Display apparatus of EEPROM in emulator

Abstract

The invention discloses an EEPROM display device in a simulator, which comprises a simulation chip and a memorizer. The simulation chip is connected with the memorizer by a data / address bus. The device also comprises a management module that is connected with the memorizer by the data / address bus and used for reading and writing the data in the memorizer; a simulation communication channel is arranged between the management module and the simulation chip; when an XDATA window of the simulator is opened, the management module takes out the data of an XDATA area from the memorizer, keeps inquiring about the register bit for controlling logical attribute of an EEPROM in the simulation chip by the communication channel in real tiome, and determines whether the data in the EEPROM is displayed in the XDATA window according to the setting of the register bit. The EEPROM display device in the simulator of the invention can not only rapidly display the data in the XDATA area with high efficiency, but also can ensure that simulation process is consistent with chip products, better protect the simulation chip and guarantee the debugging efficiency of user programs.

Description

technical field [0001] The invention relates to a display device of EEPROM (Electronically Erasable Programmable Read-only Memory, electrically erasable programmable read-only memory), in particular to a display device of EEPROM in an emulator. Background technique [0002] When developing and debugging user programs in processor chips, the tools used by program developers are emulators with emulated chips. At present, many processor chips have EEPROM memory, and some EEPROMs can be used not only as the program area (CODE) in the logical concept, but also as the external data area (XDATA) in the logical concept. Generally, it is realized by setting specific register bits. When the EEPROM is used as CODE, the MOVX statement for accessing XDATA cannot access the EEPROM. Only when the EEPROM is used as XDATA can it be accessed with the statement for accessing XDATA. [0003] In the emulator, since SRAM (Static Random Access Memory) has faster access speed and greater read and ...

AI Technical Summary

Problems solved by technology

However, since the XDATA data is not read through the emulation chip, the operation process of the emulator is no longer controlled by the register bits that control the EEPROM attribute. This results in that even if the user program sets the EEPROM as CODE, it will not be used as XDATA, but when it is opened After the XDATA window of the emulator, the data belonging to the EEPROM can still be read and written, but the user program cannot.

[0005] This makes the emulator and the product chip inconsistent, and for users who are not familiar with the use of the chip, the EEPROM data can be operated in the window, but the program cannot, which will also cause misunderstandings in use and affect the development work and development of user programs. efficiency

[0006] If in order to maintain the consistency between the emulator and the product chip, the emulator takes out and displays the XDATA content through the emulation chip, although the consistency is guaranteed, but because the emulator often needs to display and allow the user to modify the XDATA content, and the XDATA window needs to be opened The data in the entire XDATA is read and displayed, which will cause huge working pressure on the emulation chip and greatly reduce the service life of the emulation chip

Images