ma16.s

本代码是AVR单片机的完整IIC通信程序

	.module ma16.c
	.area text(rom, con, rel)
	.dbfile D:\avr_prm\ATmege16\ma16.c
	.dbfunc e delay_1ms _delay_1ms fV
;              i -> R16,R17
	.even
_delay_1ms::
	.dbline -1
	.dbline 48
; //ICC-AVR application builder : 2006-10-21 上午 03:16:49
; // Target : M16
; // Crystal: 12.000Mhz
; 
; #include <iom16v.h>
; #include <macros.h>
; 
; #define TRUE 1
; #define FALSE 0
; 
; #define TWI_CMD_MASTER_WRITE 0x10
; #define TWI_CMD_MASTER_READ  0x20
; 
; // Sample TWI transmission states, used in the main application.
; #define SEND_DATA             0x01
; #define REQUEST_DATA          0x02
; #define READ_DATA_FROM_BUFFER 0x03
; #define REQUEST_DATA_two      0x04
; 
; #define Uchar unsigned char
; struct data                     //位定义 
; { 
;     unsigned bit0:1; 
;     unsigned bit1:1; 
;     unsigned bit2:1; 
;     unsigned bit3:1; 
;     unsigned bit4:1; 
;     unsigned bit5:1; 
;     unsigned bit6:1; 
;     unsigned bit7:1; 
; }bit_flag; 
; #define send_busy_flag bit_flag.bit0
; #define GPS_validframe_flag bit_flag.bit1
; #define receive_data_flag bit_flag.bit2
; #define GPS_datalen 70 ///70 个有效数据
; 
; Uchar GPS_status_frame;
; Uchar GPS_receive_buffer[72];
; Uchar GPS_send_buffer[72];
; Uchar GPS_data_conut;
; Uchar GPS_data_start;
; Uchar GPS_data_end;
; 
; Uchar *com_send_ptr;
; Uchar com_datasen_len;
; 
; void delay_1ms(void)                 //8ms延时函数
;   {
	.dbline 50
	clr R16
	clr R17
	xjmp L5
L2:
	.dbline 50
L3:
	.dbline 50
	subi R16,255  ; offset = 1
	sbci R17,255
L5:
	.dbline 50
;    unsigned int i;
;    for (i=0;i<1140;i++);
	cpi R16,116
	ldi R30,4
	cpc R17,R30
	brlo L2
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend
	.dbfunc e delay_nms _delay_nms fV
;              i -> R20,R21
;              n -> R22,R23
	.even
_delay_nms::
	xcall push_gset2
	movw R22,R16
	.dbline -1
	.dbline 54
;   }
;   
; void delay_nms(unsigned int n)       //N*8 ms延时函数
;   {
	.dbline 55
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 56
;    for (i=0;i<n;i++)
	xjmp L10
L7:
	.dbline 57
	xcall _delay_1ms
L8:
	.dbline 56
	subi R20,255  ; offset = 1
	sbci R21,255
L10:
	.dbline 56
	cp R20,R22
	cpc R21,R23
	brlo L7
	.dbline -2
L6:
	xcall pop_gset2
	.dbline 0 ; func end
	ret
	.dbsym r i 20 i
	.dbsym r n 22 i
	.dbend
	.dbfunc e TWI_Act_On_Failure_In_Last_Transmission _TWI_Act_On_Failure_In_Last_Transmission fc
;         status -> R1,R2
;    TWIerrorMsg -> R0
	.even
_TWI_Act_On_Failure_In_Last_Transmission::
	.dbline 0 ; func end
	ret
	.dbsym l status 2 i
	.dbsym l TWIerrorMsg 0 c
	.dbend
	.dbfunc e port_init _port_init fV
	.even
_port_init::
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e uart0_init _uart0_init fV
	.even
_uart0_init::
	.dbline 0 ; func end
	ret
	.dbend
	.area vector(rom, abs)
	.org 44
	jmp _uart0_rx_isr
	.area text(rom, con, rel)
	.dbfile D:\avr_prm\ATmege16\ma16.c
	.area vector(rom, abs)
	.org 52
	jmp _uart0_tx_isr
	.area text(rom, con, rel)
	.dbfile D:\avr_prm\ATmege16\ma16.c
	.dbfunc e uart0_rx_isr _uart0_rx_isr fV
	.even
_uart0_rx_isr::
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e uart0_tx_isr _uart0_tx_isr fV
	.even
_uart0_tx_isr::
	.dbline 0 ; func end
	reti
	.dbend
	.dbfunc e init_devices _init_devices fV
	.even
_init_devices::
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e system_init _system_init fV
	.even
_system_init::
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e send_com_data _send_com_data fV
	.even
_send_com_data::
	.dbline 0 ; func end
	ret
	.dbend