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Calculator

Calculator. 9S12DP256 Lab 2. Convert counted string at addr1 to double number ud2 ud1 normally zero to begin with addr2 points to first invalid character : >NUMBER ( ud1 addr1 -- ud2 addr2 ). ptr. kbuf. Calculator (add) LOAD lcd256.whp LOAD keypad12.whp

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  1. Calculator 9S12DP256 Lab 2

  2. \ Convert counted string at addr1 to double number ud2 \ ud1 normally zero to begin with \ addr2 points to first invalid character : >NUMBER ( ud1 addr1 -- ud2 addr2 ) ptr kbuf \ Calculator (add) LOAD lcd256.whp LOAD keypad12.whp VARIABLE ptr VARIABLE first VARIABLE kbuf 20 ALLOT : init ( -- ) kbuf ptr ! SPI.INIT init.key lcd.init TRUE first ! ;

  3. \ Convert counted string at addr1 to double number ud2 \ ud1 normally zero to begin with \ addr2 points to first invalid character : >NUMBER ( ud1 addr1 -- ud2 addr2 ) kbuf 31 32 33 Enter decimal number 123 ptr : display ( n -- ) first @ \ if first digit IF init \ clear display FALSE first ! THEN hex2asc DUP >data8 \ display digit 1 ptr +! \ update ptr ptr @ C! ;

  4. \ Convert counted string at addr1 to double number ud2 \ ud1 normally zero to begin with \ addr2 points to first invalid character : >NUMBER ( ud1 addr1 -- ud2 addr2 ) 3 kbuf 31 32 33 Press E ptr 0 : enter ( n -- d ) DROP ptr @ kbuf - \ get no. of chars kbuf C! \ make counted string 1 ptr +! 0 ptr @ C! \ make asciiz string 0 0 kbuf \ convert ascii string >NUMBER DROP \ to double number TRUE first ! ;

  5. : add ( d1 n -- d2 ) clear.lcd enter D+ 2DUP (D.) type.lcd ; : calc ( -- ) init BEGIN wait.for.keyup getkey DUP 14 = \ E key IF enter ELSE DUP 10 = \ A key IF add ELSE DUP 12 = \ C key IF init ELSE display THEN THEN THEN AGAIN ;

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