TWI448082B - Pulse generator trigger by event - Google Patents

Description

Event triggered pulse wave generation mechanism

The invention relates to an event-triggered pulse wave generation mechanism, and the technical field belongs to the related fields of application of electronic motors, digital signal processing, and applications of embedded systems.

Electronic device systems are often composed of multiple subsystems or circuits, and each subsystem or circuit has its own clock, and its clock is not synchronized; often some instrument systems want to generate a single pulse and its timing is timely. The pulse width must be synchronized with the other clock system to precisely control the event trigger pulse wave generation mechanism, which is the skill of the industrial circuit designer all the time; the Republic of China invention patent I298976 clicks double In the prior art of the polarity waveform generating device and method, the event triggering pulse wave generating mechanism is completed by using logic elements such as NAND and D-FF, as shown in FIG. 1; the above-mentioned different types of discrete digital IC components are combined into an event-triggered pulse wave. The logic circuit design of the generation mechanism has the disadvantages that different types of discrete digital IC components are required, the parts management is troublesome, the time-consuming detection and the occupied circuit space layout are increased and complicated; in order to solve the above problems, the present invention proposes a The algorithm generates an event-triggered pulse generation mechanism on a single-chip microprocessor.

The invention patent proposes an event-triggered pulse wave generation mechanism, which can be integrated into an existing micro-processing control system and can simplify the cost and maintenance management cost of electronic circuit design and related electronic components.

In the system design, there are often single or multiple pulse signals generated by the event triggering method, and the pulse signals generated by the system often need to respond to the system clock, as shown in Figure 2; The clock of the original system, when an event occurs, can produce a positive or negative pulse in the next pulse in the next clock. The most common one is the click-issue bipolar waveform generating device and method of the Republic of China invention patent I298976. Some NAND, D-FF and other separate digital logic elements are used to complete the event-triggered pulse wave generating mechanism; the other method is to utilize The programmable logic element combines the functions of separate digital logic elements such as NAND and D-FF, but the design cost is high. The present invention is designed in a single-chip microcontroller to realize an algorithm directly integrating the circuit and The program design event triggers its functions and effects, which can effectively achieve the effect of reducing cost and maintaining management. Event-triggered mechanisms are often used in a variety of different designs of electronic circuits. This design can also be effectively and widely used in a variety of different designs and related fields; it has been applied to piezoelectric material polarity cancellation drivers.

Consider the fourth diagram, which is one of the preferred embodiments of the event-triggered mechanism. This design uses the architecture of the external interrupts in the microcontroller 300. Two external interrupts are used, one of which is an input. The original CLK signal source (interrupt 1 end 3010), the other is the event source (interrupt 2 end 3020), the other is the pulse wave output 3030 pin; interrupt 1 end 3010 main function is to provide software event trigger input; If the computer system controls the system to generate the pulse signal, the input is the original clock 3040. When the computer commands, the microcontroller program execution sequence will jump to the interrupt subroutine to execute and detect the original clock signal. Interrupt 2 end 3020 main function to provide external hardware to trigger, if there is an external switch button to do the event interrupt; when there is an external event interrupt 3050, the arithmetic execution sequence jumps to the interrupt subroutine to perform; The calculation flow chart 400 is shown in Figure 5. The function of the main program of the algorithm is the initial setting and the specified interrupt input and output, and the loop is waiting for the interrupt; when the event is interrupted When it is born, enter the interrupt program; firstly, check if the system clock is positive rising edge, if otherwise continue to grab the positive rising edge of the clock; once the clock rising edge is grabbed; the counter is incremented by 1; Is low; at this time, check if the counter is 2; if it is not equal to 2, return to the starting point of the interrupt program, continue to grab the positive rising edge of the clock and continue to check whether the counter is 2; if the counter is equal to 2, the counter is reset to zero And specify the interrupt output as high; and the output pulse width is equal to the clock width and can synchronize the clock rising edge of the system itself, and finally return to the main program, waiting for the next external interrupt event. Figure 6 shows the actual test result. The upper waveform is the original signal source 500, and the lower waveform is the event trigger to generate the pulse signal 600. It can also be seen that the design can meet the expected effect.

20‧‧‧Logical design components

2010‧‧‧Original input pulse

2020‧‧‧ Event trigger source

2030‧‧‧ Output signal

300‧‧‧Microcontroller

3010‧‧‧Interrupted 1

3020‧‧‧Interrupted 2 end

3030‧‧‧ Pulse output

3040‧‧‧ Original clock

3050‧‧‧Event disruption

400‧‧‧calculation flow chart

500‧‧‧ original source

600‧‧‧ Generate pulse signal

The first picture is prior art.

The second diagram is a schematic diagram of the programmable logic component design method.

The third picture is a schematic diagram of the demand for pulse wave generation.

The fourth picture is a schematic diagram of the mechanism diagram of the event triggering.

The fifth picture is a schematic diagram of the calculation process flow of the mechanism triggered by the event.

The sixth figure is a practical test of the result screen of the present invention.

400‧‧‧calculation flow chart

Claims (5)

An event-triggered pulse wave generating device, comprising: a microcontroller, an algorithm and an external signal source capable of completing an output pulse wave having a width equal to a clock width and synchronizing a clock rising edge of the system itself, wherein the micro control The device has an external interrupt terminal for the event trigger source input, and triggers for providing the external hardware. After the external switch button is used for the event interrupt, the calculation execution sequence jumps to the interrupt subroutine for execution. The event triggering pulse wave generating device according to claim 1, wherein the microcontroller has a microcontroller separately configured and has an external interrupt function, and the microcontroller has another external interrupt terminal as the input original The CLK signal source; in addition, the output pulse output pin is specified for the microcontroller. The event triggering pulse wave generating device according to claim 1, wherein the algorithm includes a main program and an interrupt program; the main function of the algorithm is an initial setting and a specified interrupt input. With the output, the loop waits for the interrupt; when the event interrupt occurs, the plug-in program is entered; firstly, it is detected whether the system clock is a positive rising edge, and if otherwise, the clock is rising, and the clock is rising; The rising edge; then the counter is incremented by 1; at this time, the specified interrupt output is low; at this time, the check counter is 2; if not equal to 2, it returns to the starting point of the interrupt program, and continues to grab the positive rising edge of the clock and continue Check if the counter is 2; if the counter is equal to 2, the counter is reset to zero, and the interrupt output is specified as high; and the output pulse width is equal to the clock width and the clock rising edge of the system itself can be synchronized. Finally, return to the main program and wait for the next external interrupt event to occur. The event triggering pulse wave generating device as described in claim 2, wherein the external interrupt function is characterized by any interrupt input mode. The event triggering pulse wave generating device of claim 1, wherein the external signal source is characterized by a signal source having any clock.