Probina Questions

摘要

My first job after college was working for a major HVAC (heating/ventilation/air-conditioning) manufacturer. The company was developing a new home-heat-pump'controller design using a microcontroller, and a number of prototype units were already available for development when I came onboard. The company had hired a consultant, who taught microprocessor programming at a local college, to write just enough software to get the processor off the ground. I began by writing some preliminary software to exercise the digital I/O, which contained a number of output relays.