16bit to ASCII Decimal via output routine by http://elm-chan.org
;-----------------------------------------------------------------------------; ; Universal decimal string conversion (8/16 bit unsigned) ; ; Register Variables: ; Call: var1:0 = 16 bit value to be converted ; len = String length ; tmp1:0 = <Don't care> (high register must be assigned) ; tmp2 = <Don't care> ; ; Result: var1:0 = <Unknown> ; len = <Not changed> ; tmp1:0 = <Unknown> ; tmp2 = 0 ; ; Size: 30 words ; Clock: depends on output routine ; Stack: 10 bytes max (+output routine) ; ; Examples: var1 len output ; 100 0 "100" ; 1234 0 "1234" ; 0 7 " 0" ; 100 5 " 100" ; 100 2 "100" mk_decu8: clr var1 ;8 bit entry mk_decu16: ;16 bit entry clr tmp2 ;digit counter inc tmp2 ;---- decimal string generating loop clr tmp0 ;var1 /= 10; ldi tmp1,16 ; lsl var0 ; rol var1 ; rol tmp0 ; cpi tmp0,10 ; brcs PC+3 ; subi tmp0,10 ; inc var0 ; dec tmp1 ; brne PC-8 ;/ subi tmp0,-'0' ;Push the remander (a decimal digit) push tmp0 ;/ cp var0,tmp1 ;if(var =! 0) cpc var1,tmp1 ; continue digit loop; brne PC-16 ;/ cp tmp2,len ;Adjust string length (this can be removed for auto-length) brcc PC+5 ; inc tmp2 ; ldi var0,' ' ; push var0 ; rjmp PC-5 ;/ pop var0 ;Put decimal string rcall xmit ;<-- Put a char (var0) to memory, console or any display device dec tmp2 ; brne PC-3 ;/ ret
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