CN104199366A - Control and communication port expansion module of godson 2F processor - Google Patents
Control and communication port expansion module of godson 2F processor Download PDFInfo
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- CN104199366A CN104199366A CN201410473053.5A CN201410473053A CN104199366A CN 104199366 A CN104199366 A CN 104199366A CN 201410473053 A CN201410473053 A CN 201410473053A CN 104199366 A CN104199366 A CN 104199366A
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Abstract
The invention relates to the technical field of computers, particularly relates to the technical field of control and bus port expansion of computers, and discloses a control and communication port expansion module of a godson 2F processor. The control and communication port expansion module comprises an ARM [advanced RISC (reduced instruction set computer) machine] processor, an input module, an output module, a communication interface module, an FPGA (field programmable gate array) and a PCI (peripheral component interconnect) bridge chip. The input module is connected with the ARM processor; the output module is connected with the ARM processor; the communication interface module is connected with the ARM processor; the FPGA is connected with the ARM processor; the PCI bridge chip is connected with the FPGA; the PCI bridge chip is connected with a PCI bus. The control and communication port expansion module has the advantages that analog input, switch input, frequency input and matrix keyboard scanning functions are expanded for the godson 2F processor, and CAN (controller area network), 1553B communication bus functions and the like are expanded; the control and communication port expansion module is rich in expansion port type, high in transmission speed and low in godson 2F processor resource utilization, and the like.
Description
Technical field
The present invention relates to field of computer technology, particularly computer control and bus port expansion technique field.
Background technology
Loongson-2F CPU is the domestic a processor with independent intellectual property right of China, can be widely used in desktop application environment.But in some embedded control system applications, particularly relate to the application of military and other privacy requirements, Loongson-2F CPU is owing to there is no the accommodation function modules such as integrated ADC module, can not directly meet the function such as analog input, PWM generation, particularly CAN bus etc. is at the widely used communication bus of control system, Godson processor also cannot directly be supported, because the GPIO port of Loongson-2F CPU is little, also cannot realize the scanning monitoring to fairly large matrix keyboard.Above-mentioned reason has limited the application of Godson processor in some fields of some specific function of needs greatly.。
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Loongson-2F CPU control and communication port expansion module, solve Godson processor integrated inadequate resource, cannot be in shortcomings such as the application of some specific function of needs.
In order to solve the problems of the technologies described above, the present invention includes arm processor:
The load module being connected with arm processor, is transferred to main controller module by analog quantity, switching value, the frequency quantity signal of external world's input, and the scanning of realizable matrix keyboard;
The output module being connected with arm processor, by the output of arm processor gauge tap amount, PWM amount, meanwhile, realizes the load monitoring of output quantity and the feedback monitoring of PWM output current;
Be connected with arm processor communication interface modules, realize the exchanges data between communication interface and arm processor;
The FPGA being connected with arm processor, the initialization configuring by the information realization reading in configuring chip in the time powering on;
The PCI bridging chip being connected with FPGA, the data transmission that FPGA is received, also can be by the data transmission from pci bus to FPGA to PCI bridging chip;
Described PCI bridging chip is connected with pci bus.
The present invention is that Loongson-2F CPU has been expanded analog input, switching value input, frequency quantity input and matrix keyboard scan function, has expanded the output function such as switching value output, PWM output, and has expanded the communication bus such as CAN, 1553B function.Have Extended Capabilities Port abundant species, transmission speed fast, to advantages such as Loongson-2F CPU resources occupation rate are low.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention.
Embodiment
The embodiment that the present invention is cited; just for helping to understand the present invention; should not be construed as limiting the scope of the present invention; for those skilled in the art; without departing from the inventive concept of the premise; can also the present invention be improved and be modified, these improvement and modification also fall in the scope of the claims in the present invention protection.
As shown in Figure 1, the present invention includes arm processor, arm processor is selected STM32F107, and FPGA is connected with arm processor, realize FSMC bus control logic in fpga chip inside, between FPGA and arm processor, can realize by FSMC bus the fast transport of data.Arm processor has been expanded the outer SRAM storer of sheet of 128KB, and model is IS62WV6416DALL, as the storage space of program operation, also comprises:
The load module being connected with arm processor, is transferred to main controller module by analog quantity, switching value, the frequency quantity signal of external world's input, and the scanning of realizable matrix keyboard; Load module has been realized 4 road simulated measurement input circuits, realizes the 0V-32V voltage-type analog input amount of outside input is adapted for to the receivable 0-3.3V range of signal of arm processor; The multiplexing input circuit of 18 way switch amount/frequency quantity has also been realized in importation, can realize the multiplexing input of switching value/frequency quantity, and supports input signal Low level effective or the effective software exchange of high level to select, and draw in support/drop-down software exchange is selected.Keyboard scanning circuit has also been realized in importation, can realize the scanning monitoring of the matrix keyboard of maximum 6 × 6.1 road temperature observation circuit has also been realized in importation, by installing thermo-sensitive resistor additional, utilizes thermo-sensitive resistor dividing potential drop, and arm processor reads the mode of magnitude of voltage, converts out current temperature.
The output module being connected with arm processor, by the output of arm processor gauge tap amount, PWM amount, meanwhile, realizes the load monitoring of output quantity and the feedback monitoring of PWM output current; Realized 4 way switch amounts/PWM output, every road output port is supported switching value or PWM output software handover configurations; Every road output port has designed load monitoring circuit, by feedback circuit, output state is drawn to the GPIO pin that is back to arm processor, realizes open circuit to output port, short circuit, the output state such as normal is monitored; Every road output port has designed current feedback circuit, export for PWM type, the current value of output is transformed to magnitude of voltage by processing of circuit, after operational amplifier amplifies coupling, access arm processor, read magnitude of voltage by arm processor by ADC, then be converted to current value, realize the precision tracking to output current.
Be connected with arm processor communication interface modules, realize the exchanges data between communication interface and arm processor; CAN bus has been utilized the integrated CAN bus protocol device of arm processor, installs CAN bus transceiver TJA1040 outward additional at sheet, realizes the function of CAN bus; 1553B bus at arm processor sheet external expansion 1553B protocol chip model be BU-61580 and expanded transceiver, model is B-3067, realizes 1553B bus communication.
The FPGA being connected with arm processor, FPGA selects EP2C5, and be connected by Local Bus bus between PCI bridging chip, fpga chip has been expanded configuring chip EPC1PI8, the logical gate of design is all kept in configuring chip, the initialization configuring by the information realization reading in configuring chip in the time powering on.
The PCI bridging chip being connected with FPGA, PCI bridging chip has been selected PCI9054, having expanded EEPROM model is 93LC56B, be used for preserving PCI allocation bus end and Local Bus end configuration information, reading and saving after the system based on Loongson-2F CPU powers on, and distribute corresponding pci bus resource for this expansion module.
Described PCI bridging chip is connected with pci bus.
Claims (1)
1. Loongson-2F CPU control and communication port expansion module, include arm processor, it is characterized in that, also comprises:
The load module being connected with arm processor, is transferred to main controller module by analog quantity, switching value, the frequency quantity signal of external world's input, and the scanning of realizable matrix keyboard;
The output module being connected with arm processor, by the output of arm processor gauge tap amount, PWM amount, meanwhile, realizes the load monitoring of output quantity and the feedback monitoring of PWM output current;
Be connected with arm processor communication interface modules, realize the exchanges data between communication interface and arm processor;
The FPGA being connected with arm processor, the initialization configuring by the information realization reading in configuring chip in the time powering on;
The PCI bridging chip being connected with FPGA, the data transmission that FPGA is received, also can be by the data transmission from pci bus to FPGA to PCI bridging chip;
Described PCI bridging chip is connected with pci bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410473053.5A CN104199366A (en) | 2014-09-16 | 2014-09-16 | Control and communication port expansion module of godson 2F processor |
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| CN201410473053.5A CN104199366A (en) | 2014-09-16 | 2014-09-16 | Control and communication port expansion module of godson 2F processor |
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| CN104199366A true CN104199366A (en) | 2014-12-10 |
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Cited By (4)
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| CN107290588A (en) * | 2017-05-03 | 2017-10-24 | 芯海科技（深圳）股份有限公司 | A kind of system of high-precision multithreading measurement frequency |
| CN108828999A (en) * | 2018-06-19 | 2018-11-16 | 南京恩瑞特实业有限公司 | The generalization radar servo system of " building block system " combination can be achieved |
| CN109596088A (en) * | 2018-10-17 | 2019-04-09 | 江苏联能电子技术有限公司 | The program-controlled strain measurement system of sound state |
| CN113138650A (en) * | 2021-04-29 | 2021-07-20 | 山东英信计算机技术有限公司 | CPLD PCI equipment hot reset circuit, method, system and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107290588A (en) * | 2017-05-03 | 2017-10-24 | 芯海科技（深圳）股份有限公司 | A kind of system of high-precision multithreading measurement frequency |
| CN108828999A (en) * | 2018-06-19 | 2018-11-16 | 南京恩瑞特实业有限公司 | The generalization radar servo system of " building block system " combination can be achieved |
| CN109596088A (en) * | 2018-10-17 | 2019-04-09 | 江苏联能电子技术有限公司 | The program-controlled strain measurement system of sound state |
| CN113138650A (en) * | 2021-04-29 | 2021-07-20 | 山东英信计算机技术有限公司 | CPLD PCI equipment hot reset circuit, method, system and readable storage medium |
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