Device and method for driving LEDs and acquiring key information

Abstract

The invention relates to a device for driving LEDs and acquiring key information, which comprises a central controller; the central controller comprises a plurality of input / output ports, a plurality of LEDs and a plurality of keys; the input / output ports comprise dynamic input / output ports and universal input / output ports; the keys are respectively connected between the dynamic input / output ports and the universal input / output ports through series resistors with different resistances; the LEDs are connected between the dynamic input / output ports and the universal input / output ports; and the dynamic input / output ports are set to be analog and digit input ports when the device acquires the key information, and are set to be output ports when the device drives the LEDs. The invention also relates to a method for driving the LEDs and acquiring the key information. The device and the method for driving the LEDs and acquiring the key information have the advantages that more key information is acquired and more LEDs are driven through fewer ports.

Description

technical field [0001] The invention relates to the field of household appliances control, more specifically, to a device and method for driving LEDs and obtaining key information. Background technique [0002] Generally, in the control of household appliances, a large number of microcontrollers are used to control their functions and displays. These control circuits usually include buttons and LEDs (light emitting diodes) for displaying the working status of the household appliances. In the prior art, usually these light-emitting diodes are connected on the input / output ports of the microcontroller, and the keys are generally also respectively connected on the input / output ports of different microcontrollers or utilize multiple input / output ports to connect these The keys form a key matrix. However, these methods in the prior art have more input / output ports of the microcontroller, and more resources of the microcontroller. In the case where the input / output ports of the m...

AI Technical Summary

Problems solved by technology

However, these methods in the prior art have more input / output ports of the microcontroller, and more resources of the microcontroller. In the case where the input / output ports of the microcontroller are less or buttons and LEDs are more situation, it may cause insufficient allocation of input / output ports of the microcontroller

With the development of technology, many microcontrollers are now equipped with input / output ports with analog-to-digital conversion functions, which can be used to improve the existing technology. Causes problems with not enough input / output ports in microcontrollers

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