In order to realize the sampling data display

a display platform consisting of STM32F103VET6 and 11 cm(4.3 in) TFT LCD module is established. For the problem of intersections between dynamic waveform and coordinate grid filled with background color

this paper propose a method of intersection identification

intersection filled with the grid color

non-intersection filled with the background color. By the practical application in the cable parameters acquisition and control system

it shows that the method can solves the problem of the grid being filled

but also avoid the flicker waveform

it has good usability

meets the requirement of real-time waveform display.