基本上，我的微控制器应该根据按下按钮（PTH）播放声音，然后按下并点亮LED（PORTB）。我所坚持的是如何设置扬声器按下按钮时输出声音。很多代码都基于此处的代码：http://www.microdigitaled.com/HCS12/Hardware/Dragon12-Plus-Support.htm
特别是关于蜂鸣器的链接。此外，当我使用提供的代码时，我能够听到来自微控制器的声音;但是，当我尝试将按钮包含在代码中时。
我非常感谢任何提示，评论，提示或建议。非常感谢你！
到目前为止，这是我的代码：
;----------------------USE $1000-$2FFF for Scratch Pad
R1 EQU $1001
R2 EQU $1002
R3 EQU $1003
R4 EQU $1004
;code section
ORG $2000 ;Flash ROM address for Dragon12+
Entry:
LDS #$2000 ;Stack
BSET DDRT,%00100000 ;PTT5 as Output pin for buzzer
BSET DDRP,#$0F ; Set Port P pins 0-3 to output
BSET PTP, #$0F ; Disable 7-Segment Display
; LED
BSET DDRB,$FF
BSET DDRJ,$02
BCLR PTJ,$02
; PBs
BCLR DDRH,$0F
BCLR PTH,$FF ;PORTB as Output
;-------Sound the Buzzer at PTT5
BACK
;-------Get data from DIP switches connected to PORTH and send it to LEDs of PORTB
;how is the speaker supposed to be set up? because when I try the code the speaker does not output any sound.
LDAA PTH ;Get data from DIP Switches of PTH
STAA PORTB ;and send it to PORTB
BSET PTT,%00100000 ;PTT5=1
JSR DELAY
BCLR PTT,%00100000 ;PTT5=0
JSR DELAY
BRA BACK ;Keep toggling buzzer
我的延迟可以吗？我是在正确的轨道还是有更方便的方式来改变音符？
;----------DELAY
DELAY
COMA
TSTA
CMPA #$01
BNE no_note1
PSHA ;Save Reg A on Stack
LDAA #7 ;Change this value to hear
STAA R3 ;different Buzzer sounds
;--1 msec delay. The Serial Monitor works at speed of 48MHz with XTAL=8MHz on Dragon12+ board
;Freq. for Instruction Clock Cycle is 24MHz (1/2 of 48Mhz).
;(1/24MHz) x 10 Clk x240x10=1 msec. Overheads are excluded in this calculation.
L3 LDAA #10
STAA R2
L2 LDAA #200
STAA R1
L1 NOP ;1 Intruction Clk Cycle
NOP ;1
NOP ;1
DEC R1 ;4
BNE L1 ;3
DEC R2 ;Total Instr.Clk=10
BNE L2
DEC R3
BNE L3
PULA ;Restore Reg A
no_note1:
CMPA #$02
BNE no_note2
PSHA ;Save Reg A on Stack
LDAA #3 ;Change this value to hear
STAA R3 ;different Buzzer sounds
;--1 msec delay. The Serial Monitor works at speed of 48MHz with XTAL=8MHz on Dragon12+ board
;Freq. for Instruction Clock Cycle is 24MHz (1/2 of 48Mhz).
;(1/24MHz) x 10 Clk x240x10=1 msec. Overheads are excluded in this calculation.
L9 LDAA #10
STAA R2
L8 LDAA #210
STAA R1
L7 NOP ;1 Intruction Clk Cycle
NOP ;1
NOP ;1
DEC R1 ;4
BNE L7 ;3
DEC R2 ;Total Instr.Clk=10
BNE L8
DEC R3
BNE L9
PULA ;Restore Reg A
no_note2:
CMPA #$04
BNE no_note3
PSHA ;Save Reg A on Stack
LDAA #2 ;Change this value to hear
STAA R3 ;different Buzzer sounds
;--1 msec delay. The Serial Monitor works at speed of 48MHz with XTAL=8MHz on Dragon12+ board
;Freq. for Instruction Clock Cycle is 24MHz (1/2 of 48Mhz).
;(1/24MHz) x 10 Clk x240x10=1 msec. Overheads are excluded in this calculation.
L4 LDAA #15
STAA R2
L5 LDAA #240
STAA R1
L6 NOP ;1 Intruction Clk Cycle
NOP ;1
NOP ;1
DEC R1 ;4
BNE L6 ;3
DEC R2 ;Total Instr.Clk=10
BNE L5
DEC R3
BNE L4
PULA ;Restore Reg A
no_note3:
CMPA #$08
BNE no_note4
PSHA ;Save Reg A on Stack
LDAA #9 ;Change this value to hear
STAA R3 ;different Buzzer sounds
;--1 msec delay. The Serial Monitor works at speed of 48MHz with XTAL=8MHz on Dragon12+ board
;Freq. for Instruction Clock Cycle is 24MHz (1/2 of 48Mhz).
;(1/24MHz) x 10 Clk x240x10=1 msec. Overheads are excluded in this calculation.
L30 LDAA #16
STAA R2
L20 LDAA #249
STAA R1
L10 NOP ;1 Intruction Clk Cycle
NOP ;1
NOP ;1
DEC R1 ;4
BNE L10 ;3
DEC R2 ;Total Instr.Clk=10
BNE L20
DEC R3
BNE L30
;--------------
PULA ;Restore Reg A
no_note4:
RTS
;-------------------
;----------------------------------------------------
; Interrupt Vector
;----------------------------------------------------
; Port H Vector
; $3E4C = $FFCC - $C180
ORG $3E4C
FDB DELAY
FINISH:
NOP
END