WO2008098426A1

WO2008098426A1 - Hand held single chip microcomputer programmer

Info

Publication number: WO2008098426A1
Application number: PCT/CN2007/000798
Authority: WO
Inventors: Fangrui Mou; Hongkai Ge
Original assignee: Shenzhen Secom Telecom Co., Ltd
Priority date: 2007-02-15
Filing date: 2007-03-13
Publication date: 2008-08-21
Also published as: CN201060402Y

Abstract

A hand held single chip microcomputer programmer is provided, and includes a programmer body and a programmer handlebody. The programmer body includes a voltage stabilizing circuit, a CPU central control unit, a communication interface and a programming interface which are connected with the CPU central control unit, the programmer handlebody includes socket for connecting with the programming interface and a plurality of spring pins for connecting with a object board, in which, the programmer body also comprises a password protecting module and an encryption/decryption module, the password protecting module limits the times of programming, the encryption/decryption module encrypts and decrypts the programming file, the spring pins includes a long pin connected with ground wire of the object board firstly. The programmer has advantages of encrypting/decrypting the programming file and limiting the number of programming, without the computer being concerned during programming, with flexible programming interface, providing many power supply modes, convenient for usage and suitable for bulk programming.

Description

Handheld microcontroller programmer

Technical field

This invention relates to programmers and, more particularly, to a handheld microcontroller (MCU) programmer. Background technique

With its simple structure, flexible use and easy to master, MCU has been widely promoted in the fields of industrial control, consumer electronics and communication. However, with the large-scale use of single-chip microcomputers, more and more users are troubled by the large-volume programming problems of single-chip microcomputers. At present, there are two main methods for batch programming of single-chip microcomputers. One is to program from the system, that is, to program the microcontroller with a programmer and then solder it to the target board. As far as this programming method is concerned, it has the following disadvantages: It is not conducive to the update of the microcontroller program; the existing programmer is expensive and bulky. The other is to program in the system, that is, after installing the microcontroller on the target board. As far as this programming method is concerned, it also has the following disadvantages: The participation of the computer is required in the programming process; the special software needs to be installed on the computer; the programming header structure is fixed, and cannot be flexibly used; the above disadvantages make the mass production programming of the single chip extremely inconvenient, affecting the product production progress. Summary of the invention

The invention solves the problems that the prior programmer batch programming is inconvenient, bulky, requires computer participation in the programming process, and needs to install special software on the computer, and provides a small size, low cost, password protection function and encryption and decryption function. Independently programmable programmer.

The technical solution of the present invention is to construct a handheld MCU programmer, comprising a programmer body and a programmer handle body, the programmer body comprising a voltage stabilization circuit, a CPU main control unit, and a communication interface connected with the CPU main control unit And a programming interface, the programmer handle body includes a socket for connecting the programming interface and a plurality of pogo pins for connecting the target board, wherein:

The programmer body further includes a password protection module and an encryption and decryption module, and the password protection The module is for limiting the number of programming, the encryption and decryption module is for encrypting and decrypting the programming file; the plurality of pogo pins includes a long needle for the ground wire that first contacts the target board.

In the present invention, a programming interface selection circuit is further included, and the programming interface selection circuit cooperates with the programming interface to implement switching of a programming interface type.

In the present invention, the DIP dial switch is used to control the programming interface selection circuit.

In the present invention, the plurality of pogo pins are plug-in spring pins, which can be inserted into a double row ten needle, a single row five needle or a single row three needle.

In the present invention, the power supply mode selection circuit is further included, and the power supply mode selection circuit cooperates with the voltage stabilization circuit to switch the power supply mode.

In the present invention, the input end of the voltage stabilizing circuit is connected to an external power source or an internal battery, and the output terminal supplies power to the programmer body.

In the present invention, the input end of the voltage stabilizing circuit is connected to an external power source or an internal battery, and the output terminal supplies power to the programmer body and the target board.

In the present invention, the target board supplies power to the programmer body.

In the present invention, the power supply mode selection circuit is controlled using a DIP dial switch.

In the present invention, the programmer body further includes a program mode selection module for switching between a manual programming mode and an automatic programming mode. ·

In the present invention, the programmer body further includes a programming button and a reset button connected to the CPU main control unit, the programming button is used for manual programming, and the reset button circuit is used for resetting the CPU main control unit.

In the present invention, the programmer body further includes the program content selection circuit, and the program content includes a program target board and an erase target board.

In the present invention, the programming content selection circuit is controlled using a DIP dial switch.

In the present invention, the programming interface of the programmer body is connected to a flat cable, and the other end of the flat cable is used to connect a socket or a target board of the programmer handle.

In the present invention, the programmer body further includes an indication and alarm circuit for indicating the working state of the programmer, the indication and alarm circuit includes two LED lights and a buzzer, wherein one LED is used for indicating During the programming process, another LED light is used in conjunction with the buzzer to indicate if the programming was successful.

In the present invention, the programming interface further includes a protection circuit, and the protection circuit can realize the instant State suppression protection and overcurrent protection.

In the present invention, the communication interface is an RS232 serial interface, the CPU main control unit uses a single chip C8051F123, the programming interface is a switchable C2/JTAG interface, and the programmer body is connected to a computer through a communication interface circuit. To initialize.

According to the above technical solution, the programmer of the present invention has an encryption and decryption module and a password protection module, which can encrypt and decrypt the programming file and limit the number of programming; the target board is programmed by the programmer handle body, and the target board of the plurality of interfaces is supported; It is carried out through the computer's HyperTerminal at the time of initialization. It does not need to install special software on the computer. It does not require the participation of the computer during the programming process, and is convenient to use and suitable for mass programming.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further described with reference to the accompanying drawings and embodiments in which:

m 1 is a functional block diagram of a programmer body in a preferred embodiment of the present invention;

2 is a schematic diagram of the appearance of a programmer body in a preferred embodiment of the present invention;

3 is a schematic block diagram of a programmer handle body mated with the programmer body shown in FIG. 1;

4, FIG. 5 is a circuit diagram of a programmer body in a preferred embodiment of the present invention;

Figure 6 is a circuit diagram of a programmer handle in a preferred embodiment of the present invention. DETAILED DESCRIPTION The programmer of the present invention includes a programmer body and a programmer handle. A preferred embodiment of the invention is illustrated in Figures 1 through 6. 1 is a schematic block diagram of the programmer body 10, FIG. 2 is a schematic diagram of the appearance of the programmer body 10, and FIG. 3 is a schematic block diagram of the programmer body 30.

As shown in FIG. 1 and FIG. 2, the programmer body 10 includes a voltage stabilizing circuit 11, a CPU main control unit 12, a communication interface 13, a programming interface 14, a power supply mode selection circuit 15, a programming interface selection circuit 16, and a programming content selection circuit. 17. A password protection module 18, an encryption and decryption module 19, and a programming mode selection module. The communication interface 13 is connected to the CPU main control unit 12 and communicates with the computer; the programming interface 14 is connected to the CPU main control unit 12 to form a programming interface circuit; The protection circuit can realize the transient suppression protection and the overcurrent protection; the power supply mode selection circuit 15 is directly connected to the CPU main control unit 12, and cooperates with the voltage stabilization circuit 11 to realize the switching of the power supply mode; the programming interface selection circuit 16 Directly connected to the CPU main control unit 12, cooperate with the programming interface 14 to realize switching of the programming interface type; the programming content selection circuit 17 is directly connected to the CPU main control unit 12, for selecting a programming target board or erasing a target board; The protection module 18 is used to limit the number of programming, and the encryption and decryption module 19 is used to encrypt and decrypt the programming file. The programming mode selection module is directly connected to the CPU main control unit 12 for switching between the manual programming mode and the automatic programming mode.

The "power supply mode" includes: the voltage stabilizing circuit 11 supplies power to the programmer body 10, and the other power supplies supply power to the hundred standard boards; the voltage stabilizing circuit 11 supplies power to the programmer body 10 and the target board; the target board supplies power to the programmer body 10, For example, the target board powers the programmer body 10 through a programming cable or programmer handle. This kind of power supply method is very flexible to adapt to various power supply situations at the programming site.

The automatic programming mode is to insert the programmer handle body into the target board programming hole to realize programming; the manual programming mode is to connect the programming cable or the programmer handle body to the target board programming interface, and then press the programming button to realize the programming. program.

In this embodiment, the voltage stabilizing circuit 11 is a DC DC+LDO voltage stabilizing circuit, and its input terminal can be connected to an internal battery or connected to an external power source. For example, the voltage stabilizing circuit _: the input end of the 11 can pass the 9V DC. The power input port is connected to an external 220VAC/9VDC power adapter; the output terminal supplies power to the programmer body 10 or simultaneously supplies power to the target board. The CPU main control unit 12 uses a single chip microcomputer C8051F123. The communication interface 13 is an RS232 serial interface that can be used to connect to a computer for initialization. Programming interface 14 is a C2/JTAG programming interface that can be switched to a C2 interface or a JTAG programming interface. The programming interface 14 can be connected to a flat cable and the target board having the corresponding interface can be programmed through the flat cable, or the other end of the flat cable can be connected to the programmer handle 30 (Fig. 3) and then through the programmer handle 30 to the target board. Programming.

In this embodiment, the programmer body 10 can be connected to the computer through the RS232 communication interface 13, and the CPU main control unit 12 has a UART port connected to the RS232 communication interface 13. On the computer, use the HyperTerminal to enter the programmer initialization operation menu to initialize the programmer, no need to install other special software. Initialization includes selecting the target device, erasing the programmer data storage space, receiving the user HEX file, setting the programmer password, setting the programming mode (manual programming or automatic programming), online operation, and so on. The password protection module 18 and the encryption decryption module 19 can be implemented by hardware, firmware or software. For example, at the time of initialization, the user password can be set in the field of receiving the HEX file. The user enters the user's password when using the programmer. The password protection module 18 compares the password input by the user and the password set by the HEX file. If the two are consistent, the user is considered to be an authorized user, and the programmer is allowed to run according to the user password including the programmed quantity, the programming date, the programmer number, and the like. . In addition, the encryption security module 19 is used to encrypt and decrypt user passwords, programming files, etc., to implement the encryption and decryption mode to transfer the programmed file, and to encrypt and decrypt the file in the programmer, thereby enhancing confidentiality. That is to say, the number of programs and the secret programming file can be limited by the password protection module 18 and the encryption/decryption module 19. Some solution providers can take advantage of this feature to protect their own interests.

The programming mode selection module can be implemented in hardware, or software. In this embodiment, the programming mode selection module is implemented in a software manner, and during the initialization process of the programmer, an automatic programming mode or a manual programming mode may be selected through an initialization menu.

The programmer body 10 also includes a programming button 26 and a reset button circuit 25, as shown in FIG. The programming button 26 and the reset button circuit 25 are directly connected to the CPU main control unit 12. The programming button 26 is used for manual programming, and the programming operation is performed once per trigger; the reset button 25 is used to reset the CPU main control unit 12. '

2 is a schematic view of the appearance of the programmer body. It can be seen from the figure that the surface of the casing 20 is provided with a power input port 21 connected to the internal circuit, a power switch 22, a 6-digit DIP switch 23, a programming button 26, and a reset button. 25. LED status indicator 28, power indicator 29 and alarm 24, communication interface 13 and programming interface 14. The DIP switch switch 23 controls the power supply mode selection circuit 15, the programming interface selection circuit 16, and the programming content selection circuit 17. For example, the DIP DIP switch is a 6-digit DIP DIP switch, the 1st and 2nd bits set the power supply mode, the 5th bit selects the target board interface such as C2 or JTAG interface, and the 3rd and 4th bits set the programming target board or erase target. Board, the last reserved bit, with future definitions. For example, the output of the voltage stabilizing circuit 11 can be connected to the first bit of the 6-bit DIP switch, and the target board can supply power to the internal circuit of the programmer, that is, the target board can be programmed by the programming cable or the programmer handle 30. The body 10 is powered.

This embodiment uses two LED status indicators 28 and one alarm 24, one of which is LED The lamp indicates the programming process and flashes at a frequency lower than or equal to 10 Hz during programming. Another LED is used to indicate the programming result. The programming succeeds in flashing at 1Hz. At the same time, the buzzer emits two consecutive "beep"sounds; the programming error flashes at 5Hz, and the buzzer emits a "beep" tone. , lasts 3 seconds. In the specific implementation, the position of the LED, the buzzer and the button can be appropriately adjusted.

3 is a schematic block diagram of a programmer handle 30 that mates with the programmer body of FIG. 1. As can be seen, the programmer handle 30 includes a socket 31 and a plurality of pogo pins 32. The socket 31 can be a double row ten pin socket such as a conventional ten pin socket having a pitch of 2.54 mm, and a programming interface 14 for connecting the programmer body 10, for example, a programming cable 14 via a ten-pin flat cable. The plurality of pogo pins 32 may be a double row ten needle, a single row five needle or a single row three needle or the like. Alternatively, the plurality of pogo pins 32 are plug-in spring pins that can be plugged into a double-row cross, a single-row five-pin or a single-row three-pin programming head, and the flexible programming head can be programmed with a double row of ten Needle interface / single-row five-pin interface / single-row three-pin interface target board.

Preferably, the plurality of pogo pins 32 are long and short needle designs, gp, having a long needle for the ground wire that first contacts the target plate.

As described above, the programmer of this embodiment requires the computer to participate in initialization only before programming, and once the initialization is completed, the participation of the computer is no longer required. By simply setting the DIP switch, the programmer can automatically or manually program the target board either independently or in conjunction with the programmer handle.

4, FIG. 5 is a circuit diagram of the programmer body. As can be seen from FIG. 5, the DC/DC U3 input terminal of the voltage stabilizing circuit is connected to the positive terminal of the 9 VDC power input port P1 and the battery BT1 through the power fuse F4. DC/DC output 5V to the input of LDO U4. The LDO U4 regulates the output 4V, which is stepped down to 3.3V through diode D7 and connected to power switch S4. The other end of the power switch is connected to 3.3V to the internal working power supply of the programmer. This allows the programmer to be powered by a 220VAC/9VDC power adapter or by an internal battery. At the same time, the cathode of the diode D7 is also connected to the bitl bit of the DIP switch S2, and is connected to the working power supply of the target board through the bitl bit. In this way, by setting the bitl bit of the DIP switch S2, the power of the target board can be introduced into the working power of the programmer, so that the target board supplies power to the programmer. Set the bit 2 of the DIP switch S2 to ON, indicating that the target board needs the programmer to supply power. The CPU obtains this flag bit, controls the MOS transistor Q1, and sends the programmer power to the target board working power supply, thereby implementing the programmer to supply power to the target board. The above is the power supply mode of the programmer. As can be seen from Figure 5, in addition to setting the power supply mode, the DIP switch also sets the programming interface, programming content such as programming target board or erasing the target board. Bit5 selects the programming interface, OFF is the C2 interface, and ON is the JTAG interface. After the CPU obtains this pin status, the corresponding software module is selected in the program. Bit3 and bit4 select the programming target board or erase the target board. Pins Pin 8, 9, 10, 11 of the DIP switch are connected to the corresponding 10 ports of CPU U1 in Figure 4, and the CPU performs the corresponding operations through the state of these IOs.

The button S3 in Figure 5 is a manual programming button, and the button change pin is connected to the external interrupt pin in the CPU of Figure 4. Press S3 once to generate an interrupt on the CPU and perform a programming operation. This is the manual programming process. Manual programming or automatic programming is set in the menu when the programmer is initialized by the computer. When automatic programming is selected, the external interrupt is turned off in the program, and the manual change to the button does not work. In Figure 4, the CPU polls the target board in-position signal /C20N (Pin33), and if the target board is in place, the program operation is performed, otherwise it is not executed. This is the automatic programming process. ·.' As can be seen from Figure 4, the CPU is connected to the RS232 level conversion chip U2 in Figure 5 via the 2-wire CPU UART interface (54, 55 'pin), and the U2 is connected to the standard serial port DB9.: Thereby connected to the serial port of the computer, the programmer is initialized on the computer through the HyperTerminal.

As can be seen from Fig. 4, there are 3 LED indicators and buzzer U30. D9 is the working power indicator. Turn on the power switch S4 in Figure 5. When the D9 light is on, the system is working normally. If it is off, the system power is abnormal. D11 is the programming process indicator. During the programming process, the lamp flashes rapidly at a frequency lower than or equal to 10Hz. If the lamp is off, it indicates that the programming process is wrong. The programming is successful. The lamp is always on; D5 is the programming result indicator. This light is always on during programming, programming is successful, this light flashes at 1Hz frequency, programming error, this light flashes at 5Hz frequency. Buzzer U30 uses sound to indicate programming results. The programming is successful, the buzzer emits two consecutive "beep" sounds; the programming error buzzer emits a "beep" sound for 3 seconds. The way to indicate the programming state and programming results by both sound and light is simple and clear. As can be seen from Figure 4, there is a reset button S1, press Sl to reset the CPU, which can restore the programmer abnormality caused by unpredictable conditions.

As can be seen from FIG. 4, the master CPU of the programmer is C8051F123 U1. C8051F123 has a rich 10 ports, and has up to 128KB of Flash Memory inside. Its system working frequency can be Arrived at 100 MIPS. The CPU is connected to the peripheral circuit through 10 ports, obtains the dial setting, controls the power supply mode, connects the RS232 communication interface circuit, and connects the programming interface circuit to realize the core control of all functions of the programmer.

As can be seen from Figure 4, the double-row ten-pin socket JP3 is the programming interface. The standard JTAG signal and C2 signal are defined on JP3. In addition, there are power lines and ground lines. The programmer connects to the target board through this interface to complete the programming work. The standard JTAG signal and C2 signal are provided by the CPU's IO port (pages 33, 34, 35, 36, 37). The signal on pin 3 of JP3 is the in-position signal, and this signal is grounded on the target board. The CPU detects this signal by pin 33 to determine whether the target board is in position. In the automatic programming mode, the CPU also performs automatic programming by polling this signal. In addition, all signals connected to JP3 are protected by a line fuse, a transient suppression diode, and a limiting diode. In this way, the overcurrent and overvoltage signals on the programming port will not cause damage to the main control CPU. '

Double-row ten-pin socket JP3 can be connected to a 10-pin flat cable. The other end of the cable can be connected to a target board with a corresponding interface or a socket to which the programmer handle is connected.

In addition, in the software design of the programmer body described in Fig. 4 and Fig. 5, password protection and encryption and decryption protection are designed for the operation of the programmer. Specifically, the user connects the programmer to the HyperTerminal of the computer and initializes the programmer through the menu options on the HyperTerminal. Initialization includes selecting the target device, erasing the programmer's flash space, receiving user HEX files, and online programming. Among them, the user password is set in the column of receiving HEX file, and the user must input the correct password to receive the HEX file into the programmer. The password protection module can be used to determine if the password entered by the user is correct. The user password contains information such as the number of programming, programming date, programmer number, and so on. That is, the password on each programmer is unique, and the programmer only receives the latest password, and by week, the number of programming is limited by the password. Some solution providers can take advantage of this encryption feature of the programmer to protect their own interests. The encryption security protection module is used to encrypt and decrypt user passwords, programmed files, etc., and increases confidentiality.

Figure 6 is a schematic diagram of a programmer handle mated with the programmer. The socket 31 is a conventional double-row ten-pin socket connected to the programmer programming interface (JP3 in Fig. 4) through a ten-pin flat cable; J1 is a double-row ten-pin pluggable spring pin. The third pin of the spring pin on J1 is a long needle that is connected to the target plate. Ground wire, this ensures that the signal connected to the target board is connected first for hot swapping. The pogo pins can be disassembled into a single row of five needles (leaving 1, 3, 5, 7, 9 needles) and a single row of three needles (leaving 1, 3, 5 needles). Single-row five-pin and single-row three-pin are used to program the C2 interface target board because the C2 interface has only two lines of clock and data. The single-row five-pin and single-row three-pin design saves PCB space on the target board. In addition to the pluggable flexible programming head, the spring pin has another great advantage: the user can automatically program by holding the top of the programmer handle on the target programming hole.

Claims

Rights request

A handheld microcontroller programmer comprising a programmer body (10) and a programmer handle body (30), the programmer body (10) comprising a voltage stabilization circuit (11), a CPU main control unit (12), a communication interface (13) and a programming interface (14) connected to the CPU main control unit (12), the programmer handle (30) including a socket (31) for connecting the programming interface (14) and for A plurality of pogo pins (32) connected to the target plate, characterized by:

The programmer body (10) further includes a password protection module (18) for limiting the number of programming, and an encryption and decryption module (18) for encrypting and Decrypt the programming file;

The plurality of pogo pins (32) include a long needle for the ground wire that first contacts the target plate.

2. The microcontroller of claim 1, further comprising a programming interface selection circuit (16), the programming interface selection circuit (16) cooperating with the programming interface (14) to implement a programming interface type Switch.

3. A hand-held microcontroller programmer according to claim 2, wherein said programming interface selection circuit (16) is controlled using a DIP switch.

The handheld MCU programmer according to claim 2, wherein the plurality of spring pins (32) are plug-in spring pins, which can be plugged into a double row ten pin, a single row five pin or a single Three rows of needles.

The single chip programmer according to claim 1, further comprising a power supply mode selection circuit (15), wherein the power supply mode selection circuit (15) and the voltage stabilization circuit (11) cooperate to implement a power supply mode Switch.

The single chip programmer according to claim 5, wherein the input end of the voltage stabilizing circuit (11) is connected to an external power source or an internal battery, and the output terminal supplies power to the programmer body (10).

The single chip programmer according to claim 6, wherein the output end of the voltage stabilizing circuit (11) further supplies power to the target board.

8. The handheld MCU as claimed in claim 5, wherein the target board supplies power to the programmer body.

9. The handheld MCU programmer according to claim 5, wherein DIP is used A dip switch is used to control the power supply mode selection circuit (15).

10. The handheld MCU as claimed in claim 1, wherein the programmer body (10) further comprises a programming mode selection module for switching between a manual programming mode and an automatic programming mode.

The handheld MCU programmer according to claim 10, wherein the programmer body (10) further comprises a programming button (26) and a reset button (25) connected to the CPU main control unit (12). The programming button (26) is used for manual programming, and the reset button circuit (25) is used to reset the CPU main control unit (12).

12. The handheld microcontroller programmer of claim 1, wherein the programmer body (10) further comprises the programming content selection circuit (17), the programming content comprising a programming target board and erasing Target board.

13. The handheld MCU as claimed in claim 1, wherein the programming interface (14) of the programmer body is connected to a factory flat cable, and the other end of the flat cable is used to connect the programmer. The socket (31) of the handle body (30) or the target board.

14. The handheld microcontroller programmer of claim 1, wherein the programmer body (10) further comprises an indication and alarm circuit for indicating a programmer operation _{: a} status, the indication and alarm circuit comprising Two LED lights and one buzzer, one of which is used to indicate the programming process, and the other LED is used in conjunction with the buzzer to indicate whether the programming was successful.

^: 15, hand-held programming microcontroller according to claim 1, wherein said programming interface further includes a protection circuit, the protection circuit can be achieved by transient suppression protection and overcurrent protection.

The handheld MCU programmer according to any one of claims 1 to 15, wherein the communication interface (13) is an RS232 serial interface, and the CPU main control unit (12) adopts a single chip C8051F123. The programming interface (14) is a switchable C2/JTAG interface.