Device and method for driving LEDs and acquiring key information
A technology of LED driving and keys, applied in lighting devices, electric lamp circuit layout, input/output of user/computer interaction, etc., can solve the problem of too many input/output ports of microcontroller and insufficient allocation of input/output ports of microcontroller , Insufficient input/output ports, etc.
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[0027] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] Such as figure 1 As shown, in the first embodiment of the device and method for driving LEDs and obtaining key information according to the present invention, the device includes a central controller (not shown in the figure), and the central controller includes a plurality of input / output ports ( I / O port), a plurality of LEDs and buttons connected to the input / output port, the input / output port includes a dynamic input / output port ( figure 1 Terminal 3 and Terminal 4) and general-purpose input / output ports ( figure 1 terminal 1, terminal 2 and terminal 5), the buttons are respectively connected between the dynamic input / output port and the general input / output port through serial resistors with different resistance values, and the LED is connected to the dynamic input Between the / output port and the general-purpose input / output port; the dyna...
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