键盘扫描汇编程序

文章摘要：;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!;12Mhz Crystal!!!!!!!!!!!!!!!!!!!!!!!12周期单片机delay20ms:mov r7,#250delay20msd0:mov r6,#60delay20msd1:djnz r6,$ djnz r7,delay20msd0 ret tab:db 11100111b,10000100b,11010011b,11010110b,10110100b

键盘扫描汇编程序,标签：嵌入式系统开发,嵌入式开发,http://www.88dzw.com
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
;12Mhz Crystal!!!!!!!!!!!!!!!!!!!!!!!12周期单片机
delay20ms:mov r7,#250
delay20msd0:mov r6,#60
delay20msd1:djnz r6,$
            djnz r7,delay20msd0
            ret
           
tab:db 11100111b,10000100b,11010011b,11010110b,10110100b,

01110110b,01110111b,11000100b,11110111b,11110110b

db 11110101b,00110111b,01100011b,10010111b,01110011b,

01110001b,01100111b,10110101b,00100001b,10000111b
db 00100011b,00010101b,00010111b,11110001b,11110100b,10110110b

         end

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