16bit to ASCII Decimal signed via output routine by http://elm-chan.org
;-----------------------------------------------------------------------------; ; Universal decimal string conversion (8/16/32 bit signed) ; ; Register Variables: ; Call: var3:0 = 32 bit value to be displayed ; len = String length ; tmp1:0 = <Don't care> (high register must be assigned) ; tmp2 = <Don't care> ; ; Result:var3:0 = <Unknown> ; len = <Not changed> ; tmp1:0 = <Unknown> ; tmp2 = 0 ; ; Size: 58 words ; Clock: depends on output routine ; Stack: 11 bytes max (+output routine) ; ; Examples: var len output ; 100 0 "100" ; -1234 0 "-1234" ; 31450000 0 "31450000" ; 0 7 " 0" ; -400 5 " -400" ; 100 5 " 100" ; 100 2 "100" mk_dec8: clr var1 ;8 bit entry sbrc var0,7 ; dec var1 ;/ mk_dec16: clr var2 ;16 bit entry sbrc var1,7 ; dec var2 ;/ mk_dec24: clr var3 ;24 bit entry sbrc var2,7 ; dec var3 ;/ mk_dec32: ;32 bit entry clr tmp2 ;digit counter clt ;Remove sign tst var3 ; brpl PC+10 ; set ; com var0 ; com var1 ; com var2 ; com var3 ; adc var0,tmp2 ; adc var1,tmp2 ; adc var2,tmp2 ; adc var3,tmp2 ;/ inc tmp2 ;---- decimal string generating loop clr tmp0 ;var1 /= 10; ldi tmp1,32 ; lsl var0 ; rol var1 ; rol var2 ; rol var3 ; rol tmp0 ; cpi tmp0,10 ; brcs PC+3 ; subi tmp0,10 ; inc var0 ; dec tmp1 ; brne PC-10 ;/ subi tmp0,-'0' ;Push the remander (a decimal digit) push tmp0 ;/ cp var0,tmp1 ;if(var =! 0) cpc var1,tmp1 ; continue digit loop; cpc var2,tmp1 ; cpc var3,tmp1 ; brne PC-20 ;/ brtc PC+4 ;Put sign ldi var0,'-' ; push var0 ; inc tmp2 ;/ 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
file: /Techref/atmel/avr/bin2ascii16bs-ec.htm, 4KB, , updated: 2007/9/14 18:34, local time: 2024/10/13 19:53,
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