"No JLink Device found" nRF51 uVision 5.13

I cannot get uVision to recognize the J-Link OB device on my nRF51 Eval board. uVision DOES work with a different J-Link OB eval board targeting the same device, the Rigado BMD-200. Both work with the...
"No JLink Device found" nRF51 uVision 5.13

I cannot get uVision to recognize the J-Link OB device on my nRF51 Eval board. uVision DOES work with a different J-Link OB eval board targeting the same device, the Rigado BMD-200. Both work with the...
nRF51 Error: L6218E: Undefined symbol (referred from main.o)

Hello! I am having these errors when compiling and I have no idea on how to fix them: \nrf51422_xxac.axf: Error: L6218E: Undefined symbol custom_service_init (referred from main.o). \nrf51422_xxac...
nRF51 Error: L6218E: Undefined symbol (referred from main.o)

Hello! I am having these errors when compiling and I have no idea on how to fix them: \nrf51422_xxac.axf: Error: L6218E: Undefined symbol custom_service_init (referred from main.o). \nrf51422_xxac...
ARM Cortex A8 - if IRQ interrupts are disabled in CPSR register While the processor is executing, system results in data abort. What might be the reason to trigger data abort

ARM Cortex A8 - if IRQ interrupts are disabled in CPSR register While the processor is executing, system results in data abort. What might be the reason to trigger data abort cpsid i; // instruction...