Dual-wire data transmission method and device thereof

Abstract

The embodiment of the invention provides a dual-wire data transmission method which comprises the following steps: when an excitation signal of a clock enters a data transmission device, the data transmission device starts counting, receives an input data signal and drives an LED lamp for display control according to the data signal; and when the counting value of the data transmission device reaches a preset threshold value, the data transmission device outputs the input clock signal and the data signal. The embodiment of the invention further provides the dual-wire data transmission device.Relative to the existing dual-wire transport protocol by the mode of slaves in series, the technical scheme provided by the invention has higher data updating rate without sending and displaying irrelevant data. In addition, the technical scheme provided by the invention is simple and efficient and has high practical value.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular, the present invention relates to a method and device for two-wire data transmission. Background technique [0002] In order to make display application materials such as LEDs display different brightness and obtain rich and constantly changing colors, it is necessary to control the display brightness of LED lights. Brightness control is usually realized by writing data to the LED driving device. The traditional data transmission, widely known, has the following categories: MAXIM single-wire protocol, DMX512 single-wire protocol, IIC two-wire protocol, SMBUS two-wire protocol, three-wire protocol used in the display screen, etc. [0003] In the single-wire protocol, only one line is needed for data transmission, which saves costs, but its inherent disadvantage is that its transmission rate is low, and the highest can only reach 800KHz. Even the newly developed single-wi...

AI Technical Summary

Problems solved by technology

But this method has the following disadvantages: 1. It is necessary to set different addresses (ID) for each slave, and the address needs to be preserved after power failure, which requires non-volatile storage media such as EPROM

In this way, in addition to receiving the required data, each slave needs additional indicator bits, which increases the number of data transmissions and reduces the data refresh rate.

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