Journal of Jianghan University(Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (2): 19-21.

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Hardware Interface Circuit and Calibratance Algorithm for Resistance Touch Screen

TAN Cui-lan, HE Li-yan   

  1. School of Physics and Information Engineering, Jianghan University, Wuhan 430056, Hubei, China
  • Received:2011-01-16 Online:2011-03-20 Published:2013-12-30

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Abstract: Introduces the working principle of chip ADS7843 for touch screen′s control, gives the interface circuit of ADS7843 with MCU,presentes the coordinate transform and calibration algorithm for touch screen, and testifies the feasibility of algorithm by data.The circuit uses MSP430 series MCU to control a touch screen LCD with 800×480 pixels, which is manufactured by Wuhan Zhongxian Company,the test verifies the effect of the calibration algorithm in actual application.

Key words: touch screen, coordinate transform, calibration, ADS7843

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