3.s

这是关于AVR单片机学习的初步开发

	.module _3.c
	.area text(rom, con, rel)
	.dbfile F:\单片机教学\调试程序\实验二舵机串口\3.c
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline -1
	.dbline 9
; //ICC-AVR application builder : 2005-3-29 下午 11:37:28
; // 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  = 0x02;
	ldi R24,2
	out 0x17,R24
	.dbline 12
;  PORTC = 0x7F; //m103 output only
	ldi R24,127
	out 0x15,R24
	.dbline 13
;  DDRC  = 0x00;
	clr R2
	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 timer1_init _timer1_init fV
	.even
_timer1_init::
	.dbline -1
	.dbline 23
; 
; //TIMER1 initialisation - prescale:8
; // WGM: 14) PWM fast, TOP=ICRn
; // desired value: 50Hz
; // actual value: 50.001Hz (0.0%)
; void timer1_init(void)
; {
	.dbline 24
;  TCCR1B = 0x00; //stop
	clr R2
	out 0x2e,R2
	.dbline 25
;  TCNT1H = 0x00; //setup
	out 0x2d,R2
	.dbline 26
;  TCNT1L = 0x00;
	out 0x2c,R2
	.dbline 27
;  OCR1AH = 0x08;
	ldi R24,8
	out 0x2b,R24
	.dbline 28
;  OCR1AL = 0x19;
	ldi R24,25
	out 0x2a,R24
	.dbline 29
;  OCR1BH = 0x6B;
	ldi R24,107
	out 0x29,R24
	.dbline 30
;  OCR1BL = 0xFE;
	ldi R24,254
	out 0x28,R24
	.dbline 31
;  ICR1H  = 0x6B;
	ldi R24,107
	out 0x27,R24
	.dbline 32
;  ICR1L  = 0xFE;
	ldi R24,254
	out 0x26,R24
	.dbline 33
;  TCCR1A = 0xA2;
	ldi R24,162
	out 0x2f,R24
	.dbline 34
;  TCCR1B = 0x1A; //start Timer
	ldi R24,26
	out 0x2e,R24
	.dbline -2
	.dbline 35
; }
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart0_init _uart0_init fV
	.even
_uart0_init::
	.dbline -1
	.dbline 43
; 
; //UART0 initialisation
; // desired baud rate: 9600
; // actual: baud rate:9600 (0.0%)
; // char size: 8 bit
; // parity: Disabled
; void uart0_init(void)
; {
	.dbline 44
;  UCSRB = 0x00; //disable while setting baud rate
	clr R2
	out 0xa,R2
	.dbline 45
;  UCSRA = 0x00;
	out 0xb,R2
	.dbline 46
;  UCSRC = 0x86;
	ldi R24,134
	out 0x20,R24
	.dbline 47
;  UBRRL = 0x47; //set baud rate lo
	ldi R24,71
	out 0x9,R24
	.dbline 48
;  UBRRH = 0x00; //set baud rate hi
	out 0x20,R2
	.dbline 49
;  UCSRB = 0xD8;
	ldi R24,216
	out 0xa,R24
	.dbline -2
	.dbline 50
; }
L3:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 22
	rjmp _uart0_rx_isr
	.area text(rom, con, rel)
	.dbfile F:\单片机教学\调试程序\实验二舵机串口\3.c
	.dbfunc e uart0_rx_isr _uart0_rx_isr fV
;           data -> R16
;           temp -> R18
;           time -> R16,R17
	.even
_uart0_rx_isr::
	st -y,R0
	st -y,R1
	st -y,R2
	st -y,R3
	st -y,R16
	st -y,R17
	st -y,R18
	st -y,R24
	in R0,0x3f
	st -y,R0
	.dbline -1
	.dbline 54
; 
; #pragma interrupt_handler uart0_rx_isr:12
; void uart0_rx_isr(void)
; {
	.dbline 59
;  //uart has received a character in UDR
;   char temp,data;
;  unsigned int time;
;  
;  temp = UDR;
	in R18,0xc
	.dbline 60
;  data = temp;
	mov R16,R18
	.dbline 61
;  time = (data *31>>1)+691;
	ldi R24,31
	mul R24,R16
	movw R16,R0
	asr R17
	ror R16
	subi R16,77  ; offset = 691
	sbci R17,253
	.dbline 62
;  OCR1AH = time >>8;
	movw R2,R16
	mov R2,R3
	clr R3
	out 0x2b,R2
	.dbline 63
;  OCR1AL = time;
	out 0x2a,R16
	.dbline 64
;  UDR =  0x00;
	clr R2
	out 0xc,R2
	.dbline -2
	.dbline 65
; }
L4:
	ld R0,y+
	out 0x3f,R0
	ld R24,y+
	ld R18,y+
	ld R17,y+
	ld R16,y+
	ld R3,y+
	ld R2,y+
	ld R1,y+
	ld R0,y+
	.dbline 0 ; func end
	reti
	.dbsym r data 16 c
	.dbsym r temp 18 c
	.dbsym r time 16 i
	.dbend
	.area vector(rom, abs)
	.org 26
	rjmp _uart0_tx_isr
	.area text(rom, con, rel)
	.dbfile F:\单片机教学\调试程序\实验二舵机串口\3.c
	.dbfunc e uart0_tx_isr _uart0_tx_isr fV
	.even
_uart0_tx_isr::
	.dbline -1
	.dbline 69
; 
; #pragma interrupt_handler uart0_tx_isr:14
; void uart0_tx_isr(void)
; {
	.dbline 71
;  //character has been transmitted
;  ;
	.dbline -2
	.dbline 73
;  
; }
L5:
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline -1
	.dbline 77
; 
; //call this routine to initialise all peripherals
; void init_devices(void)
; {
	.dbline 79
;  //stop errant interrupts until set up
;  CLI(); //disable all interrupts
	cli
	.dbline 80
;  port_init();
	rcall _port_init
	.dbline 81
;  timer1_init();
	rcall _timer1_init
	.dbline 82
;  uart0_init();
	rcall _uart0_init
	.dbline 84
; 
;  MCUCR = 0x00;
	clr R2
	out 0x35,R2
	.dbline 85
;  GICR  = 0x00;
	out 0x3b,R2
	.dbline 86
;  TIMSK = 0x04; //timer interrupt sources
	ldi R24,4
	out 0x39,R24
	.dbline 87
;  SEI(); //re-enable interrupts
	sei
	.dbline -2
	.dbline 89
;  //all peripherals are now initialised
; }
L6:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e main _main fV
	.even
_main::
	.dbline -1
	.dbline 93
; 
; //
; void main(void)
; {
	.dbline 94
;  init_devices();
	rcall _init_devices
L8:
	.dbline 96
L9:
	.dbline 96
	rjmp L8
X0:
	.dbline -2
	.dbline 97
;  //insert your functional code here...
;  while(1);
; }
L7:
	.dbline 0 ; func end
	ret
	.dbend