JPH0277802A - Digital signal processing circuit - Google Patents

Abstract

PURPOSE:To embody plural processing functions at the same time by one digital signal processing circuit(DSP) by controlling a process for embodying the respective processing functions on a time-division basis. CONSTITUTION:When a start message is received from a microcomputer(muc) (not shown in figure) for control through a communication means 1, a specific processing function is started selectively by a start means 2. When an interruption is initiated, a process control means 8 selects a control process corresponding to the interruption and a processing means 5 performs the process. Then a message means 1a sends out a message to the muc through the communication means 1. Similarly, processing for an interruption is carried out thereafter and when the processing means 5 sends out a stop signal independently or when a stop message is sent out of the muc, the stop means 3 actuates a terminating means 6 to indicate whether or not an interruption is permitted. Consequently, the plural processing functions can be embodied by one DSP.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital signal processing circuit (hereinafter referred to as DSP) that can realize a desired function by performing logical processing or arithmetic processing on digitalized signals. It is.

[Conventional technology]

FIG. 5 is a configuration diagram showing an example of an automatic transmission characteristic measuring device. In this figure, 21 is a microcomputer;
2 is a DSP for generating a measurement tone, 23 is a DSP for modemo signal modulation, 24 is a DSP for a level meter, 25 is a DSP for modemo demodulation, 26 is a gate, 27 is a D/A converter, 28
is an A/D converter, 29 is a smoothing low-pass filter, 30 is a sample/hold circuit, 31 is a noise removal low-pass filter, 32 is a balanced output transformer, 33
is a balanced/unbalanced transformer.

In the automatic transmission characteristic measuring device configured in this way, starting and stopping of each function is controlled by the microcomputer 21 via I10.
For example, in order to generate a measurement tone, an activation command is given only to the measurement tone generation DSP 22, which has a built-in program that embodies the function of an oscillator.

[Problem to be solved by the invention]

However, as mentioned above, in the past, only one function was implemented per DSP, so multiple DSPs
is required, increasing costs.

The present invention was made to solve the above-mentioned problems, and aims to obtain a DSP that can simultaneously implement a plurality of functions with a single DSP.

[Means to solve the problem]

The DSP according to the present invention includes a means for communicating with a control computer, a starting means and a stopping means for selectively starting and stopping each processing function, and a plurality of preparation means for making processing functions correspond to interrupt sources. A plurality of processing means for performing processing, a plurality of termination means for stopping processing and disabling interrupts, an execution control means for selectively executing a processing function assigned to an interrupt source, and a plurality of processing means. Preparing means for functions, means for terminating IA filling means continuously in a time-sharing manner, or preparing means for one processing function.

It is equipped with a process control means for continuously executing processing means and termination means.

[Effect]

In this invention, a plurality of processing functions are executed simultaneously by controlling the processes that implement each processing function in a time-sharing manner.

[Embodiment] FIG. 1 is a diagram showing the configuration of an embodiment of a DSP of the present invention. In this figure, 1 is a communication means with a control computer (not shown), 1a is a message means, and 2.3 is a means for selectively activating each processing function.

4 is a preparation means for making a processing function correspond to an interrupt source; 5 is a logic means; a processing means for processing such as arithmetic processing; 6 is a means for stopping execution of processing and disabling interrupts; 7 is an execution control means for selectively executing the processing function assigned to the interrupt source; 8 is a process control means; means for preparing a plurality of processing functions; 4. Processing means 5. The finishing means 6 can be performed continuously in a time-sharing manner, or the preparation means 411 for one processing function.
L-method 5. The termination means 6 are executed continuously. 9 represents a gate, and 10 represents a DSP of the present invention. Further, FIG. 2 is a diagram showing a time chart showing the implementation of processing functions, and FIGS. 3 and 4 are diagrams showing I10 bus, 2-bot RA
FIG. 3 is a diagram showing an example in which DSPro of the present invention is connected using M11.

Next, the operation will be explained.

First, upon receiving an activation message sent from the control microcomputer 21 via the communication means 1, the activation means 2 selectively activates a specific processing function. That is, at this time, the preparation means 4 associates the processing function with the interrupt source, and instructs interrupt permission and execution permission. Next, when an interrupt occurs, the process control means 8 selects a control process corresponding to this interrupt, and the processing means 5 performs processing. When it is necessary to send a message, the message is sent from the message means 1a to the microcomputer 21 via the communication means 1.

Thereafter, the interrupt is processed in the same way, and when the processing means 5 autonomously sends out a stop signal or the microcomputer 21 sends out a stop message, the stopping means 3 activates the terminating means 6, Instructs to disable interrupts and disable execution.

At this time, communication with the microcomputer 21 is normally performed via the communication means 1 before termination, but if the process is stopped autonomously, no communication is performed. Furthermore, processing functions for other interrupt sources are also implemented using similar procedures.

In other words, the DSPLo of this invention makes it possible to realize multiple processing functions at the same time by controlling the processes that embody each processing function in a time-sharing manner. Processing functions can be realized.

Therefore, by connecting as shown in Fig. 3 or 4, it is possible to realize a transmission characteristic automatic measurement device equivalent to that shown in Fig. 5 by using only one DSPIO, and the device has a low cost. In addition, each means constituting the DSPLo of the present invention shown in FIG. 1 can be considerably effective even if it is actually constructed by hardware, but it is not possible to reduce the cost by using a commercially available general-purpose DSP. The requirements can be easily realized by configuring them in software, and in this case, the main body can be made smaller and more functional.

Furthermore, it goes without saying that the DSPLo of the present invention can be applied not only to the automatic transmission characteristic measuring device described above, but also to all fields such as telecommunications, robots, and image processing functions.

〔Effect of the invention〕

As described above, the present invention includes a communication means with a control computer, a starting means and a stopping means for selectively starting and stopping each processing function, and a plurality of preparation means for making processing functions correspond to interrupt sources. A plurality of processing means for performing processing, a plurality of termination means for stopping processing and disabling interrupts, an execution control means for selectively executing a processing function assigned to an interrupt source, and a plurality of processing means. Each processing function is equipped with a process control means that continuously executes the preparation means, processing means, and termination means of a function in a time-sharing manner, or continuously executes the preparation means, processing means, and termination means of one processing function. By time-sharingly controlling the process that implements the process, multiple processing functions can be executed simultaneously, and one DSP can implement multiple processing functions at the same time.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the DSP of the present invention,
Figure 2 is a time chart showing the implementation of processing functions;
Figures 4 and 5 are diagrams showing connection examples of the DSP of the present invention.
The figure is a configuration diagram showing a conventional example of a transmission specific automatic measuring device. In the figure, 1 is a communication means, 1a is a message means, 2 is a starting means, 3 is a stopping means, 4 is a preparation means, 5 is a processing means, 6
7 is a termination means, 7 is an execution control means, 8 is a process control means, 9 is a gate, 10 is a DSP of the present invention, and +1 is a 2-baud 1-RAM.

Claims (1)

[Claims] A digital signal processing circuit controlled by a control computer, comprising a communication means with the control computer, a starting means and a stopping means for selectively starting and stopping each processing function, and a processing function for an interrupt source. A plurality of preparation means to correspond, a plurality of processing means to carry out processing, a plurality of termination means to stop processing and disable interrupts, and to selectively execute processing functions assigned to interrupt sources. A process in which an execution control means and the preparation means, processing means, and termination means of the plurality of processing functions are executed continuously in a time-sharing manner, or the preparation means, processing means, and termination means of one processing function are executed continuously. A digital signal processing circuit comprising a control means.