KR100293562B1 - Method for displaying error of modem - Google Patents

Abstract

PURPOSE: A method for displaying an error of a modem is provided to diagnose the error of the modem and correct the error easily, respectively. CONSTITUTION: In an error displaying method of a modem for sensing an error generation state and displaying a generation or not of an error through an error displaying unit, error information including a kind of an error generated when an error is generated and the generation number of kinds of errors is stored in an internal memory of a micro processor. The stored error information is converted into a signal in accordance with a pre-set protocol and controlled for being displayed on the display unit. The error information may be converted into a signal in accordance with a pre-set protocol and outputted to a communication path of the modem. The signal includes a value for displaying a generated error kind, a value for displaying the generation number of kinds of errors, a preamble, and postamble.

Description

How to display the modem error {METHOD FOR DISPLAYING ERROR OF MODEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication modem, and more particularly to a communication modem that detects an error occurrence state such as a communication error or a self-circuit error and displays the occurrence of the error through its own error display LED (Light Emitting Diode). It is about.

With reference to the accompanying drawings, the configuration and operation of a modem that detects an error occurrence state such as a communication error or an error in its own circuit and indicates the occurrence of the error through an LED for error display will be described.

1 is a schematic configuration diagram of a general error display communication modem. Referring to Figure 1, the modem is a microprocessor 30 for controlling the overall operation of the circuit, the communication channel interface unit 10 for transmitting and receiving data on the communication path, the LED driver 40 for displaying an error with the LED 50, and the rest It consists of 20 non-communication circuits.

In the above-described modem, the microprocessor 30 continuously checks the data transmission / reception state of the communication channel through the communication channel interface unit 10 and the operation state of the non-communication circuit unit 20 so that the LED 50 emits light through the LED driver 40 when an error occurs. By controlling, the error occurrence status is displayed.

The error-related operation of the microprocessor 30 is an operation of inspecting various components such as ROM, RAM memory, and LED driver 40 provided in the communication interface unit 10 or the non-communication circuit unit 20 when the initial power is turned on, and the data communication. It can be divided into the operation of checking the presence or absence of various errors related to communication. Error-related actions are defined in the V.42 protocol of the Convention Committee International Telegraph and Telephone (CCITT) protocol. It may be made according to the Micro Networking Protocol (MNP) of Microcom.

However, in the above error display method, the error display LED 50 normally provided to a device such as a communication modem displays only whether or not an error has occurred. Therefore, when the error occurs, error information such as the occurrence portion and the number of occurrences of the error cannot be obtained. Therefore, in order to identify the exact cause of the error, probing all the circuit parts that can generate an error has required a lot of time and effort to diagnose and correct the error.

In a communication device having a complicated circuit configuration, the microprocessor can self-diagnose each part of the circuit programmatically according to the above error-related protocol. In a device that does not include a liquid crystal display (LCD) or a monitor, There is no way to display the diagnostic results. Therefore, for debugging, each part of the circuit must be checked by hardware, and in order to know the diagnosis result of the microprocessor, it is inconvenient to emulate a program by connecting a device such as a MDS (Microprocessor Development System).

Accordingly, an object of the present invention is to provide an error display method that can facilitate error diagnosis and correction of a modem.

In order to achieve the above object, the present invention is characterized in that the error information, such as the type and number of errors occurred when the error occurs in the internal memory to output through the LED driver or communication path according to a predetermined protocol.

1 is a schematic configuration diagram of a general error display communication modem

2 is a frame diagram illustrating an error indication output signal of a microprocessor according to an exemplary embodiment of the present invention.

3 is an exemplary diagram of an error display output signal frame according to FIG. 2;

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and it is understood that such specific details may be changed or changed within the scope of the present invention. It will be self-evident to those of ordinary knowledge.

Modem according to an embodiment of the present invention in the configuration and operation as shown in Figure 1, the microprocessor 30 continues the data transmission and reception state of the communication channel through the communication channel interface unit 10, the operating state of the non-communication circuit unit 20 When the error occurs by controlling the LED 50 to emit light through the LED driver 40 to display the error occurrence state, and also the occurrence area and the number of occurrences of the error diagnosed through the LED driver 40 as shown in FIG. It converts to pulse train and outputs it so that error state can be probed externally.

2 is a frame diagram illustrating an error indication output signal of a microprocessor according to an exemplary embodiment of the present invention. 2 shows that an error indication output signal frame is output at a predetermined time T interval. As shown in Fig. 2, at the beginning of the error indication output frame, there is a 1-byte long preamble designated to a preset value according to a predetermined protocol to indicate the start of each frame. LEN is output after the preamble and indicates the total number of error types. Since LEN is 1-byte in length, it can have a value from 0 to 255, and up to 255 error types can be displayed in one frame. The n error types that are output following LEN are numeric values representing the type of the preset error, and the error count value following the error type is the total number of occurrences of the preceding error types. Since the length of the error count is 1-byte, if the error count value exceeds 255, the error count value is output as 255, the maximum value. The FCC (FrameCheck Code) value is a frame error judgment code and a postamble, which is a two-complementary value of LEN plus the nth error count, and is used for error detection of frame data. Meanwhile, the predetermined time T interval shown in FIG. 2 is designated as a value within 10 msec in one embodiment of the present invention.

On the other hand, Table 1 shows an example of an error table showing an error type and an error occurrence area according to an error type value according to a predetermined protocol.

Error type Error type and location One Channel reception framing error 2 Channel received packet error 3 Channel ACK not received error 4 Circuit part 1 error 5 Circuit part 2 error 6 Circuit part 3 error 7 Circuit part 4 error :: Other

An error table including the types of errors occurring when an error occurs and the number of occurrences of the error types shown in Table 1 is stored in the internal memory of the microprocessor. The error information thus stored is converted into a signal according to a protocol having a form of an error frame shown in FIG. 2 and output through the LED 50.

Hereinafter, an example of a frame according to the error table of FIG. 2 and Table 1 will be described with reference to the accompanying drawings. 3 is an exemplary diagram of an error display output signal frame according to FIG. 2. The frame shown in FIG. 3 shows a framing error on a total of 13 communication reception results and a total of 5 circuit part 1 errors as a result of diagnosing each part of a circuit on a predetermined error table as shown in Table 1. The error occurrence status is a transmission frame.

At the beginning of the frame there is a preamble to signal the beginning of each frame. LEN is currently 0x02 because of the total number of error types. The error type output after LEN is 0x00, which means that it is the first error type. That is, "communication channel reception framing error" shown in Table 1. The error count following the error type is 0x0d, which means that the total number of occurrences of the first error type is 13 total. Since the error type is 0x03, it means "fourth error type" and therefore "circuit part 1 error". The error count value is 0x05, which means that the fourth error type occurs five times in total. The following FCC value is 0xE8 since 0x02, 0x00, 0x0d, 0x03 and 0x05 are added together, that is, two's complement of 0x17.

The frame as described above is continuously transmitted through the LED output port. Accordingly, the LED 50 blinks to transmit an error occurrence state. Then, when the user probes the LED output port to diagnose the error occurrence, The number of error occurrences can be detected.

In addition, the frame as described above may be transmitted at predetermined time intervals through a communication path. Accordingly, the user may detect the output signal of the communication path for diagnosing the occurrence of an error.

As described above, the present invention stores error information such as the type and number of errors generated when an error occurs in the internal memory and outputs it through an LED driver or a communication channel according to a predetermined protocol, thereby facilitating error diagnosis and correction of a modem. There is an advantage.

Claims (5)

In the error display method of the modem for detecting the error occurrence status and displaying the presence or absence of the error through the error display, Storing error information including a type of an error occurring when the error occurs and a frequency of occurrence of the error type in an internal memory of a microprocessor; And converting the stored error information into a signal based on a preset protocol and controlling the stored error information to be output to the display unit. The error display method of claim 1, further comprising converting the error information into a signal according to a preset protocol and outputting the signal to a communication path of the modem. The error display method according to claim 1, wherein the signal according to the preset protocol includes a value indicating a type of error occurring, a value indicating a frequency of occurrence of the error type, and a preamble and a postamble. The error display method of claim 1, further comprising: probing an output port to the lamp to detect error information. In the error display method of a modem for detecting the error occurrence state by the microprocessor to indicate whether the error occurs through the error display lamp, Storing error information, such as the type and number of occurrences of an error, generated in the microprocessor in an internal memory of the microprocessor; Converting the stored error information into a digital signal according to a preset protocol and controlling the stored error information to be output to the lamp driver; And detecting error information by probing the output port to the lamp.

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