uart.s

AVR系列被广泛应用的单片机MEGA8开发(原理图)及例程

	.module Uart.c
	.area text(rom, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
	.dbfunc e uart0_RX_Enable _uart0_RX_Enable fV
	.even
_uart0_RX_Enable::
	.dbline -1
	.dbline 7
; 
; #include <iom8v.h>
; #include <macros.h>
; #include "Uart.h"
; 
; void uart0_RX_Enable(void)
; {
	.dbline 8
; UCSRB = 0xE8; //disable while setting baud rate
	ldi R24,232
	out 0xa,R24
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart0_RX_Disable _uart0_RX_Disable fV
	.even
_uart0_RX_Disable::
	.dbline -1
	.dbline 11
; }
; void uart0_RX_Disable(void)
; {
	.dbline 12
; UCSRB = 0xF8; //disable while setting baud rate
	ldi R24,248
	out 0xa,R24
	.dbline -2
L2:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart0_init _uart0_init fV
	.even
_uart0_init::
	.dbline -1
	.dbline 16
; }
; 
; void uart0_init(void)
; {
	.dbline 17
; UCSRB = 0x00; //disable while setting baud rate
	clr R2
	out 0xa,R2
	.dbline 18
;  UCSRA = 0x00;
	out 0xb,R2
	.dbline 19
;  UCSRC = 0x86;
	ldi R24,134
	out 0x20,R24
	.dbline 20
;  UBRRL = 0x0B; //set baud rate lo
	ldi R24,11
	out 0x9,R24
	.dbline 21
;  UBRRH = 0x00; //set baud rate hi
	out 0x20,R2
	.dbline 22
;  UCSRB = 0xF8; 
	ldi R24,248
	out 0xa,R24
	.dbline -2
L3:
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 22
	rjmp _uart0_rx_isr
	.area text(rom, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
	.dbfunc e uart0_rx_isr _uart0_rx_isr fV
;       tempdata -> R20
	.even
_uart0_rx_isr::
	rcall push_lset
	rcall push_gset1
	.dbline -1
	.dbline 26
	.dbline 27
	in R20,0xc
	.dbline 28
	mov R16,R20
	rcall _PutChar
	.dbline 31
	ldi R16,<L5
	ldi R17,>L5
	rcall _PutStr
	.dbline 32
	ldi R16,<L6
	ldi R17,>L6
	rcall _PutStr
	.dbline 34
	cpi R20,73
	brne L7
	.dbline 35
	.dbline 35
	cli
	.dbline 36
	clr R2
	out 0xa,R2
	.dbline 37
	JMP 0x1C00
	.dbline 38
L7:
	.dbline -2
L4:
	rcall pop_gset1
	rcall pop_lset
	.dbline 0 ; func end
	reti
	.dbsym r tempdata 20 c
	.dbend
	.area vector(rom, abs)
	.org 24
	rjmp _uart0_udre_isr
	.area text(rom, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
	.dbfunc e uart0_udre_isr _uart0_udre_isr fV
	.even
_uart0_udre_isr::
	.dbline -1
	.dbline 43
;  }
; #pragma interrupt_handler uart0_rx_isr:12
; void uart0_rx_isr(void)
; { unsigned char tempdata;
;    tempdata = UDR; /* read the received data */
;    PutChar( tempdata);
;  //  PutChar(0x0a);
;  //  PutChar(0x0d);
;   PutStr("富友勤 ATMEGA8 DEMO");
;  PutStr("Start IAP");
; 
;    if(tempdata=='I')
;    	{ CLI(); 
;    	  UCSRB = 0x00; 
;           asm("JMP 0x1C00") ;
;    	}
; 	}
; 
; #pragma interrupt_handler uart0_udre_isr:13
; void uart0_udre_isr(void)
; {
	.dbline -2
L9:
	.dbline 0 ; func end
	reti
	.dbend
	.area vector(rom, abs)
	.org 26
	rjmp _uart0_tx_isr
	.area text(rom, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
	.dbfunc e uart0_tx_isr _uart0_tx_isr fV
	.even
_uart0_tx_isr::
	.dbline -1
	.dbline 50
;  //character transferred to shift register so UDR is now empty
;  
; }
; 
; #pragma interrupt_handler uart0_tx_isr:14
; void uart0_tx_isr(void)
; {
	.dbline -2
L10:
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e PutStr _PutStr fI
;              s -> R16,R17
	.even
_PutStr::
	.dbline -1
	.dbline 55
; }
; 
; 
; int PutStr(char *s)
; {
	rjmp L13
X0:
	.dbline 57
; while(*s)
; {while ( !(UCSRA & (1<<UDRE)) )
L15:
	.dbline 58
L16:
	.dbline 57
	sbis 0xb,5
	rjmp L15
	.dbline 59
	movw R30,R16
	ldd R2,z+0
	out 0xc,R2
	.dbline 61
	subi R16,255  ; offset = 1
	sbci R17,255
	.dbline 62
L13:
	.dbline 56
	movw R30,R16
	ldd R2,z+0
	tst R2
	brne L16
L18:
	.dbline 66
L19:
	.dbline 65
; 		; /* wait for empty transmit buffer */
; UDR = *s; /* start transmittion */
; 
; s++;
; }
; 
; 
; while ( !(UCSRA & (1<<UDRE)) )
	sbis 0xb,5
	rjmp L18
	.dbline 67
; 		; /* wait for empty transmit buffer */
; UDR = 0x0a; /* start transmittion */
	ldi R24,10
	out 0xc,R24
	.dbline 69
; //while ( !(UCSRA & (1<<UDRE)) )
; 		; /* wait for empty transmit buffer */
	.dbline 71
; //UDR = 0x0d; /* start transmittion */
; return 1;
	ldi R16,1
	ldi R17,0
	.dbline -2
L11:
	.dbline 0 ; func end
	ret
	.dbsym r s 16 pc
	.dbend
	.dbfunc e PutInt _PutInt fV
;        intdata -> R0,R1
	.even
_PutInt::
	.dbline 0 ; func end
	ret
	.dbsym l intdata 0 i
	.dbend
	.dbfunc e PutChar _PutChar fV
;              c -> R0
	.even
_PutChar::
	.dbline 0 ; func end
	ret
	.dbsym l c 0 c
	.dbend
	.area data(ram, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
L6:
	.blkb 10
	.area idata
	.byte 'S,'t,'a,'r,'t,32,'I,'A,'P,0
	.area data(ram, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c
L5:
	.blkb 20
	.area idata
	.byte 184,187,211,209,199,218,32,'A,'T,'M,'E,'G,'A,56,32,'D
	.byte 'E,'M,'O,0
	.area data(ram, con, rel)
	.dbfile D:\Datasheet\Atmel\FROMJI~1\AVR_Demo\m8\SoftWare\Uart.c