Utveckling av programvara till ett inbyggt styrsystem
This thesis considers the development of the software for an, newly developed, embedded real-time control system, based on a Periferal Interface Controller (PIC). The control system is developed to be used for several different applications. In this thesis work, software for two different applications are developed. The first task is a time controlled system, while the other task is implementation of aPI-/PID-controller. A user interface is also developed and implemented.The time controlled system is an automatic horse feeder, which is used for feeding horses at certain predefined points in time. A barrier, which control when the horses are to be fed, is controlled by an electrical motor. The control signal from the control system is a digital signal, which allows the electrical motor to open the barrier and feed the horses. When this is done, the barrier closes and the system waits for the next point in time when the horses are to be fed.The PI-/PID-controller is to be used for positioning of proportional valves. The application for the positioning system is to control hydraulic systems, e.g. cranes on mobile units.The user interface consists of a keyboard, an LCD-display and a user menu. Different user menus are developed for the different applications. In the horse feeder system the user interface allows the supervisor to change the points in time when to feed the horses and in the PI-/PID-controller system the user interface allows the supervisor to change the regulator parameters.The software for the time controlled application is tested for a real horse feeder system which, together with the developed software, has a planned production start in spring 2005. To test the PI-/PID-controller an alternate test system is used, due to problems with the proportional valves. The test system is based on an electrical motor. The task in this test system is to control the motor axis angle with the PI-/PID-controller.