Question

;-------------------------------------------------------------------------------
; MSP430 Assembler Code Template for use with TI Code Composer Studio
;
;
;-------------------------------------------------------------------------------
.cdecls C,LIST,"msp430.h" ; Include device header file
  
;-------------------------------------------------------------------------------
.def RESET ; Export program entry-point to
; make it known to linker.
;-------------------------------------------------------------------------------
.text ; Assemble into program memory.
.retain ; Override ELF conditional linking
; and retain current section.
.retainrefs ; And retain any sections that have
; references to current section.

;-------------------------------------------------------------------------------
RESET mov.w #__STACK_END,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW|WDTHOLD,&WDTCTL ; Stop watchdog timer

;-------------------------------------------------------------------------------
; Main loop here
;-------------------------------------------------------------------------------
       bis.b #11111111b, &P1DIR
       bic.b #11111111b, &P1OUT

loop_1:
       bis.b #11101111b, &P1OUT ; 9
    bis.b @R11, &P1OUT
       push.w R11
       call #delay
       pop.w R11

       bis.b #01111111b, &P1OUT ; 8
       bis.b @R11, &P1OUT
       push.w R11
       call #delay
       pop.w R11

       bis.b #00000111b, &P1OUT ; 7
       call #delay

       bis.b #11111101b, &P1OUT ; 6
       call #delay

       bis.b #11101101b, &P1OUT ; 5
       call #delay

       bis.b #01100110b, &P1OUT ; 4
       call #delay

       bis.b #01001111b, &P1OUT ; 3
       call #delay

       bis.b #01011011b, &P1OUT ; 2
       call #delay

       bis.b #00000110b, &P1OUT ; 1
       call #delay

       bis.b #00111111b, &P1OUT ; 0
       call #delay

delay
      
       mov #0, R5
       mov #0, R4

odd_even:
           ;Over here i need to count number of 1's in binary but cant figure out how to do it
           jnz try
           jz delay_over

try:
       bic.b #01111111b, &P1OUT
       bis.b #00111111b, &P1OUT ; 0
       jmp continue
delay_over:
           inc R4

keep_delay:
           inc R5
           cmp #1000000, R5
           jne keep_delay
           cmp #3, R4
           jne delay_over
           bic.b #01111111b, &P1OUT

           jmp continue

continue

   ret

;-------------------------------------------------------------------------------
; Stack Pointer definition
;-------------------------------------------------------------------------------
.global __STACK_END
.sect .stack
  
;-------------------------------------------------------------------------------
; Interrupt Vectors
;-------------------------------------------------------------------------------
.sect ".reset" ; MSP430 RESET Vector
.short RESET
  
Hi, i have homework where i should count number of 1's in binary that i set which have odd number then i need to display this on 7 segment display. On the code i wrote a comment where i should do this. I am working with texas insturment msp430.

Answer 1

mov.b   #0,r12
clrc    
rrc.b     r13           
L1:          
    addc    #0, r12        
    rrc.b   r13            
    jnz    L1

addc    #0, r12       

( result is in r12)