TWI361351B - Testing system of universal serial bus device and method thereof - Google Patents

Description

Sanda number: TW3459PA [Invention content] The monthly system has a general-purpose serial bus (installation, device and its side "==;=:;: USB agreement thanks to the operation coverage and cannot be effectively saved And mi re-existing = information movement: the analyzer retains the corresponding heart L: effectively * the first - computer type USB device test system 'for the device to copy the comparison test via the first month t system (Copy and The "measurement" system includes a logic analyzer (L〇gic Analyzer) and a two-Z analyzer to extract the access operation of the USB device, and the access signal is generated when the access operation is incorrect.

Bizi'S UlSe). The test fixture receives the drive signal and controls the universal input 4_eneralPurp() seInputand - i GPI0) when the pulse n is received. The level of the signal is changed from the high level to the low level to drive the first power system to terminate the copy comparison test. A method for testing a device, including stepping a step to perform a copy comparison test on the leg device; determining: = generating a pulse wave on the driving signal; and stopping the high level system by using the level of the output U_« Obvious. The above content can be more clearly understood. The following is a detailed description of the following and a detailed description of the following: 1361351 Sanda number: TW3459PA [Embodiment] General of this embodiment The test system of the serial bus (Universa 1 Sei·ia 1 Bus, USB) device provides a signal compatible with the computer system through a special test fixture to stop the copying comparison performed by the computer system when the USB device operates incorrectly (Copy And Compare) operation. Please refer to FIG. 1 and FIG. 2'. FIG. 1 is a block diagram showing a test system of a USB device according to a preferred embodiment of the present invention, and FIG. 2 is a diagram showing

The waveform of some signals in the figure. The test system 1 of the USB device is used to perform a copy and compare test on the USB device. The test system 10 of the present embodiment is stored via the USB via the computer system 120 that is programmed to perform the copy comparison test. The USB device is taken to perform a copy comparison test. In the present embodiment, the USB device is, for example, a card reader 122, which is connected to a memory card 124 having a compatible specification. The test system 1 of the present embodiment is used to access the card reader 122 and the memory card 124. The function performs a copy comparison test.

The test system 10 includes a logic analyzer (Logic Analyzer) 126, a test fixture 128, a USB protocol analyzer 130, and a computer system 132. The USB protocol analysis unit 130 is coupled to the computer system 120 and the card reader 122 via the USB 12 and 14 respectively. For the test system 1 to perform the copy comparison test, the analysis between the computer system 120 and the card reader 122 includes a USB protocol. Transmission information with data packets. The USB protocol analysis unit 130 further includes a buffer (Buffer) for temporarily storing the transmission information at a specific time before and after the corresponding operation time point at each operation time point. Computer system 132 is connected to USB 7 1361351

The Sanda number: TW3459PA protocol analysis unit 130' is used to be programmed to control the action of the USB protocol analysis unit 130 and display the corresponding analysis signal. The logic analyzer 126 is coupled to a corresponding detection pin (not shown) of the memory card 124 to detect an access operation between the card reader 122 and the memory card 124 based on the signal thereon. The logic analyzer 126 is further configured to generate a pulse p on the driving signal Sd when detecting an error in the access operation between the card reader 122 and the memory card 124. The logic analyzer 126 has, for example, a BNC connector (Bayonet-Naur Connector) for outputting the drive signal Sd through a coaxial cable. The test fixture 128 is coupled to the logic analyzer 126 and the computer system 120 to receive the driving signal Sd and the output universal input and output (General

Purpose Input and Output, GPI0) Signal S_GPI0. The preset level of the general-purpose input/output signal S_GPI0 is, for example, a high level. The test fixture 128 is further configured to control the level of the general-purpose input/output signal S_GPI0 from a high level to a low level in response to a rising edge of the pulse wave P (Ring Edge) to generate a falling edge. The computer system 120 includes a universal input/output pin (not shown) for receiving the general-purpose input/output signal S_GPI0', and the computer system 120 is programmed to respond to the falling edge of the universal input/output signal S_GPI0 received by the universal input/output pin. (Falling Edge) terminates the copy alignment test. The test system 10 of the present embodiment drives the computer system 120 to terminate the copy comparison test by detecting the access error between the card reader 122 and the memory card 124 via the path including the logic analyzer 126 and the test fixture 128. Terminating USB transfer between computer system 120 and card reader 122, and USB 12 8 1361351

Sanda number: TW345卯A • The data flow with Μ is substantially close to zero. In this way, it is possible to effectively avoid the problem that the transmission information corresponding to the operational error temporarily stored in the USB protocol analyzer 13 is overwritten by the transmission information after the time point when the access error occurs. In this way, the test system ι of the embodiment can effectively save the transmission information corresponding to the access operation error. Please refer to Section 3, which shows a detailed block diagram of test fixture 128 in Figure i. The test fixture 128 includes, for example, a single wafer system 128a and a non-volatile memory, wherein the non-volatile memory is, for example, a flash memory 128b single-chip system 128a including a universal wheel-in output, m, m processor 134 and random access memory 138. The general purpose input and output pins 3 and 133 are coupled to the logic analyzer 126 and the computer system 12A, respectively. The processor 134 is configured to be programmed to set the universal input/output pins 133 and 131 as input pins and output pins, respectively, to receive the driving signal Sd and the output general input/output signal S_GPIO. The processor 134 is further programmed to change when the general-purpose input/output pin 133 receives the pulse wave p. ^ The level of the general-purpose input/output signal S_GPIO is low. The flash memory 128b stores a program code for performing the above operation, and stores the corresponding code in the random access memory 136. Thus, processor 134 executes the code in random access memory 136 to be programmed to perform the operations described above. In the present embodiment, the test fixture 128 has substantially the same hardware structure as the card reader 122, which is different in that it includes different code codes for the included flash memory system to drive the respective executions. Different operations. As such, the test fixture 128 further includes, for example, a USB controller 138', 1361351

Three ^^: TW3459PA Compact Flash (CF) Controller 140, SmartMedia (SM) / Extreme Digital (xD) Flash Memory: Body Controller 142 and Secure Digital (Secure One or all of the Digital, SD)/Multimedia Card (MMC) flash memory controllers 144 are connected to the processor I% via an internal bus. In this embodiment, in addition to the user to drive the computer system 12 to execute the corresponding program to perform the copy comparison operation, the user further provides a software development kit such as Microsoft (Micr〇s〇ft) provided by the system program of the computer system 120. The driver development kit (DDK) tool provided by the operating system generates a driver to drive the computer system 12 to stop the copy comparison operation in response to the falling edge of the universal input/output signal s_GPI〇 received by the universal input/output pin. . Please refer to FIG. 4, which is a flowchart of a test method for a USB device according to a preferred embodiment of the present invention. First, as step (a), a computer system 120 is provided to perform a copy comparison test on a USB device. In the example, the USB device is a card reader 122 coupled to a memory card 124 of a corresponding format. Then, as in step (b), it is determined by the logic analyzer 126 whether the operation of the card reader 122 accessing the memory card 124 is erroneous; if the step (c) is performed, the logic signal 126 is outputted by the driver signal as described above. Wave P. Then, in step (d), the test fixture 128 responds to the pulse wave p to change the level of the general-purpose input/output signal S_GPI0 from the high level to the low level, and outputs the general-purpose input/output signal S_GPI0 to the computer system 12 to control the stop. Copy the comparison test.

Erda number: TW3459PA, wherein step (d) further includes the following steps, wherein in each step, the system single chip 128a copies the corresponding code in the flash memory 128b into the random access memory 136, and processes The device 134 responds to the code stored in the memory 136 to perform the corresponding operation. First, as step (dl), the system single chip 128a begins to read the corresponding code from the flash memory 128b, such as the boot code to the random access memory 136, and the processor 134 executes the random access memory 136. The code is used to start the test fixture 128. Then, in step (d2), the processor 134 is programmed to set the general-purpose input/output pin 133 as an input pin to receive the driving signal Sd<, and then, as in step (d3), the processor 134 is programmed to set the general-purpose input and output. The pin 131 is an output pin for outputting a general-purpose input/output signal s_Gpi〇, wherein the start position of the universal input wheel-out signal S_GP 10 is a high level. Then, as step (d4), the processor 134 is programmed to determine whether the general-purpose input/output pin 133 receives the pulse wave p; if the step (d5) is performed, the processor 134 is programmed to control the general-purpose input/output signal s_GPI. The level has changed from a high level to a low level. In the step (d4), if the general-purpose input/output pin I% is not receiving the pulse wave P, the step (d4) is repeatedly executed. In the step (b), if no error occurs in the access operation of the card reader 122, the step (匕) is repeated. In the present embodiment, the general-purpose input/output signal S__GPI〇 is generated by the test fixture 28 having substantially the same hardware and shape as the card reader 122 to stop the copying operation of the computer system 12〇. The case is taken as an example. However, the test fixture 128 applied in this embodiment is not limited to the card reader 1361351.

I No.: TW3459PA 1 2 2 has the same hardware structure' and can be other structures; as long as the test tool 128 can respond to the pulse wave P in the driving signal Sd to generate the corresponding general-purpose input and output signal S-GPIO The technical scope of this embodiment. In the present embodiment, the case where the USB device is the card reader 122 is taken as an example. The USB device of the present embodiment is not limited to the card reader 122 but may be other USB devices.

The test system of the USB device of this embodiment responds to the driving signal generated by the logic analyzer in response to the access operation error of the card reader by using a test fixture having substantially the same hardware structure as the card reader to be tested. General purpose input and output signals, and use it to stop the copy and compare operations performed by the computer system. In this way, the test system of the USB device of the present embodiment can effectively improve the (four) information coverage of the traditional test system that remains in the protocol analyzer corresponding to the error of the error, and cannot be effectively saved. Disadvantages, and substantially effective linkage of the usb protocol analyzer to retain the corresponding transmission resources I have been described above, and the preferred embodiment of the present invention is disclosed above, but it is not the same as the invention. Those who are knowledgeable are more versatile and retouched in the domain of the county. Accordingly, the invention is to be construed as being limited by the scope of the various patents. μ range* depends on the attached application 12 1361351

Sanda Number: TW3459PA * [Simple Description of the Drawings] Fig. 1 is a block diagram showing a test system of a USB device in accordance with a preferred embodiment of the present invention. Figure 2 is a waveform diagram of a portion of the signal in Figure 1. Figure 3 is a detailed block diagram of the test fixture 128 in Figure 1. 4 is a flow chart showing a method of testing a USB device in accordance with a preferred embodiment of the present invention. • [Main component symbol description] 10 : USB device test system 12, 14 : USB 120, 132 : Computer system 122 : Card reader 124 : Memory card 126 : Logic analyzer ' 128 : Test fixture Lu 128a. System early Wafer 128b: Flash Memory 130: USB Protocol Analyzer 131, 133: General Purpose Input/Output Pin 134: Processor 136: Random Access Memory 138: USB Controller

140, 142, 144: CF controller, SM/xD controller, SD/MMC controller 13

Claims (1)

No. 3: TW3459PA X. Patent application scope: 1. A universal serial bus (USB) device test system for copying and comparing a USB device via a first computer system (Copy and Compare The test system includes: a logic analyzer (Logic Analyzer) for detecting an access operation of the USB device, and generating a signal on a driving signal when detecting an error in the access operation of the USB device Pulse (Pulse); and a test fixture, receive the drive signal and control the level of a General Purpose Input and Output (GPIO) signal from a high level to a low level when the pulse is received. The copying comparison test is terminated by driving the first computer system. 2. The test system of claim 1, wherein the test fixture comprises: a first universal input/output pin and a second universal input/output pin respectively coupled to the logic analyzer and the a first computer system; and a processor configured to be programmed to set the first and second universal input and output pins as input and output pins respectively for receiving the driving signal and outputting the universal input and output signal The processor changes the level of the general-purpose input and output signal to a low level when the first universal input/output pin receives the pulse wave. 3. The test system of claim 1, further comprising: a protocol analysis unit, wherein the first computer system is connected to the USB device via the USB protocol analysis unit, the USB protocol analysis unit is configured to analyze the USB communication protocol between the first computer system and the USB device; 1361351 Sanda number: TW3459PA and one brother two computer system, connected to the USB protocol analysis unit, using 4 such as =::B protocol analysis unit analysis operation . The test fixture and the hybrid system have a substantially identical hardware structure. The test system described in the first paragraph of the patent application, wherein the first computer is connected to the USB device for use in the U = Test the data and compare it to the comparison = copy comparison test. The general-purpose serial bus (Universai Bus, the test method of the touch device, comprising: (a) providing - a computer system to - copy and compare the device (Copy and Compare); (b) determining the Whether an error occurs in the access operation of the USB device; (c) generating a pulse on a driving signal when an error occurs in the access operation of the USB device; and (d) responding to the pulse wave to change a general-purpose input and output (The level of the General Purpose Input and Output 'GPI0) signal changes from a high level to a low level to control the computer system to stop the copy comparison test. 7. The test method described in claim 6 of the scope of the patent, wherein the steps ( d) further comprising: (dl) starting a test fixture, the test fixture comprising a first universal input and output pin and a second universal input and output pin; (d2) setting the first universal wheel input and output pin For the input pin, connect 15 1361351 three-code number: TW3459PA to receive the drive signal; (d3) set the second universal input/output pin as the output pin to output the high-level general-purpose input and output signal; (d4) Whether the first general-purpose input/output pin receives the pulse wave; and (d5) controlling the level of the general-purpose input/output signal to change from a high level to a low level when the first universal input/output pin receives the pulse wave. 8. The test method of claim 7, wherein after the step (d4), the method further comprises: repeating the step W4) when the first input/output pin does not receive the pulse. Wherein the test method described in item 6 of the benefit range, after step (b) further comprises: repeating the execution step when no error occurs in the access operation when the USB device (b) 〇 16