KR100594183B1 - Remote Key Data Interface Method in Car Navigation System - Google Patents

Abstract

The present invention relates to a remote control key data interface device and a method thereof in a car navigation system, and more particularly, converts serial key data transmitted from a remote control into a parallel signal and transmits the same to a microcomputer while scrolling the completion time of the key data when scrolling. The present invention relates to a remote control key data interface device in a car navigation system and a method for allowing a microcomputer to accurately recognize the present invention. According to the remote control key data interface device and a method in a car navigation system according to the present invention, By converting serial key data into parallel signals and outputting them to the microcomputer, the microcomputer allows the microcomputer to accurately recognize the completion time of the key data when scrolling. There are excellent effects that can give you, as well as a way to avoid an excessive load haejueo not to perform the completion of the counting operation takes data, improving the performance of the resulting microcomputer.

Description

Remote control key data interface method in car navigation system {METHOD FOR INTERFACING REMOTE CONTROL KEY DATA IN CAR NAVIGATION SYSTEM}

1 is a functional block diagram showing the configuration of a remote control key data interface device in a car navigation system according to an embodiment of the present invention;

2 is an operation flowchart illustrating a remote control key data interface method in a car navigation system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: data recognition unit 101: first dual counter

102 D flip-flop 103 first counter

200: data detection and latching unit 201: second counter

202: data latch unit 300: key processing completion unit

301: second dual counter 302: second dual counter

303: third counter 400: output request unit

401: first falling edge detector 402: second falling edge detector

500 microprocessor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control key data interface in a car navigation system, and more particularly, to serial serial key data transmitted from a remote control. The present invention relates to a remote control key data interface method in a car navigation system that converts a signal into a microcomputer and transmits the same to the microcomputer while allowing the microcomputer to accurately recognize the completion time of the key data upon scrolling.

In the conventional key navigation method of the car navigation system, when the serial control key data is transmitted from the remote control to the microcomputer, the microcomputer receives the serial control key data directly and converts the serial control key data into a parallel signal and processes the data. When the scroll data is transmitted to the microcomputer, the microcomputer performs a separate counting operation to confirm the completion point of the scroll data, thereby completing the scroll operation.

However, as a key data interface method in a conventional car navigation system, the microcomputer needs to perform a serial data parallel conversion operation and a scroll data completion point counting operation in addition to its own processing operation. There was a problem.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a remote control key data interface method in a car navigation system for improving the performance of the microcomputer by preventing the microcomputer from being subjected to excessive load. To provide.

In order to achieve the above object, the remote control key data interface device in the car navigation system of the present invention comprises: a data recognizing unit for determining whether serial input data of a predetermined bit is key data and outputting a corresponding driving signal; A data detection and latching unit which is driven by the drive signal output from the data recognition unit, counts the serial control key input data in a binary method, stores the data in a parallel manner, and passes the last bit of the control key data; A key processing completion unit which is driven by the driving signal output from the data recognition unit and counts scroll input data every predetermined time and then outputs a counting clock corresponding thereto; An output that receives the last bit of the intermittent key data that has passed through the data detection and latch unit, generates an output request interrupt at the polling point of the last bit, and receives a counting clock from the key processing completion unit and outputs a scroll interrupt A request unit; Access to the intermittent key data stored in the data detection and latching unit in a parallel manner upon interruption from the output requesting unit, perform a scrolling operation upon scroll interrupt from the output requesting unit, and complete a scrolling operation upon interrupting scrolling interruption. It is characterized by consisting of a microprocessor.

In addition, the remote control key data interface method in the car navigation system of the present invention,

A first step of determining whether or not the predetermined bit data inputted in the serial manner is key data; If the data of the predetermined bit input in the first step is noise instead of the key data, the data is terminated if the data of the predetermined bit input in the first step is the key data. And a second step of outputting to a key processing completion unit; A third step of determining whether the data detection and latching unit and the key processing completion unit are driven by receiving a driving signal and determining whether a predetermined bit of key input data is intermittent key data or scroll data; In the third step, if the key input data of the predetermined bit is intermittent key data, the key processing completion unit is cleared, the data detection and latch unit counts the intermittent key data in binary, and stores the intermittent key data in parallel. A fourth step of passing the last bit of to the output requesting portion; A fifth step of the output requesting unit receiving the last bit of the intermittent key data from the data detecting and latching unit to detect a polling edge and generating an output request interrupt to the microprocessor at the polling edge; A sixth step of the microprocessor receiving an output request interrupt from the output requesting unit and accessing all of the control key data stored in parallel in the data detection and latching unit; And a seventh step in which the microprocessor outputs a clear signal to the data recognition unit and the data detection and latching unit to clear the data recognition unit and the data detecting and latching unit.

Hereinafter, a remote control key data interface device and a method thereof in a car navigation system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of a remote control key data interface device in a car navigation system according to an embodiment of the present invention, the remote control key data interface device in a car navigation system according to an embodiment of the present invention is a data recognition unit ( 100), a data detection and latch unit 200, a key processing completion unit 300, an output request unit 400, and a microprocessor 500.

The data recognizing unit 100 determines whether the serial input data of a predetermined bit is key data transmitted from the remote controller 1, and if the data is key data, the data detection and latching unit 200. And outputs to the key processing completion unit 300 and includes a first dual counter 101, a D flip-flop 102, and a first counter 103. .

In this case, the first dual counter 101 mounted in the data recognition unit 100 receives a frequency of 1 MHz and divides the frequency 200, and supplies a 5 kHz clock to the D flip-flop 102. For example, it can be implemented using a general purpose chip "74390 IC chip".

Meanwhile, the D flip-flop 102 mounted in the data recognition unit 100 receives a 5 kHz clock output from the first dual count 101 and generates a counting clock to generate the counting clock. It can be implemented using the "7474 IC chip" which is a general purpose chip.

In addition, the first counter 103 mounted in the data recognizing unit 100 receives a counting clock output from the D flip-flop 102 and then starts a start bit among predetermined bits of data input in a serial manner. Bit is counted, and if the start bit is 9 ms or more, it is determined as key data transmitted from the remote controller 1, and the driving signal is transmitted to the data detection and latching unit 200 and the key processing completion unit 300. It plays a role of outputting, for example, it can be implemented using a general purpose chip "74161 IC chip".

On the other hand, the data detection and latching unit 200 is driven by a drive signal output from the first counter 103 mounted in the data recognition unit 100, serial control key input data transmitted from the remote control 1 Is counted in binary and stored in parallel, and at the same time, the last bit of the control key data passes to the output requesting unit 400, and the second counter 201 and four data latching units 202 are provided. It is composed.

In this case, the second counter 201 mounted in the data detection and latch unit 200 is driven by a drive signal output from the first counter 103 mounted in the data recognition unit 100, and then the remote controller is mounted. It receives the 33-bit serial control key data transmitted in (1) and counts it in binary, and then outputs the data to the four data latch units 202. For example, a "74163 IC chip", which is a general-purpose chip, is used. Can be implemented.

In addition, the four data latching units 202 mounted in the data detecting and latching unit 200 receive 33-bit intermittent key data counted in binary by the second counter 201, respectively. The bits are stored one by one and the last one bit passes through the output request unit 400. For example, the first bit may be implemented using a general purpose chip, an "74595 IC chip."

Meanwhile, the key processing completion unit 300 is driven by a drive signal output from the first counter 103 mounted in the data recognition unit 100, and then inputs scroll data transmitted from the remote controller 1. It receives the counting every predetermined time, and then outputs the corresponding counting clock to the output request unit 400, and consists of the second and third dual counters 301 and 302 and the third counter 303.

In this case, the second and third dual counters 301 and 302 mounted in the key processing completion unit 300 receive a 6 MHz frequency, divide the frequency into 1000, and then set a 6 kHz clock that is a data detection counting clock to the third counter 303. ), And can be implemented by using, for example, a general purpose chip, "74390 IC chip."

Further, after the third counter 303 mounted in the key processing completion unit 300 is driven by the drive signal output from the first counter 103 mounted in the data recognition unit 100, the second counter 303 is driven. And counting scroll data output from the remote controller 1 every 12 ms using a 6 ms clock, which is a data detection counting clock output from the 3 dual counters 301 and 302, and then counting the corresponding counting clock. It serves to supply to the unit 400, for example, it can be implemented using a general purpose chip "74163 IC chip".

On the other hand, when the output request unit 400 receives the last bit of the intermittent key data that has passed through the data detection and latch unit 200, the output request unit 400 outputs an output request interrupt at the polling edge of the last bit. 500, and outputs a scroll interrupt to the microprocessor 500 when a counting clock is supplied from the key processing completion unit 300, and scrolls when a counting clock is stopped from the key processing completion unit 300. The interrupt output operation is interrupted and includes a first falling edge detector 401 and a second falling edge detector 402.

At this time, the first falling edge detector 401 mounted in the output request unit 400 receives the last bit of the intermittent key data from the four data latch units 202 mounted in the data detection and latch unit 200. It receives the input and generates an output request interrupt to the microprocessor 500 at the polling point of the last bit.

In addition, the second falling edge detector 402 mounted in the output request unit 400 generates a scroll interrupt when the counting clock is supplied from the third counter 303 mounted in the key processing completion unit 300. While outputting to the processor 500, when the counting clock is stopped from the third counter 303 mounted in the key processing completion unit 300, the scroll interrupt output operation is stopped.

Meanwhile, when the microprocessor 500 receives the output request interrupt output from the first falling edge detector 401 mounted in the output request unit 400, the microprocessor 500 is stored in the four data latch units 202 in parallel. Access the enforcement key data.

In addition, the microprocessor 500 performs a scroll operation upon receiving a scroll interrupt from the output request unit 400, and recognizes the scroll completion time when supply of the scroll interrupt from the output request unit 400 is stopped. To complete the scrolling operation.

Next, a remote control key data interface method in a car navigation system according to an embodiment of the present invention using a remote control key data interface device in a car navigation system having the above configuration will be described.

2 is an operation flowchart showing a remote control key data interface method in a car navigation system according to an embodiment of the present invention, where S represents a step.

First, the first dual counter 101 mounted in the data recognizing unit 100 divides the 1 MHz frequency 200 to generate a 5 kHz clock, and then supplies the 5 kHz clock to the D flip-flop 102. do. Then, the D flip-flop 102 receives the 5 kHz clock output from the first dual count 101, generates a counting clock, and supplies it to the first counter 103. Subsequently, the first counter 103 receives a counting clock output from the D flip-flop 102 and counts a start bit among predetermined bit data input in a serial manner, and determines whether the start bit is 9 ms or more. It is determined whether or not the predetermined bit data inputted in the serial method is key data (S1).

At this time, if the predetermined bit data input in the first step S1 is serial noise instead of key data (NO), the interface processing operation is terminated while the predetermined bit data input in the serial method is key data. Back surface (YES) The first counter 103 mounted in the data recognition unit 100 transmits a drive signal to the second counter 201 and the key processing completion unit 300 mounted in the data detection and latching unit 200. It outputs to the 3rd counter 303 mounted in the inside (S2).

The data detection and latching unit 200 and the key processing completion unit 300 are driven by receiving a driving signal output from the first counter 103 mounted in the data recognition unit 100, and then driving the remote controller. It is determined whether the key input data of the predetermined bit transmitted in step (1) is intermittent key data or scroll data (S3).

At this time, if the key input data of the predetermined bit transmitted from the remote controller 1 in the third step S3 is intermittent key data, the third counter 303 mounted in the key processing completion unit 300 is cleared. On the other hand, the second counter 201 mounted in the data detection and latching unit 200 outputs the four bits of data latching unit 202 after counting 33-bit intermittent key data in binary. Then, the four data latching unit 202 receives the 33-bit control key data output from the second counter 201 and stores them four times in parallel in 8 times, and then stores the last bit of the control key data. Passes through the first falling edge detector 401 mounted in the output requesting unit 400 (S4).

Meanwhile, the first polling edge detector 401 mounted in the output requesting unit 400 receives the last bit of the intermittent key data from the data detecting and latching unit 200 to detect the polling edge point, and then polls the polling edge. An output request interrupt is generated to the microprocessor 500 at the edge point (S5).

Then, the microprocessor 500 receives the output request interrupt output from the first falling edge detector 401 mounted in the output request unit 400, and executes the intermittent key parallel stored in the four data latch units 202. All data is accessed (S6).

Thereafter, the microprocessor 500 outputs a clear signal to the data recognition unit 100 and the data detection and latching unit 200, and thus the data recognition unit 100 and the data detection and latching unit 200. Clear (S7).

On the other hand, if the key input data of the predetermined bit transmitted from the remote controller 1 in the third step S3 is scroll data, the second counter 201 mounted in the data detection and latch unit 200 is cleared. Meanwhile, the third counter 303 mounted in the key processing completion unit 300 receives the scroll data transmitted from the remote controller 1 and counts it every predetermined time, and then counts a counting clock into the output request unit 400. The second falling edge detector 402 is mounted (S8).

Then, the second falling edge detector 402 mounted in the output request unit 400 receives a counting clock output from the key processing completion unit 300 and outputs a scroll interrupt to the microprocessor 500 ( S9).

On the other hand, the microprocessor 500 determines whether a scroll interrupt is supplied from the second falling edge detector 402 mounted in the output requesting unit 400 (S10).

In this case, when the scroll interrupt is supplied from the second falling edge detector 402 mounted in the output request unit 400 in the tenth step S10 (YES), the microprocessor 500 performs the scroll operation. After that, the process proceeds to the tenth step S10 again (S11).

However, if the scroll interrupt is not supplied from the second falling edge detector 402 mounted in the output request unit 400 in the tenth step S10 (NO), the microprocessor 500 returns to the scroll completion point. Recognize and complete the scroll operation (S12).

Thereafter, the microprocessor 500 outputs a clear signal to the key processing completion unit 300 to clear the key processing completion unit 300 (S13).

As described above, according to the remote control key data interface device and the method in the car navigation system according to the present invention, the serial key data transmitted from the remote control is converted into a parallel signal and then output to the microcomputer and the completion of the key data upon scrolling. By allowing the microcomputer to recognize the point of view correctly, it prevents the microcomputer from performing the serial key input data parallel conversion operation and counting the completion point of the key data at the time of scrolling so as not to overload the microcomputer. There is an excellent effect that can improve the performance of.

Claims (8)

delete delete delete delete delete delete A first step of determining whether or not the predetermined bit data inputted in the serial manner is key data; If the data of the predetermined bit input in the first step is noise instead of the key data, the data is terminated if the data of the predetermined bit input in the first step is the key data. And a second step of outputting to a key processing completion unit; A third step of determining whether the data detection and latching unit and the key processing completion unit are driven by receiving a driving signal and determining whether a predetermined bit of key input data is intermittent key data or scroll data; In the third step, if the key input data of the predetermined bit is intermittent key data, the key processing completion unit is cleared, the data detection and latch unit counts the intermittent key data in binary, and stores the intermittent key data in parallel. A fourth step of passing the last bit of to the output requesting portion; A fifth step of the output requesting unit receiving the last bit of the intermittent key data from the data detecting and latching unit to detect a polling edge and generating an output request interrupt signal to the microprocessor at the polling edge; A sixth step of the microprocessor receiving an output request interrupt signal from the output requesting unit and accessing all of the control key data stored in parallel in the data detection and latching unit; A seventh step of the microprocessor outputting a clear signal to the data recognition unit and the data detection and latching unit to clear the data recognition unit and the data detecting and latching unit; In the third step, if the key input data of the predetermined bit is scroll data, the data detection and latching unit is cleared, the key processing completion unit receives the scroll data, counts every predetermined time, and then supplies a counting clock to the output requesting unit. An eighth step; A ninth step of receiving, by the output requesting unit, a counting clock from the key processing completion unit, and outputting a scroll interrupt signal to the microprocessor; A tenth step of the microprocessor determining whether a scroll interrupt signal is supplied from the output requesting unit; When the scroll interrupt signal is supplied from the output requesting unit in the tenth step, the microprocessor performs the scroll operation and then moves back to the tenth step. Remote control key data interface method in a car navigation system, characterized in that consisting of. The method of claim 7, wherein A twelfth step of completing the scroll operation by recognizing the scroll completion time when the scroll interrupt signal is not supplied from the output requesting unit in the tenth step; And a thirteenth step of the microprocessor outputting a clear signal to the key processing completion unit to clear the key processing completion unit.

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