JPS5953947A - Input data confirming system - Google Patents

Abstract

PURPOSE:To discriminate easily normalness of an input data, by adding a pattern from a pattern generating circuit, to an input data, transferring it to a data processing part, and discriminating it by the data processing part. CONSTITUTION:When an input data is inputted through a bus 9 to a digital input 11, a pattern P is added to the high rank side or the low rank side of the input data D and is set to a register 5. Subsequently, when an input part 11 is subjected to access by address information from a data processing part 1, a controlling circuit 3 sends a control signal, and opens a gate circuit 4. As a result, the set content of the register 5 is sent to the processing part 1 throgh a bus 2. Subsequently, when the processing part 1 discriminates a pattern P added to the input data D, and discriminates it as a fixed pattern from the input part, it is decided that the input part 11 executes its operation correctly, and its data D is processed.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an input data verification method in which a data processing unit verifies the normality of important human data input via a digital input unit.

PRIOR ART AND PROBLEMS In conventional data processing devices, the data processing unit directly reads and processes human data via the digital input unit via a lotus, and parity checks are not performed. There wasn't. That is, data manually entered into the digital input section from the outside is read by the data processing section by specifying address C in the digital input section and via the lotus, and there is generally no checking function between them. However, if the human data from the outside has content that is important for system control, if the data processing unit reads the wrong data due to incorrect access, a serious error will occur.

OBJECTS OF THE INVENTION The present invention provides a method for easily checking whether or not there is a zero value from the accessed digital input section when a data processing section accesses the digital input section and reads input data. The purpose is to Examples will be described in detail below.

Embodiment of the invention FIG. 1 shows a main part of the embodiment of the invention.
2 is a data processing section, 2 is a lotus, 3 is a control circuit including an atrestecoder, etc., 4 is a game circuit that takes in data from the digital input section to the lotus 2 side, 5 is a register, 6.7
8 is a selector, 8 is a pattern generation circuit, 9 is an input data bus, 1o is a memory, and 11 is a digital input section. The pattern generation circuit 8 generates a fixed pattern, and has a configuration that allows the pattern contents to be changed as necessary. Also, selector 6.7 is used to select whether to apply the fixed pattern to either the upper side or the lower side of the human data, and is omitted if it is determined that one side is to be applied to the fixed pattern. You can also do that.

Human data is input to the digital input section 11.
When input via , it is selected by selector 6.7 and
For the input data D shown in (al) of FIG. 2, a pattern P is added to the upper or lower side of the input data D and stored in the register 5, as shown in fbl or (C). When the digital input unit 11 is accessed by the address information from the data processing unit 1, the control circuit 3 outputs a control signal that opens the gate circuit 4. As a result, the set contents of the register 5 are transferred via the lotus 2. The data is read by the data processing section 1.

The data processing section 1 identifies the pattern I added to the input data D, and determines that it is a fixed pattern from the digital human power section 11, indicating that the digital input section 11 has operated correctly for the input data D. It is determined that the data is correct, and that one piece of human data is processed. The hit configuration of this fixed pattern (■) can be selected by considering the width of the bus 2. For example, if the input data D has an 8-bit configuration, the width of the bus 2 is 16 bits 1-. Then, the fixed pattern P can be set to 8 hits. Note that it is of course possible to perform transfer for each hide instead of transferring the pattern P including the J-added pattern P all at once in parallel, and in this case, restrictions on the pattern configuration are reduced depending on the lotus width.

If there are multiple digital input units 11 connected to the lotus 2, by assigning a pattern of the pattern generation circuit to each digital input unit, it is possible to determine whether the data is from the digital input unit accessed from the pig processing unit 1. can be easily identified.

In remote monitoring and control systems, etc., control information is sent based on input data, and the data processing unit may receive incorrect data processing results due to malfunction of the digital input unit or address error from the data processing unit. However, as mentioned above, by adding a fixed pattern to the digital input section, the data processing section can check the compactness of the digital input section and prevent incorrect data processing. can be prevented.

As described in detail, the present invention includes a pattern generation circuit 8 provided in the digicle human power section 11, and a pattern from the pattern generation circuit 8 added to input data and transferred to the data processing section 1. This is important because the data processing section 1 can check the I' addition pattern and identify whether the digital input section accessed by the data processing section 1 is actually the data from the digital long sword 91i. This has the advantage that incorrect processing will not be performed even on human-powered data. Therefore, even in a data processing apparatus that does not have a data checking function such as a parity check, it is possible to check the confidentiality of input data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main part of the present invention, and FIG. 2 is an explanatory diagram of input data and additional patterns. 2 is a data processing section, 2 is a lotus, 3 is a control circuit, 4 is a gate circuit, 5 is a register, 6.7 is a selector, 8 is a pattern generation circuit, 9 is an input data lot, and 10 is a memory. Patent applicant: Fujitsu Ltd. Representative Patent Attorney Gobe Tamamushi and 3 others

Claims (1)

[Claims] In an input data confirmation method that has a data processing section connected to a digital input section via a bus, and confirms the normality of data input through the digital input section, a pattern generation circuit is provided in the digital input section. By adding the pattern from the pattern generation circuit to the input data input from the outside and transmitting it to the data processing section, the data processing section checks the pattern added to the input data. An input data confirmation method characterized by confirming the normality of the input data.