CN102122272B - Method and device for controlling extended serial port - Google Patents
Method and device for controlling extended serial port Download PDFInfo
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- CN102122272B CN102122272B CN201110047639A CN201110047639A CN102122272B CN 102122272 B CN102122272 B CN 102122272B CN 201110047639 A CN201110047639 A CN 201110047639A CN 201110047639 A CN201110047639 A CN 201110047639A CN 102122272 B CN102122272 B CN 102122272B
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Abstract
The invention discloses a method for controlling an extended serial port. The method is used for realizing effective transmission of data. The method comprises the following steps: a main chip sends an enable command to an extended serial port chip to instruct the extended serial port chip to enter into the GPIO (general purpose input/output) mode and output high level; the main chip downloads firmware on the extended serial port chip; and after completing downloading, the main chip sends a switching command to the extended serial port chip to instruct the extended serial port chip to enter into the UART_RTS (universal asynchronous receiver-transmitter request to send) mode and output low level. The invention also discloses a device for realizing the method.
Description
Technical field
The present invention relates to built-in field, particularly relate to the method and the device of control expansion serial ports.
Background technology
Along with greatly enriching of CDMA (CDMA access) cell phone software function; The demand of carrying out serial communication with peripheral chip is increasing; The original serial ports quantity of CDMA master chip can't satisfy the demand of mobile phone; In this case, the demand of CDMA increase serial ports quantity has been satisfied in the generation of expansion serial ports greatly.
In order to reduce cost, the expansion serial ports uses software mode to realize serial port protocol, and this mode needs the CDMA end to download the firmware of expansion serial ports before each serial communication.At present, adopt UART_RTS (universal asynchronous receiver-transmitter request to send, universal asynchronous reception-dispensing device _ transmission request) pattern between expansion serial port chip and the serial communication modular.When needs communicated, the expansion serial port chip dragged down the current potential of RTS pin, just begins to receive data.Because firmware is bigger, often firmware also not have to download the finish module of communication with it and has just sent data, is in the UART_RTS pattern and can't normally receives data though expand serial port chip at this moment, causes loss of data.
Summary of the invention
The embodiment of the invention provides a kind of method and device of controlling the expansion serial ports, is used to realize effective transmission of data.
A kind of method of controlling the expansion serial ports may further comprise the steps:
Master chip sends to the expansion serial port chip and launches order, indicates expansion serial port chip entering GPIO pattern and exports high level through the RTS pin;
Master chip arrives the expansion serial port chip with firmware downloads;
After download finished, master chip sent switching command to expanding serial port chip, and indication expansion serial port chip gets into the UART_RTS pattern also through said RTS pin output low level.
A kind of disposal route of expanding serial ports may further comprise the steps:
The expansion serial port chip receives the order of launching of master chip transmission, gets into the GPIO pattern also through RTS pin output high level;
The expansion serial port chip is from the master chip download firmware;
After download finished, the expansion serial port chip received the switching command that master chip sends, and got into the UART_RTS pattern also through said RTS pin output low level.
A kind of master chip comprises:
Interface module is used for launching order to the transmission of expansion serial port chip, and indication expansion serial port chip gets into the GPIO pattern and passes through RTS pin output high level;
Control module; Be used for firmware downloads being arrived the expansion serial port chip through interface module; And the indication interface module to expanding serial port chip transmission switching command, indicates the expansion serial port chip to get into the UART_RTS pattern also through said RTS pin output low level after download finishes.
A kind of expansion serial port chip comprises:
Interface module is used to receive the order of launching of master chip transmission;
Control module is used for getting into the GPIO pattern and indicating interface module to pass through RTS pin output high level after launching order receiving;
Said interface module is from the master chip download firmware;
After download finished, said interface module received the switching command that master chip sends;
Said control module gets into UA RT_RTS pattern and indicates interface module through said RTS pin output low level after receiving switching command.
The embodiment of the invention increases the GPIO pattern for the expansion serial port chip; Make the expansion serial port chip launch the back and get into the GPIO pattern; And under the GPIO pattern download firmware; Because expand serial port chip and be not in the UART_RTS pattern this moment, therefore can not communicate by letter with serial communication modular, also just there is not the problem of obliterated data.
Description of drawings
Fig. 1 is the main method process flow diagram of control expansion serial ports in the embodiment of the invention;
Fig. 2 is the main methods process flow diagram of expansion serial ports in the embodiment of the invention;
Fig. 3 is the detailed method process flow diagram of control expansion serial ports in the embodiment of the invention;
Fig. 4 is the method flow diagram of firmware handle in the embodiment of the invention;
Fig. 5 controls the method flow diagram of expanding serial port chip in conjunction with task scheduling in the embodiment of the invention;
Fig. 6 is the structural drawing of embedded system in the embodiment of the invention;
Fig. 7 is the structural drawing of master chip in the embodiment of the invention;
Fig. 8 is the structural drawing of expansion serial port chip in the embodiment of the invention.
Embodiment
The embodiment of the invention increases GPIO (general input/output port) pattern for the expansion serial port chip; Make the expansion serial port chip launch the back and get into the GPIO pattern; And under the GPIO pattern download firmware; Because expand serial port chip and be not in the UART_RTS pattern this moment, therefore can not communicate by letter with serial communication modular, also just there is not the problem of obliterated data.
Referring to Fig. 1, the main method flow process of control expansion serial ports is following in the present embodiment:
Step 101: master chip sends to the expansion serial port chip and launches order, and indication expansion serial port chip gets into the GPIO pattern and exports high level.
Step 102: master chip arrives the expansion serial port chip with firmware downloads.
Step 103: after download finished, master chip sent switching command to the expansion serial port chip, and indication expansion serial port chip gets into UART_RTS pattern and output low level.
Present embodiment has been realized the control of master chip to the expansion serial port chip, and is relative with this process, and the expansion serial port chip need be accepted the control of master chip.Referring to Fig. 2, the main methods flow process of expansion serial ports is following in the present embodiment:
Step 201: the expansion serial port chip receives the order of launching of master chip transmission, gets into the GPIO pattern and also exports high level.
Step 202: the expansion serial port chip is from the master chip download firmware.
Step 203: the expansion serial port chip receives the switching command that master chip sends, and gets into UART_RTS pattern and output low level.
Referring to Fig. 3, the detailed method flow process of control expansion serial ports is following in the present embodiment:
Step 301: master chip sends to the expansion serial port chip and launches order.
Step 302: the expansion serial port chip gets into the GPIO pattern based on launching order, and sends high level signal through the RTS pin to serial communication modular.High level signal is the working signal of GPIO pattern in the present embodiment.Serial communication modular is used to realize the communication between a plurality of chips, like communicating by letter between CDMA master chip and the GSM master chip.In the whole process, serial communication modular is under the UART pattern all the time.The UART_CTS pin of serial communication modular links to each other with the UART_RTS pin of expansion serial port chip, is expanded serial port chip UART_RTS pin always and controls.When serial communication modular when to detect the UART_CTS pin be high, postpone the transmission of serial data, when serial communication modular detects the UART_CTS pin when low, continue the transmission of serial data.
Step 303: master chip arrives the expansion serial port chip with firmware downloads.
Step 304: after download finished, master chip sent switching command to the expansion serial port chip.
Step 305: the expansion serial port chip gets into the UART_RTS pattern according to switching command, and passes through the RTS pin to serial communication modular output low level signal.Low level signal is the working signal of UART_RTS pattern in the present embodiment.
Step 306: master chip communicates through expansion serial port chip and serial communication modular.
Behind the sign off, the step below continuing.
Step 307: master chip sends switching command to the expansion serial port chip.
Step 308: the expansion serial port chip gets into the GPIO pattern according to switching command, and sends high level signal through the RTS pin to serial communication modular.
Master chip needs download firmware to arrive the expansion serial port chip before calling task, after task termination, needs the firmware of unloading expansion serial port chip.In multitask system; TX (emission) pin, RX (reception) pin and interruption (INT) pin might be called by various tasks; These three kinds of operations all can cause the download and the unloading of firmware; Unloaded firmware if a task is being downloaded in the expansion serial ports firmware process by another task, this moment, serial communication will occur unusually.Be head it off, present embodiment provides a kind of method of firmware handle, and referring to shown in Figure 4, the method flow of firmware handle is following:
Step 401: master chip need to confirm the task of invoke extensions serial port chip.
Step 402: master chip judges whether that download firmware is to the expansion serial port chip, if then continue step 404, otherwise continue step 403.Master chip can be with the variable uart_count of office as totalizer in the present embodiment.Whenever call a task, uart_count is added 1.Only need to judge whether uart_count is 0 this moment, if then continue step 403, otherwise continue step 404.
Step 403: the master chip download firmware is to the expansion serial port chip.
Step 404: the task of master chip invoke extensions serial port chip.Calling of task comprises TX task, RX task and interrupt task.When master chip calls interrupt task, can also start Abort Timer, when Abort Timer is overtime, confirm that interrupt task finishes.For example, the duration of Abort Timer is 100ms.
Step 405: master chip updating task totalizer.
Step 406: master chip is executed the task through the expansion serial port chip.
Step 407: during task termination, master chip updating task totalizer.Task of every end subtracts 1 with uart_count.So just can avoid at the task serial communication abnormal problem that also another task causes owing to the unloading firmware of oneself finishing using when using the expansion serial port function.
Step 408: master chip judges whether still if having, then to continue step 406 in carrying out of task, otherwise continues step 409.Because task of every end subtracts 1 with uart_count.So whether master chip only need be judged uart_count is 0, if then continue step 409, otherwise continue step 406.
Step 409: the firmware on the master chip unloading expansion serial port chip.
The processing of firmware also is the control to the expansion serial port chip; Below in conjunction with task scheduling and firmware handle; Come to introduce control procedure in detail,, combine the method flow of task scheduling control expansion serial port chip following in the present embodiment referring to shown in Figure 5 to the expansion serial port chip:
Step 501: master chip sends to the expansion serial port chip and launches order.
Step 502: the expansion serial port chip gets into the GPIO pattern based on launching order, and sends high level signal through the RTS pin to serial communication modular.
Step 503: master chip judges whether that download firmware is to the expansion serial port chip, if then continue step 505, otherwise continue step 504.
Step 504: master chip arrives the expansion serial port chip with firmware downloads.
Step 505: after download finished, master chip sent switching command to the expansion serial port chip.
Step 506: the expansion serial port chip gets into the UART_RTS pattern according to switching command, and passes through the RTS pin to serial communication modular output low level signal.
Step 507: the task of master chip invoke extensions serial port chip, and updating task totalizer.
Step 508: during task termination, master chip updating task totalizer.
Step 509: master chip judges whether still, then to continue to execute the task if having in carrying out of task, continues step 508 then, otherwise continues step 510.
Step 510: master chip sends switching command to the expansion serial port chip.
Step 511: the expansion serial port chip gets into the GPIO pattern according to switching command, and sends high level signal through the RTS pin to serial communication modular.
Step 512: the firmware on the master chip unloading expansion serial port chip.
More than described the implementation procedure of control expansion serial port chip, this process relates to master chip, expansion serial port chip and serial communication modular.Above-mentioned three modules constitute an embedded system, referring to shown in Figure 6.EBI on the interface of master chip (external bus interface) pin is connected with the expansion serial port chip, and the INT pin is connected with serial communication modular.The expansion serial port chip interface on RTS pin, TX pin and RX pin respectively with serial communication modular on CTS (clear to send, clear to send) pin, RX pin be connected with the TX pin.Introduce in the face of master chip and the inner structure and the function of expansion serial port chip down.
Referring to Fig. 7, master chip comprises in the present embodiment: interface module 701 and control module 702.
Interface module 701 is used for launching order to the transmission of expansion serial port chip, and indication expansion serial port chip gets into the GPIO pattern and also exports high level.
Control module 702 is used for through interface module firmware downloads being arrived the expansion serial port chip, and the indication interface module to expansion serial port chip transmission switching command, indicates the expansion serial port chip to get into UART_RTS pattern and output low level after download finishes.Control module 702 also is used to indicate interface module after the expansion serial port chip is sent switching command, calling task.Control module 702 also is used for when calling interrupt task, starts the Abort Timer in the master chip, when Abort Timer is overtime, confirms that interrupt task finishes.Control module 702 also is used for when task termination, judges whether still in carrying out of task, if do not have, then indicates interface module to send switching command to the expansion serial port chip, and indication expansion serial port chip gets into the GPIO pattern and also exports high level.
Referring to Fig. 8, the expansion serial port chip comprises in the present embodiment:
The embodiment of the invention increases the GPIO pattern for the expansion serial port chip; Make the expansion serial port chip launch the back and get into the GPIO pattern; And under the GPIO pattern download firmware; Because expand serial port chip and be not in the UART_RTS pattern this moment, therefore can not communicate by letter with serial communication modular, also just there is not the problem of obliterated data.The embodiment of the invention has also been carried out whether having still the judgement in carrying out of task before the firmware in unloading, so as not to a task also when using the expansion serial port function another task because the serial communication that the unloading firmware of oneself finishing using causes is unusual.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the process flow diagram and/or the block scheme of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block scheme and/or square frame and process flow diagram and/or the block scheme and/or the combination of square frame.Can provide these computer program instructions to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computing machine or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame appointments.
These computer program instructions also can be stored in ability vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work; Make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
These computer program instructions also can be loaded on computing machine or other programmable data processing device; Make on computing machine or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of on computing machine or other programmable devices, carrying out is provided for being implemented in the step of the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. a method of controlling the expansion serial ports is characterized in that, may further comprise the steps:
Master chip sends to the expansion serial port chip and launches order, and indication expansion serial port chip gets into general input/output port GPIO pattern also through sending request RTS pin output high level;
Master chip arrives the expansion serial port chip with firmware downloads;
After download finished, master chip sent switching command to expanding serial port chip, and indication expansion serial port chip gets into universal asynchronous reception-dispensing device _ transmission request UART_RTS pattern also through said RTS pin output low level.
2. the method for claim 1 is characterized in that, master chip also comprises step: the master chip calling task after the expansion serial port chip is sent switching command.
3. method as claimed in claim 2 is characterized in that, when master chip calls interrupt task, also comprises step: start Abort Timer, when Abort Timer is overtime, confirm that interrupt task finishes.
4. like claim 2 or 3 described methods; It is characterized in that; Also comprise step: master chip judges whether still in carrying out of task, if do not have when a task termination; Then send switching command, indicate expansion serial port chip entering GPIO pattern and export high level through said RTS pin to the expansion serial port chip.
5. a disposal route of expanding serial ports is characterized in that, may further comprise the steps:
The expansion serial port chip receives the order of launching of master chip transmission, gets into the GPIO pattern also through RTS pin output high level;
The expansion serial port chip is from the master chip download firmware;
After download finished, the expansion serial port chip received the switching command that master chip sends, and got into the UART_RTS pattern also through said RTS pin output low level.
6. method as claimed in claim 5; It is characterized in that; Master chip also comprises step through after expanding serial port chip and serial communication modular sign off: the expansion serial port chip receives the switching command that master chip sends, and gets into the GPIO pattern also through said RTS pin output high level.
7. a master chip is characterized in that, comprising:
Interface module is used for launching order to the transmission of expansion serial port chip, and indication expansion serial port chip gets into the GPIO pattern and passes through RTS pin output high level;
Control module; Be used for firmware downloads being arrived the expansion serial port chip through interface module; And the indication interface module to expanding serial port chip transmission switching command, indicates the expansion serial port chip to get into the UART_RTS pattern also through said RTS pin output low level after download finishes.
8. master chip as claimed in claim 7 is characterized in that, control module also is used to indicate interface module after the expansion serial port chip is sent switching command, calling task.
9. master chip as claimed in claim 8 is characterized in that, control module also is used for when calling interrupt task, starts the Abort Timer in the master chip, when Abort Timer is overtime, confirms that interrupt task finishes.
10. like claim 8 or 9 described master chips; It is characterized in that; Control module also is used for when a task termination, judges whether still in carrying out of task, if do not have; Then indicate interface module to send switching command, indicate expansion serial port chip entering GPIO pattern and export high level through said RTS pin to the expansion serial port chip.
11. an expansion serial port chip is characterized in that, comprising:
Interface module is used to receive the order of launching of master chip transmission;
Control module is used for getting into the GPIO pattern and indicating interface module to pass through RTS pin output high level after launching order receiving;
Said interface module is from the master chip download firmware;
After download finished, said interface module received the switching command that master chip sends;
Said control module gets into the UART_RTS pattern and indicates interface module through said RTS pin output low level after receiving switching command.
12. expansion serial port chip as claimed in claim 11 is characterized in that, master chip is through after expanding serial port chip and serial communication modular sign off, and interface module receives the switching command that master chip sends; Control module gets into the GPIO pattern and indicates interface module to pass through RTS pin output high level after receiving switching command once more.
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| CN201110047639A CN102122272B (en) | 2011-02-28 | 2011-02-28 | Method and device for controlling extended serial port |
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| CN201110047639A CN102122272B (en) | 2011-02-28 | 2011-02-28 | Method and device for controlling extended serial port |
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| CN105159859B (en) * | 2015-09-11 | 2017-12-19 | 上海斐讯数据通信技术有限公司 | Data handling system and method based on Interface Expanding |
| CN106023575B (en) * | 2016-06-15 | 2020-12-15 | 瑞斯康微电子（深圳）有限公司 | Communication method and system of II-type collector |
| CN106980517B (en) * | 2017-03-17 | 2020-10-09 | 杭州迪普科技股份有限公司 | Firmware downloading method and device |
| CN112443938A (en) * | 2019-09-04 | 2021-03-05 | 青岛海尔空调电子有限公司 | Indoor unit active detection method for communication miswiring of indoor unit and outdoor unit of air conditioner |
| CN111061515B (en) * | 2019-12-19 | 2022-09-30 | 展讯通信（上海）有限公司 | User equipment starting control method and user equipment |
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| CN1462141A (en) * | 2002-05-30 | 2003-12-17 | 联想(北京)有限公司 | Knee mobile phoe system |
| CN101504565A (en) * | 2009-03-04 | 2009-08-12 | 上海闻泰电子科技有限公司 | Method for awakening chip module |
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| CN101751361B (en) * | 2008-12-16 | 2012-10-10 | 联想(北京)有限公司 | Switchover method for controlling data transmission interface in mobile terminal and terminal equipment |
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| CN1462141A (en) * | 2002-05-30 | 2003-12-17 | 联想(北京)有限公司 | Knee mobile phoe system |
| CN101504565A (en) * | 2009-03-04 | 2009-08-12 | 上海闻泰电子科技有限公司 | Method for awakening chip module |
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Address after: Shandong City, Qingdao Province, Jiangxi City Road No. 11 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Country or region after: China Address before: Shandong City, Qingdao Province, Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. Country or region before: China |
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