Design of LCD-HS12232 dot-matrix LCM based on DSP-TMS320F2812 and its application interface are introduced. The design method of hardware interface and software program are provided. Modular program design of showing section is proposed
and its application in device monitoring system is discussed. Specific issues of multi-task operating efficiency in the design process are solved. Structured design system has convenient user interfaces and can be transplanted to many DSP control and data handling system.