一种基于FPGA的电容触摸控制系统的实现

Implementation of Capacitive Touch Control System Based on FPGA

通用电容触控芯片在温差范围大,电磁环境复杂的环境下使用,会存在误报点的问题,而且管脚数固定,灵活性差。采用FPGA为控制器,配合外围激励和采集电路,结合FPGA处理算法,实现了投射式互电容触摸屏的控制设计,通过测试验证,各项指标均满足使用要求。

When the general capacitance touch chip is used in the environment with large temperature difference range and complex electromagnetic environment,there will be the problem of false alarm point,and the number of pins is fixed and the flexibility is poor.Field programmable gate array(FPGA)is adopted as a controller,cooperating with the peripheral excitation and acquisition circuit,and combing the FPGA processing algorithm to realize the control design of the projection mutual capacitance touch screen.Through testing and verification,all indexes meet application requirements.