CN101853181A - Subprogram mutual calling method used in embedded system - Google Patents
Subprogram mutual calling method used in embedded system Download PDFInfo
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- CN101853181A CN101853181A CN 201010170472 CN201010170472A CN101853181A CN 101853181 A CN101853181 A CN 101853181A CN 201010170472 CN201010170472 CN 201010170472 CN 201010170472 A CN201010170472 A CN 201010170472A CN 101853181 A CN101853181 A CN 101853181A
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Abstract
The invention discloses a subprogram mutual calling method used in an embedded system, which comprises the following steps of: step one, when the embedded system is started for operation, setting an initial environment, checking an initial mark, and determining a subprogram to be called; step two, starting operating the subprogram, clearing a reset mark and setting an independent subprogram operating environment first, and then entering a subprogram main body; and step three, when another subprogram is needed to be called, repeating the step two. The subprogram mutual calling method has the advantages that: 1) each subprogram can use almost all RAM; 2) the interrelation among the subprograms are isolated to the utmost extent; and 3) each subprogram can acquire an independent operating environment.
Description
Technical field
The invention belongs to the robot calculator field, relate to a kind of method that is used for the Subprogram mutual calling of embedded system.
Background technology
Embedded system says to be exactly computer system in a broad sense, and it comprises except with general being all computing machines the computing machine of purpose.Can to satisfy multiple-task different with general-purpose computing system, and embedded system can only be finished the task of some specific purpose.Part is called as firmware for the embedded system written program, and they are stored in ROM (read-only memory) or the flash chip, and they operate in the computer hardware of resource-constrained.Return address when the overall situation/local variable that the subroutine in the embedded system is used when operation and subroutine call all takies ram space, level increase along with nesting allocation, the ram space that takies is also big more, and ram space is very limited in the embedded system.In addition, the bug of a subroutine is easy to have influence on other subroutines.
In some single-chip microcomputer, after powering on, some function registers can only write once, when using these registers, must integrated planning, thus reduced the dirigibility of program.
Summary of the invention
Technical matters to be solved by this invention is: the contact between a kind of program of separaant to greatest extent is provided, thoroughly discharge the resource that previous runtime subroutine takies, and the resetting sub program is to the method for the Subprogram mutual calling that is used for embedded system of the modification of running environment.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of method that is used for the Subprogram mutual calling of embedded system may further comprise the steps:
Step 1 when embedded system starts operation, is provided with initial environment, checks initial mark, which subroutine that decision is called;
Step 2, subroutine brings into operation: remove reseting mark, independently subprogram activation environment is set, enter the subroutine main body then;
Step 3 when needs call another subroutine, is provided with reseting mark and call parameters, restarts CPU, thus the step 1 of changing over to.
As a preferred embodiment of the present invention, described independently subprogram activation environment is realized by restarting CPU.
As another kind of preferred version of the present invention, described CPU restarts by hard reset rather than warm reset, and described hard reset comprises house dog or reset signal are set; Described warm reset comprises article one instruction operation of carrying out when leaping to CPU powers on.
As another preferred version of the present invention, by being set, house dog restarts a kind of method to set up of CPU, and the subprogram activation environment of setting has: A1, house dog is set; A2, interrupt vector is set; A3, timer is set.
As another preferred version of the present invention, restart a kind of method to set up of CPU by hard reset, being operating as of call subroutine:
B1, close interrupt source, shielding is interrupted;
B2, reseting mark is set is eigenwert, and the entry address that subroutine address is masked as subroutine is set; Setting passes to the parameter of subroutine;
B3, stop the house dog that resets, wait for watchdog reset CPU, thus runtime subroutine.
As another preferred version of the present invention, in the step 1, the described initial environment that is provided with comprises and initial storehouse is set, the zero clearing interrupt vector table.
As another preferred version of the present invention, in the step 1, described inspection initial mark comprises the inspection reseting mark, and the subroutine address sign.
Beneficial effect of the present invention is:
1) each subroutine all can be used most RAM;
2) behind the hard reset, the register of write once can be write again;
3) isolated the interference of subroutine bug to greatest extent to other subroutine;
4) each subroutine all can obtain independently running environment.
Description of drawings
Fig. 1 is the synoptic diagram of subroutine call method;
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Embodiment
Present embodiment provides a kind of method that is used for the Subprogram mutual calling of embedded system, and this method may further comprise the steps:
A kind of method that is used for the Subprogram mutual calling of embedded system may further comprise the steps:
Step 1 when embedded system starts operation, is provided with initial environment, checks initial mark, and which subroutine decision calls; The described initial environment that is provided with comprises and initial storehouse is set, the zero clearing interrupt vector table; Described inspection initial mark comprises the inspection reseting mark, and the subroutine address sign; Initial mark can be placed in RAM or the External memory equipment, and also available I/O indicates.
Step 2, the subroutine that brings into operation is at first removed reseting mark, and independently subprogram activation environment is set, and enters the subroutine main body then; Described independently subprogram activation environment is realized by hard reset CPU; Described hard reset CPU is by being provided with house dog or reset signal restarts;
The subprogram activation environment that is provided with has:
A1, house dog is set;
A2, low-voltage detecting is set;
A3, battery saving mode is set;
A4, clock generator is set;
A5, interrupt vector is set;
A6, timer is set.
Step 3 when needs call another subroutine, is operating as:
B1, close interrupt source, shielding is interrupted;
B2, reseting mark is set is eigenwert, and the entry address that subroutine address is masked as subroutine is set, and the parameter that passes to subroutine is set;
B3, stop the house dog that resets, wait for watchdog reset CPU, enter step 1.
The method of the invention is by checking reseting mark and subroutine address sign, and which subroutine decision calls.Each subroutine includes independently subprogram activation environment and subroutine main body two parts is set; The flow process of the method for Subprogram mutual calling of the present invention as shown in Figure 1.As can be seen from Figure 1, subroutine call method of the present invention can make the register of the back write once that resets that the running environment of each subroutine initialization completely oneself can be set again.Have only between the subroutine outside a small amount of sign and the parameter transmission, do not have other contacts, hardware all reinitializes, and has realized maximum isolation, avoids the phase mutual interference, has also isolated the interference of bug certainly.Whole RAM that each subroutine is almost used have utilized resource to greatest extent.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or essential characteristic, and the present invention can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (4)
1. a method that is used for the Subprogram mutual calling of embedded system is characterized in that, may further comprise the steps:
Step 1 when embedded system starts operation, is provided with initial environment, checks initial mark, which subroutine that decision is called;
Step 2, subroutine brings into operation: remove reseting mark, independently subprogram activation environment is set, enter the subroutine main body then;
Step 3 when needs call another subroutine, is provided with reseting mark and call parameters, restarts CPU, thus the step 1 of changing over to.
2. the method that is used for the Subprogram mutual calling of embedded system according to claim 1 is characterized in that: described independently subprogram activation environment is realized by restarting CPU.
3. the method that is used for the Subprogram mutual calling of embedded system according to claim 2 is characterized in that: described CPU restarts by hard reset rather than warm reset, and described hard reset comprises house dog or reset signal are set; Described warm reset comprises article one instruction operation of carrying out when leaping to CPU powers on.
4, the method that is used for the Subprogram mutual calling of embedded system according to claim 3 is characterized in that: during execution in step three, the step by the hard reset call subroutine is:
B1, stop response and interrupt;
B2, reseting mark is set is eigenwert, preserves the entry address of subroutine in the subroutine address sign; Setting passes to the parameter of subroutine;
B3, hard reset restart CPU.
5. according to any described method that is used for the Subprogram mutual calling of embedded system of claim 1 to 4, it is characterized in that: in the step 1, described inspection initial mark comprises the inspection reseting mark, and the subroutine address sign.
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| CN 201010170472 CN101853181A (en) | 2010-05-11 | 2010-05-11 | Subprogram mutual calling method used in embedded system |
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| CN 201010170472 CN101853181A (en) | 2010-05-11 | 2010-05-11 | Subprogram mutual calling method used in embedded system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708001A (en) * | 2012-04-26 | 2012-10-03 | 深圳市九思泰达技术有限公司 | Linux embedded equipment and switching method between user mode and engineering mode |
| CN103257960A (en) * | 2012-02-15 | 2013-08-21 | 深圳市金蝶友商电子商务服务有限公司 | Calling method and system |
| CN108732967A (en) * | 2018-05-17 | 2018-11-02 | 广东美的制冷设备有限公司 | Anti- electromagnetic interference method, anti-breaking photoelectric control box, air conditioner and medium |
| CN110046000A (en) * | 2019-04-24 | 2019-07-23 | 上海连尚网络科技有限公司 | Small routine operation method and device |
| CN112860333A (en) * | 2019-11-27 | 2021-05-28 | 青岛海尔洗衣机有限公司 | Program operation method and device of control device and clothes treatment equipment |
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| US20040078547A1 (en) * | 2000-11-13 | 2004-04-22 | Vincent David | Security method making deterministic real time execution of multitask applications of control and command type with error confinement |
| CN101364208A (en) * | 2008-09-12 | 2009-02-11 | 浪潮齐鲁软件产业有限公司 | Method for implementing multiprogram switching by CPLD in embedded system |
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Patent Citations (3)
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| US20040078547A1 (en) * | 2000-11-13 | 2004-04-22 | Vincent David | Security method making deterministic real time execution of multitask applications of control and command type with error confinement |
| CN1490722A (en) * | 2003-09-19 | 2004-04-21 | 清华大学 | Graded task switching method based on PowerPC processor structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257960A (en) * | 2012-02-15 | 2013-08-21 | 深圳市金蝶友商电子商务服务有限公司 | Calling method and system |
| CN102708001A (en) * | 2012-04-26 | 2012-10-03 | 深圳市九思泰达技术有限公司 | Linux embedded equipment and switching method between user mode and engineering mode |
| CN102708001B (en) * | 2012-04-26 | 2016-01-06 | 深圳市九思泰达技术有限公司 | The method that Linux embedded device and user model thereof and engineering mode switch |
| CN108732967A (en) * | 2018-05-17 | 2018-11-02 | 广东美的制冷设备有限公司 | Anti- electromagnetic interference method, anti-breaking photoelectric control box, air conditioner and medium |
| CN110046000A (en) * | 2019-04-24 | 2019-07-23 | 上海连尚网络科技有限公司 | Small routine operation method and device |
| CN110046000B (en) * | 2019-04-24 | 2022-03-11 | 上海连尚网络科技有限公司 | Applet running method and device |
| CN112860333A (en) * | 2019-11-27 | 2021-05-28 | 青岛海尔洗衣机有限公司 | Program operation method and device of control device and clothes treatment equipment |
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Application publication date: 20101006 |