Program programming and loading operation method of on-chip programmable system

Abstract

The invention discloses a program programming and loading operation method of an on-chip programmable system. According to the technical scheme, the on-chip programmable system comprises a CPU, a programming control unit, a loading control unit, a first bidirectional multiplexer, a second bidirectional multiplexer, an on-chip program cache region and a working mode indication bit register. Different working modes of a working mode indication bit register are set, so that during programming, a program is sent to an on-chip programmable system through a debugging interface, and the program is programmed to a nonvolatile memory chip through a CPU, a programming control unit and a first bidirectional multiplexer in sequence; during loading, a program sequentially passes through the nonvolatile memory chip, the first bidirectional multiplexer, the loading control unit and the second bidirectional multiplexer and is written into the on-chip program cache region; and during running, the CPU reads the instruction cache region through the second bidirectional multiplexer and executes the program. The method has the characteristics of simple steps and high maintainability and flexibility.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a program programming and loading operation method of an on-chip programmable system. Background technique [0002] At present, the programmable system on chip is usually the most important chip on the development board, called the main chip, and the architecture of the chip is mostly composed of a CPU (Central Processing Unit, central processing unit) and programmable logic. Such as figure 1 As shown, the application program must be programmed and loaded when the programmable system on chip executes the application program. Among them, the programming method is: firstly, connect the computer used for development with the emulator, and then connect the emulator to the development board through the debugging interface; then, the developer selects the appropriate programming program in the computer according to the hardware environment of the development board. The program ru...

AI Technical Summary

Problems solved by technology

[0003] The shortcoming of the programming and loading method of the above-mentioned application program is that the bootloader solidified inside the CPU and the programming program in the computer are not universal.

When the hardware environment of the development board changes, the original programming program and boot program may not be able to access the hardware resources on the development board normally, and cause the on-chip programmable system to fail to work

In the board-level design stage of the development board, if the non-volatile memory chip needs to be replaced, the corresponding programming program must be replaced at the same time; in the design stage of the programmable system on chip, in order to achieve flexible adaptability of the system, Arbitrary functional modules are implemented with programmable logic and mounted on the CPU bus in the form of an IP Core (Intellectual Property Core). Obviously, it is impossible to customize the bootloader and programming program for each on-chip programmable system

To sum up, the above-mentioned application code has many limitations in the process from programming to loading, with many steps, time-consuming, and poor adaptability, which reduces the maintainability of the system and the flexibility of the system design process.

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