main.s

一个关于AVR单片机的例程

	.module main.c
	.area text(rom, con, rel)
	.dbfile E:\avr\2.5.4\main.c
	.dbfunc e uart0_init _uart0_init fV
	.even
_uart0_init::
	.dbline -1
	.dbline 21
; // ICC-AVR application builder : 2007-5-25 21:35:24
; // Target : M16
; // Crystal: 7.3728Mhz
; // 用途：演示getchar(),getchar(),printf()等函数的使用。
; // 作者：古欣
; // AVR与虚拟仪器 http://www.avrvi.com
; // 使用7.3728M外部晶振，注意：请短接跳线JP2的1和2，电源跳线连接3.3V或者5V
; // 串口使用JP4的连接方法：1和2短接，使用RS232，请注意查看跳线旁边的示意图
; // 开发板连接：无连线
; 
; #include <iom16v.h>
; #include <macros.h>
; #include <stdio.h>
; 
; //UART0 initialize
; // desired baud rate: 9600
; // actual: baud rate:9600 (0.0%)
; // char size: 8 bit
; // parity: Disabled
; void uart0_init(void)
; {
	.dbline 22
;  UCSRB = 0x00; //disable while setting baud rate
	clr R2
	out 0xa,R2
	.dbline 23
;  UCSRA = 0x00;
	out 0xb,R2
	.dbline 24
;  UCSRC = BIT(URSEL) | 0x06;
	ldi R24,134
	out 0x20,R24
	.dbline 25
;  UBRRL = 0x2F; //set baud rate lo
	ldi R24,47
	out 0x9,R24
	.dbline 26
;  UBRRH = 0x00; //set baud rate hi
	out 0x20,R2
	.dbline 27
;  UCSRB = 0x18;
	ldi R24,24
	out 0xa,R24
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e delay _delay fV
;              i -> R16
;              j -> R18
	.even
_delay::
	.dbline -1
	.dbline 31
; }
; 
; void delay(void)
; {
	.dbline 32
;  unsigned char i=0,j=0;
	clr R16
	.dbline 32
	clr R18
	.dbline 33
;  for(i=1;i!=0;i++)
	ldi R16,1
	xjmp L6
L3:
	.dbline 34
;  {
	.dbline 35
;   for(j=1;j!=0;j++)
	ldi R18,1
	xjmp L10
L7:
	.dbline 36
L8:
	.dbline 35
	inc R18
L10:
	.dbline 35
	tst R18
	brne L7
	.dbline 37
L4:
	.dbline 33
	inc R16
L6:
	.dbline 33
	tst R16
	brne L3
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 c
	.dbsym r j 18 c
	.dbend
	.area lit(rom, con, rel)
L12:
	.byte 32,32,32,32,32,32,32,32,32,32,32,0
	.area text(rom, con, rel)
	.dbfile E:\avr\2.5.4\main.c
	.dbfunc e main _main fV
;              i -> <dead>
;              c -> R20
;              b -> R20
;           temp -> y+1
;              a -> y+0
	.even
_main::
	sbiw R28,13
	.dbline -1
	.dbline 41
;   ;
;  }
; }
; 
; void main(void)
; {
	.dbline 43
;  unsigned char i;
;  unsigned char temp[]="           ";
	ldi R24,<L12
	ldi R25,>L12
	movw R30,R28
	adiw R30,1
	ldi R16,12
	ldi R17,0
	st -y,R31
	st -y,R30
	st -y,R25
	st -y,R24
	xcall asgncblk
	.dbline 44
;  unsigned char a=0,b=0,c=0;
	clr R2
	std y+0,R2
	.dbline 44
	clr R20
	.dbline 44
	.dbline 45
;  uart0_init();                 //初始化串口
	xcall _uart0_init
	.dbline 46
;  printf("www.avrvi.com\r\n");  //输出字符串
	ldi R16,<L13
	ldi R17,>L13
	xcall _printf
	xjmp L15
L14:
	.dbline 57
	.dbline 58
	xcall _delay
	.dbline 59
	movw R18,R28
	ldi R16,<L17
	ldi R17,>L17
	xcall _scanf
	.dbline 60
	ldd R18,y+0
	clr R19
	ldi R16,<L18
	ldi R17,>L18
	xcall _printf
	.dbline 61
L15:
	.dbline 56
	xjmp L14
X0:
	.dbline -2
L11:
	adiw R28,13
	.dbline 0 ; func end
	ret
	.dbsym l i 1 c
	.dbsym r c 20 c
	.dbsym r b 20 c
	.dbsym l temp 1 A[12:12]c
	.dbsym l a 0 c
	.dbend
	.area data(ram, con, rel)
	.dbfile E:\avr\2.5.4\main.c
L18:
	.blkb 5
	.area idata
	.byte 37,'d,13,10,0
	.area data(ram, con, rel)
	.dbfile E:\avr\2.5.4\main.c
L17:
	.blkb 3
	.area idata
	.byte 37,'d,0
	.area data(ram, con, rel)
	.dbfile E:\avr\2.5.4\main.c
L13:
	.blkb 16
	.area idata
	.byte 'w,'w,'w,46,'a,'v,'r,'v,'i,46,'c,'o,'m,13,10,0
	.area data(ram, con, rel)
	.dbfile E:\avr\2.5.4\main.c