CN102609076A - USB (universal serial bus) serial port debugger - Google Patents
USB (universal serial bus) serial port debugger Download PDFInfo
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- CN102609076A CN102609076A CN2012100493226A CN201210049322A CN102609076A CN 102609076 A CN102609076 A CN 102609076A CN 2012100493226 A CN2012100493226 A CN 2012100493226A CN 201210049322 A CN201210049322 A CN 201210049322A CN 102609076 A CN102609076 A CN 102609076A
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Abstract
A USB (universal serial bus) serial port debugger belongs to the technical field of computers, and is a tool for debugging an objective circuit board in a research and development process for electronic products with embedded microcontrollers. The USB serial port debugger comprises a USBA interface, a USB to serial port conversion circuit, a TTL (transistor-transistor logic) level to RS-232 level conversion circuit, an RS-232 level signal interface, a 5V to 3.3V conversion power circuit, a TTL level signal serial port, a 5V to 3.3V conversion power output interface and a USB to serial port conversion circuit power supply jumper switch. Compared with the prior art, the USB serial port debugger is more convenient in use.
Description
Technical field
The present invention relates to field of computer technology, is a kind of in the electronic product R&D process that embeds microcontroller, is used for the instrument of debug target circuit plate, relates in particular to a kind of AccessPort device of USB interface.
Background technology
In the electronic product that embeds microcontroller; Usually need debug the program of moving in the microcontroller; Most of MCS-51 Series of MCU is supported asynchronous serial communication mouth (UART; Be called for short serial ports) carry out program download and debugging, the patent No. is that the Chinese utility model patent of ZL03247532.2 discloses a kind of integral type USB nine-pinned serial port converter, comprises USBA public access mouth, converter circuit plate and nine needles serial port.When this invention is used to debug the electronic product that embeds microcontroller, require the objective circuit plate to adopt the serial ports of RS-232 level, and most electronic product only provide the serial ports of Transistor-Transistor Logic level in order to practice thrift cost, therefore this invention and be not suitable for this environment; Secondly, in the development of electronic product, mainly carry out functional verification, for simplified design, the objective circuit plate does not design complete power supply, and digital circuit power supply interface only is provided, like 5V or 3.3V; The 3rd, also need the rs 232 serial interface signal of Transistor-Transistor Logic level be converted to the rs 232 serial interface signal of RS-232 level sometimes.And existing invention does not have a kind ofly can reach above-mentioned all requirements simultaneously.
Summary of the invention
The technical matters that the present invention will solve provides a kind of electronic product debugging acid---USB serial port debugger easy to use in R&D process that embeds microcontroller that is applicable to, overcomes the deficiency of prior art.For solving this technical matters, the present invention adopts following technical scheme:
USB AccessPort device comprises that USBA interface, USB change serial port circuit, Transistor-Transistor Logic level changes RS-232 level circuit, RS-232 level signal interface, comprises that also 5V changes 3.3V power circuit, Transistor-Transistor Logic level signal serial ports, 5V and 3.3V power output interface, USB changes serial port circuit power supply jumper switch.Row's pin that described Transistor-Transistor Logic level signal serial ports employing spacing is 100Mil is drawn; It is that row's pin of 100Mil is drawn that said 5V and 3.3V power output interface also adopt spacing; Described USB changes serial port circuit power supply jumper switch and is installed in the usb bus power pins between the power pins of USB commentaries on classics serial port chip (like FT232RL).
When the debug target circuit plate, can use the mode of Du Pont's line, easily the 5V on the USB AccessPort device and 3.3V power output end are connected to the 5V or the 3.3V power input of objective circuit plate through fly line; Also can pass through the serial ports of the mode of fly line, be connected to the serial ports of the Transistor-Transistor Logic level signal of objective circuit plate the Transistor-Transistor Logic level signal; In the time need converting the rs 232 serial interface signal of objective circuit plate Transistor-Transistor Logic level the rs 232 serial interface signal of RS-232 level into; Only need to break off USB and change serial port circuit power supply jumper switch; And, be connected to the serial ports of the Transistor-Transistor Logic level signal of USB AccessPort device, the serial ports of the RS-232 level signal of USB AccessPort device be connected to the equipment of other RS-232 level signal through fly line with the serial ports of the Transistor-Transistor Logic level signal of objective circuit plate.
The present invention is applicable to that the electronic product development that embeds microcontroller carries out program debug, uses more convenient.
Description of drawings
Fig. 1 USB serial ports structured flowchart
Fig. 2 USB serial port circuit schematic diagram
Fig. 3 USB serial ports pcb board top layer wiring diagram
Fig. 4 USB serial ports pcb board bottom cloth line chart
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention.
Among Fig. 1; USBA interface (1), USB change serial port circuit (2), Transistor-Transistor Logic level changes RS-232 level circuit (5), RS-232 level signal interface (4), and 5V changes 3.3V power circuit (8), Transistor-Transistor Logic level signal serial ports (3), 5V and 3.3V power output interface (6), USB changes serial port circuit power supply jumper switch (7).
J100 is the USBA interface among Fig. 2, selects the general public head that can directly insert computer USB interface; J101 is that USB changes serial port circuit power supply jumper switch, and can select pin-pitch is row's pin of 100Mil; J102 is a Transistor-Transistor Logic level signal serial ports, and can select pin-pitch is row's pin of 100Mil; J103 is 5V and 3.3V power output interface, and can select pin-pitch is row's pin of 100Mil; P100 is a RS-232 level signal interface, but the female head of choice criteria DB9; U100 is that 5V changes the 3.3V power circuit, can select ASM1117-3.3 monolithic integrated stable voltage circuit; U101 is that USB changes serial port circuit, can select the FT232RL chip; U102 is that Transistor-Transistor Logic level changes the RS-232 level circuit, can select the SP3243 chip; C101, C100 selects the 27P/10V patch capacitor, C102, C103, C104, C105, C106, C107, C108, C109 selects the 0.1UF/10V patch capacitor, and C110 selects the 10UF/10V alminium electrolytic condenser; D100 selects the paster LED light emitting diode; F100 selects 0.5A insurance resistance; R100, R101 selects the 6.8k1/8W Chip-R; Y100 selects the passive crystal oscillator of 12MHZ.
Fig. 3 is a pcb board top layer wiring diagram, adopts large tracts of land ground connection to apply copper, strengthens antijamming capability.
Fig. 4 is a pcb board bottom cloth line chart, adopts large tracts of land ground connection to apply copper, strengthens antijamming capability.
Claims (1)
1.USB the AccessPort device comprises that USBA interface, USB change serial port circuit, Transistor-Transistor Logic level changes RS-232 level circuit, RS-232 level signal interface, comprises that also 5V changes 3.3V power circuit, Transistor-Transistor Logic level signal serial ports, 5V and 3.3V power output interface, USB changes serial port circuit power supply jumper switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100493226A CN102609076A (en) | 2012-02-29 | 2012-02-29 | USB (universal serial bus) serial port debugger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100493226A CN102609076A (en) | 2012-02-29 | 2012-02-29 | USB (universal serial bus) serial port debugger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102609076A true CN102609076A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100493226A Pending CN102609076A (en) | 2012-02-29 | 2012-02-29 | USB (universal serial bus) serial port debugger |
Country Status (1)
| Country | Link |
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| CN (1) | CN102609076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106649185A (en) * | 2016-12-10 | 2017-05-10 | 中国船舶重工集团公司第七六研究所 | RS232/422/485 serial module based on USB interface |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743918Y (en) * | 2004-11-25 | 2005-11-30 | 重庆工学院 | Industrial field multichannel signal tester with multiple data transmission interface |
-
2012
- 2012-02-29 CN CN2012100493226A patent/CN102609076A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2743918Y (en) * | 2004-11-25 | 2005-11-30 | 重庆工学院 | Industrial field multichannel signal tester with multiple data transmission interface |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106649185A (en) * | 2016-12-10 | 2017-05-10 | 中国船舶重工集团公司第七六研究所 | RS232/422/485 serial module based on USB interface |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |