tools/validation/startupdelay/abstract.txt

   1 This simple code can be used to test the startup delay, or more precisely
   2 the delay between the moment that reset is deasserted and code execution
   3 begins in main().
   4
   5 GPIO pin 2.1 is set to output and high as soon as main is entered, so you
   6 simply need to monitor the reset line and GPIO 2.1 on a two-channel
   7 oscilliloscope, and measure the delay between the two rising edges.