uart.s

这是关于AVR单片机学习的初步开发

	.module uart.c
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\alf\MYDOCU~1\开发板\调试程序\uart\uart.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 9
; //ICC-AVR application builder : 2005-3-8 下午 09:54:40
; // Target : M8
; // Crystal: 11.059Mhz
; 
; #include <iom8v.h>
; #include <macros.h>
; 
; void port_init(void)
; {
	.dbline 10
;  PORTB = 0xFF;
	ldi R24,255
	out 0x18,R24
	.dbline 11
;  DDRB  = 0x00;
	clr R2
	out 0x17,R2
	.dbline 12
;  PORTC = 0x7F; //m103 output only
	ldi R24,127
	out 0x15,R24
	.dbline 13
;  DDRC  = 0x00;
	out 0x14,R2
	.dbline 14
;  PORTD = 0xFF;
	ldi R24,255
	out 0x12,R24
	.dbline 15
;  DDRD  = 0x00;
	out 0x11,R2
	.dbline -2
	.dbline 16
; }
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart0_init _uart0_init fV
	.even
_uart0_init::
	.dbline -1
	.dbline 24
; 
; //UART0 initialisation
; // desired baud rate: 9600
; // actual: baud rate:9600 (0.0%)
; // char size: 8 bit
; // parity: Disabled
; void uart0_init(void)
; {
	.dbline 25
;  UCSRB = 0x00; //disable while setting baud rate
	clr R2
	out 0xa,R2
	.dbline 26
;  UCSRA = 0x00;
	out 0xb,R2
	.dbline 27
;  UCSRC = 0x86;
	ldi R24,134
	out 0x20,R24
	.dbline 28
;  UBRRL = 0x47; //set baud rate lo
	ldi R24,71
	out 0x9,R24
	.dbline 29
;  UBRRH = 0x00; //set baud rate hi
	out 0x20,R2
	.dbline 30
;  UCSRB = 0x98;
	ldi R24,152
	out 0xa,R24
	.dbline -2
	.dbline 31
; }
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 22
	rjmp _uart0_rx_isr
	.area text(rom, con, rel)
	.dbfile C:\DOCUME~1\alf\MYDOCU~1\开发板\调试程序\uart\uart.c
	.dbfunc e uart0_rx_isr _uart0_rx_isr fV
;           temp -> R16
	.even
_uart0_rx_isr::
	st -y,R16
	in R16,0x3f
	st -y,R16
	.dbline -1
	.dbline 35
; 
; #pragma interrupt_handler uart0_rx_isr:12
; void uart0_rx_isr(void)
; {
	.dbline 38
;  //uart has received a character in UDR
;  char temp;
;  temp = UDR;
	in R16,0xc
	.dbline 39
;  UDR = temp;
	out 0xc,R16
	.dbline -2
	.dbline 40
; }
L3:
	ld R16,y+
	out 0x3f,R16
	ld R16,y+
	.dbline 0 ; func end
	reti
	.dbsym r temp 16 c
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 44
; 
; //call this routine to initialise all peripherals
; void init_devices(void)
; {
	.dbline 46
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 47
;  port_init();
	rcall _port_init
	.dbline 48
;  uart0_init();
	rcall _uart0_init
	.dbline 50
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 51
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 52
;  TIMSK = 0x00; //timer interrupt sources
	out 0x39,R2
	.dbline 53
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
	.dbline 55
;  //all peripherals are now initialised
; }
L4:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 59
; 
; //
; void main(void)
; {
	.dbline 60
;  init_devices();
	rcall _init_devices
L6:
	.dbline 62
L7:
	.dbline 62
	rjmp L6
X0:
	.dbline -2
	.dbline 63
;  //insert your functional code here...
;  while(1);
; }
L5:
	.dbline 0 ; func end
	ret
	.dbend