State display device and display method of state display device

摘要

A state display device capable of reducing a processing load applied to a microcomputer by performing part of a GUI process by hardware and a display method of the state display device are obtained. A rendering processing device starts a process in response to a rendering request stored in a rendering request region when a starting command is stored in a start/end instruction register. When a rendering request specified by an instruction address is a rendering termination request, the rendering processing means terminates the process performed in response to the rendering request, stores a termination factor in an interruption factor register, and issues an interruption to a central processing device.

主权项

1. A state display device comprising:
a liquid crystal display unit; a rendering processing unit which performs rendering calculation required for said liquid crystal display unit to display a screen; a central processing unit which generates a rendering request which causes said rendering processing unit to perform rendering calculation; and a storage unit which data can be read from or written to by said rendering processing unit and said central processing unit, wherein said rendering request includes a rendering range to be displayed in said liquid crystal display unit, said central processing unit stores said rendering request in said storage unit, said storage unit stores image data, said rendering processing unit
includes a register which stores an address in which said rendering request is stored in said storage unit,obtains said rendering request stored in said address kept in said register from said storage unit,performs the rendering calculation in response to said rendering request to store rendering data required for said liquid crystal display unit to display a screen, said rendering calculation includes
calculating a surplus Mod(X) by dividing each display coordinate in said liquid crystal display unit which is represented by said rendering range by a width of said image data, andgenerating said rendering data of the shifting of pixel data of said image data rightward by said surplus Mod(X), and said liquid crystal display unit performs screen display based on said rendering data stored in said storage unit.