Writing based on stm32

One 、 stay Keil Create a new project in the environment

1. New projects

Click on project, choice New uVision Project Create project , Name project and save

Select chip ：STM32F103VE, Click on OK 

  then CMSIS Choose from CORE, stay Device Choose Startup, Click after selection OK

2. Add source file

Right click the directory just now Source Group 1, choice Add New Item to Group 'Source Group 1'...

 

Select the type of file , Click on Asm Files(.s) Add assembly file , Enter the file name and click Add

Click on Source Group 1 see text.s

Two 、 Code writing , Compile and debug

1. Code writing

stay text.s Add code to

 AREA MYDATA, DATA
	
 AREA MYCODE, CODE
	ENTRY
	EXPORT __main
 
__main
	MOV R0, #10
	MOV R1, #11
	MOV R2, #12
	MOV R3, #13
	;LDR R0, =func01
 
	BL	func01
	;LDR R1, =func02
	BL	func02
	
	BL 	func03
	LDR LR, =func01
	LDR PC, =func03
	B .
		
func01
	MOV R5, #05
	BX LR
	
func02
	MOV R6, #06
	BX LR
	
func03
	MOV R7, #07
	MOV R8, #08	
	BX LR

  Make initial settings , Click on Options for Target

  stay Output Under the interface , Check  Create HEX File, Can be created hex file

stay  Debug Under the interface , Check  Use Simulator 

  We need to change Dialog And the right side Parameter Here's the picture

Debugging operation , Results in line with expectations , The value of the register is consistent with the program setting , The details are shown in the following figure ：

 

 

  3、 ... and 、 Analysis generated HEX file

Open in Notepad hex file , Is a string of hexadecimal characters

 

 

 1. Extended linear address record

Extended linear address record （hex The first row of the file is hexadecimal ） Also called 32 Bit address record or HEX386 Record

These records contain the high of the data address 16 position

Extended linear address records always have two data bytes , The appearance is as follows （ Here I use tags to easily correspond to the original data ）:

:020000040800F2

When an extended linear address record is read , The extended linear address stored in the data field is saved , It is applied from Intel HEX Subsequent records read from the file . The linear address remains valid , Until it is changed by another extended address record . The absolute memory address of the data record is obtained by adding the address field in the record to the shifted address data from the extended linear address record .

2. Data section

Intel HEX It consists of any number of hexadecimal records . Each record contains 5 Domains , They are arranged in a certain format ：:llaaaatt[dd...]cc. Each group of letters corresponds to a different field , Each letter corresponds to a hexadecimal coded number . Each field consists of at least two hexadecimal coded digits , They form a byte , As described below ：:llaaaatt[dd…]cc

3. At the end of the file

In the last row of the file , Is the end sign of a file ：

:00000001FF

 

 

reference ：(3 Bar message ) Keil Create... In the environment STM32 Assembly language engineering and analysis HEX The contents of the document _m0_58414679 The blog of -CSDN Blog