CN100362502C

CN100362502C - Radio transmission system of I2C bus data

Info

Publication number: CN100362502C
Application number: CNB2005100436149A
Authority: CN
Inventors: 邢胜春; 刘俊
Original assignee: Hisense Group Co Ltd; Qingdao Hisense Electronics Co Ltd
Current assignee: Hisense Group Co Ltd; Qingdao Hisense Electronics Co Ltd
Priority date: 2005-05-26
Filing date: 2005-05-26
Publication date: 2008-01-16
Anticipated expiration: 2025-05-26
Also published as: CN1694082A

Abstract

The present invention relates to a radio transmission system of I2C bus data. A transmitting end and a receiving end are respectively a built-in transmitting module and a built-in receiving module, wherein the transmitting module is connected with transmitting end devices, the receiving module, the receiving end devices and respective CPU. The transmitting end and the receiving end are both provided with four registers: an I2C_CC_SEND 255-byte write-only register for transmitting data, an I2C_CC_RCV_LEN read-only register for storing received information length, an I2C_CC_RCV read-only register for storing the received information and an I2C_CC_STATUS read-only state register. The four registers are all connected with the respective CPU by I2C bus interfaces, and the transmitting module and the receiving module are connected with the respective CPU by an interrupt request line via a GPIO interface. The present invention realizes radio communication between two CPU and the two-way alternation of commands and control signals, is more reliable and faster and can not be puzzled by data lines. The present invention can be widely used in radio household electrical appliances and devices.

Description

I 2The wireless transmitting system of C bus data

Technical field

The invention belongs to technical field of data transmission, more particularly relate to I ²The design of the wireless transmitting system of C bus data.

Background technology

Along with the development of Radio Transmission Technology, by the wireless mode interconnection, originally connect the equipment room that intercoms mutually and be separated a segment distance or be put into different place (for example different rooms) between the more and more equipments by data line.Traditional wireless transmitting system function is all simpler, and generally there are not two control and Be Controlled problems between the module in the just emission and the reception of signal.

But along with the lifting of wireless transmitting system function, equipment room need pass through I ²The C bus intercoms mutually, to realize control visit and the exchanges data of CPU between two equipment.If the I between them ²The C data realize by very long data line, not only can't realize whole wireless penetration, and the distance of transmission also can be restricted.

Summary of the invention

Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of I is provided ²The wireless transmitting system of C bus data.It utilizes wireless transport module to realize communication between two CPU making the two-way exchange that can directly carry out order and control signal between two CPU, makes the communication at two ends more reliable, rapider, and is not subjected to the puzzlement of data line.Thereby when finishing the audio-video signal transmission, accomplish that really the wireless seamless process of two systems connects, and realize more powerful radio function.

In order to achieve the above object, the present invention includes transmitting terminal, receiving end and the radio path between them.Transmitting terminal and receiving end are built-in respectively transmitter module and receiver module.Transmitter module is connected with the CPU of transmitting end equipment, and receiver module is connected with the CPU of receiving device.Transmitting terminal and receiving end all are provided with following four registers: 1. I ²C_CC_SEND is used for transmitting data to the write-only register of 255 bytes of object element; 2. I ²C_CC_RCV_LEN, the read-only register of the length of the information that storage receives at last; 3. I ²C_CC_RCV, the read-only register of the information that storage receives at last; 4. I ²C_CC_STATUS, read-only status register.Above-mentioned four registers all pass through I ²The C bus interface links to each other with separately CPU.In addition, transmitting and receiving module also respectively has an interrupt request line interface to link to each other by a GPIO mouth (General Purpose Inputs and Outputs) with separately CPU.

The transmitting end equipment that links to each other with CPU is one of equipment such as DVD that audio-video signal can be provided, set-top box, wire signal line.The receiving device that links to each other with CPU is one of equipment such as LCD, PDP that Presentation Function can be provided.

I ²The C_CC_SEND register has kept connection status position, emission state position and accepting state position.When the mode bit in the status register changes, will lead to IRQ request line and state that CPU is by reading I ²The value of C_CC_STATUS register is stated the state of IRQ line again.In order to pass through End to End (end-to-end) channel transfer information, the CPU that links to each other with the wireless transmission/reception module need finish following step:

By reading I ²The value of C_CC_STATUS register confirms that End to End passage is to be in successfully connection status;

To need the information transmitted data to write I ²In the C_CC_SEND register, the border of information is defined by the START and the STOP condition of iic bus;

By reading I ²The value of C_CC_STATUS register, confirmation quilt corresponding module with it receives successfully.

In order to receive information by End to End passage, the CPU that links to each other with the wireless transmission/reception module need finish following step:

By reading I ²The value of C_CC_STATUS register, whether fox message is received;

By reading I ²The value of C_CC_RCV_LEN register is obtained the length of the information of reception;

From I ²Read the information that receives in the C_CC_RCV register.

Except can having influence on losing of information under the situation of connection failure, wireless transport module can be guaranteed the reliability of communicating by letter, but there is not the problem of reliable connection in outside CPU.

In wireless transmitting system, the reliability of subscriber channel is to add a sequence number and send a confirmation after receiving data by each data that are transmitted to realize to transmitter unit.If this confirmation was not received in a specific time, the data that are transmitted so will be sent again.This information sequence number will help the receiving element of wireless transport module to abandon those may be owing to transmit the data of the repetition that brings once more.

Task of the present invention comes to this and finishes.

The present invention utilizes wireless transport module to realize communication between two CPU making the two-way exchange that can directly carry out order and control signal between two CPU, makes the communication at two ends more reliable, rapider, and is not subjected to the puzzlement of data line.Thereby when finishing the audio-video signal transmission, accomplish that really the wireless seamless process of two systems connects, and realize more powerful radio function.The Related product deviser can by to two not in same equipment the data of the register of two separate CPUs be provided with, utilize the information that the passage of End toEnd realize to need realizes and the transmission of control signal; To reach mutually radio communication reliably.

Description of drawings

Fig. 1 is the synoptic diagram of transmitting terminal of the present invention and receiving end.

Fig. 2 is a general structure synoptic diagram of the present invention.

Embodiment

Embodiment 1.A kind of I ²The wireless transmitting system of C bus data, as depicted in figs. 1 and 2.It comprises transmitting terminal 1, receiving end 2 and the radio path between them 3.Transmitting terminal 1 and receiving end 2 are built-in respectively transmitter module and receiver module.Transmitter module is connected with the CPU of the equipment of transmitting terminal 1, and receiver module is connected with the CPU of the equipment of receiving end 2.Transmitting terminal 1 and receiving end 2 all are provided with following four registers: 1. I ²C_CC_SEND is used for transmitting data to the write-only register 4 of 255 bytes of object element; 2. I ²C_CC_RCV_LEN, the read-only register 5 of the length of the information that storage receives at last; 3. I ²C_CC_RCV, the read-only register 6 of the information that storage receives at last; 4. I ²C_CC_STATUS, read-only status register 7.Above-mentioned four registers all pass through I ²The C bus interface links to each other with separately CPU.In addition, transmitting and receiving module also respectively has an interrupt request line IRQ interface to link to each other by a GPIO mouth (General Purpose Inputs and Outputs) with separately CPU.

The equipment of the transmitting terminal 1 that links to each other with CPU is one of equipment such as DVD that audio-video signal can be provided, set-top box, wire signal line.The equipment of the receiving end 2 that links to each other with CPU is one of equipment such as LCD, PDP that Presentation Function can be provided.

Embodiment 1 has realized the radio communication between two CPU and the two-way exchange of order and control signal, and is more reliable, rapid, is not subjected to the puzzlement of data line.When finishing the audio-video signal transmission, accomplish that really the wireless seamless process of two systems connects, and realize more powerful radio function.It can be widely used in the wireless appliance equipment.

Claims

1. I ²The wireless transmitting system of C bus data, it comprises transmitting terminal, receiving end and the radio path between them, it is characterized in that: transmitting terminal and receiving end are built-in respectively transmitter module and receiver module, transmitter module is connected with the CPU of transmitting end equipment, receiver module is connected with the CPU of receiving device, and transmitting terminal and receiving end all are provided with following four registers: 1. I ²C_CC_SEND is used for storing the write-only register of wanting information transmitted, and the capacity of described write-only register is 255 bytes; 2. I ²C_CC_RCV_LEN, the read-only register of the length of the information that storage receives at last; 3. I ²C_CC_RCV, the read-only register of the information that storage receives at last; 4. I ²C_CC_STATUS, read-only status register; Above-mentioned four registers all pass through I ²The C bus interface links to each other with separately CPU, and in addition, transmitting and receiving module also respectively has an interrupt request line interface to link to each other by a GPIO mouth with separately CPU.

2. according to the described I of claim 1 ²The wireless transmitting system of C bus data is characterized in that: said transmitting end equipment is one of DVD that audio-video signal can be provided, set-top box, wire signal line equipment, and receiving device is one of LCD that Presentation Function can be provided, PDP equipment.