KR100318846B1 - Data flow control device and method of all electronic exchange input / output interface 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; After receiving data from the external device 100, the serial communication control unit 300 outputs data by the control signal of the CPU 200, and at the same time receives the data and outputs the data to the external device 100. ); After receiving the data from the serial communication control unit 300 and outputs the data by the control signal of the CPU 200, while receiving the data and outputs the data to the serial communication control unit 300 at the same time Unit 400; After receiving the data from the local memory unit 400 and outputting the data, while receiving and storing the data after receiving the chip selection signal from the CPU 200, corresponding data corresponding to the local memory unit ( A shared memory unit 500 for outputting to 400; And an application 600 that receives data from the memory unit 500 and compares the data with the set data and outputs the result data corresponding thereto. Since the correct data is output without loss and the buffer area allocated to each port is reduced, additional functions can be added later so that it can be used for other purposes by the user's convenience. There is an effect that can be confirmed immediately.

Description

Data flow control device and method of IC circuit pack

The present invention relates to an electronic switch, in particular, to prevent the loss of data through the flow control between the data received from the shared memory to the local memory unit and the data transmitted from the local memory unit to the first-in, first-out of the serial communication control unit 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).

In the conventional data flow control method of the all-in / out interface circuit pack, as shown in FIG. 1, a data transmission determination step (S1) of determining whether there is data to be transmitted from a shared memory, and the data transmission determination step If there is no data to be transmitted from the shared memory section at S1, the data is returned to the beginning, and if there is a data transfer step (S2) of transferring data from the shared memory section to the local memory section, and the data is transferred from the data transfer step (S2) to the local memory section. Is transmitted, the data is transmitted from the transmission interrupt step S3 to which the transmission interrupt is applied, and if the data is interrupted by the data transmission in the transmission interrupt step S3, the data of the local memory unit is interrupted to the first-in first-out-employee of the serial communication controller by interrupt processing. It consists of a first-in first-out transmission step (S4) to be transmitted.

That is, the operation process of the data flow control method of the conventional I / O interface circuit pack determines whether there is data to be transmitted in the shared memory unit (S1), and returns to the beginning when there is no data to be transmitted, When data is transferred from the memory unit to the local memory unit (S2), when data is transferred to the local memory unit, a transmission interrupt is applied (S3), and the data of the local memory unit is transferred to the first-in first-out of the serial communication controller by the transmission interrupt processing ( 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.

In addition, the processing speed of the serial communication controller is currently set to 9600bps, and 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 echoed. Due to the time delay (ECHO), it seems that the user is not processing in real time.

This is because the data entered 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 to the local memory unit, the serial communication controller generates a transmission interrupt to output the input data to an external device, and receives data from the shared memory unit again after the processing of the input data is finished. 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, the data flow control apparatus of an electronic switch in / out interface circuit pack of the present invention receives data from a CPU external device that outputs a chip select signal and a control signal, and then inputs the data to the control signal of the CPU. A serial communication control unit which outputs data by means of the data and simultaneously receives the data and outputs the data to the external device; A local memory unit for receiving data from the serial communication controller and outputting the data by the control signal of the CPU, and receiving the data and outputting the data to the serial communication controller; A shared memory unit which outputs data after receiving data from the local memory unit, and outputs corresponding data to the local memory unit when receiving a chip selection signal from the CPU after receiving and storing data; And an application configured to receive data from the shared memory unit, compare the data with the set data, and output the corresponding result data.

On the other hand, the data flow control method of the I / O interface circuit pack according to 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 flowchart illustrating a data flow control method of a conventional all-in-exchange input / output interface circuit pack.

2 is a functional block diagram showing a configuration of a data flow control apparatus of an IC circuit input / output interface pack according to an 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 the 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, an apparatus and a method for controlling data flow of an I / O interface circuit pack according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a functional block diagram of a data flow control apparatus of an all-electronic exchange I / O interface circuit pack according to an embodiment of the present invention, and the data of the all-electronic exchange I / O interface circuit pack according to one embodiment of the present invention. The flow control apparatus includes an external device 100, a central processing unit (CPU) 200, a serial communication control unit 300 including a reception first-in first-out 301 and a transmission first-in first-out 302. , A local memory unit 400, a shared memory unit 500, and an application 600.

The external device 100 receives and outputs data from the serial communication controller 300 and outputs data to the serial communication controller 300.

In addition, the CPU 200 outputs a control signal to the serial communication controller 300 and the local memory 400, and outputs a chip select signal to the shared memory 500. .

The serial communication control unit 300 receives data from the external device 100 and outputs data to the local memory unit 400 according to a control signal of the CPU 200. It receives the data from the 400 and at the same time outputs the data to the external device (100).

In addition, the local memory unit 400 receives data from the serial communication control unit 300, and then outputs data to the shared memory unit 500 by the control signal of the CPU 200, while sharing the data. At the same time as receiving data from the memory unit 500 and outputs the data to the serial communication control unit 300.

The shared memory unit 500 receives data from the local memory unit 400, outputs the data to the application 600, receives data from the application 600, stores the data, and then stores the data. When the chip select signal is received from the CPU 200, the corresponding data is output to the local memory unit 400.

In addition, when the application 600 receives data from the shared memory unit 500, the application 600 compares the data with the set data and outputs the corresponding 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 (eg, a computer, a printer, a display device, etc.) 100, the CL-CD supports 8 channels per chip for the data output from the external device 100. By using two 1865 inputs and outputs from the first-in, first-out 301 of the serial communication control unit 300 that can be used to connect a variety of input / output devices to all 16 channels, the serial communication control unit 300 of The data output from the first-in, first-out unit 301 is received from the local memory unit 400 that is 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, the application 600 receives the data output from the shared memory 500 and inputs the data. Outputs the result data by comparing with the preset data.

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 selection 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 an embodiment of the present invention, as shown in Figure 3, by determining whether there is data to be transmitted from the shared memory unit 500 (S10 If there is no data to be transmitted from the shared memory unit 500 in the data transmission determination step (S10), the data returns to the beginning, and if there is data to be transmitted, the data is transferred from the shared memory unit 500 to the local memory unit 400. The counter increases by 1 while transmitting. (S20)

Then, in the data transmission and counter 1 increment step (S20), if the data is transmitted to the local memory unit 400 and the counter is increased by 1, the first-in, first-out unit 302 of the serial communication controller 300 transmits the data. If a transmission interrupt is issued (S30) and data is transmitted in the transmission interrupt step (S30) and a transmission interrupt is made by the transmission first-in, first-out unit 302 of the serial communication control unit 300, the local memory unit 400 is interrupted by an interrupt process. ) Is transmitted to the first-in first-out part 302 of the serial communication control unit 300, and the counter is decremented by one (S40).

Subsequently, in the first-in-first-out transmission and counter 1 reduction step (S40), when data is transmitted to the first-in, first-out unit 302, and the counter is decremented by one, it is determined whether the counter is zero. The process returns to the sub-transmission and counter 1 decrement step S40, and ends when the counter is zero (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 outputs data by a control signal of the CPU after receiving data from an external device, and simultaneously receives the data and outputs the data to the external device; A local memory unit for receiving data from the serial communication controller and outputting the data by the control signal of the CPU, and receiving the data and outputting the data to the serial communication controller; A shared memory unit which outputs data after receiving data from the local memory unit, and outputs corresponding data to the local memory unit when receiving a chip selection signal from the CPU after receiving and storing data; And And an application configured to receive data from the shared memory unit, compare the data with the data set therein, and output corresponding 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 increment 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.

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