CN107977212A - Support the high speed cd-rom recorder of multiple communication modes - Google Patents

Abstract

The present invention relates to a kind of high speed cd-rom recorder for supporting multiple communication modes,Including pcb board,The pcb board is equipped with microprocessor,Internal memory chip,Voltage transformation module,Power interface,SPI interface,CAN interface,External signal triggers button,The microprocessor has 2 groups and more than 2 groups of SPI signal line,The internal memory chip is connected by one group of SPI signal line with microprocessor,The SPI interface is connected by remaining SPI signal line with microprocessor,The output terminal of the voltage transformation module is connected with the power end and ground terminal of microprocessor and internal memory chip,The CAN interface is connected with the CAN H/L ports of microprocessor,The external signal triggering button is connected with the I/O mouths of microprocessor,The input terminal of the power interface connection voltage transformation module.The high speed cd-rom recorder is light, is easy to carry about with one and operates, the online upgrading after upgraded in offline and entrucking suitable for ECU such as automobile combination meters.

Description

High-speed programmer supporting multiple communication methods

technical field

The invention belongs to the technical field of automotive electronics, and in particular relates to a peripheral storage device and a main control chip programming used in an automotive electronic circuit, in particular to a main controller used in a vehicle ECU (electronic control unit) It is a high-speed programmer for burning peripheral memory chips, which supports burning methods of various communication protocols.

Background technique

With the continuous development of the automobile industry, the functions of the automobile instrument cluster are becoming more and more abundant, and the number of later upgrades and inspections tends to increase. At present, the programming method of the main control chip and peripheral storage devices on the control board of the automobile instrument cluster There are mainly three types:

(1) Offline programming: The memory chip is programmed before SMT placement, but it will be difficult to achieve later testing and upgrading.

(2) Semi-offline programming: After the memory chip is placed on the SMT, the SPI (Serial Peripheral Interface, Serial Peripheral Interface) data line and power line are drawn out for programming, but this kind of later upgrade without disassembly is also difficult to achieve , and connecting to the power supply is easy to cause the MCU (Micro controller unit) of the car instrument cluster control motherboard to self-lock and start abnormally.

(3) CAN bus programming: The memory chip is programmed through the CAN bus, but the transmission rate of the CAN bus is relatively low, resulting in a long time for programming.

Therefore, the programming method adopted by the burner in the prior art has been unable to meet the programming and upgrading of the main control chip and peripheral storage devices on the control board of the automobile instrument cluster, and a new type of burner is urgently needed to solve the problem. The problems existing in the above three burning methods.

Contents of the invention

The purpose of the present invention is to provide a high-speed burner suitable for offline upgrade of automobile instrument cluster and online upgrade after loading and supporting multiple communication modes. The burner has a high programming rate and can support multiple communications The programming of the interface is completely suitable for the offline programming and online programming of the main control program and resource program of the automobile combination instrument.

In order to achieve the above object, the technical solution adopted by the present invention is, a high-speed burner supporting multiple communication modes, including a PCB board (Printed Circuit Board, printed circuit board), said PCB board is provided with a microprocessor, Internal storage chip, voltage conversion module, power interface, SPI interface, CAN interface, external signal trigger button, the microprocessor has 2 or more sets of SPI signal lines, and the internal storage chip passes through a set of SPI signal lines Connected with the microprocessor, the SPI interface is connected with the microprocessor through the remaining SPI signal lines, the output terminal of the voltage conversion module is connected with the power supply terminal and the ground terminal of the microprocessor and the internal memory chip, and the CAN interface It is connected with the CAN H/L port of the microprocessor, the said external signal trigger button is connected with the I/O port of the microprocessor, and said power supply interface is connected with the input terminal of the voltage conversion module.

As an improvement of the present invention, an LED indicator light is provided on the PCB, and the LED indicator light is connected to the I/O port of the microprocessor; the external signal trigger button includes a start button (start button) and a stop button. button (stopbutton).

As an improvement of the present invention, a set of SPI signal lines of the microprocessor includes a SCLK port, a MOSI port, a MISO port, a CS port and a GND port.

As an improvement of the present invention, the microprocessor adopts a microcontroller whose model is RH850D1L, and the model of the internal storage chip is MT25TL01G.

As an improvement of the present invention, the voltage conversion module converts the 5V power supply into 3.3V, and the voltage conversion module is designed with a main control chip whose model is TLV1117.

As an improvement of the present invention, a Flash boot-Loader program is loaded on the microprocessor to run a Flash boot-Loader software system, and the Flash boot-Loader software system includes a driver layer and a logic application control layer (abbreviated as "application Layer"), the application layer encapsulates standard protocol interfaces and basic control processes, and the driver layer is composed of necessary communication drivers and peripheral device control drivers.

As an improvement of the present invention, the driver layer is provided with two mainstream communication protocol drivers of SPI and CAN, which are used to read and write peripheral storage devices with these two protocol interfaces on the control board of the automobile instrument cluster.

As an improvement of the present invention, in order to understand the operating status of the program upgrade or chip flashing process, the driver layer also includes a GPIO control driver, which is used to control the LED indicator light on the PCB board to clearly indicate the current working status of the system .

As an improvement of the present invention, in order to facilitate users to control the operation of the system through key operations, the driver layer also includes A/D analog-to-digital conversion drivers, which can be used to identify the key circuit of the external signal triggering the key, thereby Notify the MCU of the car combination instrument control board to recognize the user's different key command operations to control the process of program upgrades or chip flashing.

As an improvement of the present invention, the application layer encapsulates the standard command interface defined in the diagnostic protocol specification of the international standard ISO-15765/ISO-14229. This enables the system to be well transplanted to automotive instrument clusters and other ECUs (electronic control units) for software and resource upgrades, and the system has high portability and reusability.

Compared with the prior art, the overall structure design of the high-speed programmer supporting multiple communication modes proposed by the present invention is ingenious, easy to disassemble, assemble, repair and replace, and the cost is low. The structure of the entire programmer is simple, light, and easy to carry and operate , since there are 2 or more sets of SPI signal lines on the PCB, it is easy to expand more SPI interfaces to achieve high-speed programming. In addition, this high-speed programmer supports SPI and CAN communication methods. The car combination meter controls the programming and upgrading of the main control chip and peripheral storage devices on the main board, so as to facilitate the upgrading and maintenance of the car combination meter, and also improve the speed of product testing and development.

Description of drawings

Fig. 1 is a block diagram of the circuit structure of the preferred embodiment of the present invention.

FIG. 2 is a circuit diagram of a voltage conversion module in a preferred embodiment of the present invention.

Fig. 3 is a schematic diagram of the connection relationship between the programmer, the target device and the host computer according to the preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of the circuit connection of the burner self-upgrading in the preferred embodiment of the present invention.

Fig. 5 is a hierarchy diagram of the Flash boot-Loader software system in the preferred embodiment of the present invention.

FIG. 6 is a flow chart of upgrading the Flash boot-Loader software system in a preferred embodiment of the present invention.

Detailed ways

In order to deepen the understanding and recognition of the present invention, the present invention will be further described and introduced below in conjunction with the accompanying drawings.

As shown in Figure 1, a high-speed programmer supporting multiple communication methods is provided, including a PCB board, which is equipped with a microprocessor RH850D1L, an internal memory chip MT25TL01G, a voltage conversion module, a power interface, SPI interface, CAN interface, external signal trigger button, the microprocessor has 2 sets of SPI signal lines, the internal memory chip MT25TL01G is connected to the microprocessor through a set of SPI signal lines, and the SPI interface is connected to the microprocessor through another set of SPI The signal line is connected with the microprocessor. Wherein, a group of SPI signal lines arranged between the microprocessor and the internal memory chip include SCLK ports, MOSI ports, MISO ports, and CS ports, and a group of SPI signal lines arranged between the microprocessor and the SPI interface include SCLK port, MOSI port, MISO port, CS port, and GND port. The output terminal of the voltage conversion module is connected with the power supply terminal and the ground terminal of the microprocessor and the internal storage chip, the CAN interface is connected with the CAN H/L port of the microprocessor, and the external signal trigger button is connected with the microprocessor The I/O port of the power supply is connected to the input end of the voltage conversion module. This high-speed programmer is suitable for offline upgrade of ECU (electronic control unit) such as automobile instrument cluster and online upgrade after loading.

Among them, as shown in Figure 2, the voltage conversion module is designed with a main control chip model TLV1117, which can convert 5V power to 3.3V, thereby providing power for the microprocessor RH850D1L and the internal memory chip MT25TL01G. A diode is arranged between the output terminal and the input terminal of the voltage conversion module, the anode of the diode is connected to the output terminal, and the negative pole of the diode is connected to the input terminal.

An LED indicator light is arranged on the PCB board, and the LED indicator light is used as a working indicator light of the burner, which is connected with the I/O port of the microprocessor and controlled by GPIO. The buttons triggered by the external signal include a start button and a stop button. When the high-speed programmer is used, the process of upgrading the MCU program or chip flashing on the control board of the car instrument cluster is controlled by the operation of the external signal trigger button.

Flash boot-Loader program is loaded in the above-mentioned microprocessor, can run Flash boot-Loader software system, this software system comprises driver layer and application layer, and this software system is made up of a whole set of Flash boot-Loader control strategy, this The Flash boot-Loader program simplifies the driver layer and application layer, and the design volume is controlled within 300KB, which can be well transplanted to MCU (Micro controller unit) with smaller capacity and lower cost. The standard protocol interface and basic control process are encapsulated on the application layer, and the driver layer is composed of necessary communication drivers and peripheral device control drivers. In addition, the overall software system follows the principle of handshake communication. The Flash boot-Loader software system needs to run on the system of the target device and the system of the burner at the same time. When there is a need for chip resources or program upgrades, the two sets of Flash boot-Loader software systems of the target device system and the programmer system perform handshake communication. After the communication is successful, enter the upgrade mode to perform software upgrades. After the communication fails, the system will feed back the cause of the failure and notify the user to request an upgrade again. Refer to Figure 6 for the upgrade flow chart.

As shown in Figure 5, the driver layer includes two mainstream communication protocol drivers of SPI and CAN, which are used to read and write the peripheral storage devices with these two protocol interfaces on the control board of the automobile instrument cluster, and can also include IIC at the same time. The communication protocol driver is used to read and write the peripheral storage device with this protocol interface on the control board of the automobile combination instrument. In the Flash boot-Loader software program control of the microprocessor, the two interface methods of SPI and CAN have a common upgrade process, but finally use different communication protocols to realize communication and data transmission with the target device. As for which interface method to choose for flashing and upgrading, it depends on the occasion where the target device is located. For example, the target device is an automobile combination meter. When the combination meter is in the production stage or delivered to the warehouse of the automobile manufacturer, if you want to realize rapid software upgrade, you can directly connect to the SPI interface of the programmer to realize the software upgrade. When the combination meter has been loaded and sent to the 4S store, if the combination meter product is not allowed to be disassembled, the CAN interface of the programmer can be used to directly connect the CAN H/L in the OBD port of the car to realize software and resource upgrades. In order to understand the operating status during program upgrade or chip flashing, the driver layer also includes a GPIO control driver, which is used to control the LED indicators on the PCB board to indicate the current working status of the system. In addition, in order to facilitate the user to control the operation of the system through button operations, the driver layer also includes A/D analog-to-digital conversion drivers, which can be used to identify the button circuit of the button triggered by an external signal, thereby notifying the car combination instrument control main board The MCU recognizes the user's different key command operations to control the process of program upgrades or chip flashing. In terms of operation mode, use the external signal of the programmer to trigger the start and stop buttons of the button to perform long/short press, start and stop operations, and indicate the current working status through the LED indicator. The application layer encapsulates the standard command interface defined in the diagnostic protocol specification of the international standard ISO-15765/ISO-14229, so that the system can be well transplanted to the automobile instrument cluster and other ECUs of the automobile to realize software and resource upgrades. It has high portability and reusability.

The self-software upgrade of the PCB board of the burner is realized by the host computer, and the host computer is connected to the SPI interface of the PCB board through the USB to SPI module. Refer to Figure 4 for the circuit connection between the host computer and the programmer. After the burner is upgraded, the burner can be used to upgrade the software and resources of a large number of target devices (car instrument clusters).

As shown in Figure 3, when the high-speed programmer is in use, it is connected with the target device (car instrument cluster), 5V power supply, host computer and USB-to-SPI module, specifically: the host computer is connected to the USB-to-SPI module through the USB interface , Connect the SPI signal line of the SPI interface on the USB to SPI module with the SPI interface of the high-speed programmer. At the same time, use the SPI signal line to connect the SPI interface of the target device to the SPI interface of the high-speed programmer, or connect the CAN interface of the target device to the CAN interface of the high-speed programmer through the CAN bus. The power interface of the high-speed programmer is connected to a 5V power supply, and the voltage conversion module converts the 5V power supply into 3.3V to supply power to the microprocessor and internal memory chips.

Then, through the host computer, convert the program to be upgraded into SPI protocol data through the USB to SPI module, and burn it into the internal memory chip of the high-speed programmer, specifically: the host computer sends the target program and control commands to the USB to SPI On the module, the target program and instructions are converted into SPI protocol and sent to the SPI interface of the high-speed programmer through this module, and the host computer notifies the microprocessor to accept the target program and store it on the internal memory chip. Then the high-speed programmer can reprogram the program to other target devices to be upgraded through the Flash boot-Loader software system.

When the target device is in a single group state, that is, offline and not loaded, the SPI interface of the target device is connected to the SPI interface of the burner, and the external signal triggers the button to trigger the microprocessor to perform the burning operation, and the target program of the internal memory chip Read it out and send it to the microprocessor of the target device through the SPI interface. Similarly, the target device burns the target program into the memory chip through the SPI interface. Since the transmission rate of the SPI interface can reach 8Mps, the system programming is usually through the SPI protocol, the transmission rate is fast, and the programming execution time is short.

And when the target device is in the vehicle system, that is, when it is loaded online, the CAN interface of the target device is connected to the CAN interface of the programmer through the DB9 to OBD cable, and then the external signal triggers the button to trigger the microprocessor of the programmer The microprocessor of the target device processor is burned, and an instruction is sent to make the microprocessor of the target device send the target program to the memory chip through the CAN protocol.

It should be noted that the above-mentioned embodiments are not used to limit the protection scope of the present invention, and equivalent transformations or substitutions made on the basis of the above-mentioned technical solutions all fall within the protection scope of the claims of the present invention. In the claims, the word "comprising" does not exclude the presence of elements not listed in the claims.

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (9)

1. A high-speed programming device supporting multiple communication modes, characterized in that: it comprises a PCB board, and said PCB board is provided with a microprocessor, an internal memory chip, a voltage conversion module, a power supply interface, an SPI interface, and a CAN interface 1. An external signal triggers the button, the microprocessor has 2 or more SPI signal lines, the internal storage chip is connected to the microprocessor through a set of SPI signal lines, and the SPI interface is connected to the other SPI signal lines Connected with the microprocessor, the output terminal of the voltage conversion module is connected with the power supply terminal and the ground terminal of the microprocessor and the internal memory chip, the CAN interface is connected with the CAN H/L port of the microprocessor, and the external signal The trigger button is connected with the I/O port of the microprocessor, and the power supply port is connected with the input end of the voltage conversion module. 2. The high-speed programming device supporting multiple communication modes as claimed in claim 1, wherein an LED indicator light is provided on the PCB, and the LED indicator light is connected with the I/O port of the microprocessor ; The buttons triggered by the external signal include a start button and a stop button. 3. The high-speed programming device supporting multiple communication modes as claimed in claim 2, wherein one group of SPI signal lines of the microprocessor comprises an SCLK port, a MOSI port, a MISO port, a CS port and a GND port . 4. The high-speed programming device supporting multiple communication methods as claimed in claim 3, wherein the microprocessor is a microcontroller of model RH850D1L, and the model of the internal memory chip is MT25TL01G. 5. The high-speed programmer supporting multiple communication methods as claimed in claim 4, wherein the voltage conversion module converts the 5V power supply into 3.3V, and the voltage conversion module adopts a main control chip whose model is TLV1117 to design . 6. the high-speed programmer supporting multiple communication modes as claimed in claim 5, is characterized in that, said microprocessor is provided with Flash boot-Loader software system, and described Flash boot-Loader software system comprises driver layer and the logic application control layer. 7. The high-speed programmer supporting multiple communication methods as claimed in claim 6, wherein the driver layer is provided with SPI and CAN communication protocol drivers. 8. The high-speed programmer supporting multiple communication methods as claimed in claim 7, wherein the driver layer is provided with a GPIO control driver and an A/D analog-to-digital conversion driver. 9. The high-speed programmer supporting multiple communication methods as claimed in claim 8, wherein the application layer encapsulates the standard command interface defined in the diagnostic protocol specification of the international standard ISO-15765/ISO-14229 .