I’m trying to use the Segger debugger on an adafruit_feather_nrf52840 board under Platformio. I’m not sure if this and an Adafruit problem or a Platformio problem so I also posted it on the Adafruit forum.
Even in athe most trivial project the debugger repeatedly stops during initialization at NVIC_SetPriority and will not proceed beyond this point. This is my project:
#include <Arduino.h>
void setup()
{
Serial.println("setup test");
// put your setup code here, to run once:
}
void loop() {
// put your main code here, to run repeatedly:
Serial.println("loop test");
}
Platformio.ini:
[env:adafruit_feather_nrf52840]
platform = nordicnrf52
board = adafruit_feather_nrf52840
framework = arduino
To replicate the problem:
-
Click the “Run and Debug” button on the left in Platformio to enter the debugging panel.
-
Click the “Start Debugging” button at the top.
-
After a moment the program stops at main() in main.cpp:
// \brief Main entry point of Arduino application
int main( void ) -
Press F5 to continue. The program halts in core_cm4.h here:
__STATIC_INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority)
{
if ((int32_t)(IRQn) < 0)
{
SCB->SHP[(((uint32_t)(int32_t)IRQn) & 0xFUL)-4UL] = (uint8_t)((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL);
}
else
{
NVIC->IP[((uint32_t)(int32_t)IRQn)] = (uint8_t)((priority << (8U - __NVIC_PRIO_BITS)) & (uint32_t)0xFFUL); //Halts here
}
} -
Now every time F5 is pressed to continue the program halts in the same place.
-
It’s impossible to debug using the hardware debugger.
However if the program is started without the debugger it runs normally and prints its messages to the serial monitor.
I’m running on a Macbook pro 2015 with the the Feather board plugged into one USB port and the Segger debugger plugged into the other port.
How can I avoid the halting?
