ARM assembly language cortex-m0

Extract Alphabetical characters from a String Array and Sort them in ascending order

• Create your own string array as follows:

Full name : StarID

Example: Arm Assembly: ab7328cd

• Extract alphabetical characters from the string array and store them into memory with its first element pointed by R5 (R5=0x40000100)
  • Look at ASCII table to find the ASCII value for different characters.
• Using the insertion sort algorithm, sort the alphabetical characters stored in the memory pointed by R5 in ascending order (min to max).
  • The sorted characters must be stored in memory with its first element pointed to by R5 and should not contain numeric characters.
  • The program must be able to work for ANY size array

Code template:(you can modify the template if needed)

AREA FLASH, CODE, READONLY ENTRY EXPORT __main EXPORT SystemInit ; System Init routine SystemInit

sizeOfItem EQU 1 ;sizeOf(byte) = 1

srcArrayAddr RN 7 lenAddr RN 5

destArrayAddr RN 6

__main

init

LDR lenAddr, =len3 ;length of the given array LDR srcArrayAddr, =array3 ;the memory address of ;the first element (number) of the given array

LDR destArrayAddr, =0x40000100 ;memory location (address) used ;for keeping the SORTED array

;;; More initialization here ;;; copyArray LDRB R0, [R7] ;load R0 with 1 character from string array ADDS R7, R7, #1 ; increase the address pointed by R7 STRB R0, [R6] ;STORE one-byte from R0 (last 8 bits) into memory at the ;address pointed to by R6 ADDS R6, R6, #1

;;; Copy data in srcArrayAddr to destArrayAddr ;;; Only need to perform this once doWork

;;; Your code goes here

done B done ;Done

;;;;;;;;;;;;;;; The given array (at the lab check-off, your code should work for both arrays) len1 DCB 8 array1 DCB -87, 69, 0, -128, -1, 100, 43, 12

len2 DCB 8 array2 DCB 54, -119, 8, -39, 1, -93, 21, 127

Len3 DCB 22 Array3 DCB "Arm Assembly: ab7328cd",0

END