Question: how can I write the assembly language to count on total number of characters of given string in assembly language?(relate MSP430) #include msp430.h ORG 0FF00h

how can I write the assembly language to count on total number of characters of given string in assembly language?(relate MSP430)

#include "msp430.h"

ORG 0FF00h

mystr DB "Welcome to Aeroclub Programming @JLC215!"

NAME main

PUBLIC main

ORG 0FFFEh

DC16 init

RSEG CSTACK

RSEG CODE

init: MOV #SFE(CSTACK), SP

main: NOP

MOV.W #WDTPW+WDTHOLD, &WDTCTL

BIS.B #0FFh, &P1DIR

BIS.B #0FFh, &P2DIR

MOV #mystr, R5

CLR.B R6

CLR.B R7 store total character

gonext: MOV.B @R5+, R6

CMP #0, R6

JEQ lend

INC R7

CMP.B #'a', R6

CMP.B #'{', R6

JMP gonext

lend:

MOV.B R7, &P2OUT

BIS.W #LPM4, SR

NOP

END

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