Please refer to my previous thread, "Query about pin 0.14..."
Well, I found a brand new board (but from the same manufacturer) and tried a modified version of Blinky:
1. I blink 4 LEDs in succession, with the frequency increasing after each iteration in 10 steps, and then it repeats. Basically, 1>. I know the program is running and 2>. there isn't any problem of repetitive reset or 3>. of external interrupt.
2. My code does nothing to pin 0.14, so it is set to defaults, as a gpio, input direction.
3. I thought that by applying 5V to the pin something is going wrong, but now, I apply 3.3V and get the same problem!
I press the reset button and the program stops.
Now, I apply 3.3V to p0.14 and the program starts again...without pressing the reset button! On top of that, when I stop applying 3.3V to the pin and then start again, the program stops! And I can do this forever.
It seems to be a hardware problem, but can I be sure? It's a new board, but from the same manufacturer.