TWM265715U - USB development tool with three USB connection terminals - Google Patents

Description

M265715

[Technical field to which the new type belongs] This creation relates to a development tool for USB, a USB development tool with three USB connection terminals, and can be used for the USB circuit simulator function and the USB search function. [Prior art] It is known that the stand-alone USB circuit simulator (ICE) must be connected to at least the terminal, so as to enter the SUSB circuit simulation operation, and the connected USB searcher (Inspector) also needs at least three 1} ^ connect ° Only in this way can the USB packet detection operation be carried out. If the above tool is used, at least 5 USB connections must be used. ^ When developers are debugging, this work Λ ': / f Inconvenience. / 、 The creator of the book in the book has the above considerations: 2 works _ 1 developer with three USB connection terminals _Developer 1 think 2 and the USB circuit simulator function and the USM search engine function in a single '' On the boat. [New content] The purpose of this creation is to provide a development tool and merge USB circuits into a single tool. The USB converter function and USB search function with three USB connection terminals To create the above purpose of the USB development tool of the connection terminal to achieve the cost ’this creation provides a USB with three USB which can simultaneously provide USB circuit simulation

M265715

Device function and USB search function, the USB development tool system includes the first USB connection terminal, the second USB connection terminal, and the third USB connection terminal. It compares multiple external electronic devices with the internal of the USB development tool. ^ The roads are electrically connected to each other; the USB circuit simulator is built into the USB development tool; the USB detector is built into the USB development tool; the USB core is used to process the low-level USB protocol, and the transaction is received when received (Transaction) The data is transmitted to the interface control line; the interface control line is connected to the USB circuit simulator, the USB detector and the USB core, and when the USB circuit simulator is enabled, the USB detector is disabled, and when the USB When the searcher is enabled, the circuit simulator is disabled (D isab 1 e). In order to make those skilled in the art understand the purpose, characteristics, and effects of this creation, the following specific embodiments and the accompanying drawings are used to explain this creation in detail as follows. [Embodiment] The first figure shows the architecture diagram of a USB development tool with three USB connection terminals. The main feature of the USB development tool 10 with three USB connection terminals is that only three USB connection terminals are used to provide the USB Circuit Simulator (lCE) function and the USB Inspector function. The following will reveal the technical composition of the development tool 10 of this creation. Among them, the first USB connection terminal 11, the second usB connection terminal 12, and the second USB connection terminal 13, the three [JSB connection terminals 11, 1 2, 1 3 all electrically connect the internal circuits of the plurality of external electronic devices 2 1, 2 3, 2 5 and the USB development tool 10 to each other. u s β nucleus

M265715 4. Creation instructions (3) The heart 1 4 series processes the low-level u S B protocol and transmits the transaction (T r a n s a c t i ο η) data to the interface control line 丨 5 when receiving. The USB circuit simulator 16 of this creation is built in the USB development tool 10, and similarly, the 'USB detector 17' is also built in the USB development tool 10. The interface control circuit 15 connects the USB circuit simulator 16 and the USB detector 14 to the USB core 14 respectively. The specific devices of the plurality of external electronic devices 21, 23, and 25 may be a first host (Host), a second host, and an mb device (USB device), respectively. Furthermore, the USB development tool 10 still includes a first physical layer circuit M for connecting the first USB connection terminal 16 and the USB core 14 together; and a second physical layer circuit 19 for connecting the second USb. Terminal 13, the third USB connection terminal 15, the USB circuit simulator 16 and 1 ^ detector 17 are connected together. The operating status of the USB development tool 10 of this creation can be divided into three cases, please refer to the USB shown in the second figure The circuit block diagram of the circuit simulator, and the circuit block diagram of the USB searcher in the third figure, are now explained as follows: [The first state is the state of the us B circuit simulator alone] At this time, the interface The control circuit 15 disables the USB detector 17 and disables the USB circuit simulator 16 only. The first physical layer circuit 18 receives and transmits USB D + and D- signals to the first host 21, and the USB core 14 processes the low-level USB protocol (pro t0 c〇i), and transmits the transaction (Transact ion) when receiving The data is transmitted to the interface control line 15 and, at the same time as the transmission, the data of the interface control line 5 is also used as the U s B protocol.

Page 7 M265715 Fourth, the creative description (4) (Protocol) method is transmitted to the first host 21. The USB circuit simulator 16 will act according to the command transmitted by the interface control line 15. When a break is encountered, the data of the internal register of the USB circuit simulator 16 will be sent to the interface control line. 1 5 teleport. [The second state is the state where the USB Scanner is used alone] At this time, the interface control line 15 will disable the USB circuit simulator 16 and only the USB Scanner 17 will operate. The first host 21 issues a command to make the USB searcher 17 enter the Record mode. When there is any USB packet activity between the first host 23 and the USB device 25, the first physical layer circuit 19 will transfer the USB D + 'D-The signal is taken down, and the data of this packet will be recorded in the memory (such as SRAM) of the USB Scanner 17. In case (1), the memory space of the memory is full; in case (2), the user issues a stop record command; in this case (1) and case (2), the USB packet data will be returned Passed to the first host 2 1. [The third state is the use of the USB circuit simulator with the USB detector.] If the USB circuit simulator 16 is in Free Run and the USB pain detector 17 is set to Trigger, this As long as the USB detector 17 meets the trigger point, when the buffer is filled (ρ u 1 1) or it is manually stopped, the packet will be returned immediately. If it is located in the USB circuit simulator 16 with a break point, then the USB detector 17 returns the USB packets that occurred before and after the break point, and returns the internal register value of the USB circuit simulator 16 pass.

Page 8 M265715 IV Creation Instructions (5) In the third picture, the main functions of the SIE-Serial Interface Engine are as follows. It is responsible for the reception and processing of token packets, which belongs to the bit level. Detect the occurrence of Synchronization Sequence Field in the data stream, and filter and delete it. Conversion from NRZI to NRZ. Bit stuffing (Bit Stuffing) extraction and filtering, removal. The bus timeout (Bus T ime 〇 u t) monitors and generates a USB reset (UsbReset) signal. Check code of CRC5 and CRC16. Deposit from Serial to Parallel. Distinguish the received Token Packet and save the Token 'Device Address' and the Current Endpoint for the subsequent modules. If E〇P is received correctly, RecvVUTkn will be generated to indicate that an error-free § Token Packet has been received. The merit and remarkable effect of this creation are to combine the USB circuit module and the USB search device into one, and to combine and use the USB port (prt). Only three USB connection terminals are required for this creation. Three functions can be satisfied, the first function of which is used alone as a USB circuit simulator, the function of which is used solely as a USB scout, and the third function of which is used both. This creation can be simple and versatile. For USB peripheral products, this creation provides a reliable and convenient development tool. Although this creation has been disclosed with specific embodiments as above, the specific embodiments disclosed are not intended to limit this creation. Anyone familiar with this art can do various things without departing from the spirit and scope of this creation: Retouching, its changes and retouching are all within the scope of this creation. The scope of protection of this creation shall be defined by the scope of the attached patent application as follows:

IM8 page 9 M265715 IV. Creation instructions (6) 〇〇 ΙΙΙΙ page 10 M265715 Simple illustration of the diagram [Simplified illustration of the diagram] The first diagram shows the architecture diagram of the USB development tool with three USB connection terminals for this author. The second figure shows a circuit block diagram of the USB circuit simulator of the first figure. The third figure shows the circuit block diagram of the USB finder in the first figure. [Description of main component symbols] 10 USB development tools 11 First USB connection terminal 12 Second USB connection terminal 13 Third USB connection terminal 14 USB core 15 Interface control line 16 USB circuit simulator 17 USB detector 18 First physical layer Line 19 Second physical layer line 2 1, 2 3, 2 5 External electronic device

Claims (1)

M265715 V. Application scope 1. A USB development tool with three USB connection terminals, which can provide both USB circuit simulator function and USB searcher function. The USB development tool includes: a first USB connection The terminal, a second USB connection terminal, and a third USB connection terminal are all electrically connected to a plurality of external electronic devices and internal lines of the USB development tool; a USB circuit built in the USB development tool; Emulator; a USB searcher built into the USB development tool; a USB core that handles low-level USB protocols and transmits transaction data to an interface control line when receiving; the interface control line, It is connected to the USB circuit simulator, the USB scouter and the USB core respectively, and when the USB circuit simulator is enabled, the USB scouter is disabled, and when the USB scouter is enabled , Disable the circuit simulator (Disable). 2. The USB development tool according to item 1 of the scope of patent application, wherein the USB development tool further comprises: a first physical layer circuit for connecting the first USB connection terminal with the USB core; a second entity The layer circuit is to connect the second USB connection terminal, the third USB connection terminal, and the USB circuit simulator to the USB searcher. 3. The USB development tool described in item 1 of the scope of patent application, wherein the plurality of external electronic devices are a first host (Η s t), a second host, and a USB device (USB Device). Page 12