片機(jī)原理課程設(shè)計(jì)報(bào)告--電子琴(編輯修改稿)
2025-02-14 23:24 本頁面
【文章內(nèi)容簡(jiǎn)介】 PORTA equ 08000hCTL equ 08003hOUTBIT equ 09002hIN equ 09001hPulse equ 55hPulseCNT equ 50hToneHigh equ 51hToneLow equ 52hTone equ 53hKeyBuf equ 54hSpeaker equ PORTA ljmp Start org 000bhTimer0Int: ；設(shè)置中斷0 push PSW clr TR0 mov TH0, ToneHigh mov TL0, ToneLow setb TR0 mov a, Pulse mov dptr, Speaker movx @dptr,a inc Pulse dec PulseCNT pop PSW retiToneTable: ；設(shè)置7個(gè)音節(jié)的頻率 dw 64578, 64686, 64778, 64821, 64898, 64968, 65029TestKey: ；檢測(cè)鍵輸入 mov dptr, OUTBIT mov a, 0 movx @dptr, a mov dptr, IN movx a, @dptr cpl a anl a, 0fh retKeyTable: db 16h, 15h, 14h, 0ffh db 13h, 12h, 11h, 10h db 0dh, 0ch, 0bh, 0ah db 0eh, 03h, 06h, 09h db 0fh, 02h, 05h, 08h db 00h, 01h, 04h, 07hGetKey: 讀入鍵值
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