CN109683985B - DSP multi-image starting method based on AIS command - Google Patents

DSP multi-image starting method based on AIS command Download PDF

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CN109683985B
CN109683985B CN201811552079.3A CN201811552079A CN109683985B CN 109683985 B CN109683985 B CN 109683985B CN 201811552079 A CN201811552079 A CN 201811552079A CN 109683985 B CN109683985 B CN 109683985B
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program
ais
command
dsp
mirror
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CN109683985A (en
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刘盟超
韩帅
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CETC 54 Research Institute
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/445—Program loading or initiating
    • G06F9/44505—Configuring for program initiating, e.g. using registry, configuration files
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/445—Program loading or initiating
    • G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading

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  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

The invention discloses a DSP multi-mirror starting method based on an AIS command, which is used for solving the problem of multi-mirror starting of a DSP digital signal processing system. The technical scheme is that a plurality of image files are addressed and selected according to user requirements through a multi-image program starting algorithm, and are loaded into a program memory of a DSP (digital signal processor) from an external memory by analyzing an AIS (automatic identification system) command and automatically executed. The invention utilizes the multi-image program starting algorithm to flexibly and selectively execute a plurality of image files, realizes the overloading and switching of the DSP program according to different user requirements, and improves the universality, the adaptability and the maintainability of the digital signal processing system.

Description

DSP multi-image starting method based on AIS command
Technical Field
The invention relates to the technical field of digital signal processing, in particular to a DSP multi-image starting method based on an AIS command.
Background
The AIS is an abbreviation of Application Image Script (Application Image Script), which is a special command set for Image loading and running. A program starting module capable of receiving AIS commands is usually integrated in a digital signal processing chip (DSP), and application image loading and starting operation are completed when the DSP is powered on. These boot modules generally have a single function, and only can read a unique mirror image from a fixed address for execution, and cannot implement multi-mirror boot or a function of addressing a mirror image storage address. With the development and diversified application of digital technology, more and more digital signal processing systems require the DSP to realize double-image or multi-image starting, and proper images are selected from a plurality of images to be started and executed during each task execution according to different use requirements, so that the diversified application requirements are met. This requires the program start module of the DSP to have the functions of addressing and selecting from multiple application images, and the self-contained program start module of the DSP realizes these functions, so a flexibly configurable DSP multi-image start method is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a DSP multi-image starting method based on AIS command flexibility and configuration.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a DSP multi-image starting method based on an AIS command comprises the following steps:
step 1, automatically loading and executing a multi-mirror image program starting program: the image file in the multi-image program starting program is used as an image file which is loaded by default when the DSP is electrified and is stored in an initial address space of an external memory of the DSP;
step 2: executing a mirror selection strategy: the multi-mirror image program starting program selects one mirror image file in the mirror image file group as a current mirror image file; the mirror image selection strategy is formulated according to the use requirements of users and is integrated into a starting program of a multi-mirror image program; the mirror image file group comprises more than 1 mirror image file which converts the application program into the image file containing the AIS command according to the user requirement; the mirror image files are stored in the address space of the DSP external memory in a non-overlapping way; all the mirror image files are manufactured by using an AIS design tool;
and step 3: loading a mirror image file; determining the storage address of the current mirror image file in a DSP external memory; reading a current mirror image file;
and 4, step 4: detecting whether an AIS command is received, if so, turning to step 5; otherwise, turning to the step 4;
and 5: and analyzing the AIS command: the multi-image program starting program completes the loading of the current image file by analyzing the AIS command and controls the DSP to automatically run; and turning to step 4.
Preferably, the step 5 specifically includes the following steps:
when the AIS command 'program block Load (Section Load)' is analyzed, the multi-mirror program starting program reads the corresponding mirror file block from the external memory into the internal program storage space;
when the AIS command ' Enable CRC ' (Enable CRC) ' is analyzed, the multi-mirror program starting program enables the cyclic check coding (CRC) of the mirror file;
when the AIS command 'close CRC (Disable CRC)' is analyzed, the multi-image program starting program closes the cyclic check coding (CRC) of the image file;
when the AIS command 'validation CRC (valid CRC)' is analyzed, the multi-image program starting program carries out cyclic check coding (CRC) on the image file read from the external memory, the coding result is compared with the coding result in the file for validation, if the validation is passed, the next command is continuously executed, otherwise, the image file read from the external memory is read again and is validated again;
when the AIS command 'program block filling (Section Fill)' is analyzed, the multi-mirror program starting program fills the designated internal program storage space into the content required by the AIS command;
when an AIS command 'Function setting (Function execution)' is analyzed, the multi-image program starting program carries out initialization setting on the internal Function module of the DSP;
when the AIS command 'Jump & Close' is resolved, the multi-mirror program startup program ends the running of the current program and jumps the program Pointer (PC) of the DSP to the user application program to run.
The invention has the beneficial effects that: the invention addresses and selects a plurality of image files according to the user requirements, realizes the overloading and switching of the DSP application program according to different user requirements, and improves the universality, the adaptability and the maintainability of the digital signal processing system.
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FIG. 1 is a flowchart of a multi-mirroring program initiation procedure in accordance with an embodiment of the present invention;
Detailed Description
Example 1:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
A DSP multi-image starting method based on an AIS command comprises the following steps:
step 1, automatically loading and executing a multi-mirror image program starting program: the image file in the multi-image program starting program is used as an image file which is loaded by default when the DSP is electrified and is stored in an initial address space of an external memory of the DSP;
step 2: executing a mirror selection strategy: the multi-mirror image program starting program selects one mirror image file in the mirror image file group as a current mirror image file; the mirror image selection strategy is formulated according to the use requirements of users and is integrated into a starting program of a multi-mirror image program; the mirror image file group comprises more than 1 mirror image file which converts the application program into the image file containing the AIS command according to the user requirement; the mirror image files are stored in the address space of the DSP external memory in a non-overlapping way; all the mirror image files are manufactured by using an AIS design tool;
and step 3: loading a mirror image file; determining the storage address of the current mirror image file in a DSP external memory; reading a current mirror image file;
and 4, step 4: detecting whether an AIS command is received, if so, turning to step 5; otherwise, turning to the step 4;
and 5: and analyzing the AIS command: the multi-image program starting program completes the loading of the current image file by analyzing the AIS command and controls the DSP to automatically run; and turning to step 4.
Whether the program is a user program or a multi-image program starting program, an AIS design tool is used for converting an all-out file generated by compiling a DSP program into a binary image file all-in;
the image file is stored in the DSP external memory, wherein the image file in the multi-image program starting program is stored in the initial address of the external memory, namely the address 0; other user program image files are stored to other address spaces that are not the starting address.
The multi-mirror program starting program finishes loading the mirror file and controls the DSP to automatically run by analyzing the AIS command, and the method comprises the following steps of:
a. "chunk Load (Section Load)": reading the mirror image file block from the external memory into the internal program storage space;
b. "Enable CRC check (Enable CRC)": enabling cyclic check coding (CRC) of the image file;
c. "close CRC check (Disable CRC)": closing a cyclic check code (CRC) of the image file;
d. "Validate CRC check (valid CRC)": performing cyclic check coding (CRC) and comparison verification, and re-reading file blocks which do not pass the verification;
e. "Section Fill": filling the designated internal program storage space as the content required by the command;
f. "Function setting (Function execution)": initializing and setting internal function modules of the DSP;
g. "Jump and end (Jump & Close)": ending the running of the current program, and jumping a program Pointer (PC) of the DSP to a user application program for running;
4. the image file is ended by a Jump and Close command, so that after the Jump and Close command is analyzed, the DSP ends the multi-image program starting program and jumps to the user application program to run.

Claims (2)

1. A DSP multi-image starting method based on an AIS command is characterized by comprising the following steps:
step 1, automatically loading and executing a multi-mirror image program starting program: the image file in the multi-image program starting program is used as an image file which is loaded by default when the DSP is electrified and is stored in an initial address space of an external memory of the DSP;
step 2: executing a mirror selection strategy: the multi-mirror image program starting program selects one mirror image file in the mirror image file group as a current mirror image file; the mirror image selection strategy is formulated according to the use requirements of users and is integrated into a starting program of a multi-mirror image program; the mirror image file group comprises more than 1 mirror image file which converts the application program into the image file containing the AIS command according to the user requirement; the mirror image files are stored in the address space of the DSP external memory in a non-overlapping way; all the mirror image files are manufactured by using an AIS design tool;
and step 3: loading a mirror image file; determining the storage address of the current mirror image file in a DSP external memory; reading a current mirror image file;
and 4, step 4: detecting whether an AIS command is received, if so, turning to step 5; otherwise, turning to the step 4;
and 5: and analyzing the AIS command: the multi-image program starting program completes the loading of the current image file by analyzing the AIS command and controls the DSP to automatically run; and turning to step 4.
2. The AIS command-based DSP multi-image startup method according to claim 1, wherein said step 5 comprises the following specific steps:
when the AIS command 'program block Load (Section Load)' is analyzed, the multi-mirror program starting program reads the corresponding mirror file block from the external memory into the internal program storage space;
when the AIS command ' Enable CRC ' (Enable CRC) ' is analyzed, the multi-mirror program starting program enables the cyclic check coding (CRC) of the mirror file;
when the AIS command 'close CRC (Disable CRC)' is analyzed, the multi-image program starting program closes the cyclic check coding (CRC) of the image file;
when the AIS command 'validation CRC (valid CRC)' is analyzed, the multi-image program starting program carries out cyclic check coding (CRC) on the image file read from the external memory, the coding result is compared with the coding result in the file for validation, if the validation is passed, the next command is continuously executed, otherwise, the image file read from the external memory is read again and is validated again;
when the AIS command 'program block filling (Section Fill)' is analyzed, the multi-mirror program starting program fills the designated internal program storage space into the content required by the AIS command;
when an AIS command 'Function setting (Function execution)' is analyzed, the multi-image program starting program carries out initialization setting on the internal Function module of the DSP;
when the AIS command 'Jump & Close' is resolved, the multi-mirror program startup program ends the running of the current program and jumps the program Pointer (PC) of the DSP to the user application program to run.
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