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Capacitive touchpad method using MCU GPIO and signal processing
Capacitive touchpad method using MCU GPIO and signal processing
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机译:使用MCU GPIO和信号处理的电容式触摸板方法
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摘要
A microcontroller identifies a maximum x-axis charge time and a maximum y-axis charge time, along with x-axis sensor locations and y-axis that correspond to the maximum charge times (maximum charge time sensor locations). Next, the microcontroller identifies sensor locations that are adjacent to the maximum charge time sensor locations and computes adjacent charge time ratios based upon their corresponding charge times. In turn, the microcontroller uses the largest adjacent charge time ratios and the maximum charge time sensor locations to compute and map an x-axis position and a y-axis position of a user's contact location on a two-dimensional grid.
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