CN100543711C - Certainly the ring of embedded type CPU minimum systematic module is communicated with test and program downloading apparatus - Google Patents
Certainly the ring of embedded type CPU minimum systematic module is communicated with test and program downloading apparatus Download PDFInfo
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- CN100543711C CN100543711C CNB200710154654XA CN200710154654A CN100543711C CN 100543711 C CN100543711 C CN 100543711C CN B200710154654X A CNB200710154654X A CN B200710154654XA CN 200710154654 A CN200710154654 A CN 200710154654A CN 100543711 C CN100543711 C CN 100543711C
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Abstract
The invention provides the device that a kind of ring certainly that is used for embedded type CPU minimum systematic module is communicated with test and application program download, wherein, this device comprises: buffer cell, be connected the uncertain pin of embedded type CPU minimum systematic module and certainly ring be communicated with between the test circuit; And control module, its control end is connected with buffer cell, is used to control the state of buffer cell.Therefore, adopt device of the present invention in the production run of minimum systematic module, productivity test and being operated in the device of application program download to be realized, and between two links, without plug-in module, also saved R﹠D costs simultaneously, shortened the R﹠D cycle.
Description
Technical field
The present invention relates to download apparatus, more specifically, relate to the device that a kind of ring certainly that is used for embedded type CPU minimum systematic module is communicated with test and application program download.
Background technology
The embedded type CPU minimum system is widely used in the IT product, and application program is moved so that functional subsystems such as circuit integrated circuit board are managed on the CPU minimum system.In order to accelerate tempo of development, the embedded type CPU minimum system through regular meeting by modularization.In the suitability for industrialized production of IT product, need fast, test to embedded type CPU minimum systematic module down load application program and to the welding situation of module in large quantity, this test can be called the productivity test.
Productivity test be on the product line for the integrality of the embedded type CPU minimum systematic module welding of verifying production and module on a kind of test whether working properly of each unit.The productivity test needs to download test procedure to embedded minimum systematic module, and the download of this test procedure is the same with the method that normal application is downloaded.Normal application need be loaded on the module before module is dispatched from the factory preceding or is assembled on the subsystem that uses this module in module.
Fast large batch of in order to realize to embedded type CPU minimum systematic module down load application program, often plurality of modules is placed on the device, utilize this device to carry out program and download, rather than module is put on the subsystem that uses this module downloads.In addition, if realize placing on the module in-system programming (also being that the downloading guides program needn't be extracted burning again to memory device from module) of the memory device of boot, also need the device of the special usefulness that downloads.
Fig. 1 is according to the simple program downloading apparatus of prior art and the connection layout of module.
Normal application is after download on the device of Fig. 1 finishes, and operation is immediately got up.From the external pin of module, after getting up, program run can export high-low level to some pin operation unavoidably.As shown in Figure 1, can not carry out which kind of operation to which pin, for the purpose of the insurance, on download apparatus, will carry out unsettled design the uncertain input and output pin of module owing to know normal application.
Outmost framework among Fig. 1 is a download apparatus, can only be to embedded type CPU minimum systematic module down load application program.Among Fig. 1 really the fixed tube pin be the pin of definition of embedded type CPU minimum systematic module, the pin of interfaces such as Ethernet, JTAG, HDLC and SPI for example, can also be the local bus pins such as address, data and sheet choosing of module, also have the pin on power supply and ground etc. certainly.Module fixed tube pin really can be linked on the download apparatus, communicates with the relevant interface on the download apparatus, finishes the program download function.Uncertain pin is generally the pin of the programming device on the module and the universal I pin of CPU.Minimum systematic module is used on the different functional subsystems, and the logic on the module of every kind of application correspondence in the programming device is different, that is to say that the output input direction of the pin of programming device is uncertain.Download apparatus among Fig. 1 downloads to module, comprises the configuration file of programming device on the module in the program, after therefore download finishes, must guarantee that uncertain pin is unsettled, promptly is free of attachment to the circuit on the download apparatus.
Fig. 2 is according to the test procedure download of prior art and the connection layout of production test device and module.
As shown in Figure 2, carry out the productivity test to minimum systematic module and need install, be i.e. the framework of the outermost among Fig. 2 with another.This device can only be downloaded test procedure and carry out the productivity test, can not download normal application to module with this device.In Fig. 2, the uncertain pin of module has also been received in the circuit of device.The test procedure of module is unique, and is different and different with the application scenario unlike normal application.Therefore, the uncertain pin of minimum systematic module has become the pin that the output input direction is determined, can receive in the circuit of device and carry out the productivity test, and this partial circuit in the device can be simple loopback form.
This shows that general download can only use two different devices to realize the download of application program and production test program with method of testing.
Summary of the invention
In order to solve the problems of the prior art, the present invention proposes the device that a kind of ring certainly that is used for embedded type CPU minimum systematic module is communicated with test and application program download, this device comprises: buffer cell, be connected the uncertain pin of embedded type CPU minimum systematic module and certainly ring be communicated with between the test circuit; And control module, its control end is connected with buffer cell, is used to control the state of buffer cell.
Wherein, buffer cell is one or more switches.
Control module makes uncertain pin and is communicated with the test circuit conducting from ring carrying out controlling one or more switch closures under the situation of ring connection test; And control module carrying out controlling one or more switch opens under the situation that application program downloads, and makes uncertain pin and is communicated with test circuit and ends from encircling.
Simultaneously, control module is the control module that is independent of embedded type CPU minimum systematic module.
In addition, control module is the control module of embedded type CPU minimum systematic module, select embedded type CPU minimum systematic module really the input pin in the fixed tube pin be connected to buffer cell as control end.
Be connected to pull-up resistor and pull down resistor on the control end of control module, be used for when device energising just or wait command state, buffer module being ended.
Therefore, using device of the present invention can realize productivity test and being operated on the device of application program download in the production run of minimum systematic module, and between two links, without plug-in module, also saved R﹠D costs simultaneously, shortened the R﹠D cycle.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is according to the simple program downloading apparatus of prior art and the connection layout of module;
Fig. 2 is according to the test procedure download of prior art and the connection layout of production test device and module;
Fig. 3 is the block diagram that the ring certainly that is used for embedded type CPU minimum systematic module according to the present invention is communicated with the device of test and application program download;
Fig. 4 downloads and the be connected block diagram of production test device with module according to the test of first embodiment of apparatus of the present invention/normal application;
Fig. 5 is the schematic internal view according to the snubber assembly of first embodiment of apparatus of the present invention;
Fig. 6 is the block diagram according to the CPU minimum system control snubber assembly of second embodiment of apparatus of the present invention; And
Fig. 7 is a block diagram of determining the input pin control snubber assembly in the pin according to the module self of the 3rd embodiment of apparatus of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
How the uncertain pin of module is isolated with downloading proving installation when main points of the present invention are to download normal application, and when downloading test application and carry out the productivity test, these pins can be communicated to the interlock circuit on the device again.
Fig. 3 is the block diagram that the ring certainly that is used for embedded type CPU minimum systematic module according to the present invention is communicated with the device 300 of test and application program download.
As shown in Figure 3, this device comprises: buffer cell 302, be connected the uncertain pin of embedded type CPU minimum systematic module and certainly ring be communicated with between the test circuit; And control module 304, its control end is connected with buffer cell, is used to control the state of buffer cell.
Wherein, buffer cell 302 is one or more switches.
Control module 304 makes uncertain pin and is communicated with the test circuit conducting from ring carrying out controlling one or more switch closures under the situation of ring connection test; And control module 304 carrying out controlling one or more switch opens under the situation that application program downloads, and makes uncertain pin and is communicated with test circuit and ends from encircling.
Simultaneously, control module 304 is the control modules that are independent of embedded type CPU minimum systematic module.
In addition, control module 304 is control modules of embedded type CPU minimum systematic module, select embedded type CPU minimum systematic module really the input pin in the fixed tube pin be connected to buffer cell 302 as control end.
Be connected to pull-up resistor and pull down resistor on the control end of control module 304, be used for when device energising just or wait command state, buffer module being ended.
Fig. 4 downloads and the be connected block diagram of production test device with module according to the test of first embodiment of apparatus of the present invention/normal application.
As shown in Figure 4, the framework of outermost is to download and proving installation, can finish two kinds of functions: download test procedure and carry out ring connection test certainly; And to module down load application program.Because between the uncertain pin of module and the connection of the ring certainly test circuit on the device, added snubber assembly, thus can finish this two kinds of functions with a device, and control signal control snubber assembly conducting is arranged or end (isolation).When carrying out the test procedure download and ring is communicated with test certainly, the control snubber assembly is a conducting state.When carrying out the normal application download, the control snubber assembly is a cut-off state, and be communicated with the test circuit isolation to the ring certainly on uncertain pin on the module and the device this moment, avoided data collision.
On the module really the fixed tube pin can directly link in the circuit of device, carry out the communication of variety of way and mutual with device, to finish download and test function.
Fig. 5 is the schematic internal view according to the snubber assembly of first embodiment of apparatus of the present invention.
As shown in Figure 5, control end can be controlled the closure of n switch and open.When carrying out the test procedure download and ring is communicated with test certainly, switch closure; When carrying out the normal application download, switch opens, being electrically connected between uncertain pin and the download apparatus avoided level conflict on the disconnection module.
Fig. 6 is the block diagram according to the CPU minimum system control snubber assembly of second embodiment of apparatus of the present invention.
As shown in Figure 6, between the connection circuit of ring certainly of the uncertain pin of module and device, add snubber assembly.Install the CPU minimum system control snubber assembly conducting of self and end.
Device among Fig. 6 can carry out test procedure to module successively and download, encircles certainly to be communicated with and test and the normal application download.Install the automatic program identification of moving in self minimum system and be in which step, if download or encircle certainly the connection testing procedure at test procedure, program will be controlled the snubber assembly conducting, if in the normal application download state, program will be controlled snubber assembly and end.The control end of snubber assembly will connect and draw resistance, pull down resistor to guarantee when device has just powered on or has been in the wait command state by snubber assembly.
When controlling snubber assembly, need the minimum system of device self and tested embedded type CPU minimum systematic module to carry out mutual nearly with the minimum system of device self.
Fig. 7 is a block diagram of determining the input pin control snubber assembly in the pin according to the module self of the 3rd embodiment of apparatus of the present invention.
As shown in Figure 7, IP represents the input pin in definite pin, and these pins are connected to the control end of snubber assembly.These pins are input pin when normal application is moved, the input pin of the HDLC on the CPU, SPI and UART for example, the input pin of the proprietary protocol interface of for example realizing with programming device again.The pin of the HDLC on the CPU, SPI and UART interface generally can be multiplexed with universal I and use, and the IO pin of programmable logic device (PLD) is programmed configurations arbitrarily.Like this, we select some these type of pins and are made as the universal I of output state when writing test procedure (note here test procedure comprise the configuration file in the programming device on the module), are used for controlling the conducting of snubber assembly and ending.
When the operation normal application, these pins use as input pin, and the snubber assembly that can not mislead causes data collision.Select to determine that the input pin in the pin should be noted that 2 points as the snubber assembly control end: be chosen in the pin of all doing input pin in whole development project even the application program in larger scope, will not be configured to common IO and use; And module is placed into when downloading on the proving installation, and the input pin of these certain communication protocol interfaces guarantees not link to each other with the output pin of certain interface on the device, preferably only has been connected to the control end of snubber assembly.
When determining input pin control snubber assembly in the pin with module self, the minimum system that installs self needn't carry out close mutual with tested minimum systematic module.Tested module can oneself be carried out loopback and is communicated with test, gives the minimum system reported result of device self just passable after test finishes.
In sum, adopt device of the present invention in the production run of minimum systematic module, productivity test and being operated on the device of application program download to be realized, and between two links, without plug-in module, also saved R﹠D costs simultaneously, shortened the R﹠D cycle.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. one kind is used for the connection test of ring certainly of embedded type CPU minimum systematic module and the device that application program is downloaded, and it is characterized in that, comprising:
Buffer cell, be connected the uncertain pin of described embedded type CPU minimum systematic module and certainly ring be communicated with between the test circuit; And
Control module, its control end is connected with described buffer cell, is used to control the state of described buffer cell.
2. device according to claim 1 is characterized in that, described buffer cell is one or more switches.
3. device according to claim 2 is characterized in that,
Described control module is controlled described one or more switch closure under the situation of carrying out the described connection of ring certainly test, make described uncertain pin be communicated with the test circuit conducting with described from encircling; And
Described control module is controlled described one or more switch opens under the situation of carrying out described application program download, make described uncertain pin be communicated with test circuit with described ring certainly and end.
4. according to each described device in the claim 1 to 3, it is characterized in that described control module is the control module that is independent of described embedded type CPU minimum systematic module.
5. according to each described device in the claim 1 to 3, it is characterized in that, described control module is the control module of described embedded type CPU minimum systematic module, select described embedded type CPU minimum systematic module really the input pin in the fixed tube pin be connected to described buffer cell as described control end.
6. according to each described device in the claim 1 to 3, it is characterized in that, be connected to pull-up resistor and pull down resistor on the control end of described control module, be used for when energising just of described device or wait command state, described buffer module being ended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710154654XA CN100543711C (en) | 2007-09-20 | 2007-09-20 | Certainly the ring of embedded type CPU minimum systematic module is communicated with test and program downloading apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710154654XA CN100543711C (en) | 2007-09-20 | 2007-09-20 | Certainly the ring of embedded type CPU minimum systematic module is communicated with test and program downloading apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101145144A CN101145144A (en) | 2008-03-19 |
| CN100543711C true CN100543711C (en) | 2009-09-23 |
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| CN110119291A (en) * | 2019-05-17 | 2019-08-13 | 深圳市远弗科技有限公司 | The customization downloading and detection method and system of embedded vision mould group |
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Effective date of registration: 20151228 Address after: Yuhuatai District of Nanjing City, Jiangsu province 210012 Bauhinia Road No. 68 Patentee after: Nanjing Zhongxing New Software Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong high tech Industrial Park, ZTE building Patentee before: ZTE Corporation |
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Granted publication date: 20090923 Termination date: 20160920 |