CN101166034B - Card-insertable audio playback device and method for identifying the card - Google Patents

Abstract

Translated fromChinese

一种设有插卡卡座的音频播放装置、卡型FM接收装置和插入卡的识别方法，涉及音频播放装置和FM接收装置。音频播放装置，包括音频播放器的相关元件、控制模块和SD/MMC卡座。FM卡包括电路板，其上安装接收芯片；设置有SD/MMC卡连接插脚。音频播放装置插入卡的识别方法，卡座设有开关，卡插入时，触动开关，产生信号送到控制模块；控制模块发送指令对插入卡提供电源，并向插入卡发送检测信息和接收插入卡的回复以识别插入卡的类型；启动与卡相对应的工作模块。本发明针对FM收音部分及其外围设备做了改进。将FM收音部分安置在SD卡结构内。允许MP3等播放设备上所带SD卡座可兼容SD卡，MMC卡及FM收音卡。

An audio player device with a card holder, a card-type FM receiving device and an identification method for an inserted card, and relates to an audio player device and an FM receiving device. The audio player device comprises relevant components of an audio player, a control module and an SD/MMC card holder. The FM card comprises a circuit board on which a receiving chip is mounted; and an SD/MMC card connection pin is provided. In the identification method for an inserted card of an audio player device, the card holder is provided with a switch, and when the card is inserted, the switch is triggered to generate a signal to the control module; the control module sends an instruction to provide power to the inserted card, sends detection information to the inserted card, and receives a reply from the inserted card to identify the type of the inserted card; and starts a working module corresponding to the card. The present invention makes improvements to the FM radio part and its peripheral equipment. The FM radio part is placed in the SD card structure. The SD card holder on the MP3 and other playing devices is allowed to be compatible with SD cards, MMC cards and FM radio cards.

Description

But the audio playing apparatus of plug-in card and the recognition methods of inserting card

Technical field

The present invention relates to be provided with the audio playing apparatus and the FM receiving system of plug-in card deck, particularly have the digital audio file playing device of SD deck and the recognition methods of inserting card.

Background technology

FM broadcasting is a very mature technique, in preceding half a century, is widely used in all over the world.It can send information to mass audience reliably with lower price, acceptable sound quality.So the FM broadcast receiver almost is integrated among the various forms of consumption electronic products.Up to now, all FM radio functions all are that the mode with the standalone feature module is fixedly mounted among the equipment.In other words, when increasing the FM radio function in the consumption electronic product, all be that whole FM function of radio receiver circuit is fixedly mounted in this consumption electronic product, become whole indivisible some.But along with miniaturization, the diversification of existing digital product, the FM radio function is fixed on that to become indivisible part in the audio-frequence player device undesirable.

Summary of the invention

One of the object of the invention is to provide a kind of audio playing apparatus that inserts the card deck that is provided with.

Two of the object of the invention is to provide a kind of SD card type FM receiving card.

Three of the object of the invention is to provide a kind of recognition methods of FM receiving card insertion.

One of the object of the invention can be realized like this, designs a kind of audio playing apparatus that is provided with the plug-in card deck, comprises amplifirer, control module and general input/output interface, and amplifirer is connected with control module with general input/output interface; Also be provided with the SD/MMC deck, be provided with the SD/MMC card connector in the said SD/MMC deck; The switch of a link control module is set at least, through one or more pin positions of switch control SD/MMC card connector and being connected of amplifirer and one or more pin positions of general input/output interface.

Two of the object of the invention can be realized like this, designs a kind of card type FM receiving system, comprises circuit board, and receiving chip is installed on the circuit board; Be provided with SD/MMC card connection pin.

Three of the object of the invention can be realized like this, designs the recognition methods that a kind of audio playing apparatus that is provided with the plug-in card deck inserts card, is provided with switch at the SD deck, and when card inserted, touch switch produced signal and delivers to control module; Control module is sent instruction and to inserting to block power supply is provided, and sends detection information to the insertion card and insert the type of blocking with identification with the answer of reception insertion card; Start and the corresponding operational module of card.

The size and the ancillary equipment thereof that the present invention is directed to FM radio reception part have been done improvement by a relatively large margin.FM radio reception partly is placed in the SD card structure.This new improved circuit structure allow on the audio-frequence player device such as MP3 with the SD deck can compatible normal SD card, mmc card and FM radio reception card.

Description of drawings

Fig. 1 is the sketch map of electric part of the audio playing apparatus of preferred embodiment of the present invention.

Fig. 2 is the circuit board section sketch map of the FM radio reception card of preferred embodiment of the present invention.

Fig. 3 is the circuit board section thickness sketch map of the FM radio reception card of preferred embodiment of the present invention.

Fig. 4 is the get stuck sketch map of body of the FM radio reception of preferred embodiment of the present invention.

Fig. 5 is the deck peripheral circuit calcspar of one of preferred embodiment of the present invention.

Fig. 6 is the testing process figure of the insertion card of one of preferred embodiment of the present invention.

Fig. 7 is the communications protocol flow chart of the detection FM card of one of preferred embodiment of the present invention.

Embodiment

Below in conjunction with embodiment the present invention is done further description.

Like Fig. 1, shown in Figure 5, a kind of audio playing apparatus that is provided with the plug-in card deck comprises amplifirer, control module and general input/output interface, and amplifirer is connected with control module with general input/output interface; Also be provided with the SD/MMC deck, be provided with the SD/MMC card connector in the said SD/MMC deck; The switch of a link control module is set at least, through one or more pin positions of switch control SD/MMC card connector and being connected of amplifirer and one or more pin positions of general input/output interface.The present invention is provided with a card insertion base on the basis of existing digital audio file playing device (like mp3, mp4 player or the like); One end and the exterior of SD/MMC deck.When deck inserts the FM card, make it can receive and play the FM broadcast program.As shown in Figure 1, audio playing apparatus also comprises display, memory, keyboard, and said control module comprises processor (CPU), decoder, power supervisor, display controller, and display, memory, keyboard are connected with control module.Card holder connector in the SD deck is connected to the general I/O port of control module, two-way is arranged respectively through analog switch 10 in the card holder connector, and switch 10 wherein one the tunnel is connected with amplifirer, and another road is connected to the general I/O port of control module; The button that on shell, manifests also is connected to the general I/O port of control module, and control module is given in keying input information or instruction; The display that on shell, manifests is connected to control module, is controlled by display controller; Memory is connected with control module; Power supply can be provided also by battery can make external power supplier.The annexation of the electronic component of existing digital audio file playing device (like mp3, mp4 player or the like) can be obtained in disclosed data, just is not described in detail at this.

The driver module that FM is set can be arranged in the control module; Also can be provided with separately, make the FM driver module, control by control module like an independent IC.

Be provided with switch 9 in the said deck.Switch 9 is used for sending an information to control to deck conveying/deenergization to control module.

It is special-purpose as the FM card to reserve three sockets in the deck.As shown in Figure 5, the socket in the said SD deck is provided with two sound channels input sockets and a connection socket for antenna, and an antenna is set is connected with connection socket for antenna.The 8th, 9 socket correspondences in the deck of SD described in the present embodiment are set to the socket of stereosonic two input sound channels of FM, and the 6th socket is ground wire and antenna duplexer socket.Other socket then is used for digital communication.

Said switch is a double switch; Be provided with an input, two outputs and a control end; Input is connected with a pin position of SD/MMC card connector; One output is connected with amplifirer, and another output is connected with a pin position of general input/output interface, and control end connects to select corresponding output with control module.If what insert is the FM card, control module is sent out a signal, the output that the switch conduction input is connected with amplifirer to control end; If what insert is other card, control module is sent out a signal, the output that the switch conduction input is connected with general input/output interface to control end.

The signal of SD card and mmc card turnover is digital signal fully, but the FM card then is mixed with the FM antenna input of simulation or the output signal of audio frequency.Select for use two pin positions 8 of on the SD/MMC card, the most seldom using and 9 to be stereosonic two output channels of FM.Because this is the path of audio signal, so the peripheral circuit that cooperates should select for use a pair of analog switch 10 to shunt this two signals.Analog switch 10 is a double switch, and an input is arranged, two outputs and a control end.Wherein a switch input terminal is connected with pin position 8, and the input of another switch is connected with pin position 9; One output of switch 10 is connected with amplifirer, and another output is connected with general I/O port; Control end is connected with control module, and control module control switch 10 makes pin position 8,9 be connected with amplifirer or be connected with general I/O port.This must be able to provide enough passband frequency ranges to analog switch 10, to prevent the being distortion that bandwidth causes audio frequency inadequately.This must can provide enough channel separation to analog switch simultaneously, goes up the interference of GPIO pin position to audio frequency to prevent CPU.The chip that closes condition has 74HC4053 series and serial with the analog switch of similar CMOS explained hereafter.

As shown in Figure 5, because some character of exporting into signal of FM broadcast receiver and SD card has suitable difference, when taking the contact on the SD card, must match cautiously signal so go into when the output of FM.The pin position of said SD/MMC card connector is provided with one day stitch position, and an antenna is connected with this pin position.The stitch position also connected a ground wire in said day.Correspondence is provided with the end pin that 2 pin positions are stereosonic two output channels of FM on the card base position of card type FM receiving system, and a pin position is ground wire and antenna duplexer pin position.In the present embodiment, the 8th, 9 pin positions of said card base position are the end pin of stereosonic two output channels of FM, and the 6th pin position is ground wire and antenna duplexer pin position.

Audio playing apparatus is provided with and is used for recognizing the identification module of inserting the deck Card Type, the type that discrimination module is differentiated card when card the inserts row communication of going forward side by side.In memory, be provided with the communications protocol data of interrogating with the FM cartoon, be used to discern the FM card.As shown in Figure 1, memory is a flash memory.

A kind of card type FM receiving system that is used to be provided with the audio playing apparatus of plug-in card deck comprises circuit board 2, and receiving chip 3 is installed on the circuit board; Be provided with SD/MMC card connection pin.

Usually also comprisehousing 1, be provided with circuit board 2 in the saidhousing 1, receiving chip 3 is installed on the circuit board, require to be provided with crystal oscillator 4, resistance 5, electric capacity 6, diode 7 at the end pin of the peripheral corresponding chip of receiving chip 3.Below utilize the reasonable distribution mode of main components and parts on circuit board, FM is received module be placed in the feasibility in the SD/MMC card size shell.

Like Fig. 2, shown in Figure 3, saidhousing 1 is of a size of (30～31) * (21.5～23) * (1.9～2.1) millimeter, and housing wall thickness D1 is equal to or less than 0.3 millimeter; The height of said chip 3, crystal oscillator 4, resistance 5, electric capacity 6, diode 7 is less than 1.1 millimeters, and the thickness D4 of circuit board 2 and components and parts stack is less than 1.4 millimeters.

In the present embodiment, first components and parts paid close attention to are receiving chips 3 of FM.This chips can be selected the TEA5767HN like PHILIPS for use.It is the core of whole design, and overall height is 1.0MM.The important components and parts of next are crystal oscillator 4, and selected frequency is 32.768KHZ.This must be earlier with the thinnest a kind of, can make it highly be lower than receiving chip 3.In fact, at present the highest in the used components and parts with the height of one group of electrochemical capacitor 6, even minimum element also reaches 1.1MM.So thick (height) that components and parts allow degree must be with this as adjusting the limit.

The thickness D3 that another factor that influences this receiver module thickness is a circuit board 2.The thinnest high-strength F R4 circuit board is that 0.3MM is thick at present.On circuit board, each components and parts all must be placed in one side to reduce gross thickness.

The thickness D1 of plastic casing, covers respectively is 0.3MM, altogether 0.6MM.So if with upper and lower cover, circuit board and the thickest components and parts stack, gross thickness is 2.0MM, is less than the standard 2.1MM of SD card slightly.Stay 0.1MM as allowable tolerance.

Fig. 4 is the sketch map of housing.Wherein go uplower cover 11 and 12 by injection molded production.Their thickness can not surpass 0.3MM, and the space of maximum is provided for thecavity 13 of centre.So its total height of FM module (comprising FM receiver module+circuit board) that can place in thecavity 13 can reach 1.5MM.

Also be provided with filler in thehousing 1 formedinner space 13 of said SD card type FM receiving system.After in the FM receiver circuit is placed incavity 13 fully, its remaining space can select for use filler to fill up to gain in strength, further protective circuit and components and parts.Filler is the filler that does not hinder the filler of heat radiation or help to dispel the heat, like thermal grease.

Because a large amount of portable consumer electronic products all possess the SD/MMC card slot, the present invention is another optional equipment that the FM broadcast receiver that this SD card is built-in becomes the SD/MMC slot.

Though be a FM receiving card design, but still needed the support of some peripheral facilities.These ancillary equipment have comprised external antenna, power supply, power amplifier and loud speaker or earphone etc.They all will be through the SD deck, existing contact links to each other with the FM receiver on the SD card.Reception antenna also can be placed on the receiving card.

In addition, the 6th pin is chosen as ground wire and the FM aerial signal is shared.It stitch position is connected with a high frequency filter.This aerial signal is led to the inlet of antenna on the FM broadcast receiver chip after FM card inside will be through High frequency filter.Could guarantee the integrality of ground wire like this, reduce noise.

A kind of audio playing apparatus inserts the recognition methods of card, is provided with switch at the SD deck, and when card inserted, touch switch produced signal and delivers to control module; Control module is sent instruction and to inserting to block power supply is provided, and sends detection information to the insertion card and insert the type of blocking with identification with the answer of reception insertion card; Start and the corresponding operational module of card.

When card did not insert, the power supply of leading to the SD/MMC deck was cut.One mechanical switch 9 is arranged on deck.When having card to insert, this mechanical switch can be touched at every turn, and producing the signalisation control module has card to insert.At this moment, control module begins through the card power supply to inserting of SD/MMC deck, and starting a formula, to detect what inserted be the FM card of SD card, mmc card or particular design.

Said control module is in regular turn to inserting the communications protocol that card sends SD card, mmc card, FM card.This communications protocol has been supported the SD card, the hot-swappable function of mmc card and FM.

But the ordering combination in any of the communications protocol of said transmission SD card, mmc card, FM card.Can send by the order of mmc card, FM card, SD card, also can be by the order transmission of FM card, SD card, mmc card etc., do not enumerate one by one at this.

As shown in Figure 6, said control module is sent SD cartoon news agreement to inserting card, if the return information that receives is legal, control module sets up SD to be stuck in the sign of position; If the return information that receives can not reflect the existence of SD card, then control module is sent the mmc card communications protocol to inserting card, if the return information that receives is legal, control module is set up mmc card sign on the throne; If the return information that receives can not reflect the existence of mmc card, then control module is sent FM cartoon news agreement to inserting card, if the return information that receives is legal, control module sets up FM to be stuck in the sign of position; Otherwise the information that shows bad card or unknown card.

In this set sign is to prepare for next procedure Selection starts corresponding software module.

After said FM card was identified, the parameter that set before last time, the FM card was pulled out is searched and called in to control module in memory.

As shown in Figure 7, said control module writes a provisioning information to the chip of FM card, and then from then on chip is read; Sense information is compared with preassigned pattern, if both are identical, then indicate the FM card and inserts.

Because the FM card is different with the SD/MMC card, do not have a kind of standard communications protocol, so a kind of in the communications protocol that present embodiment is contained for the present invention is mainly fit applications TEA5767HN chip.

This detection communications protocol is the function that writes and read of utilizing chip to provide; By control module; Write an information specific earlier to chip, and then read from chip, sense information is compared identical like the two with preassigned pattern; Prove that then the FM card inserts, otherwise proof there is not the FM card that correctly can move to be inserted into.This process will repeat with different information materials, increase degree of safety.

Must be noted that the customizing messages that is write must be correct, can be accepted by chip, otherwise chip may be rejected and cause and obscure.

Below be an example that is used to check the FM communications protocol that adopts the TEA5767HN chip, will write the data of five bytes to the FM card, read five bytes then, change data then, repeat once again at this main control module.

The primary data that write are:

Byte	Content
		1	10101111
2	11001010
		3	00110110
4	00011110
		5	01XXXXXX

The data of reading for the first time should be:

Byte	Content
		1	XX101111
2	11001010
		3	XXXXXX
4	XXXX0000
		5	00000000

Write for the second time data:

BYTE	Content
			1	10011111
2	01010010
		3	00110110
4	00001110
		5	01XXXXXX

Sense data for the second time

BYTE	Content
			1	XX011111
2	01010010
		3	XXXXXXXX
4	XXXX0000
		5	00000000

Represent that at thisX 0 or 1 all can.

If two times result shows correct, can conclude that then the FM card correctly inserts, do not insert otherwise can infer the FM card, or do not insert the location, or block mistake.

Claims (6)

Translated fromChinese

1.一种设有插卡卡座的音频播放装置，包括功放器、控制模块、FM驱动模块和通用输入/输出接口，功放器和通用输入/输出接口与控制模块连接，FM驱动模块由控制模块控制；其特征在于：还设有SD/MMC卡座，所述SD/MMC卡座内设有SD/MMC卡连接器；以及设有用于辨别插入卡类型的辨别模块，当卡插入时辨别模块分辨卡的类型并进行通讯；至少设置一个连接到控制模块的开关，通过所述开关控制SD/MMC卡连接器的一个以上脚位同功放器以及通用输入/输出接口的一个以上脚位的连接，其中，所述开关为两路开关，设有一输入端、两个输出端和一控制端，输入端与SD/MMC卡连接器的一个脚位连接，一输出端与功放器连接，另一输出端与通用输入/输出接口的一脚位连接，控制端与控制模块连接以选择对应的输出；且其中：1. A kind of audio playback device that is provided with card slot, comprises power amplifier, control module, FM drive module and general input/output interface, power amplifier and general input/output interface are connected with control module, and FM drive module is controlled by Module control; it is characterized in that: it is also provided with an SD/MMC card holder, and an SD/MMC card connector is provided in the SD/MMC holder; The module distinguishes the type of the card and communicates; at least one switch connected to the control module is set, through which the switch controls more than one pin position of the SD/MMC card connector to be the same as the power amplifier and more than one pin position of the general input/output interface connection, wherein, the switch is a two-way switch, which is provided with an input terminal, two output terminals and a control terminal, the input terminal is connected with a pin of the SD/MMC card connector, an output terminal is connected with the power amplifier, and another An output terminal is connected to a pin of the general input/output interface, and the control terminal is connected to the control module to select the corresponding output; and wherein:若在所述SD/MMC卡座中插入的是FM卡，则所述控制模块向所述控制端发出信号以指示所述开关导通所述输入端与所述功放器连接的输出端；If an FM card is inserted in the SD/MMC card holder, the control module sends a signal to the control terminal to instruct the switch to turn on the output terminal connected to the input terminal and the power amplifier;若在所述SD/MMC卡座中插入的是其它卡，则所述控制模块向所述控制端发出信号以指示所述开关导通所述输入端与所述通用输入/输出接口连接的输出端。If other cards are inserted in the SD/MMC card holder, the control module sends a signal to the control terminal to instruct the switch to turn on the output that the input terminal is connected to the general input/output interface end.2.根据权利要求1所述的音频播放装置，其特征在于：还包括显示器、存储器、键盘，所述控制模块包括处理器(CPU)、解码器、电源管理器、显示控制器，显示器、存储器、键盘与控制模块连接。2. audio playback device according to claim 1, is characterized in that: also comprise display, memory, keyboard, and described control module comprises processor (CPU), decoder, power manager, display controller, display, memory , The keyboard is connected with the control module.3.根据权利要求1所述的音频播放装置，其特征在于：所述SD/MMC卡连接器的脚位设有一天线脚位，一天线与该脚位连接。3. The audio playback device according to claim 1, characterized in that: the pin of the SD/MMC card connector is provided with an antenna pin, and an antenna is connected to the pin.4.根据权利要求3所述的音频播放装置，其特征在于：所述天线脚位还连接一地线。4. The audio playback device according to claim 3, wherein the antenna pin is also connected to a ground wire.5.一种设有插卡卡座的音频播放装置插入卡的识别方法，其特征在于：在SD/MMC卡座设有开关，卡插入时，触动开关，产生信号送到控制模块；控制模块发送指令对插入卡提供电源，并向插入卡发送检测信息和接收插入卡的回复以识别插入卡的类型；启动与卡相对应的工作模块，其中，向所述插入卡发送所述检测信息和接收所述插入卡的回复以识别所述插入卡的类型包括：5. An identification method for an audio playback device inserted into a card holder, characterized in that: the SD/MMC holder is provided with a switch, and when the card is inserted, the switch is touched to generate a signal and sent to the control module; the control module Send an instruction to provide power to the plug-in card, and send detection information to the plug-in card and receive a reply from the plug-in card to identify the type of the plug-in card; start a working module corresponding to the card, wherein, send the detection information and the plug-in card to the plug-in card Receiving a reply from the inserted card to identify the type of the inserted card comprises:所述控制模块向插入卡发送SD卡通讯协议，若接收的回复信息合法，控制模块设立SD卡在位的标示；The control module sends the SD card communication protocol to the plug-in card, and if the received reply information is legal, the control module sets up the sign that the SD card is in place;若接收的回复信息不能反映SD卡的存在，则控制模块向插入卡发送MMC卡通讯协议，若接收的回复信息合法，控制模块设立MMC卡在位的标示；If the received reply information cannot reflect the existence of the SD card, the control module sends the MMC card communication protocol to the plug-in card, and if the received reply information is legal, the control module sets up the mark that the MMC card is in place;若接收的回复信息不能反映MMC卡的存在，则控制模块向插入卡发送FM卡通讯协议，若接收的回复信息合法，控制模块设立FM卡在位的标示；否则显示坏卡或未知卡的信息，其中，所述控制模块向所述FM卡的芯片写入第一规定信息，所述芯片读出第一读出信息，所述控制模块向所述FM卡的芯片写入与所述第一规定信息不同的第二规定信息，所述芯片读出第二读出信息，将所述第一读出信息与所述第二读出信息与预定模式相比较，如果所述第一读出信息与所述第二读出信息与所述预定模式相同，则标示所述FM卡插入。If the received reply information does not reflect the existence of the MMC card, the control module sends the FM card communication protocol to the inserted card. If the received reply information is legal, the control module sets up the FM card in-position mark; otherwise, it displays the information of a bad card or an unknown card. , wherein, the control module writes the first specified information to the chip of the FM card, and the chip reads the first readout information, and the control module writes the first specified information to the chip of the FM card, which is consistent with the first Second prescribed information different from the prescribed information, the chip reads out the second readout information, compares the first readout information with the second readout information with a predetermined pattern, and if the first readout information If the second read information is the same as the predetermined mode, it indicates that the FM card is inserted.6.根据权利要求5所述的识别方法，其特征在于：所述FM卡被确认后，控制模块在存储器内查找并调入上次FM卡被拔出前所设定的参数。6. The identification method according to claim 5, characterized in that: after the FM card is confirmed, the control module searches in the memory and transfers the parameters set before the FM card was pulled out last time.

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