115 lines
3.7 KiB
NASM
115 lines
3.7 KiB
NASM
# riscv assembly raspberry pico2 rp2350
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# program appstring.s
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# connexion putty com3
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/*********************************************/
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/* CONSTANTES */
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/********************************************/
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/* for this file see risc-v task include a file */
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.include "../../constantesRiscv.inc"
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.equ BUFFERSIZE, 100
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/*******************************************/
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/* INITIALED DATAS */
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/*******************************************/
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.data
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szMessStart: .asciz "Program riscv start.\r\n"
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szMessEndOk: .asciz "Program riscv end OK.\r\n"
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szCariageReturn: .asciz "\r\n"
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szMessString: .asciz "String :\n"
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szString1: .asciz "Alphabet : "
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sComplement: .fill BUFFERSIZE,1,0
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szString2: .asciz "abcdefghijklmnopqrstuvwxyz"
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.align 2
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/*******************************************/
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/* UNINITIALED DATA */
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/*******************************************/
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.bss
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.align 2
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/**********************************************/
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/* SECTION CODE */
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/**********************************************/
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.text
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.global main
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main:
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call stdio_init_all # général init
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1: # start loop connexion
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li a0,0 # raz argument register
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call tud_cdc_n_connected # waiting for USB connection
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beqz a0,1b # return code = zero ?
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la a0,szMessStart # message address
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call writeString # display message
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la a0,szMessString # message address
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call writeString # display message
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la a0,szString1 # message address
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call writeString # display message
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la a0,szCariageReturn # message address
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call writeString # display message
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la a0,szMessString # message address
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call writeString # display message
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la a0,szString2 # message address
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call writeString # display message
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la a0,szCariageReturn # message address
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call writeString # display message
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la a0,szString1
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la a1,szString2
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call append
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la a0,szMessString # message address
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call writeString # display message
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la a0,szString1 # message address
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call writeString # display message
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la a0,szCariageReturn # message address
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call writeString # display message
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la a0,szMessEndOk # message address
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call writeString # display message
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call getchar
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100: # final loop
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j 100b
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/*********************************************/
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/* add string to string */
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/*********************************************/
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/* no verfication size complement buffer */
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/* a0 contains address String 1 */
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/* a1 contains address String 2 */
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append:
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addi sp, sp, -4
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sw ra, 0(sp)
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li t0,0 # counter byte string 1
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1:
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add t1,a0,t0
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lbu t2,(t1) # load byte string 1
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beqz t2,2f # zero final ?
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addi t0,t0,1 # no -> increment counter
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j 1b # loop
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2:
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li t3, 0 # counter byte string 2
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3:
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add t4,a1,t3
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lbu t5,(t4) # load byte string 2
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add t1,a0,t0
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sb t5,(t1) # store byte string 1
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beqz t5,100f # zero final ? -> end
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addi t3,t3,1 # increment counter
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addi t0,t0,1
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j 3b # end loop
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100:
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lw ra, 0(sp)
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addi sp, sp, 4
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ret
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/************************************/
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/* file include Fonctions */
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/***********************************/
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/* for this file see risc-v task include a file */
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.include "../../includeFunctions.s"
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