delay_7.37m.s

网卡驱动程序

	.module Delay_7.37M.c
	.area text(rom, con, rel)
	.dbfile E:\__test\_RTL8019_M128_struct_Test\Delay_7.37M.c
	.dbfunc e Delay_1us _Delay_1us fV
	.even
_Delay_1us::
	.dbline -1
	.dbline 9
; #include <macros.h>
; #include "Delay_7.37M.h"
; 
; /*-----------------------------------------------------------------------
; 延时函数
; 系统时钟：7.3728M
; -----------------------------------------------------------------------*/
; void Delay_1us(void)     //1us+
; {
	.dbline 10
;    asm("nop");
	nop
	.dbline -2
L1:
	.dbline 0 ; func end
	ret
	.dbend
	.dbfunc e Delay_nus _Delay_nus fV
;              i -> R10,R11
;              n -> R20,R21
	.even
_Delay_nus::
	xcall push_xgset300C
	movw R20,R16
	.dbline -1
	.dbline 14
; }
; 
; void Delay_nus(unsigned int n)       //N us延时函数
; {
	.dbline 15
;    unsigned int i=0;
	clr R10
	clr R11
	xjmp L4
L3:
	.dbline 17
;    while (n--)
;       Delay_1us();
	xcall _Delay_1us
L4:
	.dbline 16
	movw R2,R20
	subi R20,1
	sbci R21,0
	tst R2
	brne L3
	tst R3
	brne L3
X0:
	.dbline -2
L2:
	.dbline 0 ; func end
	xjmp pop_xgset300C
	.dbsym r i 10 i
	.dbsym r n 20 i
	.dbend
	.dbfunc e Delay_nus_Count _Delay_nus_Count fV
;              n -> R16,R17
	.even
_Delay_nus_Count::
	.dbline -1
	.dbline 25
;    
; }  
; 
; //通过int型计数的N us延时函数
; //延时计算：t_delay = 6 * nt + 14t
; //延时范围：n>=0, n<=65535 (即14t - 393224t )  //8M时,是1.5us - 49153us
; void Delay_nus_Count(unsigned int n)    //8M时, 0.75us+
; { 
	xjmp L8
L7:
	.dbline 27
;    while(n) 
;       n--;    
	subi R16,1
	sbci R17,0
L8:
	.dbline 26
	cpi R16,0
	cpc R16,R17
	brne L7
X1:
	.dbline -2
L6:
	.dbline 0 ; func end
	ret
	.dbsym r n 16 i
	.dbend
	.dbfunc e Delay_1ms _Delay_1ms fV
;              i -> R16,R17
	.even
_Delay_1ms::
	.dbline -1
	.dbline 32
; } 
; 
; 
; void Delay_1ms(void)                 //1ms延时函数
; {
	.dbline 34
;    unsigned int i;
;    for (i=0;i<1052;i++); 
	clr R16
	clr R17
	xjmp L14
L11:
	.dbline 34
L12:
	.dbline 34
	subi R16,255  ; offset = 1
	sbci R17,255
L14:
	.dbline 34
	cpi R16,28
	ldi R30,4
	cpc R17,R30
	brlo L11
X2:
	.dbline -2
L10:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend
	.dbfunc e Delay_nms _Delay_nms fV
;              i -> R20,R21
;              n -> R10,R11
	.even
_Delay_nms::
	xcall push_xgset300C
	movw R10,R16
	.dbline -1
	.dbline 38
; }
;   
; void Delay_nms(unsigned int n)       //N ms延时函数
; {
	.dbline 39
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 40
;    for (i=0;i<n;i++)
	xjmp L19
L16:
	.dbline 41
;    Delay_1ms();
	xcall _Delay_1ms
L17:
	.dbline 40
	subi R20,255  ; offset = 1
	sbci R21,255
L19:
	.dbline 40
	cp R20,R10
	cpc R21,R11
	brlo L16
X3:
	.dbline -2
L15:
	.dbline 0 ; func end
	xjmp pop_xgset300C
	.dbsym r i 20 i
	.dbsym r n 10 i
	.dbend
	.dbfunc e Delay_1ms_Preci _Delay_1ms_Preci fV
;              i -> R16,R17
	.even
_Delay_1ms_Preci::
	.dbline -1
	.dbline 50
; }
; 
; //精确1ms延时函数
; //延时时间计算: t_delay= 3t + 1t + 1t + n*6t + ( (int(n/256) + 1) * 2t -1t) + 4t
; //即: t_delay= n*6t + int(n/128)t + 10t 
; //计数计算(1ms)：n= (1000 * f - 10) * 128 / 769 
; //              n= (1000 * 8 -10 ) * 128 /769 = 1329.93 (取整为n=1330, 再把1330去验证延时时间t_delay的计算)
; void Delay_1ms_Preci(void)                 
; {
	.dbline 52
;    unsigned int i;
;    i=1226;  //7.3728M
	ldi R16,1226
	ldi R17,4
L21:
	.dbline 54
;    while (i--) 
;       ;
L22:
	.dbline 53
	movw R2,R16
	subi R16,1
	sbci R17,0
	tst R2
	brne L21
	tst R3
	brne L21
X4:
	.dbline -2
L20:
	.dbline 0 ; func end
	ret
	.dbsym r i 16 i
	.dbend
	.dbfunc e Delay_nms_Preci _Delay_nms_Preci fV
;              i -> R20,R21
;              n -> R10,R11
	.even
_Delay_nms_Preci::
	xcall push_xgset300C
	movw R10,R16
	.dbline -1
	.dbline 59
; }
; 
; //N ms精确延时函数
; void Delay_nms_Preci(unsigned int n)       
; {
	.dbline 60
;    unsigned int i=0;
	clr R20
	clr R21
	.dbline 61
;    for (i=0;i<n;i++)
	xjmp L28
L25:
	.dbline 62
;    Delay_1ms_Preci();
	xcall _Delay_1ms_Preci
L26:
	.dbline 61
	subi R20,255  ; offset = 1
	sbci R21,255
L28:
	.dbline 61
	cp R20,R10
	cpc R21,R11
	brlo L25
X5:
	.dbline -2
L24:
	.dbline 0 ; func end
	xjmp pop_xgset300C
	.dbsym r i 20 i
	.dbsym r n 10 i
	.dbend
; }
;