Abstract: The China Spallation Neutron Source (CSNS) Rapid Cycling Synchrotron (RCS) is a high beam power proton accelerator, and the BUMP power supply is the important equipment of injection system. According to the demand of building CSNS, the BUMP power supply control prototype needs to be developed in advance. The BUMP power supply is controlled through YOKOGAWA WE7000 measurement system, which consists of a function generator for arbitrary waveform output and a digitizer for data acquisition. This paper describes the development of the WE7000 EPICS driver and its application to the BUMP power supply control prototype. The testing results show that the control prototype works well with the BUMP power supply.