  Atom interferometers require precise control of digital, analog, and radio
frequency signals for effective operation. In this paper, we propose and
implement a control system for mobile atom interferometers. The system consists
of a microcontroller and peripherals to synthesize radio frequency signals and
to read or write analog signals. We use the system to operate a mobile atomic
gravimeter by controlling 7 analog outputs, 16 digital outputs, 2 radio
frequency channels, and 1 analog input. Our control system eliminates dead time
between repetitions of the measurement and, consequently, improves the sampling
rate of our atomic gravimeter by more than a factor of 2 and the sensitivity by
more than a factor of $\sqrt{2}$ compared to the system based on a desktop
computer.
