CN111443879B - High-speed communication method based on high-resolution ink-jet printer ARM and FPGA - Google Patents

High-speed communication method based on high-resolution ink-jet printer ARM and FPGA Download PDF

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Publication number
CN111443879B
CN111443879B CN202010236569.3A CN202010236569A CN111443879B CN 111443879 B CN111443879 B CN 111443879B CN 202010236569 A CN202010236569 A CN 202010236569A CN 111443879 B CN111443879 B CN 111443879B
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data
usb
fpga
upper computer
sprayer
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CN111443879A (en
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周甲茂
滕亮亮
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Langdi Technology Co ltd
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Langdi Technology Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1211—Improving printing performance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1236—Connection management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
    • G06F3/1279—Controller construction, e.g. aspects of the interface hardware

Abstract

The invention relates to a high-speed communication method based on an ARM (advanced RISC machine) and an FPGA (field programmable gate array). A master control CPU (central processing unit) of an upper computer sends jet printing data and commands to a head splitting module through a bus, and the head splitting module divides the data into 4 corresponding lower computer data and sends the data to a USB (universal serial bus) of each lower computer; in the lower computer, an FPGA is directly connected with a USB chip and an SRAM storage chip, and the FPGA directly stores data sent by the USB into the SRAM to wait for jet printing; the USB bus of the upper computer is in communication control with the sprayer singlechip in a two-way mode, the USB bus of the upper computer reads data of the sprayer FPGA in a one-way mode, the USB bus of the upper computer sends spray printing data to the sprayer FPGA in a one-way mode, and the USB bus of the upper computer sends control data to the sprayer FPGA in a one-way mode. The technical scheme of the invention has the technical effect of high-speed communication between the ARM and the FPGA.

Description

High-speed communication method based on high-resolution ink-jet printer ARM and FPGA
Technical Field
The invention relates to the technical field of ink jet printers, in particular to a high-speed communication method based on an ARM (advanced RISC machine) and an FPGA (field programmable gate array).
Background
Different with traditional CIJ ink jet numbering machine of high-resolution ink jet numbering machine compare that the printing effect is more clear, and it is faster to spout seal speed. Therefore, the high-resolution inkjet printer requires a larger communication data volume and a higher data transmission speed.
At present, the communication control scheme of an upper computer and a lower computer of an ink-jet printer comprises the following steps: the system comprises a high-speed CPU, a DSP (digital signal processor), a CPLD (Complex Programmable Logic Device) and an FPGA (Field Programmable Gate Array), wherein the high-speed CPU and the DSP have the defect of high cost in control, and due to the serial instruction characteristic, when the speed of a production line is higher, the spray printing control of the ink-jet printer cannot always keep up with the change of the speed of the production line in real time, so that the problems of spray leakage, discontinuity and the like are caused; although the CPLD control supports parallel processing, the CPLD control is control-intensive, and there is no memory available as a data buffer in the chip, so that an external memory is required, which results in increased cost, complicated circuit, and increased size of the device.
Disclosure of Invention
The invention mainly aims to provide a high-speed communication method based on an ARM and an FPGA of a high-resolution ink-jet printer.
In order to achieve the aim, the invention provides a high-speed communication method based on an ARM (advanced RISC machine) and an FPGA (field programmable gate array), wherein a master control CPU (central processing unit) of an upper computer sends jet printing data and commands to a head splitting module through a bus, and the head splitting module divides the data into 4 corresponding lower computer data and sends the data to a USB (universal serial bus) of each lower computer; in the lower computer, an FPGA is directly connected with a USB chip and an SRAM storage chip, and the FPGA directly stores data sent by the USB into the SRAM to wait for jet printing; the USB bus of the upper computer is in communication control with the sprayer singlechip in a two-way mode, the USB bus of the upper computer reads data of the sprayer FPGA in a one-way mode, the USB bus of the upper computer sends spray printing data to the sprayer FPGA in a one-way mode, and the USB bus of the upper computer sends control data to the sprayer FPGA in a one-way mode.
Furthermore, the USB chip is initialized when the upper computer is started, the configuration IO port of the FPGA is directly connected with the USB chip, the upper computer sends configuration data to the single chip microcomputer in the USB chip through the USB endpoint 1, the single chip microcomputer in the USB chip configures the FPGA through the IO port of the USB chip according to the FPGA configuration protocol, and a configuration process result is returned through the USB endpoint 1 of the USB chip.
Further, the command sending process of the inkjet printer is as follows: the upper computer obtains a command instruction needing to be sent through user operation, and packs the command instruction by adding corresponding check codes before and after the command instruction according to a communication protocol; the upper computer sends a command instruction to the lower computer from the specified USB channel through the USB communication module; meanwhile, the lower computer detects that the command instruction is read and written into the FIFO command module through the USB communication module, and waits for the main spray printing program to call.
Further, the process of sending the jet printing data is as follows: the upper computer acquires spray printing content data and spray printing parameters to be sent through a spray printing file, and packs the spray printing content data and the spray printing parameters by adding corresponding check codes before and after a command instruction according to a communication protocol; the upper computer sends the jet printing content data and the jet printing parameters to the lower computer from the specified USB endpoint through the USB communication module; and the lower computer detects that the data channel has data input, directly writes the read jet printing data into the SRAM through the read-write SRAM module, and waits for the jet printing main program to call.
Further, the data returning process of the lower computer is as follows: when the jet printing is finished, the lower computer actively transmits a group of jet printing finishing commands back to the upper computer through the return channel, and informs the upper computer to send a next group of command commands and jet printing data.
Furthermore, after the data sent to the spray head is generated, the upper computer preprocesses the data required to be sent next time in advance, and when the lower computer needs the data, the data can be sent immediately when the data is required to be spray-printed next time, and the next data preprocessing is carried out; and the upper computer simultaneously reads whether the USB has data returned by the FPGA at intervals in the thread and carries out next generation or corresponding instruction according to returned contents.
Further, the upper computer communicates with a USB chip through a USB bus, and the USB chip is in communication control with the sprayer power supply control singlechip through a serial port of a singlechip functional block integrated with the USB chip, so that the communication control of the sprayer singlechip chip and the program upgrade of the sprayer singlechip are realized; the upper computer realizes the control of the sprayer singlechip through the bidirectional communication of the USB endpoint 1; the USB chip single chip microcomputer monitors FIFO of the endpoint 1 in real time, judges whether the FIFO has data of an upper computer or not, and sends the data to the nozzle single chip microcomputer through a serial port; the USB chip single chip microcomputer reads single chip microcomputer data received by the serial port and sends the data to the upper computer through the USB endpoint 1.
According to the technical scheme, a data bridge is built between arm and FPGA through USB, control and data transmission of an HP thermal foaming printing box are achieved, a communication protocol between an upper computer and a lower computer is formulated, a USB hub module is added in the upper computer, a plurality of nozzles can be controlled simultaneously, and a USB communication module is added in the upper computer, wherein the USB communication module is specifically subdivided into a command module, a data module and a receiving module; the sprayer singlechip controls the working voltage of the sprayer ink box, the peripheral equipment detects the sprayer ink box, the FPGA reads the data of the spray printing content of the SRAM, and the spray printing is displayed by operating the interface of the HP thermal foaming ink box through the parallel port. The ARM and FPGA high-speed communication is realized, and the data transmission of the high-speed high-resolution ink-jet printer is realized by utilizing the characteristics of high-speed parallel transmission, multiple channels and simultaneous reading and writing of the USB. And a data bridge is built between the ARM and the FPGA by using the USB, so that the control and data transmission of the HP thermal foaming printing box are realized. The FPGA receives data and utilizes the characteristics of multiple IO high time sequences and high precision to better control the spray nozzle to spray and print, the USB simultaneously distributes the data to the peripheral management of the spray nozzle singlechip control spray nozzle, and more data exchange in shorter time is realized under the least buses to control the spray nozzle to print.
Drawings
Fig. 1 is a schematic block diagram of the technical solution of the present invention.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Referring to the attached drawings in the specification, the high-speed communication method based on the ARM and the FPGA selects the USB bus communication as a data path, is favorable for quickly transmitting data volume, and manages and communicates the hardware of the spray head corresponding to the end point of the USB and the spray head equipment. The upper computer of the high-resolution ink-jet printer adopts an ARM Cortex-A7 chip of a whole log A20, four USB ports are expanded outside a Hub chip of a USB to communicate with a USB chip Cy7c68013A on a nozzle, meanwhile, a parallel bus of the Cy7c68013A is connected with the FPGA to communicate, and a serial port of the Cy7c68013A is connected with a nozzle singlechip to communicate.
The whole log A20 has 3 paths of USB, supports 2.0 high speed USB, 2.0 full speed USB and 1.1 USB; the USB2.0 high-speed specification improves the transmission speed to 480Mbps, and the USB speed of the method is the USB2.0 high speed. 4 paths of USB differential signals DM and DP from the hun of the USB of the upper computer are connected to DMINUS and DPLUS of Cy7c68013A, TXD0 and RXD0 of the Cy7c68013A and P3.1 and P3.0 of the stc15w408as of the singlechip, so that the communication of the upper computer to the singlechip is realized, and the program upgrade of the singlechip is realized at the same time; parallel port data FDO-FD15 of Cy7c68013A, a clock signal IFCLK, read-write control SLRD and SLWR, and io connection of status ports FLAG _ A and FLAG _ B and FPAG, so that the communication process between A20 and FPGA is realized. Meanwhile, common IO ports PC0-PC4 of the Cy7c68013A are connected with the IO ports of the FPGA, and configuration of the FPGA program by the upper computer is achieved.
In this embodiment, the upper computer adopts a20 as a main control CPU, and the upper computer sends the inkjet printing data and commands to the header module through a bus, and the header module divides the data into 4 corresponding lower computer data and sends the data to the USB of each lower computer.
In the lower computer, an FPGA is directly connected with a USB chip and an SRAM storage chip, and the FPGA directly stores data sent by the USB into the SRAM to wait for jet printing.
The end point 1 of the USB bus of the upper computer is in bidirectional communication control with the sprayer singlechip, the end point 6 of the USB bus of the upper computer reads data of the sprayer FPGA in a unidirectional mode, the end point 2 of the USB bus of the upper computer sends jet printing data to the sprayer FPGA in a unidirectional mode, and the end point 8 of the USB bus of the upper computer sends control data to the sprayer FPGA in a unidirectional mode.
The upper computer is started, cy7c68013a is initialized, and configuration IO ports of the FPGA are directly connected with the cy7c68013a. The upper computer sends configuration data to the cy7c68013a internal single-chip microcomputer through the USB endpoint 1, the cy7c68013a internal single-chip microcomputer configures the FPGA through the IO port of the cy7c68013a according to the FPGA configuration protocol, and a configuration process result is returned through the USB endpoint 1 of the cy7c68013a.
The command sending process of the ink-jet printer is as follows: the upper computer obtains a command instruction to be sent through user operation, and corresponding check codes are added to the front and the back of the command instruction according to a communication protocol to package the command instruction. And the upper computer sends the command instruction to the lower computer from the specified USB channel through the USB communication module. Meanwhile, the lower computer detects that the command instruction is read and written into the FIFO command module through the USB communication module and waits for the calling of the jet printing main program.
The process of sending the jet printing data is as follows: and the upper computer acquires the jet printing content data and the jet printing parameters which need to be sent through the jet printing file, and packs the jet printing content data and the jet printing parameters by adding corresponding check codes before and after the command instruction according to a communication protocol. The host computer sends a command instruction from a specified USB endpoint (the USB endpoint 2 sends jet printing content, and the USB endpoint 8 sends jet printing parameters) to the lower computer through the USB communication module. And the lower computer detects that data input exists in the data channel, directly writes the read spray printing data into the SRAM through the read-write SRAM module, and waits for the spray printing main program to call.
The data returning process of the lower computer comprises the following steps: when the jet printing is finished, the lower computer actively returns a group of jet printing finishing commands to the upper computer through a return channel (USB endpoint 6) to inform the upper computer to send a next group of command instructions and jet printing data.
After the data for the spray head is generated, the upper computer preprocesses the data to be sent next time in advance, and when the lower computer needs the data, the data can be sent immediately when the data needs to be spray-printed next time, and the next data preprocessing is carried out. And the host computer simultaneously reads whether the USB endpoint 6 has data returned by the FPGA at intervals in the thread and carries out next generation or corresponding instruction according to the returned content.
The upper computer is communicated with the USB chip through a USB bus, and the USB chip is in communication control with the sprayer power supply control single chip microcomputer through a serial port of a single chip microcomputer functional block integrated with the USB chip, so that communication control over the sprayer single chip microcomputer chip and program upgrading over the sprayer single chip microcomputer are achieved. The upper level realizes the control of the sprayer singlechip through the bidirectional communication of the USB endpoint 1. The Cy7c68013A single chip microcomputer monitors FIFO of the endpoint 1 in real time, judges whether the FIFO has data of an upper computer or not, and sends the data to the sprayer single chip microcomputer through a serial port; and the Cy7c68013A singlechip reads the singlechip data received by the serial port and sends the data to the upper computer through the USB endpoint 1.
The upper computer sends to FPGA format:
and sending 32-byte jet printing parameters through the USB endpoint 8, wherein the 32-byte content distinguishes corresponding content according to a predefined format.
The data of the content is transmitted through the USB endpoint 2, and the amount of data is determined according to the content.
The 8 bytes of end data are sent through USB endpoint 8. The FPGA can enter a jet printing state as long as the FPGA receives the data to indicate that the content is finished.
The main working process of the upper computer comprises the following steps:
and starting up, searching a CY7C68013a device through the USB node, and initializing the CY7C68013a.
And configuring an FPGA main program through CY7C68013a.
And processing the jet printing content data.
And sending the jet printing content data and the jet printing parameters.
And sending a control instruction of the sprayer singlechip.
And waiting for reading the FPGA return information, and sending new content after receiving the data.
And waiting for reading the information returned by the sprayer singlechip, and displaying the state of the sprayer by the upper computer after receiving the data.
And the upper computer is idle and is ready for next-time jet printing of content data.

Claims (7)

1. A high-speed communication method based on an ARM and an FPGA of a high-resolution ink-jet printer is characterized by comprising the following steps:
the upper computer main control CPU sends the jet printing data and the command to the head splitting module through a bus, and the head splitting module splits the data into 4 corresponding lower computer data and sends the data to a USB (universal serial bus) of each lower computer;
in the lower computer, an FPGA is directly connected with a USB chip and an SRAM storage chip, and the FPGA directly stores data sent by the USB into the SRAM to wait for jet printing;
the USB bus of the upper computer is in communication control with the sprayer singlechip in a two-way mode, the USB bus of the upper computer reads data of the sprayer FPGA in a one-way mode, the USB bus of the upper computer sends spray printing data to the sprayer FPGA in a one-way mode, and the USB bus of the upper computer sends control data to the sprayer FPGA in a one-way mode.
2. The high-speed communication method based on the high-resolution ink-jet printer ARM and the FPGA as claimed in claim 1, wherein the method comprises the following steps: the USB chip is initialized when the upper computer is started, the configuration IO port of the FPGA is directly connected with the USB chip, the upper computer sends configuration data to the single chip microcomputer in the USB chip through the USB endpoint 1, the single chip microcomputer in the USB chip configures the FPGA through the IO port of the USB chip according to the FPGA configuration protocol, and a configuration process result is returned through the USB endpoint 1 of the USB chip.
3. The high-speed communication method based on the high-resolution ink-jet printer ARM and the FPGA as claimed in claim 1, wherein the method comprises the following steps: the command sending process of the ink-jet printer comprises the following steps: the upper computer obtains a command instruction to be sent through user operation, and packs the command instruction by adding corresponding check codes before and after the command instruction according to a communication protocol; the upper computer sends a command instruction to the lower computer from the specified USB channel through the USB communication module; meanwhile, the lower computer detects that the command instruction is read and written into the FIFO command module through the USB communication module, and waits for the main spray printing program to call.
4. The high-speed communication method based on the high-resolution ink-jet printer ARM and the FPGA as claimed in claim 1, wherein the method comprises the following steps: the process of sending the jet printing data comprises the following steps: the upper computer acquires spray printing content data and spray printing parameters to be sent through a spray printing file, and packs the spray printing content data and the spray printing parameters by adding corresponding check codes before and after a command instruction according to a communication protocol; the upper computer sends the jet printing content data and the jet printing parameters to the lower computer from the specified USB endpoint through the USB communication module; and the lower computer detects that data input exists in the data channel, directly writes the read spray printing data into the SRAM through the read-write SRAM module, and waits for the spray printing main program to call.
5. The method for high-speed communication between the ARM and the FPGA based on the high-resolution ink-jet printer according to claim 1, wherein: the data returning process of the lower computer is as follows: when the jet printing is finished, the lower computer actively transmits a group of jet printing finishing commands back to the upper computer through the return channel, and informs the upper computer to send a next group of command commands and jet printing data.
6. The method for high-speed communication between the ARM and the FPGA based on the high-resolution ink-jet printer according to claim 5, wherein: after the data to the spray head is generated, the upper computer preprocesses the data to be sent next time in advance, and when the lower computer needs the data, the data can be sent immediately when the data needs to be spray-printed next time, and the next data preprocessing is carried out; and the upper computer simultaneously reads whether the USB has data returned by the FPGA at intervals in the thread and carries out next generation or corresponding instruction according to returned content.
7. The method for high-speed communication between the ARM and the FPGA based on the high-resolution ink-jet printer according to claim 1, wherein: the upper computer is communicated with a USB chip through a USB bus, and the USB chip is in communication control with the sprayer power supply control singlechip through a serial port of a singlechip functional block integrated with the USB chip, so that the communication control of the sprayer singlechip chip and the program upgrade of the sprayer singlechip are realized; the upper computer realizes the control of the sprayer singlechip through the bidirectional communication of the USB endpoint 1; the USB chip single chip microcomputer monitors the FIFO of the endpoint 1 in real time, judges whether the FIFO has data of an upper computer or not, and sends the data to the sprayer single chip microcomputer through a serial port; the USB chip single chip microcomputer reads the single chip microcomputer data received by the serial port and sends the data to the upper computer through the USB endpoint 1.
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CN113253949A (en) * 2021-02-05 2021-08-13 深圳怡化电脑股份有限公司 Printing control method and device
CN114905871B (en) * 2022-04-24 2024-04-09 昇捷丰标识科技(厦门)有限公司 FPGA-based high-speed data transmission method and system for code spraying machine

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