JPS622332A - Data collecting system - Google Patents

Abstract

PURPOSE:To collect only a data to be traced, by providing an address setting part for setting an address area to be traced, and a comparing part of its set address and a microcomputer effective address. CONSTITUTION:In case of tracing an addres of a microcomputer in a data collecting device 1, an address line 4 is connected to a logic analyzer 3 and a trigger address area setting and comparing part 2. Also, an MI cycle line 5 is connected to a comparing part 2b. Next, the output of the trigger address area setting and comparing part 2 is connected to an external clock terminal of the analyzer 3. The trigger address area setting and comparing part 2 sets an address area, and supplies an external clock to the analyzer 3 through an external clock line 6, if an effective address of a CPU 1a is within a set area. The analyzer 3 accumulates the effective address of the CPU 1a in synchronizin with the external clock. Accordingly, a memory area in the analyzer 3 can be utilized effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data collection method using a logic analyzer.

[Prior Art] Conventionally, when tracing the effective address of a microcomputer using a logic analyzer or the like, a trace trigger address is set on the logic analyzer side, and previous data or subsequent data is set based on the set trigger address. I was trying to collect data.

[Problems to be solved] In the conventional data collection method described above, the trace trigger address is set on the logic analyzer side, and the set trigger collects previous or future data based on the address. , the previous data or subsequent data including the trigger address can only be traced for the size of the memory area included in the logic analyzer, so if the program has a complex configuration, it will not be possible to trace the data with the memory area size included in the logic analyzer. The drawback was that there were cases where it was not possible.

[Means for Solving Problems] The present invention eliminates the conventional drawback of being able to trace previous data or subsequent data only for the size of the memory area included in the logic analyzer, and enables tracing even in the case of a complex program configuration. It aims to provide a data collection method.

To this end, the present invention provides an address setting section for setting an address area to be traced, and an address set by the address setting section and a microcomputer effective address in a data collection method that uses a logic analyzer to trace the effective address of a microcomputer. The present invention provides a data collection method characterized in that it has a comparing section and collects only the data that is desired to be traced.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 0, l is a data collection device, 2 is a trigger address area setting comparison section, and the trigger address area setting comparison section 2 sets an address area to be traced. It has an address area setting section 2a, and a comparison section 2b for comparing the address set by the address area setting section 2a and the microcomputer effective address of the data collection device l. 3 is the logic analyzer, 4 is the address line of the data collection device l, 5
denotes the MI cycle line of the data collection device 1, and 6 denotes the external clock line, where la is the CPU and 1b is the RA.
M and IC are ROMs. Next, the operation will be explained.

When tracing the address of the microcomputer in the data collection device 1, the address line 4 is connected to the input data terminal of the logic analyzer 3 and the trigger address area setting and comparison section 2, and the MI cycle line 5 is connected to the trigger address area setting and comparison section 2. Connect to 2. Then, the output of the trigger address area setting comparison section 2 is connected to an external clock terminal of the logic analyzer 3. In this state, the trigger address area setting comparator 2 sets an address area, and supplies an external clock to the logic analyzer 3 through the external clock line 6 if the effective address of the CPU 1a is within the set area. The logic analyzer 3 then stores the effective address of the CPU Ia in synchronization with the external clock.

Therefore, the memory area within the logic analyzer 3 can be used effectively.

[Effects of the Invention] As is clear from the above description, the present invention provides an address setting section for setting an address area to be traced and an address setting section for a data collection method of tracing the effective address of a microcomputer using a logic analyzer. The data collection method is characterized by having a comparison section between the address set by the CPU and the effective address of the microcomputer, and collecting only the data to be traced, so the external clock is supplied to the logic analyzer only when the CPU effective address is within the set area. Therefore, there is an effect that the memory area within the logic analyzer can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the data collection method of the present invention. 1: Data collection device 1 a: CPU 2 Nitrigger address area setting comparison unit 2a Nitrigger address area setting unit 2b: Comparison unit 3: Logic analyzer

Claims (1)

[Claims] In a data collection method that uses a logic analyzer to trace the effective address of a microcomputer,
A data collection method comprising an address setting section for setting an address area to be traced, and a comparison section for comparing the address set by the address setting section with a microcomputer effective address, and collecting only data to be traced.