CN100468335C - Method and device for on-line programming logic device - Google Patents

Abstract

The present invention relates to a method and device for online programming of logic devices. The method forms logic devices from different and/or the same manufacturer into a JTAG chain; online programming of any logic device on the JTAG chain includes: generating a JTAG chain containing A chained programming file in serial vector format of all logic device information or a chained programming file in a different format containing the position information of each logic device on the JTAG chain, the length of the JTAG instruction register, and the programming content of the logic device of the same manufacturer, for the above-mentioned chained programming The file is analyzed, and each logic device on the JTAG chain is programmed online. The invention has the advantages of enhancing the flexibility of online programming, reducing document management costs, occupying less physical resources, simplifying the system layout and wiring and programming process, and removing the manufacturer's private transplant code, and is suitable for embedded programming and remote upgrade and maintenance. .

Description

Method and device for online programming of logic devices

technical field

The invention relates to the field of data communication, in particular to a method and device for embedded online programming of programmable logic devices.

Background technique

In existing mid-to-high-end digital communication equipment, in order to realize various functions and meet cost requirements, multiple types of logic devices from different or the same manufacturers may be used at the same time. Most logic devices support in-circuit programming, which updates the contents of the logic device while the device is running or configures the logic device during power-up. Existing logic devices, such as: Complex Programmable Logic Device (CPLD for short), Erasable Programmable Logic Device (EPLD for short), Field Programmable Gate Array (Field Programmable GateArray, FPGA for short), etc. Supports programming or configuration via Joint Test Action Group (JTAG interface for short) (JTAG interface complies with IEEE 1149.1 standard). The current main technical solutions for JTAG programming of logic devices are:

Logic devices from different manufacturers form different JTAG chains, and logic devices from the same manufacturer share one JTAG chain for online programming. As shown in Figure 1, logic devices 1-4 of manufacturer A form the upper JTAG1 chain, and logic devices 1-4 of manufacturer B form the lower JTAG2 chain. The four logic devices on different JTAG chains in Figure 1 can be the same or different types of CPLD, EPLD, FPGA, etc.

On a JTAG chain formed by logic devices of the same manufacturer, when performing online programming for each logic device, first use the manufacturer’s programming tool to generate a programming file in the corresponding format, and include the information of each logic device on the JTAG chain in the corresponding format. In the programming file of the JTAG chain, the porting code of the manufacturer is then called to load the programming file into each logic device on the JTAG chain.

For example, as shown in Figure 1, the JTAG chain formed by the logic devices 1-4 of manufacturer A needs to use the programming tool provided by manufacturer A (such as: A is ALTERA company, which provides QUARTUS programming tool) to generate a programming tool in the corresponding format. file (such as: QUARTUS programming tool generates a programming file corresponding to the format of .jbc), include the programming content of logic device 1-4, and then call the porting code of manufacturer A (such as: the porting code corresponding to ALTERA company is JAM PLAYER) Load the programming file in the corresponding format into the corresponding logic device 1-4, and program or configure each logic device. For the JTAG chain formed by logic devices 1-4 of manufacturer B, it is necessary to use the programming tool provided by manufacturer B (for example: B is LATTICE company, which provides ispVM programming tool) to generate a programming file in the corresponding format (for example: ispVM programming tool generates corresponding The format is .vme programming file), include the programming content of the logic device 1-4 of manufacturer B, and then call the transplant code of manufacturer B (for example: the corresponding transplant code of LATTICE company is ispVMEmbedded) to load the programming file of the corresponding format Go to the corresponding logic device on the JTAG chain of manufacturer B to program or configure the logic device.

Existing solutions for programming logic devices need to use different JTAG physical connection chains, which increases the complexity of board layout and wiring; when programming each logic device on different types of JTAG chains, it is necessary to generate programming files in different formats , and call the corresponding porting code, different porting codes can only recognize programming files in a fixed format (for example: the porting code JAM PLAYER can recognize programming files in the format of .jbc, but not in the format of .vme), different formats The programming files are incompatible with each other, and the programming process is complicated.

Contents of the invention

The object of the present invention is to propose a method and device for online programming of logic devices, which can effectively solve the defect in the prior art that different JTAG chains occupy too many physical resources and cause complex layout and wiring of the system single board. At the same time, it can also effectively solve the defect in the prior art that the programming process is complicated due to many programming files.

In order to achieve the above object, the present invention provides a method for online programming of logic devices, comprising: forming a JTAG chain with logic devices from different manufacturers or from different and same manufacturers;

Generate a chained programming file in a serial vector format that includes the position information of each logic device of the JTAG chain, the JTAG instruction register length information, and the programming content of each logic device or generate the position information that includes each logic device of the JTAG chain, JTAG Instruction register length information and several different formats of chained programming files of the same manufacturer's logic device programming content on the JTAG chain or generate a single programming file including each logic device programming content of the JTAG chain and JTAG instruction register length information;

In-circuit programming of any logic device on the JTAG chain.

On-line programming of any logic device on the JTAG chain includes: parsing the chained programming file in a serial vector format, obtaining the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and each Logic device programming content, online programming of each logic device on the JTAG chain; analyze the chained programming files in several different formats, and obtain the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and each logic device. Device programming content, perform online programming for each logic device on the JTAG chain or call its corresponding transplant code separately, and perform online programming for each logic device on the JTAG chain.

In the above-mentioned technical solution, generating a chained programming file in a serial vector format that includes the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register, and the programming content of each logic device includes: respectively generating a programming file containing a single logic device on the JTAG chain. A single serial vector format programming file with content and JTAG instruction register length information; according to each single serial vector format programming file and the position of each logic device on the JTAG chain, use any manufacturer's programming tool to generate or program each single device Manually edit the programming file to generate a chained programming file in serial vector format.

The online programming of each logic device on the JTAG chain may include: processing instructions according to the position information of each logic device on the JTAG chain and the length information of the JTAG instruction register, selecting the programming state of the logic device to be programmed, and adding the programming content to the Logic devices that need to be programmed.

In order to achieve the above object, the present invention also provides a device for on-line programming of logic devices, including: an acquisition module connected with the programming module for obtaining position information of each logic device on the JTAG chain, JTAG instruction register length information and the same manufacturer A chained programming file in several different formats of logic device programming content or a chained programming file in serial vector format containing the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register, and the programming content of each logic device; the programming module, It is connected with the acquisition module, and is used for parsing the chained programming file, and using the chained programming file to perform online programming on any logic device on the JTAG chain.

The programming module includes: an interface module, which is connected with the analysis module, reads in the chain programming file, controls the JTAG interface of the programmable device, and performs programming operations; the analysis module is connected with the interface module, and analyzes the logic device according to the obtained chain programming file Location information, JTAG instruction register length information and programming content of each logic device; and when a logic device is programmed online, the analysis result is transmitted to the interface module. The programming module can also include: a calling module, connected with the interface module, used for chain programming in different formats including the location information of each logic device on the JTAG chain, the length information of the JTAG instruction register and the programming content of the logic device of the same manufacturer obtained according to the interface module The file calls the corresponding porting code, and transfers the programming content to the interface module.

The parsing module may further include: a verification sub-module, connected to the format parsing sub-module, to verify the chained programming file, and send the chained programming file to the format parsing sub-module when the verification is passed; the format parsing sub-module, Connect with the check sub-module and the storage sub-module, analyze the chained programming file according to the format of the chained programming file, and obtain the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and the programming data of each logic device Content; the storage sub-module is connected with the format analysis sub-module, and stores the analyzed programming data content of each logic device.

The invention provides a method and device for online programming of logic devices of different manufacturers on a JTAG chain. For a JTAG chain formed by logic devices from different manufacturers, generate a chained programming file in different formats that only contains the programming content of the logic device from the same manufacturer or a chained programming file in serial vector format that contains all the programming content of the logic device, and use The generated chain programming file can perform in-circuit programming for all logic devices on the JTAG chain. The invention enhances the flexibility of logic device programming, reduces the cost of document management, occupies less physical resources, and greatly simplifies the complexity of online programming of logic devices when multiple logic devices from different manufacturers form a JTAG chain. Perform online programming for each logic device through analysis, without the private protection of the manufacturer's transplanted code, and effectively solve the problem that different JTAG chains occupy too many physical resources in the prior art, which leads to complex layout and wiring of the system single board and complicated programming process caused by many programming files. Defects, suitable for embedded programming, remote upgrade and maintenance.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Figure 1 is a block diagram of different JTAG programming chains composed of logic devices from different manufacturers;

Fig. 2 forms a JTAG programming chain embodiment block diagram for logic device among the present invention;

3 is a flow chart of Embodiment 1 of a method for online programming of a logic device of the present invention;

FIG. 4 is a flow chart of Embodiment 2 of the method for online programming of logic devices according to the present invention;

Fig. 5 is that in Fig. 4, the chained programming files of different formats generated are parsed to obtain a flow chart of an embodiment of the programming content of the logic device;

FIG. 6 is a flow chart of Embodiment 3 of the method for online programming of logic devices according to the present invention;

Fig. 7 is the flowchart of step 1 embodiment in Fig. 6;

Fig. 8 is that the present invention carries out online programming embodiment one flow chart to a logic device on the JTAG chain;

Fig. 9 is a schematic diagram of the analysis of the embodiment of Fig. 8;

Fig. 10 is the flow chart of the present invention carrying out online programming embodiment 2 to a logic device on the JTAG chain;

FIG. 11 is a schematic diagram of Embodiment 1 of an apparatus for in-circuit programming of logic devices according to the present invention;

Fig. 12 is a schematic diagram of an embodiment of the internal structure of the programming module of the present invention;

FIG. 13 is a schematic diagram of Embodiment 2 of an apparatus for in-circuit programming of logic devices according to the present invention.

Detailed ways

Fig. 2 is a block diagram of an embodiment of logic devices forming a JTAG programming chain in the present invention. As shown in FIG. 2 , logic devices 1-8 of different and/or same types of manufacturers form a JTAG chain for online programming. The present invention mainly forms each logic device of different and/or the same manufacturer into a JTAG chain, and performs online programming for each logic device on the JTAG chain.

After each logic device is formed into a JTAG chain, each logic device can be programmed online in four ways:

The first kind of online programming method generates a single programming file containing the position information of each logic device on the JTAG chain, the length of the JTAG instruction register and the programming content of a single logic device on the JTAG chain respectively; each of the single programming files calls the corresponding transplant code respectively, In-circuit programming of corresponding logic devices;

Figure 2 includes 8 logic devices, assuming that logic device 1 is a device of ALTERA company, and logic device 3 is a device of LATTICE; then the 1.pof programming file corresponding to logic device 1 needs to call the programming tool of ALTERA company to generate the transplant code JAMPLAYER recognition A single programming file in the format of .jbc (including the location information of each logic device on the JTAG chain, the length of the JTAG instruction register and the programming content of logic device 1 on the JTAG chain), similarly, the 3.jed programming file corresponding to logic device 3 needs to be called The programming tool of LATTICE Company generates a single programming file in the form of .vme recognized by the porting code ispVMEmdedded (including the location information of each logic device on the JTAG chain, the length of the JTAG instruction register and the programming content of the logic device 3 on the JTAG chain). This programming method needs to generate eight programming files corresponding to the device, and load the generated programming file containing the programming content of a single device into the corresponding logic device by calling the transplant code of different manufacturers.

In the second online programming method, programming tools from different manufacturers on the JTAG chain generate several chained programming files in different formats; The programming content of logic devices of the same manufacturer; each chained programming file calls the corresponding transplant code respectively, and performs online programming for each logic device on the JTAG chain;

As shown in Figure 3, it is the flow chart of the second online programming method:

Step 1': Logic devices from different manufacturers on the JTAG chain use manufacturer tools to generate several chained programming files in different formats; the chained programming files include position information of each logic device on the JTAG chain, the length of the JTAG instruction register and the The programming content and location information of logic devices from the same manufacturer;

Step 2': The chained programming files in different formats call the corresponding transplantation codes respectively, and perform online programming on the corresponding logic devices on the JTAG chain.

The process of the second online programming mode is now described with an example in conjunction with Figure 2:

In a JTAG chain as shown in Figure 2, logic devices 1 and 3 are devices of ALTERA Company, and logic devices 2 and 4 are devices of LATTICE Company; the programming process is described below:

a) Generate a single programming file containing the programming content of a single device respectively. For example, logic devices 1 and 3 use the programming tool of ALTERA company to generate a single programming file 1.pof and 3.pof in the corresponding format; logic devices 2 and 4 use the programming tool of LATTICE company to generate a single programming file 2.jed in the corresponding format respectively 、 4. jed;

b) Generate a chained programming file in .jbc format containing the location information of each logic device on the JTAG chain, the length of the JTAG instruction register and the programming content of logic devices 1 and 3, and generate the location information of each logic device on the JTAG chain, the length of the JTAG instruction register A chained programming file in .vme format with the programming content of logic devices 2 and 4;

1.pof, 3.pof A single programming file needs to call the programming tool of ALTERA company to generate the transplant code JAMPLAYER recognizes the format as a chained programming file of .jbc (only contains the programming content of devices 1 and 3 and the positions of each logic device on the JTAG chain , JTAG instruction register length information), similarly, the 2.jed and 4.jed single programming files corresponding to logic devices 2 and 4 need to call the programming tool of LATTICE company to generate the transplantation code. Including the programming content of devices 2 and 4, the location information of each logic device on the JTAG chain, and the length information of the JTAG instruction register);

c) The chained programming files in various formats call the corresponding transplant codes respectively, and perform online programming on the logic devices on the JTAG chain:

The chained programming file in .jbc format that only contains the location information of each logic device on the JTAG chain, the length of the JTAG instruction register, and the programming content information of devices 1 and 3 calls the corresponding transplant code JAMPLAYER to program logic devices 1 and 3 online; only The chained programming file in .vme format, which contains the location information of each logic device on the JTAG chain, the length of the JTAG instruction register, and the programming content of devices 2 and 4, calls the corresponding transplant code ispVMEmdedded to perform online programming of logic devices 2 and 4.

It can be seen from the above that there are several different manufacturers in a JTAG chain, and several chained programming files containing only the programming content of logic devices of the same manufacturer need to be generated, and the generated chained programming files are loaded to the corresponding in logic devices.

In the third online programming mode, logic devices of different manufacturers on the JTAG chain utilize manufacturer tools to generate several chained programming files in different formats; The programming content of logic devices from the same manufacturer on the JTAG chain; analyze the generated chained programming files in different formats, obtain the programming content of each logic device on the JTAG chain, and perform online programming on each logic device on the JTAG chain;

As shown in Figure 4, it is the flow chart of the third online programming method:

Step 1": Use the programming tools of different manufacturers on the JTAG chain to generate several chained programming files in different formats;

Step 2": Analyze the generated chained programming files in different formats, obtain the programming content of the corresponding logic device, and perform online programming on the corresponding logic device on the JTAG chain.

The specific generation process of using the programming tools of different manufacturers on the JTAG chain to generate several chained programming files in different formats can refer to the description of parts a) and b) in the second online programming mode.

The generated chained programming files in different formats are analyzed below to obtain the programming content of the corresponding logic device. See Figure 5. The programming content of the corresponding logic device obtained by parsing the chained programming file includes:

Step 21: According to the format of the chained programming file, perform the cyclic redundancy (CRC) check of the corresponding format; such as: the input chained programming file format is .jbc, then execute the corresponding check of the jbc format, jbc_crc_check;

Step 22: Determine whether the cyclic redundancy check is correct, and when the cyclic redundancy check is correct, perform step 23; otherwise, end;

Step 23: According to the format of the chained programming file, analyze the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and the programming content of the corresponding logic device.

After generating the described chain programming file, according to the format of each chain programming file (. content, etc., to complete the loading and programming of the logic devices on the JTAG chain.

Specifically: after obtaining the chained programming file, perform parsing of the corresponding format according to the format of the chained programming file, such as .jbc format and vme format. Each format of the chained programming file will store fixed information in a fixed location. Table 1 shows the format of the chained programming file in the .jbc format:

Table 1 Format table of chained programming files in .jbc format

The above table is just a simple analysis of the format of the .jbc file, and the left column is marked with the address. First_word (4A414D01) is fixed, and it may be 4A414D00. If there are these two values in the first address of a chained programming file, it can be parsed as a chained programming file in .jbc format, and it is used by the QUARTUS programming tool generate. The following action_table, procdure_table, string_table, etc. store the addresses of variables. These variables are in the form of pointers, and the corresponding information values are retrieved from the corresponding positions of the chained programming files according to the addresses pointed by the pointers. Therefore, the chained programming file in the .jbc format is basically composed according to an arrangement structure of such pointers, including all useful information. According to the chained programming file in this format, after reading the corresponding information at the corresponding position, the file format, version information, compilation tools, location information of each logic device on the JTAG chain, and programming data content of the corresponding logic device will be obtained. .

In step 22 of this embodiment, if the format of the chained programming file is .jbc format, the executed jbc_crc_check verification result is compared with the cyclic redundancy data Crc_section in the chained programming file, such as the 0x28-0x2b position in Table 1 where the cycle is stored Redundant data Crc_section provides accuracy guarantee for subsequent analysis and online programming. Other such as. Although the data storage location and the meaning of the data in each location are different between the chained programming files in the vme format and the chained programming files in the .jbc format, only the storage formats are different, and the parsing process is similar, so I won’t give examples here. .

After analyzing the programming content of the chained programming files in different formats, the location information of each logic device, the length of the JTAG instruction, and the programming content of each logic device are obtained, and then each logic device is programmed online, and the logic device will be programmed later. The loading process is described in detail.

The fourth online programming method is to generate a chained programming file in serial vector format containing information of all logic devices on the JTAG chain, and use the chained programming file to perform online programming on any logic device on the JTAG chain.

The fourth method for in-circuit programming of logic devices will be described below with reference to FIG. 2 and FIG. 6 .

FIG. 6 is a flow chart of Embodiment 3 of the method for in-circuit programming of a logic device according to the present invention. As shown in Figure 6, this embodiment includes:

Step 1: Generate a chained programming file in a serial vector format that includes the position information of each logic device on a JTAG chain, the length of the JTAG instruction register, and the programming content of each logic device;

Step 2: Analyze the chained programming file, obtain the programming content of each logic device, and perform online programming for each logic device on the JTAG chain.

Step 1 of this embodiment needs to generate a chained programming file, which includes the programming content of all logic devices from different or the same manufacturers on a JTAG chain, the length and location information of the JTAG instruction register, and the like. Refer to Figure 7 for the process of generating a chained programming file that meets the requirements in step 1, including:

Step 11: Generate a programming file in a single serial vector format that includes the programming content of a single logic device on the JTAG chain and the length of the JTAG instruction register;

Step 12: According to the above-mentioned single programming file in serial vector format and the position of each logic device on the JTAG chain, use any programming tool to generate or manually edit each single programming file to generate a chained programming file in serial vector format.

Below in conjunction with Figure 2, the generation process of the serial vector format into a chain programming file is illustrated: for example, 1 and 3 in Figure 2 are devices of ALTERA Company, and 2 and 4 are devices of LATTICE Company; generate a program containing logic devices 1-4 The chained programming files in serial vector format include:

a) Generate a single programming file containing the programming content of a single device and the length of the JTAG instruction register respectively. For example, logic devices 1 and 3 use the programming tool of ALTERA company to generate a single programming file 1.pof and 3.pof in the corresponding format; logic devices 2 and 4 use the programming tool of LATTICE company to generate a single programming file 2.jed in the corresponding format respectively 、 4. jed;

b) To generate a chained programming file from individual programming files of different formats for each logic device on the JTAG chain, it is necessary to first generate a programming file in serial vector format from a single programming file in different formats, such as: use the programming tool of LATTICE company to 2.jed and 4.jed are converted into serial vector format (Serial Vector Format, abbreviated as svf) programming files 2.svf, 4.svf. The serial vector format is a file format that can be generated by different programming tools, and all logic devices support programming files in this format;

c) Use any programming tool, such as: LATTICE's programming tool ispVM, to generate 4 single programming files in serial vector format into a chained programming file containing device 1-4 serial vector format, or program each individual Manual editing of the file generates a chained programming file containing devices 1-4 in serial vector format:

Use the chain editing function of the programming tool to generate a chained programming file in serial vector format from four single programming files in serial vector format according to the position of the logic devices, or according to the position order of each logic device on the JTAG chain , manually editing and merging individual serial vector format programming files to generate a chained programming file in serial vector format.

Therefore, any programming tool or manual editing can be used to generate a chained programming file in serial vector format, which includes the position of each logic device on the JTAG chain, programming content and the length of the JTAG instruction register. After generating a chained programming file in serial vector format, the chained programming file is analyzed to obtain the programming content of each logic device, and then online programming is performed on any logic device on the JTAG chain.

The serial vector format defines a set of syntax to describe the scanning sequence and process of JTAG instructions and data, as well as the content of instructions and data, and is a descriptive language for JTAG channel link actions. Different from the chained programming files in .jbc or .vme format (as listed in Table 1, the chained programming files in .jbc format are binary codes that are difficult to read), and the files in serial vector format are similar to The readability of the C language file is relatively high. The content of the chained programming file in this format is readable, and can even be edited as needed, from which the programming instructions, data content and location information of each logic device can be directly analyzed. After obtaining the information of each logic device, load the corresponding programming content to each logic device.

The first and second online programming methods need to generate several single programming files or chained programming files; and call the corresponding transplanted codes to perform online programming on each logic device on the JTAG chain. These two programming methods and programming The process is relatively simple, but it is limited by the codes transplanted by various manufacturers; the third online programming method also needs to generate several chained programming files in different formats, but the subsequent programming does not call the factory’s transplanted codes, and the generated chained programming files in different formats The programming file is analyzed, and the manufacturer’s private protection of the transplanted code is released; the fourth online programming method also realizes online programming of logic devices on a JTAG chain, generates a chained programming file in serial vector format, and The analysis of the chained programming file in the serial vector format can complete the loading and programming of all logic devices with one chained programming file.

In the third and fourth online programming methods, after analyzing the chained programming file to obtain the programming content, instruction length and location information of each logic device, the online programming of each logic device on the JTAG chain can be performed, as shown in Figure 8. In-circuit programming of each logic device on the JTAG chain includes:

Step 31: Process the instruction according to the location information of each logic device and the length of the JTAG instruction register, and select the programming state of the logic device to be programmed;

Step 32: Add data content to the logic device to be programmed.

In step 31, according to the position information of each logic device and the length of the JTAG instruction register, the programming instructions are sent to the logic devices that need to be programmed, and the bypass instructions are sent to the logic devices that do not need to be programmed, and the instructions to each logic device are sent in sequence according to the position. The logic device to be programmed selects the programming state.

Fig. 9 is a schematic analysis diagram of the embodiment in Fig. 8 . As shown in Figure 9, three devices form a JTAG chain, input data from the test data input (Test Data Input, referred to as TDI) port, and output data from the test data output (Test Data Output, referred to as TDO) port. Program device 2, assuming that the length of the JTAG instruction register of device 1 is 6 after parsing the chained programming file; the length of the JTAG instruction register of device 3 is 8; the length of the JTAG instruction register of device 2 is 10. The binary instruction is "0000010010". When programming device 2, the in-circuit programming (ISC_PROGRAM) instruction needs to be sent to the instruction register of device 2, and both devices 1 and 3 need to be bypassed (according to the IEEE1149.1 standard, the bypass instructions are all "1"), so in Scan instruction cycle, the binary instruction sent from TDI should be "111111000001001011111111", a total of 24 bits. The command received by device 1 is "111111", the command received by device 2 is "0000010010", and the command received by device 3 is "11111111". Devices 1 and 3 perform bypass operations, device 2 starts to perform in-circuit programming operations, programming data content is sent from TDI to device 2, and devices 1 and 3 are in a bypass state.

In the same way, the process of adding programming content to logic devices that need to be programmed is as follows: send bypass data to logic devices that do not need programming (according to IEEE 1149.1 and IEEE 1532 standards, just send a bit "0" for bypass data). For the logic device that needs to be programmed, the data content of the logic device is serially transferred into the device through the TDI port of the JTAG interface to obtain the programming content. For example, the programming data of device 2 is 97-bit "****....**", a total of 97-bit data, when writing programming content to device 2, the programming content needs to be sent to the data register of device 2, and the device Both 1 and 3 need to be bypassed (only one "0" needs to be sent), so the binary data sent from TDI should be "0****....**0", a total of 99 bits, the device 1 and device 3 are data bypassed, only device 2 receives 97 bits of programming data. The specific operation refers to the IEEE1149.1 and IEEE 1532 standards. In the IEEE1149.1 standard specification, the serial shift and bypass operations are specified, and will not be described in detail here.

FIG. 10 is a flow chart of Embodiment 2 of in-circuit programming of a logic device on the JTAG chain according to the present invention. When generating a chained programming file in a serial vector format containing the position information of each logic device on the JTAG chain, the length of the JTAG instruction register, and the programming content of each logic device, or generating the position information of each logic device on the JTAG chain, the length of the JTAG instruction register and After several chained programming files of different formats for the same manufacturer’s logic device programming content, the position, programming data, and instruction length of each logic device on the JTAG chain are obtained by analyzing the chained programming file. When a logic device is programmed, it includes:

Step 310: call the JTAG control function, so that the entire JTAG chain is in the programming state;

Step 311: Process the programming instruction, and replace the non-programming device with a bypass instruction;

Step 312: Outputting additional instructions to select logic devices to be programmed;

Step 32: output programming data, and perform programming;

Step 4: Verify the programming data read by the serial shift of the logic device, and judge whether it is correct, and then end, otherwise judge whether it exceeds the preset number of times, which is set to 3 times in this embodiment, if not more than 3 times Then execute step 310 to reprogram, otherwise end, indicating programming failure.

After online programming of a certain logic device, check the programming data read out by the serial shift of the logic device, and judge whether the programmed data content is consistent with the data content to be loaded, so as to ensure the accuracy of online loading of the logic device .

FIG. 11 is a schematic diagram of Embodiment 1 of an apparatus for in-circuit programming of a logic device according to the present invention. As shown in Figure 10, this embodiment includes:

Obtaining module 1, connected with programming module 2, used to obtain chained programming files in different formats including the location information of each logic device on the JTAG chain, the length of the JTAG instruction register, and the programming content of the same manufacturer's logic devices or including all logic devices on the JTAG chain Linked programming files in serial vector format for location information, JTAG instruction register length, and logic device programming content;

The programming module 2 is connected with the obtaining module 1, and is used for parsing the chain programming file, obtaining the programming content of each logic device and performing online programming for any logic device on the JTAG chain.

The embodiment of Fig. 11 is the device for realizing the online programming method of logic devices in the present invention, which can be implemented on a JTAG chain, and use a chained programming file to carry out online programming of logic devices of different manufacturers on the JTAG chain, which enhances the logic device programming. Flexibility, occupies less physical resources, reduces document management cost and programming complexity.

Fig. 12 is a schematic diagram of an embodiment of the internal structure of the programming module of the present invention. As shown in Figure 12, in this embodiment, the programming module includes:

The interface module 21 is connected with the parsing module 22, reads in the chain programming file, controls the JTAG interface of the logic device, and completes the programming operation; the interface module 21 is connected with the JTAG interface of the programmable device to output and control the programming data content;

Analysis module 22 is connected with interface module 21, and analyzes the programming content of each logic device according to the obtained chain programming file; and when a certain logic device is programmed online, the analysis result is imported into interface module 21; analysis module 22 further includes:

Checking sub-module 221, connected with format analysis sub-module 222, checks the chained programming file, and passes the chained programming file into the format analysis sub-module 222;

The format parsing submodule 222 is connected with the verification submodule 221 and the storage submodule 223, and analyzes the chain programming file according to the format of the chain programming file to obtain the position information of each logic device on the JTAG chain and the length of the JTAG instruction register Information and data content of each logic device programming;

The storage sub-module 223 is connected with the format analysis sub-module 222 and stores the analyzed data content programmed by each logic device.

In this embodiment, the verification sub-module can verify the chained programming file, which increases the accuracy; the format analysis module can perform corresponding analysis according to different formats of the chained programming file, and the specific operation can refer to the method embodiment of the present invention. illustrate.

In Fig. 12 embodiment, described programming module can also comprise: call module 23, be connected with interface module 21, be used to comprise each logic device location information on the JTAG chain, JTAG instruction register length and the logic device of the same manufacturer according to interface module acquisition The chained programming files in different formats of the programming content call the corresponding transplant code, and transfer the programming content to the interface module 21 .

After generating a chained programming file that only contains the programming content of the same manufacturer's logic device, you can call the manufacturer's ported code to program the chained logic device online, or analyze the chained programming file in different formats, and then perform on-chain logic The device is programmed online, so the programming module can include the analysis module or the calling module, or both, so as to realize a flexible programming method.

FIG. 13 is a schematic diagram of Embodiment 2 of an apparatus for in-circuit programming of logic devices according to the present invention. The internal structure of the analysis module in Fig. 13 is similar to that of Fig. 12, and the difference is that the analysis module also includes: a data processing sub-module 224, connected with the storage sub-module 223, and programming instructions according to each logic device position information, JTAG instruction register length or data, and send the processed instruction or data to the interface module 21. Other specific functional modules that are the same as those in Fig. 12 will not be described in detail.

The embodiments of the present invention form a JTAG chain for logic devices of different manufacturers, without transplanting the programming codes provided by different manufacturers, the logic devices on the JTAG chain can be programmed online, which enhances the flexibility of logic device programming; can generate a A chained programming file in serial vector format that contains all logic device information, uses a chained programming file to program logic devices, reduces the cost of document management, occupies less physical resources, and greatly simplifies multiple The complexity of online programming of logic devices when logic devices are chained is especially suitable for embedded programming, remote upgrades and maintenance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention without limitation, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (16)

1. a method for logic device online programming, is characterized in that, comprises: Form a JTAG chain of logic devices from different manufacturers or different and same manufacturers; Generate a chained programming file in a serial vector format that includes the position information of each logic device of the JTAG chain, the JTAG instruction register length information, and the programming content of each logic device or generate the position information that includes each logic device of the JTAG chain, JTAG Instruction register length information and several different formats of chained programming files of the same manufacturer’s logic device programming content on the JTAG chain or respectively generate the position information of each logic device on the JTAG chain, the JTAG instruction register length information and the single logic on the JTAG chain. A single programming file for device programming content; in-circuit programming of any logic device on the JTAG chain. 2. the method for logic device in-circuit programming according to claim 1, is characterized in that, described in-line programming comprises to any logic device on the described JTAG chain: Analyzing the chained programming file in the serial vector format to obtain the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and the programming content of each logic device; In-circuit programming of each logic device on the JTAG chain. 3. the method for logic device in-circuit programming according to claim 1, is characterized in that, described in-line programming comprises to any logic device on the described JTAG chain: Analyze the chained programming files in several different formats, obtain the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and the programming content of each logic device, and perform online programming on each logic device on the JTAG chain. 4. the method for logic device in-circuit programming according to claim 1, is characterized in that, described in-line programming comprises to any logic device on the described JTAG chain: Call the corresponding porting codes for the chained programming files in several different formats, and perform online programming for each logic device on the JTAG chain. 5. the method for logic device in-circuit programming according to claim 1, is characterized in that, described in-line programming comprises to any logic device on the described JTAG chain: Call the transplant code corresponding to each individual programming file, and perform online programming on each logic device on the JTAG chain. 6. the method for logic device in-circuit programming according to claim 2, is characterized in that, described generation comprises each logic device location information of described JTAG chain, JTAG instruction register length information and each logic device programming content a serial vector Formatted chained programming files include: Generate a programming file in a single serial vector format containing the programming content of a single logic device on the JTAG chain and the length information of the JTAG instruction register; According to each programming file in serial vector format and the position of each logic device on the JTAG chain, use any programming tool to generate or manually edit each programming file in serial vector format to generate a chained programming file in serial vector format . 7. the method for logic device on-line programming according to claim 3 is characterized in that, described described several different formats chain programming files are analyzed, obtain the positional information of each logic device on the JTAG chain, JTAG instruction Register length information and programming content of each logic device include: According to the format of the chained programming files in several different formats, perform the cyclic redundancy check of the corresponding format; Judging whether the cyclic redundancy check is correct, when the check is correct, execute the parsing of the corresponding formats of the chained programming files in several different formats to obtain the position information of each logic device on the JTAG chain, the length of the JTAG instruction register Information and programming content of each logic device. 8. according to the method for the logic device online programming described in claim 2,3 or 6, it is characterized in that, described each logic device on the JTAG chain is carried out online programming comprises: According to the position information of each logic device on the JTAG chain and the length information of the JTAG instruction register, the instructions are processed, the programming state of the logic device to be programmed is selected, and the programming content is added to the logic device to be programmed. 9. the method for logic device in-circuit programming according to claim 8, is characterized in that, described according to the position information of each logic device on the JTAG chain, JTAG instruction register length information instructions are processed, will need the logic device of programming The selected programming states are: According to the position information of each logic device on the JTAG chain and the length information of the JTAG instruction register, programming instructions are sent to logic devices that need to be programmed, and bypass instructions are sent to logic devices that do not need programming, and the instructions to each logic device are sent sequentially according to their positions. 10. the method for logic device online programming according to claim 9, is characterized in that, described programming content is added to the logic device that needs programming to be: Send bypass data to logic devices that do not need programming, send programming data to logic devices that need programming, and send the data content of each logic device in sequence according to the position. 11. according to the method for the logic device online programming described in claim 2,3,6,9 or 10, it is characterized in that, after described any logic device on the JTAG chain is carried out online programming, also comprise: Verify the programming content of the logic device for online programming, and judge whether the verification is correct. When the verification fails and is less than the preset number of times, perform online programming for the logic device again. 12. A device for online programming of logic devices, characterized in that, comprising: The acquisition module is connected with the programming module, and is used to obtain chained programming files in several different formats including the location information of each logic device on the JTAG chain, the length information of the JTAG instruction register, and the programming content of the logic device of the same manufacturer, or include each logic on the JTAG chain Device position information, JTAG instruction register length information and serial vector format chained programming files of each logic device programming content; The programming module is connected with the acquisition module, and is used for parsing into a chain programming file, and performing online programming for any logic device on the JTAG chain. 13. the device of logic device online programming according to claim 12, is characterized in that, described programming module comprises: The interface module is connected with the analysis module, reads into the chain programming file, controls the JTAG interface of the logic device, and executes the programming operation; The analysis module is connected with the interface module, and analyzes the position information of the logic device, the length information of the JTAG instruction register and the programming content of each logic device according to the obtained chained programming file; and transmits the analysis result to the interface when performing online programming of a certain logic device module. 14. the device of logic device online programming according to claim 13, is characterized in that, described programming module further comprises: The calling module is connected with the interface module, and is used to call the corresponding porting code according to the chain programming files in different formats including the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register, and the programming content of the logic device of the same manufacturer obtained by the interface module , transfer the programming content to the interface module. 15. according to the device of claim 13 or 14 described logic device online programming, it is characterized in that, described parsing module comprises: The verification sub-module is connected with the format analysis sub-module to verify the chained programming file, and when the verification is passed, the chained programming file is sent to the format analysis sub-module; The format parsing sub-module is connected with the verification sub-module and the storage sub-module. According to the format of the chain programming file, the chain programming file is analyzed to obtain the position information of each logic device on the JTAG chain, the length information of the JTAG instruction register and each programming content of logic devices; The storage sub-module is connected with the format parsing sub-module, and stores the parsed programming content of each logic device. 16. the device of logic device online programming according to claim 15, is characterized in that, described parsing module further comprises: The data processing sub-module is connected with the storage sub-module, processes the programming instructions or data according to the location information of each logic device and the length information of the JTAG instruction register, and sends the processed instructions or data to the interface module.

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