84 lines
3.7 KiB
Text
84 lines
3.7 KiB
Text
/* ARM assembly Raspberry PI */
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/* program cursorMove.s */
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/* Constantes */
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.equ STDOUT, 1 @ Linux output console
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.equ EXIT, 1 @ Linux syscall
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.equ WRITE, 4 @ Linux syscall
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/* Initialized data */
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.data
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szMessStartPgm: .asciz "Program start \n"
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szMessEndPgm: .asciz "Program normal end.\n"
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szMessColorRed: .asciz "Color red.\n"
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szCodeInit: .asciz "\033[0m" @ color reinit
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szCodeRed: .asciz "\033[31m" @ color red
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szCodeBlue: .asciz "\033[34m" @ color blue
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szMessMove: .asciz "\033[A\033[6CBlue Message up and 6 location right."
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szMessMoveDown: .asciz "\033[31m\033[BRed text location down"
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szMessTopLeft: .asciz "\033[;HTOP LEFT"
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szCarriageReturn: .asciz "\n"
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/* UnInitialized data */
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.bss
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/* code section */
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.text
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.global main
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main:
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ldr r0,iAdrszMessStartPgm @ display start message
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bl affichageMess
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ldr r0,iAdrszCodeRed @ color red
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bl affichageMess
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ldr r0,iAdrszMessColorRed
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bl affichageMess
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ldr r0,iAdrszCodeBlue
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bl affichageMess
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ldr r0,iAdrszMessMove
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bl affichageMess
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ldr r0,iAdrszMessMoveDown @ move pointer down
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bl affichageMess
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ldr r0,iAdrszMessTopLeft
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bl affichageMess
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ldr r0,iAdrszCarriageReturn @ start next line
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bl affichageMess
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ldr r0,iAdrszCodeInit @ color reinitialize
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bl affichageMess
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ldr r0,iAdrszMessEndPgm @ display end message
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bl affichageMess
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100: @ standard end of the program
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mov r0, #0 @ return code
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mov r7, #EXIT @ request to exit program
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svc 0 @ perform system call
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iAdrszMessStartPgm: .int szMessStartPgm
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iAdrszMessEndPgm: .int szMessEndPgm
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iAdrszCodeInit: .int szCodeInit
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iAdrszCodeRed: .int szCodeRed
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iAdrszCodeBlue: .int szCodeBlue
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iAdrszMessColorRed: .int szMessColorRed
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iAdrszMessMove: .int szMessMove
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrszMessMoveDown: .int szMessMoveDown
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iAdrszMessTopLeft: .int szMessTopLeft
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/******************************************************************/
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/* display text with size calculation */
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/******************************************************************/
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/* r0 contains the address of the message */
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affichageMess:
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push {r0,r1,r2,r7,lr} @ save registers
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mov r2,#0 @ counter length */
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1: @ loop length calculation
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ldrb r1,[r0,r2] @ read octet start position + index
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cmp r1,#0 @ if 0 its over
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addne r2,r2,#1 @ else add 1 in the length
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bne 1b @ and loop
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@ so here r2 contains the length of the message
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mov r1,r0 @ address message in r1
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mov r0,#STDOUT @ code to write to the standard output Linux
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mov r7, #WRITE @ code call system "write"
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svc #0 @ call system
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pop {r0,r1,r2,r7,lr} @ restaur registers
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bx lr @ return
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