CN103929675A - Communication implementation method of set top box and set top box - Google Patents
Communication implementation method of set top box and set top box Download PDFInfo
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- CN103929675A CN103929675A CN201410123243.4A CN201410123243A CN103929675A CN 103929675 A CN103929675 A CN 103929675A CN 201410123243 A CN201410123243 A CN 201410123243A CN 103929675 A CN103929675 A CN 103929675A
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Abstract
The invention belongs to the technical field of set top boxes, and provides a communication implementation method of a set top box and the set top box. The method includes the steps that when the set top box is started, the set top box detects whether a Loader program of the set top box is damaged or not through an STM32 chip; if the STM32 chip judges that the Loader program is not damaged, a main program of the set top box is started; when a cassette of the set top box detects that a smart card is inserted in, the STM32 chip is notified; the STM32 chip sends data of the smart card to a main chip of the set top box. According to the communication implementation method of the set top box and the set top box, the useable area of a PCB and the use number of I/O ports of the main chip of the set top box are greatly reduced, and communication safety of the set top box is greatly improved.
Description
Technical field
The invention belongs to set-top box technique field, relate in particular to a kind of Realization Method of Communication and Set Top Box of Set Top Box.
Background technology
Prior art is in the double-path intelligent cartoon news circuit design of Set Top Box, need two TDA8024 process chip and two intelligent card interfaces, require the master chip of Set Top Box that the I/O(Input/Output of two-way is provided simultaneously, input and output) mouth, this two-way I/O mouth at least comprises 10 I/O mouths, wherein, each smart card communication needs minimum 5 I/O mouths, and these 5 necessary I/O mouths are respectively used to VCC supply pin, CLK clock pin, RST resetting pin, IO data pin and Detect and detect pin.
In addition, the safety verification program carrying in flash memory when Set Top Box of the prior art is generally dispatched from the factory by Set Top Box is carried out security test, and fail safe is lower.
In sum, existing Set Top Box communication implementation needs larger PCB(Print Circuit Board, printed circuit board) area also takies the I/O mouth of Set Top Box master chip in a large number, and the communication implementation fail safe of existing Set Top Box is low.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of Realization Method of Communication of Set Top Box, is intended to solve the I/O mouth that existing Set Top Box communication implementation needs larger PCB area and takies in a large number Set Top Box master chip, and the low problem of fail safe.
The embodiment of the present invention is achieved in that a kind of Realization Method of Communication of Set Top Box, comprising:
When described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection;
If described STM32 chip judges that described loader utility is not destroyed, start the main program of described Set Top Box;
When the deck of described Set Top Box has detected smart card insertion, notify described STM32 chip;
Described STM32 chip sends to the data of described smart card the master chip of described Set Top Box.
Another object of the embodiment of the present invention is to provide a kind of Set Top Box, comprising:
Loader detection module, for when described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection;
Main program starts module, if judge that for described STM32 chip described loader utility is not destroyed, starts the main program of described Set Top Box;
Smart card recognition module, while smart card insertion having been detected for the deck when described Set Top Box, notifies described STM32 chip;
Data forwarding module, sends to the data of described smart card the master chip of described Set Top Box for described STM32 chip.
The embodiment of the present invention is by when Set Top Box starts, using the entry condition of the not destroyed main program as Set Top Box of STM32 chip judgement loader utility, again by STM32 chip by the data retransmission of smart card the master chip to Set Top Box, thereby greatly reduced the usage quantity of the usable floor area of PCB and the I/O mouth of Set Top Box master chip, and greatly improved the communications security of Set Top Box.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the Realization Method of Communication of the Set Top Box that provides of the embodiment of the present invention;
Fig. 2 is the specific implementation flow chart of the Realization Method of Communication S101 of the Set Top Box that provides of the embodiment of the present invention;
Fig. 3 is the structured flowchart of the Set Top Box that provides of the embodiment of the present invention;
Fig. 4 is the structured flowchart of the Set Top Box that provides of another embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention is by when Set Top Box starts, using the entry condition of the not destroyed main program as Set Top Box of STM32 chip judgement loader utility, again by STM32 chip by the data retransmission of smart card the master chip to Set Top Box, thereby greatly reduced the usage quantity of the usable floor area of PCB and the I/O mouth of Set Top Box master chip, and greatly improved the communications security of Set Top Box.
Fig. 1 shows the realization flow figure of the Realization Method of Communication of the Set Top Box that the embodiment of the present invention provides, and details are as follows:
In S101, when described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection.
Set-top-box system software comprises main program and loader utility.When Set Top Box starts, first the loader utility in flash memory Flash is moved.After STM32 chip initiation in Set Top Box completes, detect loader utility and whether attacked or distort when starting.
Loader is downloader, is the pith in set-top-box system software.The upgrading of set-top box application software is provided loader utility, the functions such as implantation of the startup of Set Top Box and Set Top Box new business, and its stability directly affects the use of Set Top Box.Therefore,, in the start-up course of Set Top Box, by STM32 chip, loader utility is detected significant.
Fig. 2 shows the specific implementation flow chart of the Realization Method of Communication S101 of the Set Top Box that the embodiment of the present invention provides, with reference to Fig. 2:
In S201, when described Set Top Box starts, the auxiliary code of described loader utility generation in service is compared with the check code of pre-stored in described STM32 chip;
In S202, if described auxiliary code is consistent with described check code, described STM32 chip judges that described loader utility is not destroyed;
In S203, if described auxiliary code and described check code are inconsistent, described STM32 chip judges that described loader utility is destroyed.
As one embodiment of the present of invention, at STM32 chip internal, there is a fixing check code, when each Set Top Box starts, loader utility generates auxiliary code in the process of operation.If loader utility is not destroyed, the auxiliary code that loader utility generates in the process of operation is consistent with the check code of pre-stored in STM32 chip; If loader utility is destroyed, loader utility in the process of operation, generate with STM32 chip in the inconsistent auxiliary code of check code of pre-stored.Here, loader utility is destroyed refers to that loader utility is attacked or distorted, as malice writes etc.
Preferably, adopt CRC(Cyclic Redundancy Check, cyclic redundancy check (CRC) code) to whether loader utility is destroyed, test.
In S102, if described STM32 chip judges that described loader utility is not destroyed, start the main program of described Set Top Box.
As one embodiment of the present of invention, STM32 chip, in the situation that guaranteeing that loader utility is not attacked or distorted, just allows the main program of starter motor top box.
Further, described method also comprises:
If described STM32 chip judges that described loader utility is destroyed, do not allow to start the main program of described Set Top Box.
After STM32 chip judges that loader utility is destroyed, do not allow to start main program, thereby the read-write of Flash is protected, prevent that the content in Flash from being attacked or distorting, strengthened the fail safe of Set Top Box.
In S103, when the deck of described Set Top Box has detected smart card insertion, notify described STM32 chip.
As one embodiment of the present of invention, when the Detect(of the deck of Set Top Box detects) pin has been when smart card having been detected and having inserted, this Detect human hair combing waste send a low pulse to the communication interface of the STM32 chip being connected with this deck to notify STM32 chip.
Further, described Set Top Box comprises 2 described decks;
The serial peripheral equipment interface SPI of described STM32 chip is connected one by one with described deck.
In embodiments of the present invention, Set Top Box comprises 2 decks, is respectively the first deck and the second deck.Two groups of SPI(Serial Peripheral Interface of STM32 chip configuration, Serial Peripheral Interface (SPI)) respectively as the first communication interface and second communication interface, the first communication interface is connected with the first deck, and second communication interface is connected with the second deck.
When the Detect of the first deck pin has detected smart card insertion, this Detect human hair combing waste send low pulse to the first communication interface with notice STM32 chip; When the Detect of the second deck pin has detected smart card and has inserted, this Detect human hair combing waste send a low pulse to second communication interface with notice STM32 chip.
In S104, described STM32 chip sends to the data of described smart card the master chip of described Set Top Box.
STM32 chip is received the data of the smart card on the first deck and by second communication interface, is received after the data of the smart card on the second deck by the first communication interface, and the data retransmission of smart card to the master chip of Set Top Box is processed.
Preferably, described in S104, STM32 chip sends to the master chip of described Set Top Box to comprise the data of described smart card:
Described STM32 chip is converted to the data of described smart card after the data that meet general-purpose serial bus USB agreement, then is forwarded to the master chip of described Set Top Box.
As one embodiment of the present of invention, STM32 chip is received the data of the smart card on the first deck and by second communication interface, is received after the data of the smart card on the second deck by the first communication interface, according to ISO7816 agreement, the data of smart card are converted to and are applicable to USB(Universal Serial Bus, USB) after the data of transmission, then the master chip that is transmitted to Set Top Box is processed.
Fig. 3 shows the structured flowchart of the Set Top Box that the embodiment of the present invention provides.With reference to Fig. 3, wherein, MCU(Micro Control Unit, micro-control unit) be the master chip of Set Top Box.MCU is connected with STM32 by USB interface, and the first communication interface of STM32 is connected with the first deck, and the second communication interface of STM32 is connected with the second deck.
On the one hand, utilize USB interface to replace GPIO(General Purpose Input and Output, universal input output) mouth, the communication speed of USB2.0 is up to 480M/s, for the communication speed of the about 4M/s of GPIO, USB interface has improved the communication speed between STM32 chip and master chip greatly, thereby has improved the speed of service of set-top-box system.In addition, utilize USB interface to carry out the transfer of data between STM32 chip and master chip, only need to take 2 I/O mouths of master chip, for TDA8024 need to take at least 10 I/O mouths of master chip, utilize USB interface to carry out the usage quantity that transfer of data between STM32 chip and master chip has greatly reduced master chip I/O mouth, improved the service efficiency of master chip I/O mouth.
On the other hand, adopt STM32 chip, substantially do not need peripheral circuit, for TDA8024 chip needs a large amount of peripheral components, the area that adopts STM32 chip to take PCB greatly reduces, and is about and uses 1/4th of TDA8024 chip.
The embodiment of the present invention is by when Set Top Box starts, using the entry condition of the not destroyed main program as Set Top Box of STM32 chip judgement loader utility, again by STM32 chip by the data retransmission of smart card the master chip to Set Top Box, thereby greatly reduced the usage quantity of the usable floor area of PCB and the I/O mouth of Set Top Box master chip, and greatly improved the communications security of Set Top Box.
Fig. 4 shows the structured flowchart of the Set Top Box that the embodiment of the present invention provides, and this Set Top Box, for the Realization Method of Communication of the Set Top Box described in service chart 1 to 2, for convenience of explanation, only shows the part relevant to the present embodiment.With reference to Fig. 4:
This Set Top Box comprises:
Loader detection module 41, when described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection.
Main program starts module 42, if described STM32 chip judges that described loader utility is not destroyed, starts the main program of described Set Top Box.
Smart card recognition module 43, when the deck of described Set Top Box has detected smart card insertion, notifies described STM32 chip.
Data forwarding module 44, described STM32 chip sends to the data of described smart card the master chip of described Set Top Box.
Further, described Loader detection module 41 comprises:
Auxiliary code and check code comparison sub-module, when described Set Top Box starts, compare the auxiliary code of described loader utility generation in service with the check code of pre-stored in described STM32 chip.
Do not destroy decision sub-module, if described auxiliary code is consistent with described check code, described STM32 chip judges that described loader utility is not destroyed.
Destroy decision sub-module, if described auxiliary code and described check code are inconsistent, described STM32 chip judges that described loader utility is destroyed.
Further, described Set Top Box also comprises:
Main program No starting module, if described STM32 chip judges that described loader utility is destroyed, does not allow to start the main program of described Set Top Box.
Preferably, described Set Top Box comprises 2 described decks;
The serial peripheral equipment interface SPI of described STM32 chip is connected one by one with described deck.
Preferably, described data forwarding module 44 specifically for:
Described STM32 chip is converted to the data of described smart card after the data that meet general-purpose serial bus USB agreement, then is forwarded to the master chip of described Set Top Box.
The embodiment of the present invention is by when Set Top Box starts, using the entry condition of the not destroyed main program as Set Top Box of STM32 chip judgement loader utility, again by STM32 chip by the data retransmission of smart card the master chip to Set Top Box, thereby greatly reduced the usage quantity of the usable floor area of PCB and the I/O mouth of Set Top Box master chip, and greatly improved the communications security of Set Top Box.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a Realization Method of Communication for Set Top Box, is characterized in that, comprising:
When described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection;
If described STM32 chip judges that described loader utility is not destroyed, start the main program of described Set Top Box;
When the deck of described Set Top Box has detected smart card insertion, notify described STM32 chip;
Described STM32 chip sends to the data of described smart card the master chip of described Set Top Box.
2. the method for claim 1, is characterized in that, described when described Set Top Box starts, and described Set Top Box is by whether destroyed the comprising of loader utility of Set Top Box described in STM32 chip detection:
When described Set Top Box starts, the auxiliary code of described loader utility generation in service is compared with the check code of pre-stored in described STM32 chip;
If described auxiliary code is consistent with described check code, described STM32 chip judges that described loader utility is not destroyed;
If described auxiliary code and described check code are inconsistent, described STM32 chip judges that described loader utility is destroyed.
3. method as claimed in claim 2, is characterized in that, described method also comprises:
If described STM32 chip judges that described loader utility is destroyed, do not allow to start the main program of described Set Top Box.
4. the method for claim 1, is characterized in that, described Set Top Box comprises 2 described decks;
The serial peripheral equipment interface SPI of described STM32 chip is connected one by one with described deck.
5. the method as described in claim 1 to 4 any one, is characterized in that, described STM32 chip sends to the master chip of described Set Top Box to comprise the data of described smart card:
Described STM32 chip is converted to the data of described smart card after the data that meet general-purpose serial bus USB agreement, then is forwarded to the master chip of described Set Top Box.
6. a Set Top Box, is characterized in that, comprising:
Loader detection module, for when described Set Top Box starts, whether described Set Top Box is destroyed by the loader utility of Set Top Box described in STM32 chip detection;
Main program starts module, if judge that for described STM32 chip described loader utility is not destroyed, starts the main program of described Set Top Box;
Smart card recognition module, while smart card insertion having been detected for the deck when described Set Top Box, notifies described STM32 chip;
Data forwarding module, sends to the data of described smart card the master chip of described Set Top Box for described STM32 chip.
7. Set Top Box as claimed in claim 6, is characterized in that, described Loader detection module comprises:
Auxiliary code and check code comparison sub-module, for when described Set Top Box starts, compare the auxiliary code of described loader utility generation in service with the check code of pre-stored in described STM32 chip;
Do not destroy decision sub-module, if consistent with described check code for described auxiliary code, described STM32 chip judges that described loader utility is not destroyed;
Destroy decision sub-module, if inconsistent for described auxiliary code and described check code, described STM32 chip judges that described loader utility is destroyed.
8. Set Top Box as claimed in claim 7, is characterized in that, described Set Top Box also comprises:
Main program No starting module, if judge that for described STM32 chip described loader utility is destroyed, does not allow to start the main program of described Set Top Box.
9. Set Top Box as claimed in claim 6, is characterized in that, described Set Top Box comprises 2 described decks;
The serial peripheral equipment interface SPI of described STM32 chip is connected one by one with described deck.
10. the Set Top Box as described in claim 6 to 9 any one, is characterized in that, described data forwarding module specifically for:
Described STM32 chip is converted to the data of described smart card after the data that meet general-purpose serial bus USB agreement, then is forwarded to the master chip of described Set Top Box.
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| CN201410123243.4A CN103929675B (en) | 2014-03-28 | 2014-03-28 | A kind of Realization Method of Communication and set-top box of set-top box |
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| CN201410123243.4A CN103929675B (en) | 2014-03-28 | 2014-03-28 | A kind of Realization Method of Communication and set-top box of set-top box |
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