file1.asm

单片机学习系统附的实验源代码

;--------------------------------------------------------
; File Created by SDCC : FreeWare ANSI-C Compiler
; Version 2.3.8 Thu Mar 17 22:15:21 2005

;--------------------------------------------------------
	.module file1
	.optsdcc -mmcs51 --model-small
	
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
	.globl _main
	.globl _delay
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
_P0	=	0x0080
_SP	=	0x0081
_DPL	=	0x0082
_DPH	=	0x0083
_PCON	=	0x0087
_TCON	=	0x0088
_TMOD	=	0x0089
_TL0	=	0x008a
_TL1	=	0x008b
_TH0	=	0x008c
_TH1	=	0x008d
_P1	=	0x0090
_SCON	=	0x0098
_SBUF	=	0x0099
_P2	=	0x00a0
_IE	=	0x00a8
_P3	=	0x00b0
_IP	=	0x00b8
_PSW	=	0x00d0
_ACC	=	0x00e0
_B	=	0x00f0
;--------------------------------------------------------
; special function bits 
;--------------------------------------------------------
_P0_0	=	0x0080
_P0_1	=	0x0081
_P0_2	=	0x0082
_P0_3	=	0x0083
_P0_4	=	0x0084
_P0_5	=	0x0085
_P0_6	=	0x0086
_P0_7	=	0x0087
_IT0	=	0x0088
_IE0	=	0x0089
_IT1	=	0x008a
_IE1	=	0x008b
_TR0	=	0x008c
_TF0	=	0x008d
_TR1	=	0x008e
_TF1	=	0x008f
_P1_0	=	0x0090
_P1_1	=	0x0091
_P1_2	=	0x0092
_P1_3	=	0x0093
_P1_4	=	0x0094
_P1_5	=	0x0095
_P1_6	=	0x0096
_P1_7	=	0x0097
_RI	=	0x0098
_TI	=	0x0099
_RB8	=	0x009a
_TB8	=	0x009b
_REN	=	0x009c
_SM2	=	0x009d
_SM1	=	0x009e
_SM0	=	0x009f
_P2_0	=	0x00a0
_P2_1	=	0x00a1
_P2_2	=	0x00a2
_P2_3	=	0x00a3
_P2_4	=	0x00a4
_P2_5	=	0x00a5
_P2_6	=	0x00a6
_P2_7	=	0x00a7
_EX0	=	0x00a8
_ET0	=	0x00a9
_EX1	=	0x00aa
_ET1	=	0x00ab
_ES	=	0x00ac
_EA	=	0x00af
_P3_0	=	0x00b0
_P3_1	=	0x00b1
_P3_2	=	0x00b2
_P3_3	=	0x00b3
_P3_4	=	0x00b4
_P3_5	=	0x00b5
_P3_6	=	0x00b6
_P3_7	=	0x00b7
_RXD	=	0x00b0
_TXD	=	0x00b1
_INT0	=	0x00b2
_INT1	=	0x00b3
_T0	=	0x00b4
_T1	=	0x00b5
_WR	=	0x00b6
_RD	=	0x00b7
_PX0	=	0x00b8
_PT0	=	0x00b9
_PX1	=	0x00ba
_PT1	=	0x00bb
_PS	=	0x00bc
_P	=	0x00d0
_F1	=	0x00d1
_OV	=	0x00d2
_RS0	=	0x00d3
_RS1	=	0x00d4
_F0	=	0x00d5
_AC	=	0x00d6
_CY	=	0x00d7
;--------------------------------------------------------
; overlayable register banks 
;--------------------------------------------------------
	.area REG_BANK_0	(REL,OVR,DATA)
	.ds 8
;--------------------------------------------------------
; internal ram data
;--------------------------------------------------------
	.area DSEG    (DATA)
;--------------------------------------------------------
; overlayable items in internal ram 
;--------------------------------------------------------
	.area	OSEG    (OVR,DATA)
;--------------------------------------------------------
; Stack segment in internal ram 
;--------------------------------------------------------
	.area	SSEG	(DATA)
__start__stack:
	.ds	1

;--------------------------------------------------------
; indirectly addressable internal ram data
;--------------------------------------------------------
	.area ISEG    (DATA)
;--------------------------------------------------------
; bit data
;--------------------------------------------------------
	.area BSEG    (BIT)
;--------------------------------------------------------
; external ram data
;--------------------------------------------------------
	.area XSEG    (XDATA)
;--------------------------------------------------------
; external initialized ram data
;--------------------------------------------------------
	.area XISEG   (XDATA)
;--------------------------------------------------------
; interrupt vector 
;--------------------------------------------------------
	.area CSEG    (CODE)
__interrupt_vect:
	ljmp	__sdcc_gsinit_startup
	reti
	.ds	7
	reti
	.ds	7
	reti
	.ds	7
	reti
	.ds	7
	reti
	.ds	7
	reti
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
__sdcc_gsinit_startup:
	mov	sp,#__start__stack - 1
	lcall	__sdcc_external_startup
	mov	a,dpl
	jz	__sdcc_init_data
	ljmp	__sdcc_program_startup
__sdcc_init_data:
;	_mcs51_genXINIT() start
	mov	r1,#l_XINIT
	mov	a,r1
	orl	a,#(l_XINIT >> 8)
	jz	00003$
	mov	r2,#((l_XINIT+255) >> 8)
	mov	dptr,#s_XINIT
	mov	r0,#s_XISEG
	mov	p2,#(s_XISEG >> 8)
00001$:	clr	a
	movc	a,@a+dptr
	movx	@r0,a
	inc	dptr
	inc	r0
	cjne	r0,#0,00002$
	inc	p2
00002$:	djnz	r1,00001$
	djnz	r2,00001$
	mov	p2,#0xFF
00003$:
;	_mcs51_genXINIT() end
;	_mcs51_genRAMCLEAR() start
	mov	r0,#l_XSEG
	mov	a,r0
	orl	a,#(l_XSEG >> 8)
	jz	00005$
	mov	r1,#((l_XSEG + 255) >> 8)
	mov	dptr,#s_XSEG
	clr     a
00004$:	movx	@dptr,a
	inc	dptr
	djnz	r0,00004$
	djnz	r1,00004$
00005$:	mov	@r0,a
	djnz	r0,00005$
;	_mcs51_genRAMCLEAR() end
	.area GSFINAL (CODE)
	ljmp	__sdcc_program_startup
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME    (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
__sdcc_program_startup:
	lcall	_main
;	return from main will lock up
	sjmp .
;------------------------------------------------------------
;Allocation info for local variables in function 'main'
;------------------------------------------------------------
;k                         Allocated to registers 
;m                         Allocated to registers r2 r3 
;------------------------------------------------------------
;C:/hj51avr/code/c/file1.c:9: void main()
;	-----------------------------------------
;	 function main
;	-----------------------------------------
_main:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;C:/hj51avr/code/c/file1.c:12: P0 = 0;            //关闭数码显示
;     genAssign
	mov	_P0,#0x00
;C:/hj51avr/code/c/file1.c:13: P2 = 0;            //
;     genAssign
	mov	_P2,#0x00
;C:/hj51avr/code/c/file1.c:14: P3_7 = 0;          //关闭蜂鸣器
;     genAssign
	clr	_P3_7
;C:/hj51avr/code/c/file1.c:16: while(1)             //设置一个无限制循环
00102$:
;C:/hj51avr/code/c/file1.c:17: {   m = 254;
;     genAssign
	mov	r2,#0xFE
	mov	r3,#0x00
;C:/hj51avr/code/c/file1.c:18: P1 = m;          //从第一个灯开始显示
;     genAssign
	mov	_P1,#0xFE
;C:/hj51avr/code/c/file1.c:19: for(k=0;k<8;k++)
;     genAssign
	mov	r4,#0x00
	mov	r5,#0x00
00104$:
;     genCmpLt
;     genCmp
	clr	c
	mov	a,r4
	subb	a,#0x08
	mov	a,r5
	xrl	a,#0x80
	subb	a,#0x80
;     genIfxJump
;       Peephole 108    removed ljmp by inverse jump logic
	jnc     00107$
00119$:
;C:/hj51avr/code/c/file1.c:20: {delay(255);
;     genCall
	mov	dpl,#0xFF
	push	ar2
	push	ar3
	push	ar4
	push	ar5
	lcall	_delay
	pop	ar5
	pop	ar4
	pop	ar3
	pop	ar2
;C:/hj51avr/code/c/file1.c:21: m <<=1;
;     genLeftShift
;     genLeftShiftLiteral
;     genlshTwo
	mov	a,r3
	xch	a,r2
	add	a,acc
	xch	a,r2
	rlc	a
	mov	r3,a
;C:/hj51avr/code/c/file1.c:22: P1  = m;        //表示，P1每次向左一位
;     genCast
	mov	_P1,r2
;C:/hj51avr/code/c/file1.c:19: for(k=0;k<8;k++)
;     genPlus
;     genPlusIncr
;	tail increment optimized
	inc	r4
	cjne	r4,#0x00,00104$
	inc	r5
;       Peephole 112.b  changed ljmp to sjmp
	sjmp    00104$
00107$:
;C:/hj51avr/code/c/file1.c:24: m = 128;
;     genAssign
	mov	r2,#0x80
	mov	r3,#0x00
;C:/hj51avr/code/c/file1.c:25: for(k=0;k<8;k++)   //第二次重复
;     genAssign
	mov	r4,#0x00
	mov	r5,#0x00
00108$:
;     genCmpLt
;     genCmp
	clr	c
	mov	a,r4
	subb	a,#0x08
	mov	a,r5
	xrl	a,#0x80
	subb	a,#0x80
;     genIfxJump
;       Peephole 108    removed ljmp by inverse jump logic
	jnc     00102$
00120$:
;C:/hj51avr/code/c/file1.c:26: {delay(255);
;     genCall
	mov	dpl,#0xFF
	push	ar2
	push	ar3
	push	ar4
	push	ar5
	lcall	_delay
	pop	ar5
	pop	ar4
	pop	ar3
	pop	ar2
;C:/hj51avr/code/c/file1.c:27: m >>= 1;
;     genRightShift
;     genSignedRightShift
;     genRightShiftLiteral
;     genrshTwo
	mov	a,r3
	mov	c,acc.7
	rrc	a
	xch	a,r2
	rrc	a
	xch	a,r2
	mov	r3,a
;C:/hj51avr/code/c/file1.c:28: P1 = m;        //表示，P1每次向右一位
;     genCast
	mov	_P1,r2
;C:/hj51avr/code/c/file1.c:25: for(k=0;k<8;k++)   //第二次重复
;     genPlus
;     genPlusIncr
;	tail increment optimized
	inc	r4
	cjne	r4,#0x00,00108$
	inc	r5
;       Peephole 112.b  changed ljmp to sjmp
	sjmp    00108$
00112$:
	ret
;------------------------------------------------------------
;Allocation info for local variables in function 'delay'
;------------------------------------------------------------
;times                     Allocated to registers r2 
;t                         Allocated to registers r3 r4 
;i                         Allocated to registers 
;------------------------------------------------------------
;C:/hj51avr/code/c/file1.c:35: void delay(unsigned char times)
;	-----------------------------------------
;	 function delay
;	-----------------------------------------
_delay:
;     genReceive
	mov	r2,dpl
;C:/hj51avr/code/c/file1.c:37: int t=12000;           //延时倍数
;     genAssign
	mov	r3,#0xE0
	mov	r4,#0x2E
;C:/hj51avr/code/c/file1.c:38: unsigned char i=times;   
;     genAssign
00105$:
;C:/hj51avr/code/c/file1.c:39: for(;i!=0;i--)
;     genCmpEq
	cjne	r2,#0x00,00114$
;       Peephole 112.b  changed ljmp to sjmp
	sjmp    00109$
00114$:
;     genAssign
	mov	ar5,r3
	mov	ar6,r4
00101$:
;C:/hj51avr/code/c/file1.c:40: {for(;t!=0;t--){}}
;     genCmpEq
;       Peephole 241.b  optimized compare
	clr     a
	cjne    r5,#0x00,00115$
	cjne    r6,#0x00,00115$
	inc     a
00115$:
00116$:
	mov	r7,a
;     genAssign
	mov	ar3,r5
	mov	ar4,r6
;     genIfx
	mov	a,r7
;     genIfxJump
;       Peephole 109    removed ljmp by inverse jump logic
	jnz     00107$
00117$:
;     genMinus
;     genMinusDec
;	tail decrement optimized
	dec	r5
	cjne	r5,#0xff,00101$
	dec	r6
;       Peephole 112.b  changed ljmp to sjmp
	sjmp    00101$
00107$:
;C:/hj51avr/code/c/file1.c:39: for(;i!=0;i--)
;     genMinus
;     genMinusDec
	dec	r2
;       Peephole 112.b  changed ljmp to sjmp
	sjmp    00105$
00109$:
	ret
	.area CSEG    (CODE)
	.area XINIT   (CODE)