Embedded Hardware---Use of ADS tools and establishment of hardware debugging environment

1. Open CodeWarrior for ARM Developer Suite software

2. Create a new project, the project type is ARM Executalbe Image, please note that the project name and path must not be in Chinese, otherwise it cannot be opened

3. Add files to the project, [file]->new, select the File tab, enter the file name, such as main.c, select the Add to Project checkbox, and select only DebugRel in Targets (the generated image only contains basic information)

4. Add existing system files, copy the system files to the project directory, select Add files under the [Project] menu on the project page, add the corresponding files, and select DebugRel in Targets.

5. Select Create Group under the [Project] menu on the project page to classify the files.

6. Configure the project options. Click the [DebugRel Setting…] tool button on the toolbar and configure in the DebugRel Setting dialog box:

In the [Target Settings] item, select Post-Linker as ARM fromELF, and then compile and generate an executable file

[Language Settings], select ARM920T for Architecture or Processor of each language

[Linker] item, change the RO Base (memory starting address) of Simple image in the Output tab under ARM Linker to 0x30000000, change the Image entry point in the Options tab to 0x30000000, fill in 2440init.o in Object/Symbol under the Layout tab (the target file of the initialization code, such as the initialization code is 2440init.s, and 2440init.o is generated after compilation), fill in Init in Section (at the entrance of the main function in 2440init.s, a read-only code segment named Init is defined by AREA), the ARM Linker setting is completed, and the set parameters are listed in Equivalent Command Line; select Plain binary in the output format of the executable file under ARM fromELF.

7. System code analysis

2440init.s: system initialization code, setting the system working mode, initializing the stack and interrupt vector table, configuring the storage controller, specifying the entry address of the function, etc.

2440slib.s: Mainly initializes MMU

2440lib.c: some system functions, Delay function is a millisecond delay function, some system clock functions

2440lib.h

2440addr.h: defines all registers, interrupt request flags

def.h: defines data types and commonly used Size values

Uart.c: Function definitions related to the serial port

uart.h