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8051 Development Tools
http://bit.kuas.edu.tw/~8051Assembler / Simulator / C Compiler
Tools Used in This Course
EDITORPROGRAM
myfile.a51
ASSEMBLERPROGRAM
myfile.lst
myfile.hex
Simulator
ASEM.EXE
WORD
TS Controls Emulator 8051 1.00
Download Tools
• Please go to the web site http://bit.kuas.edu.tw/~8051
and download the files with underlines.
Assembler– Download ASEM-51 v1.3 and unzip it into a sub-
directory.
Simulator – Emulator 8051 V1.0 by TS Controls is a software
simulator for 8051.
Assembler
• ASEM-51, by W.W. Heinz, is a free 8051 macro assembler for MS-DOS, Windows and Linux.
• It is a two-pass macro assembler for the Intel MCS-51 family of microcontrollers. – Issue "ASEM PROG2-1.A51" within DOS box will pro
cess the source file "PROG2-1.A51" and generate a output file "PROG2-1.HEX" in Intel-HEX format and a list file "PROG2-1.LST" in plain text.
• Refer to "ASEM_51.DOC" for detail usage. The example program "DEMO.A51" is very instructive.
Demo
C:\Documents and Settings\pcs3412>cd ..
C:\Documents and Settings>cd ..
C:\>cd 8051asm
C:\8051asm>ASEM PROG2-1.A51
no errors
C:\8051asm>dir
2002/12/31 上午 01:30 81,920 ASEMW.EXE
:
2008/09/29 上午 11:40 50 PROG2-1.hex
2008/09/29 上午 11:40 3,460 PROG2-1.lst
C:\8051asm>
PROG2-1.A51
ORG 0H ;start (origin) at location 0
MOV R5,#25H ;load 25H into R5
MOV R7,#34H ;load 34H into R7
MOV A,#0 ;load 0 into A
ADD A,R5 ;add contents of R5 to A
;now A = A + R5
ADD A,R7 ;add contents of R7 to A
;now A = A + R7
ADD A,#12H ;add to A value 12H
;now A = A + 12H
HERE:SJMP HERE ;stay in this loop
END ;end of asm source file
Part of PROG2-1.LST
Line I Addr Code Source
1: N 0000 ORG 0H ;start (origin) at location 0
2: 0000 7D 25 MOV R5,#25H ;load 25H into R5
3: 0002 7F 34 MOV R7,#34H ;load 34H into R7
4: 0004 74 00 MOV A,#0 ;load 0 into A
5: 0006 2D ADD A,R5 ;add contents of R5 to A
6: ;now A = A + R5
7: 0007 2F ADD A,R7 ;add contents of R7 to A
8: ;now A = A + R7
9: 0008 24 12 ADD A,#12H ;add to A value 12H
10: ;now A = A + 12H
11: 000A 80 FE HERE:SJMP HERE ;stay in this loop
12: END ;end of asm source file
PROG2-1.HEX
:0C0000007D257F3474002D2F241280FE1B
:00000001FF
Simulator
• Emulator 8051 V1.0 by TS Controls is a software simulator for 8051. – Execute Tsce0100.exe– Load PROG2-1.HEX and execute it
Load PROG2-1.HEX
Registers
Program List
Step by Step Execution
Internal RAM
ORG 0H ;start (origin) at location 0
MOV R5,#25H ;load 25H into R5
MOV R7,#34H ;load 34H into R7
MOV A,#0 ;load 0 into A
ADD A,R5 ;add contents of R5 to A
;now A = A + R5
ADD A,R7 ;add contents of R7 to A
;now A = A + R7
ADD A,#12H ;add to A value 12H
;now A = A + 12H
HERE:SJMP HERE ;stay in this loop
END ;end of asm source file
Stop The Program
C Compiler
• Small Device C Compiler– SDCC - Small Device C Compiler is a free C compiler
for 8051, although library is incomplete. – Download sdcc-2.3.0-i586-mingw32msvc.zip and unzi
p it to "c:\" with directory structure preserved. – Add "c:\sdcc\bin" to DOS search path. – Issue "sdcc --code-loc 0x4000 --xram-loc 0x8000 Ex
7-1.c" within DOS box will generate “Ex7-1.ihx" in Intel-HEX format,
• "--code-loc 0x4000" is used to specify starting code address.• "--xram-loc 0x8000" is used to specify starting address of ext
ernal data memory. – Refer to "c:\sdcc\share\doc\sdcc\sdccman.pdf" for SD
CC Compiler User Guide.
Ex7-1.c
#include <8051.h>
void main(void)
{
unsigned char z;
for (z=0; z<=255; z++)
P1=z;
}
Compiler Ex7-1.c
Ex7-1.ihx:0440000002405032F8
:01400B003282
:01401300327A
:01401B003272
:01402300326A
:01402B003262
:0D40500075810712404CE582600302403389
:03405D00024033EB
:0540330012403880FE80
:024038007A000C
:0C403A008A037C00C374FF9BE49C4005DB
:054046008A900A80EFE2
:01404B002252
:03404C007582007A
:01404F00224E
:00000001FF
