CN1635476A

CN1635476A - Loading interrupt service method

Info

Publication number: CN1635476A
Application number: CN 200310113044
Authority: CN
Inventors: 刘权辉
Original assignee: Kinpo Electronics Inc
Current assignee: Kinpo Electronics Inc
Priority date: 2003-12-25
Filing date: 2003-12-25
Publication date: 2005-07-06

Abstract

This invention relates to a hanging interval service method, which comprises the following steps: first registering at least one interval affair relative to one interval source and plugging one function order into the calling order in the interval service program of interval source; executing the service program pointed by the all function order of the interval program when there is interval; anti-registering the interval affair when not needing the service program and removing the function orders from the interval service program calling orders.

Description

Carry the break in service method of hanging

Technical field

The invention relates to a kind of break in service method, refer in particular to a kind of extension break in service method of carrying that is applicable to embedded system.

Background technology

In the design of embedded system, normally provide system required function with a single-chip, and in the framework of this single-chip, generally provide the mechanism of interruption (Interrupt), with when in system, having specific incident to take place, single-chip will stop present processing and carry out the pairing interrupt service routine of interrupt event (Interrupt Service Routine, ISR), to serve this interruption, so, system can control the formula that single-wafer processing need be handled at present at reasonable time, so that effectively use the hardware resource.

Fig. 1 shows the Organization Chart of interrupt mechanism, wherein, 12 planning of interruptable controller have the pairing interrupt vector of each interrupt source, when interrupt source 11 is sent an interruption, system will carry out interrupt vector interrupt service routine pointed, yet, in the design of single-chip, one interrupt source 11 is sent when interrupting, still need and look the condition that interrupt to take place (time of Fa Shenging for example, the reason that takes place etc.) distinguish out different interrupt events, and different service routine in the execution interrupt service routine, therefore in the time of will carrying out interrupt service routine interrupting taking place, because judge needs to carry out which service routine, so must use global variable (global variable) to write down the interrupt event that interrupt source produces, so could correctly carry out interrupt service routine.

From the above, known interrupt mechanism need use global variable and will judge that therefore, efficient is not good with the service routine that will carry out of decision, and service routine determined when compiling, can't change when carrying out, also lack flexibility.Therefore, how can avoid aforesaid disappearance and provide one effectively and the flexible interrupt mechanism of tool, become a problem that needs to be resolved hurrily then.

Summary of the invention

The objective of the invention is is providing a kind of year extension break in service method, dynamically real estate is given birth to required interruption, and can not carry out unnecessary judgement fully in the time need not interrupting, and saves unnecessary global variable, and service routine can upgrade after compiling again, and can simplify the maintenance that comes source code.

For reaching above-mentioned purpose, a kind of year of providing of the present invention hangs the break in service method, comprises step:

(A) registration is inserted a functional parameter corresponding at least one interrupt event of an interrupt source with the call instruction in the interrupt service routine of this interrupt source, and this functional parameter points to the service routine of a correspondence;

(B) when this interrupt source produces interruption, all functions index service routine pointed in the call instruction of execution interrupt service routine;

(C) instead register at least one registered interrupt event, remove the functional parameter of this interrupt event in the call instruction with this interrupt service routine certainly.

Hung the break in service method in described year, wherein in step (A), interrupt event is with log-in command REG, the fp registration, in step (C), interrupt event is with anti-log-in command UNREG, fp removes, and wherein, fp is the functional parameter of the service routine of corresponding this desire registration interruption of a sensing.

Hung the break in service method in described year, wherein when a plurality of interrupt events were registered, the functional parameter of these a plurality of interrupt events was with link tandem moor string together, when giving birth to central broken hair, carries out all functions index service routine pointed.

By above explanation as can be known, the present invention dynamically produces required interruption by providing registration and anti-registration to interrupt, in the time need not interrupting, can not carry out unnecessary judgement fully, save unnecessary global variable, and service routine can be after compiling upgrades again, and can simplify the maintenance that comes source code.

Description of drawings

Fig. 1 is known interrupt mechanism synoptic diagram;

Fig. 2 is the applied environment figure of of the present invention year extension break in service method;

Fig. 3 shows of the present invention year to hang an example of break in service method.

Embodiment

For allowing your juror can more understand technology contents of the present invention, preferable concrete especially exemplified by one

Embodiment is described as follows.

Hung the break in service method in relevant of the present invention year, please be earlier with reference to applied environment figure shown in Figure 2, wherein, planning has an interrupt source 21 pairing interrupt vectors in the interruptable controller 22, when interrupting to produce in interrupt source 21, start this interrupt vector, wherein, the interruption that this interrupt source 21 produces can be different interrupt events.One registration/anti-accreditation process 23 then is to interrupt or instead register this interruption in order to dynamically to register one.

Interruption registration/anti-log-in command the parameter that aforementioned registration/anti-accreditation process 23 is provided comprises fp, REGCtrl, Mode and interval, and wherein, fp is the functional parameter of the service routine of corresponding this desire registration interruption of a sensing; REGCtrl can insert REG or UNREG represents registration or anti-log-in command; Mode can insert CONTINUOUS or ONE SHOT, with the interruption generation behavior of expression registration for recur or only single take place, if recur, then interval represents the origination interval time, if single takes place, time of origin after interval represents to register.

As shown in the figure, interrupt by using registration and anti-registration timing, dynamically produce required interrupt event, for example, when giving birth to, central broken hair need carry out service routine A, just can log-in command REG, fpA comes to system registry, system will insert the instruction of calling out fpA (call fpA) in the interrupt service routine that interrupt vector is pointed to, wherein, fpA points to service routine A, afterwards, if decision also needs to carry out service routine B when interrupting taking place, can be again with log-in command REG, fpB comes to system registry, this moment is if there be idle the interruption, then be written in idle the interruption, if there be not idle the interruption, the interruption of then getting the interval minimum comes the computing greatest common factor as interval, and fpB will go here and there in the mode of link tandem (link list) in system after calling out fpA, and further calculate performance period of two, and being separated with regional parameter, the cycle for the treatment of takes place then to be carried out.Wherein, fpB points to service routine B, therefore, will carry out service routine A and service routine B when interrupting taking place, and in this way, call instruction can be connected in series many functional parameters, to carry out the pairing service routine of these functional parameters.And if decision has not needed to carry out service routine B when interrupt taking place, then can anti-log-in command UNREG, fpB comes the cancellation service routine B to system, system will remove fpB in the link tandem of call instruction, and upgrade the interval value once more, and the relevant operation that increases or remove functional parameter in the link tandem newly is the technology for the physical data structure, is not described in detail in this.

Fig. 3 shows an example, wherein when t1 with log-in command REG, fpA and REG, fpB comes to system registry, so service routine A and B are carried out in interruption when taking place, when t2 with log-in command REG, fpC and REG, fpD come to system registry, thus execution service routine A, B, C and D when interrupting taking place, when t3 with anti-log-in command UNREG, fpC comes to register to system is counter, so execution service routine A, B and D when interrupting taking place.

The foregoing description only is to give an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.

Claims

1, hang the break in service method in a kind of year, it is characterized in that, comprise step:

2, hung the break in service method in according to claim 1 year, it is characterized in that, wherein in step (A), interrupt event is with log-in command REG, and the fp registration is in step (C), interrupt event is with anti-log-in command UNREG, fp removes, and wherein, fp is the functional parameter of the service routine of corresponding this desire registration interruption of a sensing.

3, hung the break in service method in according to claim 2 year, it is characterized in that wherein when a plurality of interrupt events were registered, the functional parameter of these a plurality of interrupt events was with link tandem moor string together, when giving birth to, carry out all functions index service routine pointed with central broken hair.