KR19990055717A - Data flow control device and method of IC circuit pack - Google Patents

Abstract

The present invention relates to an electronic switch, in particular, the CPU 200 for outputting a chip select signal and a control signal to prevent the loss of data; Receives the control signal of the CPU 200 to the data input from the external device 100 and outputs it to the local memory unit 400, the external device 100 receives the data output from the local memory unit 400 Serial communication control unit 300 for outputting; Receives the data output from the serial communication control unit 300 and outputs it by the control signal of the CPU 200, receives the data output from the shared memory unit 500 and outputs it to the serial communication control unit 300 Local memory unit 400 to make; Shared memory unit for receiving and outputting the data output from the local memory unit 400, storing the data output from the application 600 and receiving the chip selection signal of the CPU 200 to output the data ( 500); And an application 600 for receiving the data output from the shared memory unit 500 and comparing the set data with the set data to output the result data. The present invention does not lose data to an external device. Accurate data is output and additional area can be added later because the buffer area allocated to each port is reduced so that it can be used for other purposes at the user's convenience. It can be effective.

Description

Data flow control device and method of IC circuit pack

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an all-electronic exchange, and in particular, by controlling the flow between data received from the shared memory to the local memory unit and data transmitted from the local memory unit to the first-in, first-out of the serial communication controller, thereby preventing data loss. The present invention relates to a data flow control apparatus and method for an I / O interface circuit pack.

Currently, the field where the input / output interface circuit pack (INPUT / OUTPUT PORT INTERFACE BOARD ASSEMBLY: IOPA) in the FULL-ELECTRONIC EXCHANGE input / output control block (HUMAN MACHINE PROCESSOR HARDWARE BLOCK: HMPH BLOCK) is used It can be used for the input / output interface of switchboards, switchboards for CODE DIVISION MULTIPLE ACCESS (CDMA) and switchboards for PERSONAL COMMUNICATION SYSTEM (PCS).

The output method of the input / output interface circuit pack, which stores the data of the shared memory in the local memory unit allocated to each port sufficiently and transmits it to the first-in, first-out of the serial communication controller by the interrupt method, is there any data to be transmitted from the shared memory? If there is no data transmission determination step (S1) to determine, and if there is no data to be transmitted from the shared memory unit in the data transfer determination step (S1), the data is returned to the beginning, and if there is a data transfer step of transferring data from the shared memory unit to the local memory unit ( S2), if data has been transmitted to the local memory unit in the data transfer step S2, and a transmission interruption step S3 that takes a transmission interrupt, and if a transmission interruption has occurred by transferring data in the transmission interrupt step S3, Data in the local memory is preempted by the serial communication controller by interrupt processing. Consists of a first-in-first-out group transfer step (S4) which is sent to.

That is, in the operation process of the conventional input / output interface circuit pack output method, it is determined whether there is data to be transmitted from the shared memory unit (S1), and if there is no data to be transmitted, it returns to the beginning, and if there is no data from the shared memory unit to the local memory unit, (S2), when data is transmitted to the local memory unit, a transmission interrupt is applied (S3), and data of the local memory unit is transferred to the first-in, first-out of the serial communication controller by the transmission interrupt process (S4).

As described above, in the conventional input / output interface circuit pack output method, a buffer of sufficient space for each port is provided in the local memory unit of the initial electronic exchanger input / output interface board, and data received from the shared memory is provided. Was stored in the local memory and transferred to the first-in, first-out of the serial communication controller (SCC) by interrupt method.

However, since the data input from the shared memory is stored in the local memory before the serial communication controller processes the data in the local memory, no matter how large the buffer area for each channel is, the message is lost due to the overflow of the buffer area. Could not be avoided.

This is caused by the processing speed that the central processing unit of the input / output interface circuit pack transfers from the shared memory unit to the local memory unit is much faster than the data processing speed of the serial communication controller through the interrupt method.

For reference, the processing speed of the serial communication controller is set to 9600bps. When the user uses a device connected to the input / output port of the input / output interface circuit pack as well as the local memory, the input data is Due to the delay of the ECHO, the user does not seem to be able to process in real time.

The reason for this is that the data input by the user is accumulated in the shared memory via the input / output interface circuit pack, and the data is transferred to the APPLICATION stage by the CROS. The data is stored in the shared memory through the cross again, and the input / output interface circuit pack transmits the data of the shared memory back to the input / output port of the input / output interface circuit pack through packet processing.

At this time, in the I / O interface circuit pack, the echo data transmitted to the I / O port is also processed in the same way as the general transmitted data. Therefore, the common data is transferred from the shared memory section to the local memory section. Even with higher priorities, the echoed data must accumulate in the local memory of the I / O interface circuit pack and be delayed until its turn.

For this reason, a user of a device connected to an input / output port may not only feel uncomfortable because the echo of the data input by the user reacts late when a lot of data is accumulated in the local memory but also has a serious problem on the user. there was.

The present invention is to solve the above problems, in particular, the shared memory unit for the flow control between the data input from the shared memory unit to the local memory unit and the data output from the local memory unit to the first-in first-out unit of the serial communication control unit When data is input from the local memory unit to the serial communication controller, the serial communication controller generates a transmission interrupt so that the input data is output to the external device and receives data from the shared memory unit again after the processing of the input data is completed. Accordingly, the present invention provides an apparatus and method for controlling data flow of an I / O interface circuit pack that can prevent data loss due to overflow of a local memory buffer and enable real-time data processing of a user. .

In order to achieve the above object, a data flow control apparatus of an electronic switching device of the present invention includes: a CPU for outputting a chip selection signal and a control signal; A serial communication control unit which receives data input from an external device and outputs the control signal of the CPU to a local memory unit, and receives data output from the local memory unit and outputs the data to an external device; A local memory unit for receiving the data output from the serial communication control unit and outputting the data by the control signal of the CPU, and receiving the data output from the shared memory unit and outputting the data to the serial communication control unit; A shared memory unit for receiving and outputting data output from the local memory unit, storing data output from an application, and receiving a chip selection signal of the CPU to output data; And an application for receiving the data output from the shared memory unit and comparing the set data to output the result data.

On the other hand, the data flow control method of the I / O interface circuit pack of the present invention includes a data transmission determination step (S10) for determining whether there is data to be transmitted from the shared memory unit; If there is no data to be transmitted from the shared memory in the data transfer determination step (S10), and if there is no data to be transferred to the local memory unit, if there is a data transfer and counter 1 increase step (S20) ; A transmission interrupt step (S30) of transmitting data to the local memory unit in the data transmission and counter 1 increment step and sending a interrupt when the counter is increased by one; If data is transmitted in the transmission interrupt step (S30) and a transmission interrupt has occurred, the data first-in-first-out transmission and counter 1 transfers the data of the local memory unit to the first-in, first-out-first-out of the serial communication control unit by interrupt processing, and decreases the counter by one. A reduction step (S40); In the first-in-first-out transmission and counter one decrement step (S40), if the data is transmitted to the first-in first-out, and the counter is decremented by one, it is determined whether the counter is zero or the data first-in-first-out transmission and counter one decrement step (S40). It is characterized in that it comprises a counter 0 determination step (S50) to return to, and ends if correct.

1 is a flow chart of data flow control of a conventional all-in / out interface circuit pack;

FIG. 2 is a block diagram showing a data flow control apparatus of an all-in / out interface circuit pack according to one embodiment of the present invention; FIG.

3 is a flowchart illustrating a data flow control method of an IC circuit pack according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: external device 200: CPU

300: serial communication control unit 301: receiving first-in first-out

302: first-in first-out section 400: local memory section

500: shared memory 600: application

Hereinafter, the above-described contents will be described in detail through an embodiment according to the present invention.

As shown in FIG. 1, first, the CPU 200 outputs a chip select signal and a control signal, and the serial communication controller 300 receives data input from the external device 100. Receives the control signal of the CPU 200 and outputs it to the local memory unit 400, receives the data output from the local memory unit 400 and outputs it to the external device 100, local memory unit 400 ) Receives the data output from the serial communication control unit 300 and outputs the data by the control signal of the CPU 200, and receives the data output from the shared memory unit 500 and receives the data output from the serial communication control unit 300. Will output

In addition, the shared memory unit 500 receives and outputs the data output from the local memory unit 400, stores the data output from the application 600, and receives the chip selection signal of the CPU 200. The data is output, and the application 600 receives the data output from the shared memory unit 500 and compares the set data with the set data to output the result data.

Hereinafter, an operation process of a data flow control apparatus of an all-in / out interface circuit pack configured as described above will be described.

When a user outputs data through an external device (for example, a computer, a printer, a display device, etc.) 100, the CL-CD 1865 supports 8 channels per chip on the data output from the external device 100. Receives and outputs from the first-in, first-out unit 301 of the serial communication control unit 300 that can be used to connect a variety of input / output devices to all 16 channels using two, and receives the serial communication control unit 300 The data output from the first-in, first-out unit 301 is input from the local memory unit 400 composed of 512 kilobytes (Kbytes) of static RAM and outputs the data.

In addition, MC68360 (Quad Integrated Communications) receives data output from the local memory unit 400 from a shared memory unit 500 including local access and external access with a size of 128 kilobytes (Kbytes). When the controller outputs data by the control signal of the CPU 200 configured as the CPU 32 + 20 MHz, which is the core of the controller: QUICC, the data output from the shared memory unit 500 is input from the application APPLICATIO-N 600. The received data is compared with the preset data and the result data is output.

Then, the result data output from the application 600 is received and stored in the shared memory unit 500, and the result data selected by the chip select signal of the CPU 200 is outputted. After receiving the data output from the 500 from the local memory unit 400, the data is stored in an area where the area is allocated, and the result data is output by the control signal of the CPU 200.

In addition, when the result data output from the local memory unit 400 is inputted by the first-in first-out unit 302 of the serial communication controller 300 and outputs the result data, the first-in, first-out of the serial communication controller 300 is output. The result data output from the unit 302 is received from the external device 100 and displayed so that the user can know the result data.

On the other hand, the data flow control method of the I / O interface circuit pack according to the present invention determines whether there is data to be transmitted from the shared memory unit 500 (S10), the shared memory unit (S10) in the data transmission determination step (S10). If there is no data to be transmitted from 500, the process returns to the beginning, and if it is, the counter is increased by one while transferring data from the shared memory unit 500 to the local memory unit 400.

In addition, when the data is transmitted to the local memory unit 400 in the data transfer and counter 1 increment step (S20), and the counter is increased by 1, the transmission first-in, first-out unit 302 of the serial communication control unit 300 interrupts the transmission. (S30), if data is transmitted in the transmission interrupt step (S30) and the transmission interrupt is transmitted by the first-in, first-out unit 302 of the serial communication control unit 300, the local memory unit 400 is interrupted by an interrupt process. The data is transmitted to the first-in, first-out of the serial communication control unit 300, and the counter is reduced by one (S40).

Then, if the data is transmitted to the first-in, first-out unit 302 in the first-in first-out unit transmission and counter 1 reduction step (S40), and the counter is decremented by 1, it is determined whether the counter is 0 or the first-in-first-out unit transmission and counter The process returns to one reduction step S40 and ends if it is correct (S50).

As described above, the apparatus and method of the present invention, the input / output interface circuit pack data flow control device of the electronic switch, does not lose data to an external device so that accurate data is output and the buffer area allocated to each port is reduced. As a result, additional functions can be added later, and it can be used for other purposes at the convenience of the user, and by immediately checking the echo of the data input by the user, the input delay time due to the overflow of the conventional local memory part can be shortened. It has an effect.

Claims (2)

A CPU for outputting a chip select signal and a control signal; A serial communication control unit which receives data input from an external device and outputs the control signal of the CPU to a local memory unit, and receives data output from the local memory unit and outputs the data to an external device; A local memory unit for receiving the data output from the serial communication control unit and outputting the data by the control signal of the CPU, and receiving the data output from the shared memory unit and outputting the data to the serial communication control unit; A shared memory unit for receiving and outputting data output from the local memory unit, storing data output from an application, and receiving a chip selection signal of the CPU to output data; And an application for receiving the data output from the shared memory unit and comparing the set data to output the result data. A data transmission determination step (S10) of determining whether there is data to be transmitted from the shared memory unit; If there is no data to be transmitted from the shared memory in the data transfer determination step (S10), and if there is no data to be transferred to the local memory unit, if there is a data transfer and counter 1 increase step (S20) ; A transmission interrupt step (S30) of transmitting data to the local memory unit in the data transmission and counter 1 increment step and sending a interrupt when the counter is increased by one; If data is transmitted in the transmission interrupt step (S30) and a transmission interrupt has occurred, the data first-in-first-out transmission and counter 1 transfers the data of the local memory unit to the first-in, first-out-first-out of the serial communication control unit by interrupt processing, and decreases the counter by one. A reduction step (S40); In the first-in-first-out transmission and counter one decrement step (S40), if the data is transmitted to the first-in first-out, and the counter is decremented by one, it is determined whether the counter is zero or the data first-in-first-out transmission and counter one decrement step (S40). And a counter 0 determination step (S50) of returning to &lt; RTI ID = 0.0 &gt; and &lt; / RTI &gt; correcting the data flow control method.