Method and device for producing universal infrared carrier signal
A technology of a carrier signal and a generating device, applied in the field of infrared communication, can solve the problems of increasing the system cost and the influence of the MCU load, and achieve the effect of reducing the cost and eliminating the application-specific integrated circuit chip.
Active Publication Date: 2013-09-25
TELINK SEMICON SHANGHAI
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Problems solved by technology
In the traditional technical solution, the infrared carrier signal is generally generated by a dedicated infrared encoding chip. Although this method does not need to occupy MCU resources, it will increase the system cost virtually due to the need to use an application-specific integrated circuit chip; in the microcontroller MCU, also GPIO can be controlled by pure software method to generate infrared carrier signal, but this method will have a greater impact on the MCU load, especially for embedded systems
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[0028] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.
[0029] The first embodiment of the present invention relates to a method for generating a general-purpose infrared carrier signal, which utilizes the I 2 The C bus interface generates an infrared carrier signal, thereby saving the ASIC chip in the traditional solution and reducing the cost. The specific process is as figur...
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The invention relates to the field of infrared communication and discloses a method and a device for producing a universal infrared carrier signal. The method comprises the following steps of connecting an infrared-emitting diode and an emitting circuit of the infrared-emitting diode to an I2C bus interface of a microprocessor, determining working frequency of the I2C bus interface according to frequency and a duty ratio of a needed infrared carrier signal, carrying out allocation of control information of an I2C module by the microprocessor according to the working frequency of the I2C bus interface, transmitting a data signal and an answering signal to the I2C bus interface according to the control information, producing an infrared carrier control signal, powering on or cutting off the emitting circuit under the action of the infrared carrier control signal, driving the infrared-emitting diode to emit light or to be extinguished, and transmitting the infrared carrier signal subjected to binary pulse information code modulation by infrared light. According to the method, the infrared carrier signal is produced by the bus interface of the microprocessor so that a specialized integrated circuit chip is avoided and thus a cost is reduced.
Description
technical field [0001] The invention relates to the field of infrared communication, in particular to a method and device for generating a general infrared carrier signal. Background technique [0002] As a wireless, non-contact control technology and a widely used protocol, infrared remote control is widely used in household appliances and industrial control due to its remarkable advantages such as strong anti-interference ability, reliable information transmission, low power consumption, low cost, easy implementation, and mature solutions. Widely used in the field of intelligent control. For a long time in the future, infrared remote control will still occupy a place in the field of remote control technology. [0003] The infrared remote control signal is a series of binary pulse codes. In order to avoid the interference of other infrared signals during wireless transmission, it is usually first modulated on a specific carrier frequency, and then transmitted through the i...
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IPC IPC(8): G08C23/04
Inventor 盛文军王广桑永峰张玉忠江晨郑明剑王波
Owner TELINK SEMICON SHANGHAI