Angel is a debug monitor that enables rapid development and debugging of applications running on ARM-based hardware. Angel can debug applications running in either ARM state or Thumb state on target hardware. It runs alongside the application being debugged on the target platform.

Angel also enables the embedded microprocessor to access services of the host system, such as screen display, keyboard input, and disk drive storage, using semihosting.

You can use Angel to debug an application on an ARM Development Board or on your own custom hardware. See the RealView ARMulator ISS Guide for more information.