CN2535878Y - Sharing device of on-line programmable integrated circuit development board for teaching experiment - Google Patents

Abstract

The utility model relates to a sharing device of an integrate circuit teaching experimental board which can program on line, which is characterized in that programming interfaces which can be connected with four computers in parallel are respectively connected with four sockets with six pins of the sharing device, the programming interface TCKA, TCKB, TCKC, TCKD are respectively connected with a sixth pin, a fifth pin, a forth pin, and a third pin of U2, TDO1 is connected with a ninth pin of the U2. TDIA, TDIB, TDIC, and TDID are respectively connected with a sixth pin, a fifth pin, a forth pin, and a third pin of U3. TMSA, TMSB, TMSC, TMSD are respectively connected with a tenth pin, an eleventh pin, a twelfth pin, and a thirteenth pin of U3. A second pin of the U2 is connected with a second pin of the U3, one end of R2 is connected with a third pin of a switch S1, and the other end is connected with + 5 volt. A fourteenth pin of the U2 is connected with a fourteenth pin of the U3, one end of R1 is connected with a fourth pin of the switch S1, and the other end is connected with + 5 volt. A first pin and a second pin of the dual in-line switch S1, a first pin of the U2, a fifteenth pin of the U2, a first pin of the U3, and a fifteenth pin of the U3 are all connected with the ground. The integrate circuit teaching experimental board which can program on line can be connected with a plurality of computers, thereby increasing the availability ratio, and reducing the investment cost of equipment.

Description

A kind of shared device of online programmable integrated circuit education experiment development board

Technical field:

The utility model belongs to electronic instruction experimental facilities technical field, particularly relates to the shared device of online programmable integrated circuit education experiment development board.

Background technology:

The model of online programmable integrated circuit education experiment development board is a lot of at present, " the JDEE-32 type is at the system programmable device experimental box " as electrician of Shanghai university of communications and electronics experiment center development, " the MDL-ISP type brassboard " that Science and Educational INstrument Factory, Fudan Univ is made, " the GW48-CK type EDA experiment/development system " that Hangzhou Ji Wei company limited makes, " the XPLD-2 type programmable logic device (PLD) brassboard " of Xi'an Communications University Information and Communication Engineering system development, and the patent No. be " at the system programmable logical circuit education experiment plate " of " 97230522 " and " programmable logic device (PLD) brassboard " that the patent No. is " 99227041 " etc.But existing these online programmable integrated circuit education experiment development boards are not owing to design shared circuit, do not possess the function that an online programmable integrated circuit education experiment plate links to each other with many computing machines, an online programmable logical device education experiment development board can only link to each other with a computing machine, and the utilization factor of online programmable integrated circuit education experiment plate is not high; And if the online programmable integrated circuit education experiment development board that many computing machines and these do not design shared device is directly linked to each other, it is uncertain programming control signal to occur, causes program fail.

If an online programmable integrated circuit education experiment development board possesses the function that links to each other with many computing machines, can improve the utilization factor of online programmable integrated circuit education experiment development board, and reduce the one-time investment expense of online programmable integrated circuit teaching experimental equipment.

Summary of the invention:

The utility model provides a kind of shared device that makes many computing machines share the education experiment plate of an online programmable integrated circuit, to improve the utilization factor of online programmable integrated circuit education experiment plate, reduce the one-time investment expense of online programmable integrated circuit teaching experimental equipment.

The shared device of this online programmable integrated circuit education experiment development board, it is characterized in that comprising that two models are that 4 of 74HC153 selects 1 integrated circuit U2 and U3, dual in line switch S1,2 1K Ω resistance R 1 and R2 and 4 single 6 needle sockets to form, the DLL (dynamic link library) of 4 computer parallel interfaces links to each other with 4 single 6 needle sockets respectively, the 1st pin of 4 single 6 needle sockets all connects+and 5 volts, the 2nd pin all connect power ground, and DLL (dynamic link library) signal end TCKA, TCKB, TCKC and the TCKD of 4 computing machines links to each other with the 6th pin, the 5th pin, the 4th pin and the 3rd pin of U2 respectively; The TDO1 signal end of 4 computing machines connects together and links to each other with the 9th pin of U2; DLL (dynamic link library) signal end TDIA, TDIB, TDIC and the TDID of 4 computing machines links to each other with the 6th pin, the 5th pin, the 4th pin and the 3rd pin of U3 respectively; DLL (dynamic link library) signal end TMSA, TMSB, TMSC and the TMSD of 4 computing machines links to each other with the 10th pin, the 11st pin, the 12nd pin and the 13rd pin of U3 respectively; The 2nd pin of U2 links to each other another termination+5 volt power supply of R2 with the end of the 2nd pin of U3, R2 and the 3rd pin of dual in line switch S1; The 14th pin of U2 links to each other another termination+5 volt power supply of R1 with the end of the 14th pin of U3, R1 and the 4th pin of dual in line switch S1; The 1st pin of the 1st pin of the 1st pin of dual in line switch S1 and the 2nd pin, U2, the 15th pin of U2, U3, the 15th pin of U3 all connect power ground.

The online programmable integrated circuit U1 of online programmable integrated circuit education experiment development board (for example XC9572, XC95108, XCS05 or XCS10) has 4 DLL (dynamic link library) signal end: TCK (clock signal terminal), TDO (data output signal end), TDI (data input signal end) and TMS (mode select signal end).During use, the tck signal end of U1 is linked to each other with the 7th pin of U2; The 9th pin of U2, the 11st pin, the 12nd pin and the 13rd pin link together, and link to each other with the TDO signal end of U1; The TDI signal end of U1 links to each other with the 7th pin of U3; The tms signal end of U1 links to each other with the 9th pin of U2; In 4 computing machines of U2 and U3 control 1 links to each other with the online programmable integrated circuit; S1 is made up of two toggle switches, and every toggle switch has " leading to " and " breaking " two states, and promptly switch S 1 can have four kinds of selection modes; By " leading to " and " breaking " state that changes two toggle switches, can select the programming pin of programmable integrated circuit to link to each other with a computing machine in being connected interface JA, JB, JC or JD; When more if desired computing machine is shared an online programmable integrated circuit education experiment plate, for example need 8 computing machines to share an online programmable integrated circuit education experiment plate, as long as adopt 2 74HC151,8 the 6 single sockets of pin, 3 toggle switches and 3 1K Ω resistance, select input end for three of 3 toggle switches and 2 74HC151 of 3 1K Ω resistance control, form 8 and select 1 circuit, can select to link to each other, realize that an online programmable integrated circuit education experiment development board possesses the function that links to each other with 8 computing machines with 1 computing machine in 8 computing machines; The rest may be inferred, can realize that also an online programmable integrated circuit education experiment development board possesses the function that links to each other with more computing machines.

Compare with conventional online programmable integrated circuit education experiment development board, because the utility model has adopted multichannel selection technology, a kind of shared device of online programmable integrated circuit education experiment development board is provided, can realize that an online programmable integrated circuit education experiment plate links to each other with many computing machines, improve the utilization factor of online programmable integrated circuit education experiment plate, reduced the one-time investment expense of teaching experimental equipment simultaneously.Laboratory that 40 computing machines are arranged for example, the supporting 40 blocks of online programmable integrated circuit education experiment plates of former needs, if adopt the shared device of the utility model online programmable integrated circuit education experiment development board, when selecting 2 computing machines to share the scheme of an online programmable integrated circuit education experiment plate, only need 20 blocks of online programmable integrated circuit education experiment plates; If select 4 computing machines to share the scheme of an online programmable integrated circuit education experiment plate, only need 10 blocks of online programmable integrated circuit education experiment plates, this just greatly reduces the investment cost of teaching experimental equipment.

Description of drawings:

Fig. 1 is the circuit of the shared device of the utility model online programmable integrated circuit education experiment development board.

Fig. 2 is the circuit that the utility model shared device circuit is connected with programmable integrated circuit in the online programmable integrated circuit education experiment development board when specifically using, and the circuit in the wherein empty frame is the circuit of shared device.

Embodiment:

Link to each other with 4 computing machines with an online programmable integrated circuit education experiment development board below in conjunction with description of drawings the utility model, and be generalized to the embodiment that a development board links to each other with many computing machines thus.

The shared device of present embodiment online programmable integrated circuit education experiment development board comprises that two models are that 4 of 74HC153 selects 1 integrated circuit U2 and U3, dual in line switch S1, resistance R 1 (1K Ω), resistance R 2 (1K Ω), 4 single 6 needle sockets to form; Physical circuit is as shown in Figure 1: the DLL (dynamic link library) of 4 computer parallel interfaces links to each other with 4 single 6 needle sockets respectively, the 1st pin of 4 single 6 needle sockets all connects+and 5 volts, the 2nd pin of 4 single 6 needle sockets all connects power ground, the end name that is connected on the DLL (dynamic link library) signal end of 4 computing machines is respectively the interface of TCKA, TCKB, TCKC and TCKD, links to each other with the 6th pin, the 5th pin, the 4th pin and the 3rd pin of U2 respectively; The TDO1 signal end of 4 computing machines connects together and links to each other with the 9th pin of U2; The end name of the signal end of 4 computing machines is respectively the interface of TDIA, TDIB, TDIC and TDID, links to each other with the 6th pin, the 5th pin, the 4th pin and the 3rd pin of U3 respectively; The end name of the signal end of 4 computing machines is respectively the interface of TMSA, TMSB, TMSC and TMSD, links to each other with the 10th pin, the 11st pin, the 12nd pin and the 13rd pin of U3 respectively; The 2nd pin of U2 links to each other another termination+5 volt power supply of R2 with the end of the 2nd pin of U3, R2 and the 3rd pin of dual in line switch S1; The 14th pin of U2 links to each other another termination+5 volt power supply of R1 with the end of the 14th pin of U3, R1 and the 4th pin of dual in line switch S1; The 1st pin of dual in line switch S1 and the 2nd pin, the 1st pin of U2, the 15th pin of U2, the 1st pin of U3, the 15th pin of U3 connects power ground respectively.

The online programmable integrated circuit U1 of online programmable integrated circuit education experiment development board (for example XC9572, XC95108, XCS05 or XCS10) has 4 DLL (dynamic link library) signal end: TCK (clock signal terminal), TDO (data output signal end), TDI (data input signal end) and TMS (mode select signal end).During use, the tck signal end of U1 is linked to each other with the 7th pin of U2; The 9th pin of U2, the 11st pin, the 12nd pin and the 13rd pin link together, and link to each other with the TDO signal end of U1; The TDI signal end of U1 links to each other with the 7th pin of U3; The tms signal end of U1 links to each other with the 9th pin of U2; In 4 computing machines of U2 and U3 control 1 links to each other with the online programmable integrated circuit; S1 is made up of two toggle switches, and every toggle switch has " leading to " and " breaking " two states, and promptly switch S 1 can have four kinds of selection modes; When two toggle switches of S1 all are in the position of " leading to ", select the control pin to be low level for two of U2 and U3, U2 and U3 receive TCK, TDO1, TDI and TMS with TCKA, TDO, TDIA and TMSA signal respectively, and the programming pin of programmable integrated circuit is linked to each other with the computing machine that is connected interface JA; Be in the position of " breaking " when the 1st toggle switch of S1, the 1st pin of S1 and the 4th pin open circuit, the 14th pin of U2 and U3 is a high level, the 2nd toggle switch of S1 is in the position of " leading to ", the 2nd pin of S1 and the 3rd pin are connected, the 2nd pin of U2 and U3 is a low level, and U2 and U3 receive TCK, TDO1, TDI and TMS with TCKB, TDO, TDIB and TMSB signal respectively, and the programming pin of programmable integrated circuit U1 is linked to each other with the computing machine that is connected interface JB; In like manner, change " leading to " and " breaking " state of two toggle switches, one in the programming pin that can make programmable integrated circuit and the computing machine that is connected interface JC or JD links to each other; When 2 computing machines of needs are shared an online programmable integrated circuit education experiment plate, the DLL (dynamic link library) of computing machine can be connected on JA and the JB interface; When needing 3 computing machines to share an online programmable integrated circuit education experiment plate, the DLL (dynamic link library) of computing machine can be connected on JA, JB and the JC interface.

When the more computing machine of needs is shared an online programmable integrated circuit education experiment plate, for example need 8 computing machines to share an online programmable integrated circuit education experiment plate, as long as adopt 2 74HC151,8 single sockets of 6 pins, 3 toggle switches and 3 1K Ω resistance, select input end for three of 3 toggle switches and 2 74HC151 of 3 1K Ω resistance control, form 8 and select 1 circuit, selection links to each other with 1 computing machine in 8 computing machines, can realize that an online programmable integrated circuit education experiment development board possesses the function that links to each other with 8 computing machines.The rest may be inferred, can realize that also an online programmable integrated circuit education experiment development board possesses the function that links to each other with more computing machines.

Claims (2)

1, a kind of shared device of online programmable integrated circuit education experiment development board, it is characterized in that comprising that two models are that 4 of 74HC153 selects 1 integrated circuit U2 and U3, dual in line switch S1,2 1K Ω resistance R 1 and R2 and 4 single 6 needle sockets are formed, the DLL (dynamic link library) of 4 computer parallel interfaces links to each other with 4 single 6 needle sockets respectively, the 1st pin of 4 single 6 needle sockets all connects+and 5 volts, the 2nd pin all connects power ground, the DLL (dynamic link library) signal end TCKA of 4 computing machines, TCKB, TCKC and TCKD respectively with the 6th pin of U2, the 5th pin, the 4th pin links to each other with the 3rd pin; The TDO1 signal end of 4 computing machines connects together and links to each other with the 9th pin of U2; DLL (dynamic link library) signal end TDIA, TDIB, TDIC and the TDID of 4 computing machines links to each other with the 6th pin, the 5th pin, the 4th pin and the 3rd pin of U3 respectively; DLL (dynamic link library) signal end TMSA, TMSB, TMSC and the TMSD of 4 computing machines links to each other with the 13 pin with the 10th pin, the 11st pin, the 12nd pin of U3 respectively; The 2nd pin of U2 links to each other another termination+5 volt power supply of R2 with the end of the 2nd pin of U3, R2 and the 3rd pin of dual in line switch S1; The 14th pin of U2 links to each other another termination+5 volt power supply of R1 with the end of the 14th pin of U3, R1 and the 4th pin of dual in line switch S1; The 1st pin of the 1st pin of the 1st pin of dual in line switch S1 and the 2nd pin, U2, the 15th pin of U2, U3, the 15th pin of U3 all connect power ground.

2, the shared device of online programmable integrated circuit education experiment development board according to claim 1, be characterised in that when needing 8 computing machines to share an online programmable integrated circuit education experiment plate, adopt 2 74HC151,8 single sockets of 6 pins, 3 toggle switches and 3 1K Ω resistance, select input end, form 8 and select 1 circuit for three of 3 toggle switches and 2 74HC151 of 3 1K Ω resistance control.

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