Long-distance infrared remote-controlled device and method used for embedded equipment

Abstract

The invention discloses long-distance infrared remote-controlled device and method used for embedded equipment, belonging to the technical field of electronic information. The device comprises an infrared remote-controlled signal emission device and an infrared remote-controlled signal receiving device. In the remote-controlled method, after adding a sync character in front of a binary encoding a button corresponds to, the infrared remote-controlled signal emission device converts the binary encoding into a high-low electric level combination corresponding to an infrared signal encoding mode; then a 38k sinusoidal wave modulates the binary encoding and an infrared emitting head sends out the modulated binary encoding; after receiving the signal modulated by the 38k sinusoidal wave, an integral infrared receiving head of the infrared remote-controlled signal receiving device converts the signal into a pulse signal consisting of a high-low electric level; the pulse signal is output to a GPIO lead foot of an embedded equipment through an output lead foot of the integral infrared receiving head; the pulse signal consisting of the high-low electric level triggers an interruption of the GPIO port; during interruption processing program, lasting times of a high electrical level and a low electrical level are calculated out through timing; thus decoding can be carried out, and the high-low electric signal is deciphered into binary data.

Description

technical field [0001] The invention relates to a remote infrared remote control device and method for embedded equipment, belonging to the technical field of electronic information. Background technique [0002] Today's long-range infrared remote control is widely used. The encoding method of general long-range infrared remote control usually adopts the standard NEC or RC5 standard, and the binary data and control characters are marked with the difference between the high and low level durations. The general infrared decoding algorithm is to determine the duration of the level by timing in the interrupt program, and then decode. However, due to the relatively low main frequency of embedded devices, when non-real-time operating systems such as linux are used, the interrupt response delay is even far greater than the level duration in standard infrared coding, making decoding impossible; in addition, embedded The specificity of the device interface also often makes it diffi...

AI Technical Summary

Problems solved by technology

However, due to the relatively low main frequency of embedded devices, when non-real-time operating systems such as linux are used, the interrupt response delay is even far greater than the level duration in standard infrared coding, making decoding impossible; in addition, embedded The specificity of the device interface also often makes it difficult for infrared receiving devices to be universal

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