Mil1394B bus interface photoelectric conversion control method

Abstract

The invention relates to a Mil1394B bus interface photoelectric conversion control method. The method comprises the following steps: 1) sending conversion control from a 1394 PHY electric sending interface to a photoelectric module interface; and 2) receiving conversion control from the photoelectric module interface to the 1394 PHY electric receiving interface. According to the invention, stable connection of the MiL1394B optical interface and efficient data interconnection and intercommunication can be ensured.

Description

Technical Field

[0001] The invention relates to the fields of aviation, navigation and industrial control, and in particular to a MiL1394B interface photoelectric conversion control method. Background Art

[0002] As an industrial standard high-speed serial bus, 1394 bus interface has been widely used in digital video cameras, digital cameras, TV set-top boxes, home game consoles, computers and their peripherals. MiL1394B, as a 1394 bus interface used in special fields, has also been widely used in aviation, aerospace and industrial control fields. However, the main MiL1394B bus interface interconnection still uses electrical interface for interconnection, and no effective control method and strategy has been found in the application of photoelectric conversion interface. Summary of the invention

[0003] In order to solve the application of MiL1394B in the photoelectric conversion interface, the present invention provides a photoelectric conversion control method of a Mil1394B bus interface, which realizes the conversion control of the Mil1394B electrical interface to the optical interface, and can ensure the stable connection of the MiL1394B optical interface and efficient data interconnection.

[0004] The technical solution of the present invention is: the present invention is a Mil1394B bus interface photoelectric conversion control method, which is special in that the method comprises the following steps:

[0005] 1) Transmission conversion control from 1394PHY electrical transmission interface to optoelectronic module interface;

[0006] 1.1) When the transmission signals TX+ and TX- of 1394PHY are coupled in the optoelectronic module, the transmission signals TX+ and TX- are led out through the termination circuit and connected to the TD+ and TD- of the optoelectronic module;

[0007] 1.2) Draw out the common mode voltage signal between the transmission signals TX+ and TX- of 1394PHY, connect it to the comparator, and connect it to the comparator for comparison with the characteristic comparison voltage;

[0008] 1.3) Connect the output of the comparator to the transmit enable control pin TXDIS of the optoelectronic module to complete the optoelectronic conversion transmission control;

[0009] 2) Receiving conversion control from the optoelectronic module interface to the 1394PHY electrical receiving interface;

[0010] 2.1) When the receiving signals RX- and RX+ of 1394PHY are coupled in the optoelectronic module, the receiving signals RD+ and RD- of the optoelectronic module are connected to the input pins IN+ and IN- of the bus switch through the termination circuit, and the output pins OUT+ and OUT- of the bus switch are connected to the receiving signals RX+ and RX- of 1394PHY through the termination circuit;

[0011] 2.2) Connect the signal detection pin LOS of the optoelectronic module to the enable pin of the bus switch to complete the optoelectronic conversion receiving control.

[0012] The present invention provides a Mil1394B interface photoelectric conversion control method, including the transmission conversion control from the 1394PHY electrical transmission interface to the photoelectric module interface, and the reception conversion control from the photoelectric module interface to the 1394PHY electrical reception interface. The present invention realizes the conversion control from the Mil1394B electrical interface to the optical interface, and can ensure the stable connection, efficient and safe interconnection and interaction of the Mil1394 photoelectric conversion interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the process of the present invention;

[0014] Figure 2 It is a schematic diagram of a flow chart of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] See also Figure 1 The steps of the Mil1394B bus interface photoelectric conversion control method of the present invention are as follows:

[0017] 1) Transmission conversion control from 1394PHY electrical transmission interface to optoelectronic module interface;

[0018] 1.1) When the transmission signals TX+ and TX- of 1394PHY are coupled in the optoelectronic module, the transmission signals TX+ and TX- are led out through the termination circuit and connected to the TD+ and TD- of the optoelectronic module;

[0019] 1.2) Draw out the common mode voltage signal between the transmission signals TX+ and TX- of 1394PHY, connect it to the comparator, and connect it to the comparator for comparison with the characteristic comparison voltage;

[0020] 1.3) Connect the output of the comparator to the transmit enable control pin TXDIS of the optoelectronic module to complete the optoelectronic conversion transmission control;

[0021] 2) Receiving conversion control from the optoelectronic module interface to the 1394PHY electrical receiving interface;

[0022] 2.1) When the receiving signals RX- and RX+ of 1394PHY are coupled in the optoelectronic module, the receiving signals RD+ and RD- of the optoelectronic module are connected to the input pins IN+ and IN- of the bus switch through the termination circuit, and the output pins OUT+ and OUT- of the bus switch are connected to the receiving signals RX+ and RX- of 1394PHY through the termination circuit;

[0023] 2.2) Connect the signal detection pin LOS of the optoelectronic module to the enable pin of the bus switch to complete the optoelectronic conversion receiving control.

[0024] See also Figure 2 The steps of the specific embodiment of the Mil1394B bus interface photoelectric conversion control method of the present invention include:

[0025] 1) Transmission conversion control from 1394PHY electrical transmission interface to optoelectronic module interface, including 1394PHY transmission signal termination, common mode voltage comparison, and optical module enable control.

[0026] When the Mil1394B bus interface is interconnected, it is necessary to first use the handshake signal to perform handshake control to complete speed negotiation, etc., and finally communicate. Since the handshake signal is not a continuous transmission signal, it cannot be directly connected to the optical module for conversion control. Therefore, when the 1394PHY sending electrical interface is controlled by photoelectric conversion, the 1394PHY sending signal TX+ and TX- signals are first connected to the signal comparator through the termination circuit, and then terminated to the TD+ and TD- of the optical module through the comparator. Then, the signal is derived from the common mode voltage of the sending signal and connected to the comparator. It is compared with a specific comparison voltage to determine whether there is a valid handshake signal or continuous data and communication signal. Finally, through the validity judgment of the signal, the judgment signal is connected to the sending enable control pin TXDis of the optical module to ensure that when a valid sending signal arrives, the optical module is enabled to emit light output to achieve sending control.

[0027] 2) The receiving conversion control from the optoelectronic module interface to the 1394PHY electrical receiving interface includes 1394PHY receiving signal termination, optical signal detection, and receiving signal switch control.

[0028] For receiving control, since the PHY receiving interface of 1394PHY is more sensitive to signal perception in the photoelectric conversion, it is necessary to ensure in the circuit that when the valid received optical signal arrives, the converted electrical signal is sent to 1394PHY again. Therefore, in the receiving photoelectric conversion control, the receiving signals RD+ and RD- of the optical module are first connected to the inputs IN+ and IN- of the bus switch, and then the outputs OUT+ and OUT- of the bus switch are connected to the receiving signals RX+ and RX- of 1394PHY. At the same time, the effective detection signal LOS of the optical module is connected to the enable pin of the bus switch, so as to ensure that when the optical module receives effectively, the received electrical signal converted by the enabled optical module is connected to the receiving signals RX+ and RX- connected to 1394PHY to complete the receiving control.

[0029] The above are only specific embodiments disclosed in the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

[0030] The content of the present invention and the technical content not specifically described in the above embodiments are the same as the prior art.

[0031] The present invention is not limited to the above embodiments, and all of the contents of the present invention can be implemented and have the above good effects.

Claims

1. A Mil1394B bus interface photoelectric conversion control method, characterized in that: The method comprises the following steps: 1) Transmission conversion control from 1394PHY electrical transmission interface to optoelectronic module interface; 1.1) When the transmission signals TX+ and TX- of 1394PHY are coupled in the optoelectronic module, the transmission signals TX+ and TX- are led out through the termination circuit and connected to the TD+ and TD- of the optoelectronic module; 1.2) Draw out the common mode voltage signal between the transmission signals TX+ and TX- of 1394PHY, connect it to the comparator, and connect it to the comparator for comparison with the characteristic comparison voltage; 1.3) Connect the output of the comparator to the transmit enable control pin TXDIS of the optoelectronic module to complete the optoelectronic conversion transmission control; 2) Receiving conversion control from the optoelectronic module interface to the 1394PHY electrical receiving interface; 2.1) When the receiving signals RX- and RX+ of 1394PHY are coupled in the optoelectronic module, the receiving signals RD+ and RD- of the optoelectronic module are connected to the input pins IN+ and IN- of the bus switch through the termination circuit, and the output pins OUT+ and OUT- of the bus switch are connected to the receiving signals RX+ and RX- of 1394PHY through the termination circuit; 2.2) Connect the signal detection pin LOS of the optoelectronic module to the enable pin of the bus switch to complete the optoelectronic conversion receiving control.

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