JPH04126496A - Scan counter system for reception data memory - Google Patents

Abstract

PURPOSE:To simplify the processing process in a data reception processing system and to reduce the processing time by counting up the content of a counter section only when a final reception data and its succeeding reception data are matched and the reception number of times of the counter section does not reach a prescribed value. CONSTITUTION:A data storage section 1, a counter section 2, a reception data memory 3 and a reception processing means 4 are provided to each of lines in the system receiving data from plural lines periodically. The reception data memory 3 is provided with the data storage section 1 and the counter section 2, the data storage section 1 stores a final reception data and the counter section 2 stores the number of times of reception of the same data. The reception processing means 4 counts up the content of the counter section only when the final reception data and its succeeding reception data are matched and the number of times of the reception of the counter section 2 does not reach a prescribed value and uses the equipment processing means to apply reception processing only when the final reception data and its succeeding reception data are matched and the number of times of the reception of the counter section 2 reaches a prescribed value.

Description

[Detailed Description of the Invention] [Summary] Regarding the scan counter method of memory for received data, the purpose of this invention is to shorten the reception processing time by omitting the scan counter processing of the same data after reception processing. In a system that receives data from a plurality of lines, the received data memory has a data storage unit that stores the last received data and a counter unit that stores the number of times the same data has been received, corresponding to each of the lines. , and reception processing means that performs reception processing and clears the contents of the counter when the number of receptions of the same data in the counter equals a predetermined value, and by one scan of the reception data memory, the final The contents of the counter are counted up only when the received data and the next received data match and the number of receptions of the counter has not reached the predetermined value, and the last received data and the next received data are counted up. The reception processing means is configured to perform reception processing only when the reception data of the reception processing means and the reception data of the reception processing means match and the number of receptions of the counter unit is equal to a predetermined value.

[Industrial application field]

The present invention relates to a scan counter method for a memory for received data, and in particular, when receiving data via a memory, the memory is scanned and reception processing is performed while comparing the last input data and the next input data. Regarding the method of doing so.

For example, as an example of the field of application of the present invention, a method of processing received data in firmware that processes subscriber signals manually input to a telephone exchange will be described with reference to FIG. In the figure, a central exchange 63 to which a central processing unit (CPR) 62 is connected to a network (NW) 61, and a network (NW) 64 connected to this central exchange 63.
A subscriber concentration stage consisting of a line processor (LPR) 65, a plurality of transmission control means (DLC3H) 651 to 65n accommodated in the network 64, and a terminal ( TE) 661.66
2 is shown. For example, 64 lines of signals are exchanged in a multiplex mode on the signal line 67 between the NT point and the transmission control means 651.

The present invention provides, for example, the transmission control means (DLC3H) 651
65n.

However, the field of application of the present invention is not limited to the system shown in FIG. 6; when data is received via a memory, the memory is scanned and the last input data and the current input data are This method can be applied to any device as long as it performs reception processing while comparing the data.

[Conventional technology]

When receiving data via memory, there is a method of checking data reception using a scanning method. In this method, the memory is monitored at regular intervals to check whether the data received last time is different from the data received this time. When executing the scan method when there are a large number of lines, string instructions may be used in consideration of processing power. Even if a string instruction is used, if the received data is to be protected from noise, it is also necessary to check whether the same data has been received a predetermined number of times in succession.

FIG. 7 is a diagram showing the configuration of a conventional last look (LL) data section memory necessary to execute the above scanning method. As shown in the figure, the last received data of a plurality of lines is stored in the LL data section. That is,
The LL data section has the same structure as the upper memory and the received data.

FIG. 8 is a diagram showing the configuration of a conventional counter memory for protection from noise in the above scan method.

The number of consecutive receptions of the same data is counted up and stored in the counter memory for each line.

FIG. 9 is a flowchart illustrating an overview of conventional data reception processing for one line. As shown in the figure,
Conventionally, the same data has been determined using scan 0, and the number of receptions has been determined using scan 1, using separate scans. This is due to the fact that the memory for the LL data section and the memory counter section are provided separately.

Scan 0 executes string instruction 1, step 9
When the received data matches the contents of the memory above the LL data section in step 1, it is determined that the same data has been input continuously, and the LL
Scan 2 is executed without updating the contents of the upper memory of the data section. If the received data does not match the contents of the upper memory of the LL data section in step 91, it is determined that data different from the previous data has been input, and the contents of the upper memory of the LL data section are updated with new data in step 92. , clear the contents of the counter memory.

In scan 1, string instruction 2 is executed.

That is, if the value of the counter is OO in step 94, the new data is received for the first time, so in order to protect against noise, the new data is not processed and the next scan is waited for. If the counter value is not 00, it is counted up at step 95, and it is determined whether the count value has reached a predetermined value X at step 96.

If the predetermined value X has not been reached, the received data is not trusted in consideration of noise protection, and the next scan is waited for without performing any reception processing. If the predetermined value X is reached, the received data is determined to be reliable and reception processing is performed in scan 97.

[Problem to be solved by the invention]

According to the conventional data reception processing method described above, even if the same data is received consecutively after receiving the same data a predetermined number of times X and performing reception processing, the count value is not cleared and step 95 The count-up continues and is compared with a predetermined value X in step 96, but this count-up and comparison process is a wasteful process since the data reception process has already been completed. therefore,
Conventional data reception processing methods are complex and time consuming, causing a reduction in other processing capabilities.

The present invention has been made in view of the problems in the prior art described above, and aims to simplify the processing steps and shorten the processing time in a data reception processing system.

[Means to solve the problem]

FIG. 1 is a block diagram of the principle of the present invention. In the figure, 1 is a data storage section, 2 is a counter section, 3 is a memory for received data, and 4 is a reception processing means.

Data storage section 1, counter section 2, memory for received data 3
In a system that periodically receives data from a plurality of lines, the reception processing means 4 is provided corresponding to each of the lines.

The data storage unit 1 stores the final received data.

The counter unit 2 stores the number of times the same data has been received.

The received data memory 3 includes both a data storage section 1 and a counter section 2. The reception processing means 4 performs reception processing and clears the contents of the counter section 2 when the number of receptions of the same data in the counter section 2 becomes equal to a predetermined value.

By one scan of the received data memory 3, the contents of the counter section are counted only when the last received data and the next received data match and the number of receptions of the counter section 2 has not reached a predetermined value. The reception processing means performs reception processing only when the last received data and the next received data match and the number of receptions in the counter section 1 is equal to a predetermined value.

[Effect]

Only when the last received data and the next received data match and the number of receptions of the counter section 2 has not reached a predetermined value, the contents of the counter section are counted up, so that the number of receptions of the counter section 2 reaches the predetermined value Even if the same data is received continuously after reaching the value, counting up and comparison operations are no longer necessary, and processing time can be shortened.

〔Example〕

FIG. 2 is a diagram showing the configuration of a received data memory according to an embodiment of the present invention. In the figure, the memory for received data corresponding to each line is provided with a counter section 21 for counting the number of consecutive identical data and a last look (LL) data section 22 for storing the last received data.

FIG. 3 is a schematic flow chart of an embodiment of the present invention.

As shown in the figure, according to the embodiment of the present invention, it is determined in one scan whether or not the same data is received, and a count-up is performed for noise protection. That is, step 31
If the received data does not match the contents of at least one of the counter section 21 and LL data section 22 in the received data memory, the contents of the counter section 21 and LL data section 22 in the received data memory are updated in step 32. . Further, when the received data matches both the contents of the counter section 21 and the contents of the LL data section 22 in the received data memory in step 31, reception processing is performed in step 33.

A more detailed embodiment of the present invention will be described with reference to FIGS. 4 and 5.

The device applied according to the embodiment of the present invention is firmware that performs subscriber data reception processing in the common section of the subscriber system shown in FIG. As shown in Figure 4, the data that is multiplexed and sent on one line is BO-815's 16
Of these, only the 16th bit, B15, is used for the last look.
The other bits are "0" fixed bits. Therefore, according to the embodiment of the present invention, the 16th bit B15 of the received data memory is used as LLL data 41, and the 2 bits BO8 and BO9, which are ineffective bits, are stored in the counter section 42. used as According to the embodiment of the present invention, the number of stages for protecting received data from noise is two stages, and the counter section is 2 bits.

FIG. 5 is a flowchart illustrating a scan counter method according to an embodiment of the present invention. In the figure, received data and counter values are determined in - scans. At scan 51, receive data and LLL in memory
In addition to comparing the data 41, "0" in BO8 and BO9 of the received data is compared with the contents of the counter section 42. If both the LLL data 41 and the counter section 42 match, the CPU 11 waits for scanning with the next received data without performing any processing. LLL data 41 and counter section 42
If either one of them does not match, the process proceeds to step 52 and the contents of the received data and the LLL data 41 are compared. If the result is a mismatch, it is assumed that data different from the previous data has been received, and the contents of the LLL data 41 are updated with new data in step 53, and the count value is set to 1. If the received data matches the contents of the LLL data 41 in step 52, it is determined in step 54 whether the counter value is equal to a predetermined value X, and if not, the contents of the counter 42 are counted up in step 55, and the next Wait for scan. If they are equal in step 54, reception processing is performed in step 55, and then the contents of the counter section 42 are set to 0 in step 56.
Clear to 0.

After the reception processing is performed, the count value is cleared, so the determination in step 51 is YES, and the reception data can be received one after another without any processing.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the processing sequence that conventionally required at least two string instructions to be performed for one memory check can be efficiently and efficiently performed with one string instruction. This can be done easily, and the processing time for data reception using the scan counter method can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a principle block diagram of the present invention. FIG. 2 is a diagram showing the structure of a memory for received data according to an embodiment of the present invention. FIG. 3 is a schematic flowchart of an embodiment of the present invention. FIG. 4 is a diagram of the present invention. FIG. 5 is a flowchart illustrating the scan counter method according to the embodiment of the present invention; FIG. 6 is a block diagram illustrating the industrial application field of the present invention; FIG. 7 is a diagram showing a conventional LL data section upper memory configuration, FIG. 8 is a diagram showing a conventional counter section memory configuration, and FIG. 9 is a flowchart explaining an overview of conventional processing. In the figure, 1 is a data storage section, 2 is a counter section, 3 is a memory for received data, and 4 is a reception processing means.

Claims (1)

[Claims] 1. In a system that periodically receives data from a plurality of lines, a data storage unit (1) that stores the last received data corresponding to each of the lines, and a number of times the same data is received. a reception data memory (3) having a counter section (2) for storing the same data, and a reception process that performs reception processing and clears the contents of the counter section when the number of receptions of the same data in the counter section equals a predetermined value. means (4), wherein the last received data matches the next received data by one scan of the received data memory, and the number of receptions of the counter unit does not reach the predetermined value. The contents of the counter section are counted up only when the last received data and the next received data match, and only when the number of receptions of the counter section is equal to the predetermined value. A scan counter method for a memory for received data, characterized in that reception processing is performed.