CN101819431B - Device for simultaneously controlling TxDIS signal by hardware and software - Google Patents
Device for simultaneously controlling TxDIS signal by hardware and software Download PDFInfo
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- CN101819431B CN101819431B CN2010101167988A CN201010116798A CN101819431B CN 101819431 B CN101819431 B CN 101819431B CN 2010101167988 A CN2010101167988 A CN 2010101167988A CN 201010116798 A CN201010116798 A CN 201010116798A CN 101819431 B CN101819431 B CN 101819431B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a device for simultaneously controlling a TxDIS signal by hardware and software, which is applicable to fiber transmission modules. The device comprises a singlechip, an OR-gate and a laser-driver chip, wherein the two input ends of the OR-gate are respectively connected with the singlechip and an upper computer, and the two output ends of the OR-gate are respectively fanned out to a TxDIS input pin of the singlechip and a TxDIS input pin of the laser-driver chip, so that the singlechip receives a SoftTxDIS signal transmitted by the software of an upper computer by a I2C bus to change the SoftTxDIS pin level of the singlechip, and reports the state of the TxDIS pin of the singlechip to the upper computer by the I2C bus. By adopting the technical scheme of the invention, the fast response of the SFF-8472 protocol to the TxDIS signal can be realized, and the state of the TxDIS pin fanned out to the laser-driver chip can be read back; meanwhile, because of the built-in PLA function of the invention, the components are reduced and the cost is reduced.
Description
Technical field
The present invention relates to the optical communication technology field, relate in particular to a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for.
Background technology
At present, needed integrated module of optical transceiver kind is more and more in the diverse network, requires also increasingly high.In order to satisfy the ever-increasing demand of system, light delivery module just constantly moves towards standardization, miniaturization, intelligent development.Utilize intelligentized light delivery module, network management unit can be monitored temperature, supply voltage, the laser bias current of transceiver module in real time and transmitted and received luminous power.The measurement of these parameters can help administrative unit to find out the position of breaking down in the optical fiber link, simplifies maintenance work, improves the reliability of system.
In SFF-8472MSA, standard the detailed content of numerical diagnostic function and relevant SFF-8472.This regulation and stipulation, detecting and digitizing parameter signal on the circuit board of inside modules then, provide the result of process demarcation or digitized measurement result are provided and the demarcation parameter.These information are stored in the internal storage structure of standard, so that read through two cable serial line interfaces.
Based on the TxDis signal of SFF-8472 agreement, be used to control enabling of light delivery module transmitting terminal, the agreement regulation, transmitting terminal enables to be controlled by software and hardware respectively, and transmitting terminal is defaulted as enabled.The 6th of A2 [110] software control position that enables for transmitting terminal, if the software control function is under an embargo, the not effect of this position.If be not under an embargo, when it is written into " 1 ", transmitting terminal is turned off, and writes " 0 ", and transmitting terminal software enables, final enabling be and hardware-enabled " or " the result.This default conditions are " 0 ".Agreement also stipulates, when hardware controls, when light output reduces 10% above the time, representes that transmitting terminal is turned off, and this time must be controlled in the 10us, and software gets final product at 100ms.Equally, when hardware controls, when light output was increased to more than 90%, the expression transmitting terminal was unlocked, and this time also must be controlled in the 1ms, and software gets final product at 100ms.Can find out that agreement is very harsh to the time requirement of hardware controls.
Fig. 1 is the structural representation that the realization software and hardware is controlled the TxDIS telltale simultaneously in the prior art.As shown in Figure 1, usually, the method that realizes this function is to turn-off the TxDis signal through I/O way of interrupt hardware, controls the I/O signal of input through the mode of software programming, reaches the purpose of software control.If realize the requirement of the quick response of agreement regulation, this I/O interrupts being arranged to limit priority so, otherwise possibility response in the forfeiture shortest time when carrying out the service routine of limit priority because priority is not high; But often I/O interrupts in SCM system, being not easy to be made into limit priority, must realize interrupt nesting, and complicated risk is bigger but interrupt nesting is programmed, and causes storehouse to overflow easily, causes program crashing.
Summary of the invention
The objective of the invention is to propose a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for; Realized that not only the SFF-8472 agreement responds the TxDIS signal fast; The state that can also retaking of a year or grade be fanned out to laser-driven chip; And reduced device through built-in PLA function, reduced cost.
For reaching this purpose, the present invention adopts following technical scheme:
A kind of light delivery module that is used for realizes that software and hardware controls the device of TxDIS signal simultaneously; Be applicable in the light delivery module; Comprise single-chip microcomputer or door and laser driver chip; Or two inputs of door are connected respectively to single-chip microcomputer and host computer; Or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively, is used for the SoftTxDIS signal change single-chip microcomputer SoftTxDIS pin level that single-chip microcomputer reception upper computer software issues through the I2C bus, and single-chip microcomputer reports single-chip microcomputer TxDIS pin status through the I2C bus to host computer.
Said single-chip microcomputer comprises programmable logic array; Said or door is formed by said programmable logic array setting; Or two inputs of door are connected respectively to the input pin of HardTxDIS of PLADIN register input and the host computer of single-chip microcomputer; Or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively; Be used for single-chip microcomputer and receive the SoftTxDIS signal that upper computer software issues through the I2C bus, single-chip microcomputer removes to change SoftTxDIS pin level said programmable logic array or door through the PLADIN register is set again, realizes software control; Single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes hardware controls.
Said single-chip microcomputer is the ADuc7020 microcontroller.
Said single-chip microcomputer and said or door setting alone; Or two inputs of door are connected respectively to the SoftTxDIS pin of single-chip microcomputer and the HardTxDIS input pin of host computer; Or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively; Be used for single-chip microcomputer and receive the SoftTxDIS signal change single-chip microcomputer SoftTxDIS pin level that upper computer software issues through the I2C bus; Realize software control, single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes hardware controls.
Said single-chip microcomputer is the Mega88 microcontroller.
Said or door is the single or door chip of SN74LVC1G32.
Adopt technical scheme of the present invention, had following beneficial effect:
1, convenient and simple, with low cost, programming easily, be easy to expansion.The present invention utilization have embedded programmable logic array (in the time of programmable logic array, PLA) microprocessor, can practice thrift one or the space; Reduced cost like this, and in programming, realized being very easy to, convenient and simple; Simultaneously; The present invention also is easy to expand to through I/O and realizes the mode of response fast, and without interrupt nesting, has reduced the complexity and the risk of programming.
2, efficient is high, risk is less.Because the interrupt priority level of hardware and software control mode is the highest,, improved efficient like this so the speed of response is fast; Simultaneously, according to the requirement of SFF-8472, because quick response of the present invention to the response time strictness; Reduced the risk of makeing mistakes, security has had guarantee.Avoided using the mode of I/O interrupt nesting, and the storehouse that causes overflows, and causes program crashing.
Description of drawings
Fig. 1 is the structural representation that the realization software and hardware is controlled the TxDIS telltale simultaneously in the prior art.
Fig. 2 is used for the structural representation that light delivery module realization software and hardware is controlled the TxDIS telltale simultaneously in the specific embodiment of the invention one.
Fig. 3 is used for the structural representation that light delivery module realization software and hardware is controlled the TxDIS telltale simultaneously in the specific embodiment of the invention two.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through embodiment.
The main thought of technical scheme of the present invention is the microcontroller (MCU) that adopts as ADuc7020, its concrete PLA function, so its hardware controls and software control can through PLA be configured to through one or; Or the output of door is fanned out to the TxDIS input pin of laser driver chip, because be or door, but not I/O interrupts; Like this; Its response time can be in official hour, and MCU its state that also can read back through the pin that is fanned out to laser driver chip reports host computer; Perhaps adopt MCU, do not have the PLA function as Mega88, can be external one or; Its hardware controls and software control can be imported through this or door; Or the output of the door TxDIS input pin that is fanned out to laser driver chip respectively with turn back to MCU, let the MCU state of TxDIS that can read back, owing to adopted mode external or door; Its response is irrelevant with MCU, and the response time can be at the appointed time.
Fig. 2 is used for the structural representation that light delivery module realization software and hardware is controlled the TxDIS telltale simultaneously in the specific embodiment of the invention one.As shown in Figure 2; This device in the embodiment one comprises single-chip microcomputer and laser driver chip; That single-chip microcomputer adopts is ADuc7020MCU, and this single-chip microcomputer is embedded with PLA, can through be provided with PLA be one or; Or two inputs of door are connected respectively to the input pin of HardTxDIS of PLADIN register input and the host computer of single-chip microcomputer, or output be fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively.
Wherein single-chip microcomputer receives the SoftTxDIS signal that upper computer software issues through the I2C bus; Single-chip microcomputer removes to change PLA's or door SoftTxDIS pin level through the PLADIN register is set again; Realize the purpose of software control; Single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes the purpose of hardware controls.Single-chip microcomputer reports single-chip microcomputer TxDIS pin status through the I2C bus to host computer.
The SFF-8472 agreement is relatively stricter to the requirement of sequential, and the time of regulation TxDIS response is very fast, owing to adopt or this method of door, has avoided using on the software risk of interrupt nesting.
In this process; When software is realized; At first to dispose the form that the HardTxDIS pin configuration becomes the PLA input; Then the input of this input pin and the PLADIN register of corresponding modular unit mutually or, the PLADIN register is as the function of SoftTxDIS, or the output of door is fanned out to the input of laser driver.Because the SoftTxDIS signal is sent by upper computer software; The mode that it issues through the I2C bus changes its zone bit; Thereby reach the purpose of software control, and the I2C bus mode also is that interrupt priority level is the highest, so can not have influence on the response time of TxDIS yet.PLADIN upgrades according to the change of SoftTxDIS zone bit; The code of this part is put in the time interruption; The time priority of interrupt is lower than limit priority, but it can influence once by every 50ms, so also can not exceed the SFF-8472 agreement to the software control official hour.
Fig. 3 is used for the structural representation that light delivery module realization software and hardware is controlled the TxDIS telltale simultaneously in the specific embodiment of the invention two.This device in the embodiment two comprises single-chip microcomputer or door and laser driver chip; Single-chip microcomputer is the Mega88 microcontroller; This single-chip microcomputer does not have embedded PLA, single-chip microcomputer with or door be provided with alone, or door is the single or door chip of SN74LVC1G32; Or the door two inputs be connected respectively to the SoftTxDIS pin of single-chip microcomputer and the HardTxDIS input pin of host computer, or output be fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively.
Wherein, single-chip microcomputer receives the SoftTxDIS signal change single-chip microcomputer TxDIS pin level that upper computer software issues through the I2C bus, realizes software control, and single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes hardware controls.Single-chip microcomputer reports single-chip microcomputer TxDIS pin status through the I2C bus to host computer.
Because adopted mode external or door, its response is irrelevant with MCU, the response time can be at the appointed time.
Very simple on software is realized, the Mega88 microcontroller only need be controlled the SoftTxDIS pin and get final product because HardTxDIS directly through or export, without Mega88.Mega88 receives the SoftTxDIS signal that upper computer software issues through the I2C bus; Reach the purpose of software control; And I2C is sent by upper computer software owing to the SoftTxDIS signal, and the mode that it issues through the I2C bus changes its zone bit, thereby reaches the purpose of software control.And the I2C bus mode is that interrupt priority level is the highest, so also can not have influence on the response time of TxDIS.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. one kind is used for the device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously; It is characterized in that; Comprise single-chip microcomputer or door and laser driver chip; Or two inputs of door are connected respectively to single-chip microcomputer and host computer; Or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively, is used for the SoftTxDIS signal change single-chip microcomputer SoftTxDIS pin level that single-chip microcomputer reception upper computer software issues through the I2C bus, and single-chip microcomputer reports single-chip microcomputer TxDIS pin status through the I2C bus to host computer.
2. a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for according to claim 1; It is characterized in that; Said single-chip microcomputer comprises programmable logic array; Said or door is formed by said programmable logic array setting; Or two inputs of door are connected respectively to the input pin of HardTxDIS of PLADIN register input and the host computer of single-chip microcomputer, or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively, are used for the SoftTxDIS signal that single-chip microcomputer reception upper computer software issues through the I2C bus; Single-chip microcomputer removes to change SoftTxDIS pin level said programmable logic array or door through the PLADIN register is set again; Realize software control, single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes hardware controls.
3. a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for according to claim 2 is characterized in that said single-chip microcomputer is the ADuc7020 microcontroller.
4. a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for according to claim 1; It is characterized in that; Said single-chip microcomputer and said or door setting alone; Or two inputs of door are connected respectively to the SoftTxDIS pin of single-chip microcomputer and the HardTxDIS input pin of host computer; Or the output of door is fanned out to the TxDIS input pin of single-chip microcomputer and the TxDIS input pin of laser driver chip respectively, is used for single-chip microcomputer and receives the SoftTxDIS signal change single-chip microcomputer SoftTxDIS pin level that upper computer software issues through the I2C bus, the realization software control; Single-chip microcomputer receives the HardTxDIS input pin of host computer, realizes hardware controls.
5. a kind of device that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that is used for according to claim 4 is characterized in that said single-chip microcomputer is the Mega88 microcontroller.
6. according to claim 4 or 5 described a kind of devices that light delivery module realization software and hardware is controlled the TxDIS signal simultaneously that are used for, it is characterized in that said or door is the single or door chip of SN74LVC1G32.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101167988A CN101819431B (en) | 2010-03-03 | 2010-03-03 | Device for simultaneously controlling TxDIS signal by hardware and software |
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| CN2010101167988A CN101819431B (en) | 2010-03-03 | 2010-03-03 | Device for simultaneously controlling TxDIS signal by hardware and software |
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| CN101819431B true CN101819431B (en) | 2012-07-04 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500320A (en) * | 2001-02-05 | 2004-05-26 | Integrated memory controller circuit for fiber optics transceiver | |
| CN101409589A (en) * | 2007-10-08 | 2009-04-15 | 深圳新飞通光电子技术有限公司 | Drive circuit for laser |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005004698A (en) * | 2003-06-16 | 2005-01-06 | Sumitomo Electric Ind Ltd | Optical module and host system equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500320A (en) * | 2001-02-05 | 2004-05-26 | Integrated memory controller circuit for fiber optics transceiver | |
| CN101409589A (en) * | 2007-10-08 | 2009-04-15 | 深圳新飞通光电子技术有限公司 | Drive circuit for laser |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-4698A 2005.01.06 |
| 程社成.带数字诊断功能的小封装光模块研究.《无线电电子学》.2006,说明书第12,35-36,38,43-46,49-52页. * |
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Address after: 610041 D, 7, Tianfu Software Park, 599 century South Road, Chengdu hi tech Zone, Sichuan, 201 Patentee after: Nine letter asset management Limited by Share Ltd. Address before: 7, No. 216, No. 610000 South City Road, Chengdu hi tech Zone, Sichuan, 101, 201 Patentee before: SICHUAN SUPERXON INFORMATION TECHNOLOGY Co.,Ltd. |
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