I have a custom board with an iMXRT1064. I'm using the LPC-Link2 to debug over the SWD port, I'm able to successfully run the debugger, step through the program, etc with MCUExpresso. However, if I run debugger long enough, it loses the connection to the MCU. Here is my test code:
int main(void) {
customInit();
int loop=0;
while(true) {
int result = doSomething();
printf("Got result of %d on loop %d\r\n",result,loop);
toggleLED();
loop++;
}
}
Sometimes my loop runs for tens of thousands on iterations. But eventually my program and my debugging connection crash. The LED does not toggle, I no longer get print lines to the console and in MCUExpresso, when I try to pause or stop the debugging, these errors pop up:
Failed to execute MI command:
-interpretor-exec console kill
Error message from debugger back end:
Can't kill process
and
Target reported errors (click 'cancel' to terminal session)
Reason:
19: Could not stop execution from running
Wire ACK Fault in DAP access
Debugging context: test_code LinkServer Debug
If I run the program without debugging (just reboot since debugger writes to the flash), the program never crashes and the LED always toggles. Sometimes restarting MCUExpresso and disconnecting and reconnecting the LPC-Link2 seems to help get the code to run longer, and some tweaks to the code in doSomething() seems to make the crashes more or less frequent, but whenever I narrow in on something, it changes.
What could be going on and how I can troubleshoot and fix this?
