JP3094932B2 - Data test method between devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data test method between devices, and more particularly, to a program and a data test method for a device which performs data transfer with another device.

[0002]

2. Description of the Related Art In a device for transferring data to and from another device, confirmation of data information transferred to and from another device has conventionally been performed by connecting an emulator or by setting an external control terminal in the device. This is done by dumping buffers located in memory using the monitor function.

[0003] Further, for example, Japanese Patent Application Laid-Open No. Hei 5-325039 discloses a POS device in which a monitor function is incorporated in a POS device body so that a measuring device such as a monitor does not have to be carried. In a POS terminal having a display device in a main body, it is possible to connect and use an attached device having an output function, and a monitoring mode switching unit is provided;
There has been proposed a configuration of a POS device with a monitor function including means for displaying information exchanged between a POS device and an attached device on a display device by switching the monitoring mode switching means to a monitoring mode as necessary. . This is to switch the monitor display to a data bus with another device in the monitoring mode.

[0004]

However, when the above-mentioned emulator is used, there is a problem that it takes a lot of man-hours to secure an installation place and to carry the emulator.

In the conventional method of checking by dumping a buffer, when data is transmitted to another device, the data is stored in a transmission buffer, and then transmission is started when transmission becomes possible. However, it does not always guarantee that the data has actually been transmitted. Similarly, in the case of reception, a state in which data is not stored in the buffer even though data is transferred from another device may be considered.

As described above, there is a case where a difference occurs between the actual data transmission / reception and the contents of the buffer dump. Therefore, in the confirmation by the buffer dump, whether the device to be debugged is defective or a problem on the other device side. However, there is a problem that it may not be possible to separate the data.

Further, in the method disclosed in Japanese Patent Laid-Open No. Hei 5-325039, actual data can be confirmed. However, while switching to the data bus, the monitor mode is disabled and the data is confirmed. However, it was difficult to change the state from the external control terminal.

Accordingly, the present invention has been made in view of the above problems, and has as its object to enable easy debugging of an apparatus without using an emulator and to check external data while confirming data with another apparatus. It is an object of the present invention to provide an inter-device data test method that enables a control terminal to change a state.

[0009]

In order to achieve the above object, the present invention connects a data bus for communication with another device and an output bus for monitor debugging of the own device to a selector, and outputs the output of the selector to a driver / driver. Connected to a receiver, output to an external control terminal via a connector and displayed on the external control terminal, input from the external control terminal is input from the connector into the CPU via the driver / receiver, and the monitor means is identified. The monitor means includes means for controlling the selection of the selector, the input and output from the external control terminal are independent of each other, and the selector is a The monitor processing function is enabled when a bus is selected.

[0010]

Embodiments of the present invention will be described below. In a preferred embodiment of the present invention, a data bus for communication with another device (12, 13 in FIG. 1) and an output bus for monitor debugging (11 in FIG. 1) are connected to input terminals of a selector (7 in FIG. 1). Connected to the monitor program (21 in FIG. 1), a selector (7 in FIG. 1) via a selector selection bus (14 in FIG. 1) in addition to a normal monitor function.
The output of the selector (7 in FIG. 1) is connected to the driver / receiver (8 in FIG. 1) and connected to the external control terminal (1 in FIG. 1) via the connector (9 in FIG. 1).
0) is displayed.

On the other hand, an input from the external control terminal (10 in FIG. 1) is transmitted from the connector (9 in FIG. 1) via the driver / receiver (8 in FIG. 1) to the SCU in the CPU (4 in FIG. 1).
(Serial Control Unit) (5 in FIG. 1), and the monitor program (21 in FIG. 1) identifies and performs a process according to the input information.

In the embodiment of the present invention, the input and output from the external control terminal (10 in FIG. 1) are independent,
For example, even if the selector (7 in FIG. 1) selects and outputs the data bus for other device communication (12 and 13 in FIG. 1), the monitor function is effective. That is, the state can be changed by inputting an input command or the like to the monitor program (21 in FIG. 1).

As described above, in the embodiment of the present invention, since the data information with the other device is displayed on the external control terminal and the monitor function is enabled, the program debugging method becomes widespread. Another advantage is that debugging can be easily performed without connecting a debugging device such as an emulator.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a diagram showing the configuration of one embodiment of the present invention. Referring to FIG. 1, in one embodiment of the present invention, a writable nonvolatile memory including a monitor program 21 having a selector switching process and a monitor function for debugging is provided in an apparatus 1 for performing data transfer with another apparatus. (Random access memory) 3 including a FROM (flash type read only memory) 2, a data reception buffer 31, and a data transmission buffer 32,
PU (Central Processing Unit) 4, S built in CPU 4
A CU (serial control unit) 5 is provided, and an input terminal of a selector (SEL) 7 is connected to a monitor debug output bus 11 and other device communication buses 12 and 13.

The data input from the SCU 5 of the CPU 4 is interpreted and determined by the monitor program 21, and the processing according to the input information is performed.

The other device communication bus controller 6 is connected to the internal bus 15, and the other device communication bus (data output bus 12, data input bus 13) and the monitor debug output bus 11 are connected to the selector 7. I do.

The output of the selector 7 is a driver / receiver 8
And output and displayed on the external control terminal 10 via the connector 9.

The bus selected and output by the selector 7 is determined by an input instruction from the external control terminal 10.

The operation according to one embodiment of the present invention will be described below.

Referring to FIG. 1, when the selector 7 is initialized with the selector 7 selecting and outputting the monitor debug output bus 11, the data of the monitor debug output bus 11 is supplied to the external control terminal 10. Thus, a display corresponding to the debugging is made.

During online execution, the monitor program 21
Performs an internal operation according to input information from the SCU 5.
For example, it is possible to rewrite the contents of the RAM 3 or display the contents on the external control terminal 10. Debugging is performed by performing such a monitoring process.

Here, when it is desired to check the data output value to another device in real time, the external control terminal 10
A bus change request of the selector 7 (a selection output switching request of the selector 7) is input to the other device data transfer device 1.

Input data from the external control terminal 10 is transferred from the driver / receiver 8 to the SCU 5 through the connector 9.

Based on this input information (bus change request), the monitor program 21
4, the output of the selector 7 is switched to the data output bus 12 side for connection.

In this state, when a request to output the data stored in the transmission buffer 32 of the RAM 3 occurs,
Under the control of the bus controller 6, the data output bus 1
2 to output data.

This data is transferred to another device at the same time
The signal is supplied from the driver / receiver 8 through the selector 7 to the external control terminal 10 through the connector 9 and is supplied to the external control terminal 10.
Is displayed with.

In this way, the operator can check the output data to another device from the external control terminal 10.

Similarly, with respect to the data input bus 13, the external control terminal 10 can confirm data received from another device by a bus change request to the selector 7.

In this embodiment, since the output and input from the external control terminal 10 are independent of each other, the instruction to the monitor program 21 is valid even if the selector 7 selects the data bus of another device. It is.

For this reason, in the data bus display mode with another device, an abnormal factor such as writing to the RAM 3 can be generated, and the state of the data output bus 12 and the data input bus 13 at that time can be confirmed.

In this embodiment, the output of the selector 7 is one, but it goes without saying that a plurality of outputs may be provided. Also, the FROM2 storing the monitor program 21
May be other than a flash type (batch erase type) as long as it is a nonvolatile rewritable ROM.

[0033]

As described above, according to the present invention,
When debugging data information with another device, there is an effect that actual data can be directly confirmed in real time without installing an emulator which was conventionally required.

Further, according to the present invention, since the input information for debugging is valid, the internal state of the apparatus can be changed by data to another apparatus, and the debugging method from the external control terminal can be broadened. The effect is as follows.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 Other device data transfer device 2 FROM 3 RAM 21 Monitor program 31 Receive buffer 32 Transmit buffer 4 CPU 5 SCU 6 Bus controller 7 Selector 8 Driver / receiver 9 Connector 10 External control terminal 11 Monitor debug output bus 12 To other device Data output bus 13 Data input bus from other devices 14 Selector selection bus

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Saburo Ikeda 5-7-1 Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Hiromi Atsuta 5-7-1 Shiba 5-chome, Minato-ku, Tokyo NEC (56) References JP-A-5-325039 (JP, A) JP-A-4-15791 (JP, A) JP-A-5-66961 (JP, A) (58) Fields studied (Int. Cl. ^7, DB name) G01R 31/00 G01R 31/02 G06F 11/28 G06F 15/00

Claims (2)

(57) [Claims] 1. An apparatus for performing data transfer with another device, wherein a data bus for communication with another device and an output bus for monitor debugging of the own device are connected to a selector, and an output of the selector is output and displayed on an external control terminal; The input from the external control terminal is supplied to monitoring means for controlling debugging and performs a monitoring process according to the input information, and the monitoring means further controls the selection of the selector. An inter-device data test method, wherein outputs are independent of each other, and a change in the status of the device can be set from the external control terminal while confirming data transfer with another device. 2. A data bus for communication with another device and an output bus for monitor debugging are connected to input terminals of a selector, and an output of the selector is connected to a driver / receiver and output to an external control terminal via a connector. An input from the external control terminal is displayed on the external control terminal. The input from the external control terminal is input from the connector via the driver / receiver into the CPU, and the monitor means identifies and performs a process according to the input information. Means for controlling the selection of the selector, the input and output from the external control terminal are independent of each other, and the monitor processing function is enabled even when the selector is selecting the data bus for other device communication. A data test method between apparatuses, characterized in that: