SOFTWARE TOOLS OVERVIEW STMicroelectronics Toolchain Cross a

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INTRODUCTION CORE ADDRESSING MODES ASSEMBLY TOOLCHAIN STVD7 DEBUGGER HARDWARE TOOLS PERIPHERALS ST-REALIZER TOOLCHAINS
SOFTWARE TOOLS OVERVIEW
STMicroelectronics Toolchain
Cross assembleur: Linker: Formatter: OBSEND Librarian: Windows Debugger: STVD7 (IDE)
Raisonance:
Soon available 2006)
RAISONANCE
Cosmic Toolchain
Cross assembleur: CAST7 Compiler: CXST7 Windows Debugger: IDE: IDEA
SOFTWARE TOOLS Assembly toolchain
WINDOWS .inc WINDOWS .asm ASSEMBLER .obj .err WINDOWS .grp .tab .lst .map .sym WINDOWS .cod .lib WINDOWS OBSEND .s19
WINDOWS STVD7
STOOLCHAIN OVERVIEW
AUTOEXEC.BAT (THE WINDOWS START FILE) automatically modified installation (adds paths):
C:\Program Files\Stm\St7toolchain\ASM METAI=C:\Program Files\Stm\St7toolchain\ASM DOS4G=QUIET
ASSEMBLER:
Overview
assembler produces code target machine target ST7:
first line source code reserved specifying target processor: ST7/ first line reserved specifying instruction target processor machine description file installed C:\Program Files\STM\St7toolchain\asm: "ST7.TAB". This file describes different opcodes used assembler.
ASSEMBLER:
Overview(2)
.inc WINDOWS ASSEMBLER .obj .err
Error file: contains fatal recoverable errors Object file (will used linker)
.tab
.lst
Listing file
<file assemble>, <listing file>, <switches>
ASSEMBLER:
Options.
Options:
enable listing generation enable symbol table generation specifies object file path updates symbol table listing file defines 'string1' 'string2' enable pass-1 listing disable error generation
-SYM -OBJ=<path -FI=<mapfile -D<1
Example:
appli.asm EPROM will generate listing file appli.lst replace eprom
ASSEMBLER:
Program organisation
APPLI st72xx.inc const.inc
Include files: module1 module2 refer labels defined other modules (for instance const.asm)
st7.tab
st72xx.asm
module1.asm
module2.asm
const.asm
WINDOWS ASSEMBLER
st72xx.asm: const.asm: st7.tab:
Register memory mapping definition constant definition machine description file
EXAMPLE
ST72254.asm
st7/ target
PERIPHERALS HARDWARE REGISTERS ST72254.ASM date: 01/05/2000 Device ST72254 BYTES following addresses length segment byte 0-7F 'periph' Ports registers .PCDR DS.B port data register .PCDDR DS.B port data direction register .PCOR DS.B port option register DS.B used .PBDR DS.B port data register .PBDDR DS.B port data direction register RESERVED $E000 ROM/EPROM 8KBytes $FFE0 INTERRUPTS RESET VECTORS $FFFF Bytes STACK Bytes $0180 $0000 $007F $0080 $0100
EXAMPLE
ST72254.asm
segment byte 80-FF 'ram0' WORDS following addresses length PERIPHERALS HARDWARE REGISTERS Bytes $0000 $007F $0080 $0100 STACK Bytes $0180
segment byte 100-17F 'stack'
RESERVED
segment byte E000-FFDF 'rom'
$E000 ROM/EPROM 8KBytes $FFE0 INTERRUPTS RESET VECTORS $FFFF
segment byte FFE0-FFFF 'vectit'
EXAMPLE
Module1.asm
st7/ First line, first character
first line reserved specifying instruction target processor
module1.ASM date: 01/05/2000 Device ST72254
TITLE
"module1.ASM"
Title will included first line each page listing file
format assembly (default) include st72254 registers memory mapping file include general constants file
MOTOROLA #INCLUDE "st72254.inc" #INCLUDE "const.inc"
Motorola format (default one) Hex: Bin: %10100011 Oct: ~243 Current
EXAMPLE
Module1.asm
Program code WORDS segment 'rom' .main
Segment called 'rom': beginning user code (cf. ST72XX.INC) Initialization
Initialization
A,#$01
Main program
Public label (definition starting with "dot" character) Main loop
.loop loop Make another conversion
EXAMPLE
Module1.asm
INTERRUPT SUB-ROUTINES LIBRARY SECTION sw_rt iret ext0_rt iret ext1_rt iret css_rt iret interrupt subroutine spi_rt iret this example tima_rt iret timb_rt iret i2c_rt iret dummy iret SUB-ROUTINES LIBRARY SECTION
Regular subroutine
.sub
EXAMPLE
Module1.asm
INTERRUPT VECTOR SECTION segment 'vectit' Segment called 'vectit': DC.W dummy DC.W dummy DC.W i2c_rt DC.W dummy DC.W dummy DC.W dummy DC.W dummy DC.W timb_rt DC.W dummy DC.W tima_rt DC.W spi_rt DC.W css_rt DC.W ext1_rt DC.W ext0_rt DC.W sw_rt DC.W main ;FFE0-FFE1h location ;FFE2-FFE3h location ;FFE4-FFE5h location ;FFE6-FFE7h location ;FFE8-FFE9h location ;FFEA-FFEBh location ;FFEC-FFEDh location ;FFEE-FFEFh location ;FFF0-FFF1h location ;FFF2-FFF3h location ;FFF4-FFF5h location ;FFF6-FFF7h location ;FFF8-FFF9h location ;FFFA-FFFBh location ;FFFC-FFFDh location ;FFFE-FFFFh location
interrupt vectors (start address: FFE0
.i2c_it
.timb_it .tima_it .spi_it .css_it .ext1_it .ext0_it .softit .reset
Define word object code source code (only files). "end" directive must followed Carriage Return
EXAMPLE
Const.asm
st7/
CONST.ASM date: 01/05/2000 Device ST72254 TITLE "const.asm" format assembly (default)
MOTOROLA
BYTES Public variables, constants
Same format than other files (cf. module1.asm)
EXAMPLE
Const.asm
PUBLIC counter1 BYTES bsize blocks size bsize decimal
segment 'ram0' counter1 DS.B bsize .counter2 DS.B WORDS segment 'rom`
byte counter byte counter
Reserved bytes space ram0 counter1 counter2 will touched using short addressing mode
Define byte(s) object code
$10,$AA,50,%11111101 $B820 $9600,512
.table1 .table2
DC.B DC.W WORD
.label
{table1+2}
DC.W defines word(s) code, first WORD defines word(s) code, first
EXAMPLE
Memory Allocation
Label Address counter2 table1 $E000 $E001 label $E002 $E003 $E004 $E005 table2 $E006 $E007 $E008 $E009 Content
segment 'ram0` counter1 DS.B .counter2 DS.B bsize byte counter byte counter
counter1
WORDS
segment 'rom` .table1 .table2 .label DC.B DC.W WORD $10,$AA,50,%11111101 $B820 $9600,512 {table1+2}
EXAMPLE
Const.inc
CONST.INC date: 01/05/2000* Device ST72254 TITLE "CONST.INC"
EXTERN counter1.b counter1's address byte EXTERN counter2.b counter2's address byte EXTERN table1.w table1's address word EXTERN table2.w table2's address word
These labels have been defined zero page segment 'ram0'
Declare external labels. They will used other modules (all labels have been defined public previously)
EXAMPLE
ST72254.inc
ST72254.INC date: 01/05/2000 Device ST72254 TITLE "ST72254.INC"
EXTERN EXTERN EXTERN EXTERN
PCDR.b PCDDR.b PCOR.b PBDR.b
PCDR's address byte PCDDR's address byte PCOR's address byte PBDR's address byte
Same format than other files (cf. const.inc)
ASSEMBLER:
Defining macros
macro faster execute code: there stacking return addresses (less stack activity) program size bigger using macros than subroutines:
Each time invoke macro particular job, whole macro assembly code inserted into your source code Trade between code size execution time
Very usefull when small size code must used repeatedely
ASSEMBLER
Defining macros
macro_name
MACRO [parameter_1] parameter_2.] [LOCALlabel_name] [Body_of_the_macro] MEND
Example:
get_io MACRO LOCAL loop loop $C000 jrne loop MEND $C000 content equal then. loop. equal, macro
"LOCAL" directive avoids have labels inside macro duplicated (because same macro called several time same module)
ASSEMBLER:
Conditional assembly
Conditional assembly used ignore select whole area code Example:
#IFDEF HIGH {HIGH #const.H #ELSE #const.L #ENDIF #ENDIF
HIGH defined either:
code (#define directive) command line using switch HIGH
LINKER: Overview
linker:
Concatenates objects together create .cod file Checks resolves PUBLIC EXTERNAL references Checks places segments Scans libraries
Example:
st72254+module1+module2+const, appli; @list.rsp where list.rsp
LINKER:
Overview
.inc WINDOWS .asm ASSEMBLER .obj .err WINDOWS .grp .tab .lst .map .sym .cod
file: used formatter
file: used tool chain
file: information concerning segments, labels classes
file contains public symbols (symbol table list)
<.obj file> [+<.obj file>.], [<.cod file>], [<lib>], [+<lib>];
FORMATTER:
Overview
Obsend general file formatter which converts .cod file into executable format useable programmers debuggers Example:
OBSEND appli,f,appli.s19,
will generate file appli.s19 containing code from appli.cod "Motorola S-record" format
FORMATTER: Option.
OBSEND <file>, [destination type] [,<args>], <format>
file video Name output file
Format: specify output format
byte/address) Intel Intel with 32-b data line Intel extended Motorola S-record Motorola S-record extended S-record S-record Filled straight binary format industrial binary format
FORMATTER:
Overview
.inc WINDOWS .asm ASSEMBLER .obj .err WINDOWS .grp .tab .lst .map .sym .cod WINDOWS OBSEND .s19
Code from .cod file Motorola format this example)
OBSEND <file>, [destination type] [,<args>], <format>
LIBRARIAN:
Overview
Combines small useful object files (created user) library
Options: +filename -filename !filename *filename
adds object module library deletes object module from library updates object module library copies object module file lists library content exits prompt
LIBRARIAN:
Overview
WINDOWS .inc WINDOWS .asm .err WINDOWS .obj .grp .tab .lst .map .sym .cod .lib WINDOWS OBSEND .s19
Library
ASSEMBLER
<library_name>
PROGRAMMING TIPS
Batch file
current assembler Crash-Barrier, modules assembled separately. That means that order fixed references (and then more relative addresses), modules have assembled second time after link "-FI" option enables perform absolute patch desired listing (.lst, .cod .map): updates symbol table listing file
PROGRAMMING TIPS
Batch file
WINDOWS .inc WINDOWS .asm ASSEMBLER .obj .err WINDOWS .grp .tab .lst .map .sym WINDOWS .cod .lib WINDOWS OBSEND .s19
WINDOWS
update listing files each module up-dated listing file needed STVD7
STVD7
PROGRAMMING TIPS
Batch file
Example:
have correct result message (Build succeeded failed) Output window
*.s19 *.obj st72254.asm module1.asm module2.asm const.asm st72254 -sym -fi=appli.map module1 -sym -fi=appli.map module2 -sym -fi=appli.map This time, assembler does const -sym -fi=appli.map create .obj file uses mapfile created linker OBSEND appli.cod,f,appli.s19,
addresses
Exercise assembly langage
Constant.asm
WORDS segment 'rom` PUBLIC label WORD DC.B DC.W
baud_rate .romtable .constant label
9600, 18200, main 125, $A8, %01110100, "StRiNg", 568, $FF86 {romtable+2}
BYTES segment 'ram0` .ramtable .variable .count DS.B DS.W DS.B
Exercise assembly langage
WORDS segment 'rom' .main
Module1.asm
ramtable romtable main
Tips: 9600d 2580h; 18200d 4718h "StRiNg" 53h, 74h, 52h, 69h, 4Eh, 568d 238h 1Bh+F9h 14h; +:addition words
Exercise assembly langage
Fill memory according files'constant.asm' &'module1.asm' shown previous slides.
Label Address Content
Label
Address Content
N.B. 'Constant.obj' linked first.
$E000
Exercise assembly langage
Fill memory according files'constant.asm' &'module1.asm' shown previous slides. N.B. 'Constant.obj' linked first.
Label
ramtable variable count
Address Content
$E000
Label
Address Content
constant
$E010
main
$E014 $E016
romtable label
$E006 $E008
$E019 $E01A $E01B

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