CN100471244C

CN100471244C - Circuit working state real-time monitoring method

Info

Publication number: CN100471244C
Application number: CNB2007100484495A
Authority: CN
Inventors: 潘兴超; 江友才; 杨燕; 高宏伟
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2007-02-09
Filing date: 2007-02-09
Publication date: 2009-03-18
Anticipated expiration: 2027-02-09
Also published as: CN101026715A

Abstract

Especially, the invention is related to circuit control technique of TV circuit part. The invention discloses method for real time monitoring and controlling operating state of peripheral IC in TV circuit. When operating state is abnormal, the method closes down electrical source of power supply module. The method includes steps: (1) CPU sets up prearranged value for specific register for peripheral IC; (2) after system operates normally, CPU reads value of the specific register according to prearranged cycle, if the value read out from the specific register is equal to the prearranged value for specific register; then, determining the circuit system is in normal operation condition; otherwise, the circuit system is in abnormal condition, and going to step (3); (3) CPU controls system to enter stand by or closedown state, and displays fault state. The invention prevents complete TV set from operating on abnormal condition so as to raise reliability and service life.

Description

Circuit working state real-time monitoring method

Technical field

The present invention relates to the circuit control technology, particularly the circuit control technology of television circuit part.

Background technology

The core control section of the Circuits System of panel TV is CPU (central processing unit).CPU is responsible for controlling or manage the peripheral integrated circuit that directly links to each other with it, and CPU passes through I ²Peripheral integrated circuit is controlled or managed to C bus or other data communication form.Be to reduce the stand-by power consumption of complete machine, the working power that makes CPU usually and the working power of its peripheral circuit be independence mutually, when complete machine is in holding state, closes the working power of peripheral circuit, only keeps the working power of CPU, makes the CPU can operate as normal.The power-supply system of panel TV changes 220 alternating current the direct current of different magnitudes of voltage into, supplies with CPU and peripheral integrated circuit respectively.When complete machine transfers operating state to by holding state, CPU will reset to peripheral integrated circuit, and the register of peripheral integrated circuit is carried out the initialization setting.

When operate as normal, the value of most of register of each peripheral integrated circuit changes not stopping, but the value of some register is constant, and in these registers, some are arranged is whether flag registers of operate as normal of indication IC (chip) inner each several part function; Some is the value that writes when initialization, and after the initialization, these values can not change, unless IC work is undesired; Also having some is to store the register of data for the peopleware, and it does not participate in the direct control of IC function during operate as normal.

In the process of panel TV operate as normal, occur than great fluctuation process or the continuous high-speed switch power supply of user if be input to 220 volts of alternating voltages of panel TV, cause complete machine power-supply system job insecurity, cause peripheral integrated circuit cisco unity malfunction, system's out-of-control phenomenons such as image, cacophonia will appear in whole set of television, cause the lifetime of system minimizing when serious or cause the fault expanded range.If CPU does not carry out real-time detection and control to the state of peripheral integrated circuit, then complete machine will be in the abnormal work state always.

Summary of the invention

Problem to be solved by this invention is, provides a kind of in television circuit, and to the peripheral Integrated Circuit Working State method of monitoring in real time, when its operating state was unusual, the power supply of powered-down module prevented that fault coverage from further enlarging.

The present invention solves the problems of the technologies described above the technical scheme that is adopted to be, circuit working state real-time monitoring method may further comprise the steps:

A, CPU are provided with preset value to peripheral integrated circuit particular register;

After b, the system's operate as normal, CPU reads the value of above-mentioned particular register by predetermined period, if the value of all particular register of reading is identical with preset value, it is working properly then to be judged as Circuits System; Otherwise it is unusual to be judged as circuit working, enters step c;

C, system control cpu enter standby or off-mode, are shown as malfunction simultaneously.

The constant register of its storing value when described particular register is stored data or system's operate as normal for supplying the peopleware.

The invention has the beneficial effects as follows, CPU adopts circuit working state real-time monitoring method, monitor unusual in the system timely and effectively, and the power supply of powered-down module output in time, avoided complete machine to work long hours in abnormality, improve the reliability of complete machine, prolonged the useful life of complete machine.

Description of drawings

Fig. 1 is the embodiment system block diagram;

Fig. 2 is the embodiment flow chart.

Embodiment

As shown in Figure 1, television circuit comprises CPU, power module, peripheral integrated circuit (IC1, IC2, ICn are monitored peripheral integrated circuit), and power module comprises the first voltage output module and the second voltage output module; Wherein to IC1, IC2, ICn power supply, power to CPU by the second voltage output module by switch for the first voltage output module; CPU comprises control port P1, control port P2, control port P3, reaches a communication port; Control port P1 links to each other with switch, controls the first voltage output module peripheral integrated circuit is powered, and control port P2 links to each other with power module, send the machine open/close signal to power module, control port P3 links to each other with indicator light, and communication port links to each other with each peripheral integrated circuit, passes through I ²Peripheral integrated circuit is controlled or managed to C bus or other data communication form.

Particular register among the IC1 is: register A1, register B1, register C1.Particular register among the IC2 is; Register A2, register B2, register C2.Particular register among the ICn is: register An, register Bn, register Cn.Particular register is the constant register of its storing value when storing the data register of data or system's operate as normal for the peopleware.

By reading the preset value of particular register among IC1, IC2, the ICn, judge that whether register value is that preset value comes the decision circuitry system whether normal, as undesired output with regard to the power module in the shut-off circuit system, and is shown as malfunction.

CPU is to the flow process of the monitoring of the operating state of IC1, IC2, ICn as shown in Figure 2:

When whole set of television transferred operating state to by holding state, control port P1, P2, the P3 of CPU were set to 0 respectively;

Behind predetermined delay cycle, CPU begins peripheral integrated circuit (IC) 1, IC2, ICn are carried out the initialization setting.After the initialization setting is finished, if register A1 stores the register of data for the peopleware among the IC1, then write preset value x1 to register A1, the value of the A1 register that preset value x1 reads during with this integrated circuit abnormal work is different; If register B1 and register C1 are that the constant register of its storing value then writes preset value y1 to register B1 during the IC1 operate as normal, writes preset value z1 to register C1.

Same, write preset value x2 to register A2, write preset value y2 to register B2, write preset value y3 to register B3; Write preset value xn to register An, write preset value yn, write preset value yn to register Bn to register Bn; System enters the circuit working state real-time monitoring process afterwards.

The circuit working state real-time monitoring process is as follows: the value a1 of readout register A1; The value b1 of readout register B1; The value c1 of readout register C1.

After reading the value of above-mentioned register, they are judged, if a1=x1 and b1=y1 and c1=z1, IC1 circuit operate as normal then, otherwise the IC1 circuit working is unusual.

Judge whether operation irregularity of IC2, ICn circuit with same method.

If it is unusual to judge the arbitrary circuit working of IC1, IC2 or ICn, then control port P1, control port P2, the control port P3 with CPU is set to 1 respectively, be that control switch cuts out the power supply of the first voltage output module to peripheral integrated circuit, make indicator light be shown as malfunction, sending off signal to power module makes system enter standby or off-mode, as enter off-mode and then close the first voltage output module and the second voltage output module simultaneously, as enter holding state and then close the first voltage output module and get final product.Reading or writing all of above-mentioned register realized by bus or other data communication modes.

Claims

1, circuit working state real-time monitoring method is characterized in that, may further comprise the steps:

A, CPU are provided with preset value to the particular register of peripheral integrated circuit;

After b, the system's operate as normal, cpu cycle is read the value of particular register, if the value of all particular register of reading is identical with preset value, it is working properly then to be judged as Circuits System; Otherwise it is unusual to be judged as circuit working, enters step c;

Described particular register is the constant register of its storing value when storing the register of data or system's operate as normal for the peopleware.

2, circuit working state real-time monitoring method according to claim 1 is characterized in that, the register value that described preset value is read during with abnormal work is different.