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USART 的代码
usart.s
.module usart.c
.area text(rom, con, rel)
.dbfile usart.c
.dbfunc e usart_init _usart_init fV
.even
_usart_init::
.dbline -1
.dbline 5
; /*上位机发送一个数据，下位返回相同的数据,在中断中接收数据，并发送数据*/
; #incl
usart.dbg
IMAGECRAFT DEBUG FORMAT
VERSION 1.1
CPU AVR
FILE usart.c
FUNC usart_init 96 fV
BLOCK 5 96
LINE 5 96
LINE 6 96
LINE 7 9A
LINE 8 9E
LINE 9 A2
BLOCKEND 0 A6
FUNCEND A6
FUNC usart_receive A8
usart.o
XL
H 2 areas 3 global symbols
M usart.c
A text size 38 flags 0
dbfile usart.c
dbfunc e usart_init 0 fV
dbline FFFFFFFF 0
dbline 5 0
dbline 6 0
dbline 7 4
dbline 8 8
dbline 9 C
dbline FFFFF
usart.lis
.module usart.c
.area text(rom, con, rel)
0000 .dbfile usart.c
0000 .dbfunc e usart_init _usart_init fV
usart._c
/*上位机发送一个数据，下位返回相同的数据,在中断中接收数据，并发送数据*/
#include
#include
void usart_init(void)
{
UBRR=0X33;//fosc=8mhz,波特率9600
UCSRA=0X20;
UCSRC=0X86;
UCSRB=0X98;
}
#pragma
usart.mp
NOTE: AVR Code addresses are word addresses
All other addresses (including ones in FLASH) are byte addresses
Area Addr Size Decimal Bytes (Attributes)
----------
usart.lst
__start:
__text_start:
002A E5CF LDI R28,0x5F
002B E0D4 LDI R29,4
002C BFCD OUT 0x3D,R28
002D BFDE OUT 0x3E,R29
002E 51C0 SUBI R28,0x10
002F 40D
usart.hex
:040000000C942A0032
:04002C000C945400DC
:14005400CFE5D4E0CDBFDEBFC051D0400AEA08830024E0E67D
:14006800F0E010E0E036F10711F00192FBCF0083E4E5F0E03C
:14007C00A0E6B0E010E0E435F10721F0C89531960D92F9CFBD
usart.c
/*上位机发送一个数据，下位返回相同的数据,在中断中接收数据，并发送数据*/
#include
#include
void usart_init(void)
{
UBRR=0X33;//fosc=8mhz,波特率9600
UCSRA=0X20;
UCSRC=0X86;
UCSRB=0X98;
}
#pragma