基于STM32F103的手写绘图板设计

Design of handwritten drawing board based on the STM32F103

本设计采用铜板电阻分压电路,基于AD7982的AD转换模块、STM32F103的主控制模块和LCD12864的液晶显示模块设计了一种手写绘图板.通过查找铜板电阻-电压变化关系的数据表,进行软件编程和优化,实现了表笔触动15 cm×10 cm覆铜板时,在液晶屏上显示触点坐标及象限功能、文字显示和表笔轨迹追踪、显示功能.本设计精度高、功耗低,是一种较理想的设计方案.

A bleeder circuit of copper plate resistance is used to design a drawing board, in which the AD conversion module is based on AD7982, the master control module is based on the STM32F103, and the liquid crystal display module is based on LCD12864. By searching the linear data sheet which records the change of copper plate resistance-voltage ,the drawing board can display the coordinates and quadrant of the contact,the text and the track of the pen on the LCD screen when the pen touches on the 15 cm × 10 cm copper plate. This design is an ideal solution because of its high precision and low power consumption.