Lights of dead
LPC1768, LPC11U24 and FRDM-KL25Z showing their distinctive lights of dead pattern
When your development board shows the “lights of dead” it means the board ran into a runtime error. Runtime errors occur when code is correct but tries to do something that is invalid, or when malfunctioning hardware cannot be accessed.
A typical example is assigning the wrong function to a pin. For example, switching the
SCK pins when accessing I2C or trying to use
PwmOut on a pin that does not support pulse-width modulation.