KR100395472B1 - Method for detecting multi media card in MP3 player - Google Patents
Method for detecting multi media card in MP3 player Download PDFInfo
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- KR100395472B1 KR100395472B1 KR10-2001-0020562A KR20010020562A KR100395472B1 KR 100395472 B1 KR100395472 B1 KR 100395472B1 KR 20010020562 A KR20010020562 A KR 20010020562A KR 100395472 B1 KR100395472 B1 KR 100395472B1
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- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
- G11B19/122—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of an identification or authentication mark
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- A45C2011/001—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00 for portable audio devices, e.g. headphones or MP3-players
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Abstract
본 발명은, MP3 플레이어의 슬롯에 멀티미디어 카드가 삽입 및 이탈됨을 간단히 인식하여 이를 표시장치에 즉시 표시하는 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법에 관한 것으로서, 각 멀티미디어 카드와 일대일 연결되도록 지정된 마이컴의 각 포트의 값이 예정된 상태에서 변화하는지를 확인하는 제 1단계; 및 상기 지정된 각 포트중에서 그 값이 변화된 포트가 있는 경우, 이 포트에 대응되는 슬롯에 멀티미디어 카드가 삽입된 것으로 판별하는 제 2단계를 포함하여 이루어져, 마이컴이 MMC 삽입 또는 이탈 즉시 그 사실을 간단히 확인할 수 있으며 이를 표시장치를 통해 즉시 표시하므로, 재생동작 중이나 다른 동작의 수행중에도 MMC 삽입여부를 즉시 알 수 있도록 한 유용하고 발명인 것이다.The present invention relates to a method for determining the insertion of a multimedia card in a portable playback device which simply recognizes that a multimedia card is inserted into and detached from a slot of an MP3 player and immediately displays it on a display device. A first step of checking whether the value of the port changes in a predetermined state; And a second step of determining that a multimedia card is inserted into a slot corresponding to the port when there is a port whose value is changed among the designated ports, so that the microcomputer simply confirms the fact immediately upon insertion or departure of the MMC. Since it can be displayed immediately through the display device, it is a useful and invented to immediately know whether the MMC is inserted even during the playback operation or performing other operations.
Description
본 발명은, 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법에 관한 것으로서, 더욱 상세하게는 MP3 플레이어의 슬롯에 멀티미디어 카드가 삽입 및 이탈됨을 간단히 인식하여 이를 표시장치에 즉시 표시하는 방법에 관한 것이다.The present invention relates to a method for determining the insertion of a multimedia card of a portable player, and more particularly, to a method of simply recognizing that a multimedia card is inserted into or removed from a slot of an MP3 player and immediately displaying the same on a display device.
근래들어서 메모리 녹음방식을 이용하는 MP3 플레이어가 개발되어 기록매체 및 기록/재생방식의 판도가 변화되고 있는 실정이다.Recently, MP3 players using a memory recording method have been developed, and the situation of recording media and recording / playback methods is changing.
도1은 일반적인 MP3 플레이어의 구성을 도시한 것으로서, 외부장치(PC)에 연결되어 외부장치와 데이터 전송을 수행하는 USB 칩(10); CPLD(20); MMC(Multi Media Card)(70) 삽입여부를 판단하여 이를 표시부(51)를 통해 출력표시하고, 삽입된 MMC(70)에 대해 재생동작을 수행하는 마이컴(50); 상기 마이컴(50)으로 부터 인가되는 MP3데이터를 디코딩하여 출력하는 MP3 디코더(30); 상기 디코딩되어 출력되는 MP3데이터를 아날로그 신호로 변환출력하는 D/A 변환기(40); 및 상기 MP3 플레이어의 각 구성요소에 DC 전원을 공급하는 DC 전원공급부(60)를 포함하여 구성되어 있다.1 shows a configuration of a general MP3 player, which is connected to an external device (PC) to perform data transfer with the external device (10); CPLD 20; A microcomputer 50 determining whether the MMC 70 is inserted and outputting the same through the display unit 51, and performing a playback operation on the inserted MMC 70; An MP3 decoder 30 for decoding and outputting MP3 data applied from the microcomputer 50; A D / A converter 40 for converting and outputting the decoded MP3 data into an analog signal; And a DC power supply unit 60 for supplying DC power to each component of the MP3 player.
도1의 MP3 플레이어에서는 슬롯(Slot)에 삽입된 멀티미디어 카드(70)의 존재를 인식한 뒤 이에 대한 재생동작 등을 수행하게 되는데, 즉 도2 및 도3에 상세히 도시한 바와 같이 마이컴(50)은 리셋 커맨드(Reset Command)인 0, 1을 'CMD' 포트를 통해 상기 MMC(70)에 전송하고( 도2의 ① ), 상기 리셋 커맨드 전송에 따라 상기 MMC(70)로 부터 수신되는 응답신호(Response)( 도의 ② )로 부터 상기 MMC(70)의 삽입여부를 판별하게 되고, 상기 판별결과를 표시부(51)에 표시하게 된다. 즉 상기 MP3 플레이어에 MMC가 2개까지 삽입될 수 있는 경우에는, 상기 마이컴(50)은 MMC1(71)이 삽입된 것으로 판별되면 상기 표시부(51)의 '1'을 온시키고, MMC2(72)가 삽입된 것으로 판별되면 '2'를 온시키게 된다.The MP3 player of FIG. 1 recognizes the existence of the multimedia card 70 inserted into the slot and performs a playback operation thereof. That is, as shown in detail in FIGS. 2 and 3, the microcomputer 50 is shown. Transmits a reset command 0 and 1 to the MMC 70 through the 'CMD' port (1 in FIG. 2), and a response signal received from the MMC 70 according to the reset command transmission. (Response) (Fig. 2) determines whether the MMC 70 is inserted, and displays the determination result on the display unit 51. That is, when up to two MMCs can be inserted into the MP3 player, when the microcomputer 50 determines that the MMC1 71 is inserted, the microcomputer 50 turns on the '1' of the display unit 51 and the MMC2 72. If is determined to be inserted, '2' is turned on.
그런데, 이와 같은 MMC(70) 삽입여부 판별과정을 MMC(70)의 재생도중에 수행하는 경우에는 MMC(70) 삽입여부 판별을 위한 커맨드 전송 및 응답신호 수신에 따른 시간소요로 인해 재생되는 곡이 중간에 끊기는 현상이 발생하게 된다. 따라서, 일반적으로 MP3 플레이어에서는 MMC(70)가 삽입된 시점이 아니라 현재 재생되는 곡이 바뀌거나 또는 다른 기능이 수행될 때 MMC(70)의 삽입여부를 판별하여 그 판별결과를 표시부(51)를 통해 표시하도록 되어 있다.However, when the MMC 70 is inserted or not during the regeneration of the MMC 70, the music being played back due to the time required for the command transmission and the response signal for the MMC 70 insertion is determined as intermediate. The phenomenon of breaking occurs. Therefore, in general, the MP3 player determines whether the MMC 70 is inserted when the currently played song is changed or other functions are performed, not when the MMC 70 is inserted. To be displayed.
따라서, 이와 같은 종래의 MMC 삽입 판별방법에 있어서는 MMC가 삽입되더라도 이를 즉시 판별하여 표시부를 통해 표시하는 것이 아니어서, 사용자가 MMC 삽입여부를 즉시 알 수 없는 불편한 문제점이 있었다.Accordingly, in the conventional MMC insertion determination method, even if the MMC is inserted, the MMC is not immediately determined and displayed through the display unit, so that the user may not immediately know whether the MMC is inserted.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 창작된 것으로서, 멀티미디어카드의 삽입 및 이탈을 즉시 인식하여 이를 표시장치를 통해 알리는 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법을 제공하는 데, 그 목적이 있는 것이다.Accordingly, the present invention has been made to solve the above problems, and provides a method for determining the insertion of a multimedia card of a portable playback device that immediately recognizes the insertion and departure of a multimedia card and informs it of a display device. It is.
도1은 일반적인 MP3 플레이어의 구성을 도시한 것이고,1 shows a configuration of a general MP3 player,
도2는 종래의 멀티미디어 카드 삽입여부 판별을 위해 도1의 마이컴과 멀티미디어 카드(MMC)간의 커맨드 및 응답신호 전송형태를 도시한 것이고,2 is a view illustrating a command and response signal transmission form between a microcomputer and a multimedia card (MMC) of FIG. 1 to determine whether a conventional multimedia card is inserted.
도3은 도1의 구성에서 종래의 마이컴과 MMC의 내부 연결상태를 상세히 도시한 것이고,Figure 3 illustrates in detail the internal connection state of the conventional microcomputer and MMC in the configuration of Figure 1,
도4는 본 발명에 따른 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법의 바람직한 일 실시예의 흐름을 도시한 것이고,Figure 4 shows the flow of a preferred embodiment of the method for determining the insertion of a multimedia card of a portable player according to the present invention,
도5는 본 발명에 따른 멀티미디어 카드 삽입 판별을 위해 도1의 마이컴과 MMC의 내부 연결상태를 상세히 도시한 것이다.5 illustrates in detail the internal connection state of the microcomputer and MMC of FIG. 1 to determine the insertion of a multimedia card according to the present invention.
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
10 : USB 칩 20 : CPLD10: USB chip 20: CPLD
30 : MP3 디코더 40 : D/A 변환기30: MP3 decoder 40: D / A converter
50 : 마이컴 51 : 표시부50: microcomputer 51: display unit
60 : DC 전원공급부 70 : MMC(멀티미디어 카드)60: DC power supply 70: MMC (Multimedia Card)
상기의 목적을 달성하기 위한 본 발명에 따른 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법은, 각 멀티미디어 카드와 일대일 연결되도록 지정된 마이컴의 각 포트의 값이 예정된 상태에서 변화하는지를 확인하는 제 1단계; 및 상기 지정된 각 포트중에서 그 값이 변화된 포트가 있는 경우, 이 포트에 대응되는 슬롯에 멀티미디어 카드가 삽입된 것으로 판별하는 제 2단계를 포함하여 이루어지는 것에 그 특징이 있는 것이다.In accordance with another aspect of the present invention, there is provided a method of determining a multimedia card insertion of a portable player according to an embodiment of the present invention, comprising: a first step of checking whether a value of each port of a microcomputer designated to be connected one-to-one with a multimedia card changes in a predetermined state; And a second step of determining that a multimedia card is inserted into a slot corresponding to the port when there is a port whose value is changed among the designated ports.
이하, 본 발명에 따른 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법의 바람직한 실시예에 대해, 첨부된 도면에 의거하여 상세히 설명한다.Best Mode for Carrying Out the Invention A preferred embodiment of the method for determining the insertion of a multimedia card of a portable player according to the present invention will be described in detail with reference to the accompanying drawings.
도4는 본 발명에 따른 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법의 바람직한 일 실시예의 흐름을 도시한 것으로서, 이하 도1의 구성을 참조하여 본 발명에 따른 도4의 판별방법에 대해 상세히 설명한다.Figure 4 shows the flow of a preferred embodiment of the method for determining the insertion of a multimedia card of a portable playback apparatus according to the present invention. Hereinafter, the method of FIG. 4 according to the present invention will be described in detail with reference to the configuration of FIG.
우선, 상기 MP3 플레이어에 두 개의 MMC(71, 72)가 삽입가능한 것으로 가정한 상태에서, 각 MMC(71, 72)에는 도5에 도시한 바와 같이 두개의 GND 단자(3, 6번 핀)가 각각 있어, 이 두개의 GND 단자가 내부적으로 서로 연결되어 있으며, 또한 상기 마이컴(50)에는 두 개의 포트(포트1, 포트2)가 있어, 각 포트와 삽입되는 각MMC(71, 72)가 일대일 연결되게 된다.First, assuming that two MMCs 71 and 72 can be inserted into the MP3 player, each of the MMCs 71 and 72 has two GND terminals (pins 3 and 6) as shown in FIG. Each of these two GND terminals are internally connected to each other, and the microcomputer 50 has two ports (port 1, port 2), and each MMC (71, 72) inserted into each port is one-to-one. Will be connected.
이와 같은 상태에서, 상기 마이컴(50)이 MP3곡이 녹음되어 있는 MMC(70)의 재생시에는, MMC(70)로 부터 독출되는 데이터를 512바이트씩 MP3 디코더(30)에 전송함으로써 재생동작이 이루어지게 된다.In this state, when the microcomputer 50 plays back the MMC 70 in which MP3 songs are recorded, the playback operation is performed by transmitting data read from the MMC 70 to the MP3 decoder 30 by 512 bytes. You lose.
상기 마이컴(50)은 이와 같은 재생동작 중이나 또는 다른 기능의 수행중에도 MMC(70)의 삽입여부를 수시로 판별하게 되는데, 이를 위해 상기 마이컴(50)은 내부 포트1과 포트2의 상태를 계속해서 확인하게 되는데(S10), 이 포트들은 슬롯에 MMC(70)가 삽입되지 않은 상태에서는 내부적으로 일정전압을 유지하고 있는 Pull-Up 상태인데, 만약 MMC(70)가 슬롯에 삽입되면 포트1, 2가 GND에 연결되도록 되어 있어, 상기 마이컴(50)은 포트1, 2의 상태가 GND 상태인지를 확인함으로써(S20) MMC(70) 삽입여부를 간단히 판별할 수 있게 된다. 즉, 상기 마이컴(50)이 포트1의 상태를 GND로 확인하게 되면 MMC1(71)이 삽입된 것으로 판별하고, 포트2의 상태를 GND로 확인하게 되면 MMC2(72)가 삽입된 것으로, 그리고 포트1 및 포트2의 상태가 모두 GND인 경우에는 MMC1(71) 및 MMC2(72)가 모두 슬롯에 삽입된 것으로 판별하게 된다(S21).The microcomputer 50 determines whether the MMC 70 is inserted from time to time during the regeneration operation or performing other functions. For this purpose, the microcomputer 50 continuously checks the states of the internal ports 1 and 2. (S10) These ports are pull-up state that maintains a constant voltage internally when the MMC (70) is not inserted into the slot, if the MMC 70 is inserted into the slot port 1, 2 Since the microcomputer 50 is connected to GND, the microcomputer 50 can easily determine whether the MMC 70 is inserted by checking whether the ports 1 and 2 are in the GND state (S20). That is, when the microcomputer 50 confirms the state of the port 1 to GND, it is determined that the MMC1 71 is inserted. When the microcomputer 50 confirms the state of the port 2 to GND, the MMC2 72 is inserted. If both the state 1 and the port 2 are GND, it is determined that both the MMC1 71 and the MMC2 72 are inserted into the slot (S21).
이와 같이 포트1, 2의 상태확인에 의해 MMC(70) 삽입여부가 간단히 판별되면, 상기 마이컴(50)은 전술한 바와 같이 상기 표시부(51)를 통해 이를 즉시 표시하게 된다(S22).As described above, if the MMC 70 is easily inserted or not by the status check of the ports 1 and 2, the microcomputer 50 immediately displays it through the display unit 51 as described above (S22).
상기와 같이 이루어지는 본 발명에 따른 휴대용 재생기기의 멀티미디어 카드 삽입 판별방법은, MMC가 삽입되면 마이컴 내부의 지정된 포트의 값이 변화되도록 되어 있어, 마이컴이 MMC 삽입 또는 이탈 즉시 그 사실을 간단히 확인할 수 있으며 이를 표시장치를 통해 즉시 표시하므로, 재생동작 중이나 다른 동작의 수행중에도 MMC 삽입여부를 즉시 알 수 있도록 한 유용하고 편리한 발명인 것이다.In the multimedia card insertion determination method of the portable player according to the present invention as described above, the value of the designated port inside the microcomputer is changed when the MMC is inserted. Since it is displayed immediately through the display device, it is a useful and convenient invention to immediately know whether the MMC is inserted even during the playback operation or performing other operations.
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JPH01292488A (en) * | 1988-05-19 | 1989-11-24 | Sanyo Electric Co Ltd | Memory card replacement detecting system |
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JPS63279390A (en) * | 1987-05-12 | 1988-11-16 | Nec Home Electronics Ltd | Connection detecting device |
JPS6436301A (en) * | 1987-07-31 | 1989-02-07 | Toshiba Corp | Electronic equipment device |
JPH01292488A (en) * | 1988-05-19 | 1989-11-24 | Sanyo Electric Co Ltd | Memory card replacement detecting system |
KR900013383A (en) * | 1989-02-23 | 1990-09-05 | 아오이 죠이치 | Personal computer using memory card as video RAM |
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