hi,

You might have forgotten to enable GPIOTE in your sdk_config.h file. Make sure to define GPIOTE_ENABLED as 1. It could be that your sdk_config.h file lacks all GPIOTE relevant defines though, in that case please try to copy paste and add this:

//==========================================================
// <e> GPIOTE_ENABLED - nrf_drv_gpiote - GPIOTE peripheral driver
//==========================================================
#ifndef GPIOTE_ENABLED
#define GPIOTE_ENABLED 1
#endif
#if  GPIOTE_ENABLED
// <o> GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS - Number of lower power input pins 
#ifndef GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS
#define GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 1
#endif

// <o> GPIOTE_CONFIG_IRQ_PRIORITY  - Interrupt priority
 

// <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 

#ifndef GPIOTE_CONFIG_IRQ_PRIORITY
#define GPIOTE_CONFIG_IRQ_PRIORITY 3
#endif

// <e> GPIOTE_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef GPIOTE_CONFIG_LOG_ENABLED
#define GPIOTE_CONFIG_LOG_ENABLED 0
#endif
#if  GPIOTE_CONFIG_LOG_ENABLED
// <o> GPIOTE_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef GPIOTE_CONFIG_LOG_LEVEL
#define GPIOTE_CONFIG_LOG_LEVEL 3
#endif

// <o> GPIOTE_CONFIG_INFO_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef GPIOTE_CONFIG_INFO_COLOR
#define GPIOTE_CONFIG_INFO_COLOR 0
#endif

// <o> GPIOTE_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef GPIOTE_CONFIG_DEBUG_COLOR
#define GPIOTE_CONFIG_DEBUG_COLOR 0
#endif

#endif //GPIOTE_CONFIG_LOG_ENABLED
// </e>

#endif //GPIOTE_ENABLED
// </e>

"Undefined Symbol" error when compiling , nrf51822 SDK12.3.0

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