putchar.src

单片机实现消息队列的例子

; .\PUTCHAR.SRC generated from: ..\SourceFile\PUTCHAR.C
; COMPILER INVOKED BY:
;        C:\Program Files\Keil\C51\BIN\C51.EXE ..\SourceFile\PUTCHAR.C LARGE BROWSE DEBUG OBJECTEXTEND PRINT(.\PUTCHAR.lst) SRC(.\PUTCHAR.SRC)

$NOMOD51

NAME	PUTCHAR

P0	DATA	080H
P1	DATA	090H
P2	DATA	0A0H
P3	DATA	0B0H
T0	BIT	0B0H.4
AC	BIT	0D0H.6
T1	BIT	0B0H.5
EA	BIT	0A8H.7
IE	DATA	0A8H
RD	BIT	0B0H.7
ES	BIT	0A8H.4
IP	DATA	0B8H
RI	BIT	098H.0
INT0	BIT	0B0H.2
CY	BIT	0D0H.7
TI	BIT	098H.1
INT1	BIT	0B0H.3
PS	BIT	0B8H.4
SP	DATA	081H
OV	BIT	0D0H.2
WR	BIT	0B0H.6
SBUF	DATA	099H
PCON	DATA	087H
SCON	DATA	098H
TMOD	DATA	089H
TCON	DATA	088H
IE0	BIT	088H.1
IE1	BIT	088H.3
B	DATA	0F0H
ACC	DATA	0E0H
ET0	BIT	0A8H.1
ET1	BIT	0A8H.3
TF0	BIT	088H.5
TF1	BIT	088H.7
RB8	BIT	098H.2
TH0	DATA	08CH
EX0	BIT	0A8H.0
IT0	BIT	088H.0
TH1	DATA	08DH
TB8	BIT	098H.3
EX1	BIT	0A8H.2
IT1	BIT	088H.2
P	BIT	0D0H.0
SM0	BIT	098H.7
TL0	DATA	08AH
SM1	BIT	098H.6
TL1	DATA	08BH
SM2	BIT	098H.5
PT0	BIT	0B8H.1
PT1	BIT	0B8H.3
RS0	BIT	0D0H.3
TR0	BIT	088H.4
RS1	BIT	0D0H.4
TR1	BIT	088H.6
PX0	BIT	0B8H.0
PX1	BIT	0B8H.2
DPH	DATA	083H
DPL	DATA	082H
REN	BIT	098H.4
RXD	BIT	0B0H.0
TXD	BIT	0B0H.1
F0	BIT	0D0H.5
PSW	DATA	0D0H
?PR?_putchar?PUTCHAR SEGMENT CODE 
?BI?_putchar?PUTCHAR SEGMENT BIT OVERLAYABLE 
	PUBLIC	_putchar

	RSEG  ?BI?_putchar?PUTCHAR
?_putchar?BIT:
        bES?041:   DBIT   1
; /***********************************************************************/
; /*  This file is part of the C51 Compiler package                      */
; /*  Copyright KEIL ELEKTRONIK GmbH 1990 - 2002                         */
; /***********************************************************************/
; /*                                                                     */
; /*  PUTCHAR.C:  This routine is the general character output of C51.   */
; /*  You may add this file to a uVision2 project.                       */
; /*                                                                     */
; /*  To translate this file use C51 with the following invocation:      */
; /*     C51 PUTCHAR.C <memory model>                                    */
; /*                                                                     */
; /*  To link the modified PUTCHAR.OBJ file to your application use the  */
; /*  following Lx51 invocation:                                         */
; /*     Lx51 <your object file list>, PUTCHAR.OBJ <controls>            */
; /*                                                                     */
; /***********************************************************************/
; 
; #include <reg51.h>
; 
; #define XON  0x11
; #define XOFF 0x13
; 
; 
; /*
;  * putchar (full version):  expands '\n' into CR LF and handles
;  *                          XON/XOFF (Ctrl+S/Ctrl+Q) protocol
;  */
;  #if 0						/*原为此函数*/
;  TI=1;
; char putchar (char c)  
; {
; if (c == '\n')  
; 	{
;     	if (RI)  
;     		{
;       		if (SBUF == XOFF)  
;       			{
;         		while (SBUF != XON) 
;         			{
;           			RI = 0;
;          			 while (!RI);
;         			}
;         		RI = 0; 
;       			}
;     		}
;     while (!TI);
;     TI = 0;
;     SBUF = 0x0d;                         /* output CR  */
;   	}
; if (RI)  
; 	{
;     	if (SBUF == XOFF)  
;     		{
;       		while (SBUF != XON)
;       			{
;        		RI = 0;
;         		while (!RI);
;       			}
;       		RI = 0; 
;     		}
;   	}
; while (!TI);
; TI = 0;
; return (SBUF = c);
; }
; #endif
; 
; 
; #if 0         /* comment out versions below	老版本，已不用*/
; 
; /*
;  * putchar (basic version): expands '\n' into CR LF
;  */
; char putchar (char c)  
; {
;   if (c == '\n')  
;   	{
;     	while (!TI);
;     	TI = 0;
;     	SBUF = 0x0d;                         /* output CR  */
;   	}
;   while (!TI);
;   TI = 0;
;   return (SBUF = c);
; }
; 
; 
; /*
;  * putchar (mini version): outputs charcter only
;  */
; char putchar (char c)  
; {
;   while (!TI);
;   TI = 0;
;   return (SBUF = c);
; }
; #endif
; 
; #if 1						
; /******************************************************************************************
; *函数名:		putchar
; *参数:			c
; *返回值:		无
; *描述:			为配合UART中断接收而修改的函数，主要修改TI和ES
; *编写:			王绍伟
; *版本信息:		V1.0			2003年8月15日
; ******************************************************************************************/
; char putchar (char c)

	RSEG  ?PR?_putchar?PUTCHAR
_putchar:
	USING	0
			; SOURCE LINE # 108
;---- Variable 'c?040' assigned to Register 'R7' ----
; {
			; SOURCE LINE # 109
; 	bit bES;
; 	bES=ES;			/*r暂存ES内容*/
			; SOURCE LINE # 111
	MOV  	C,ES
	MOV  	bES?041,C
; 	ES=0;			/*r若 想利用TI标志位,就必须先禁止串口中断,否则会冲突*/
			; SOURCE LINE # 112
	CLR  	ES
; 	if (c == '\n') 	/*r如果c为换行*/ 	
			; SOURCE LINE # 113
	MOV  	A,R7
	CJNE 	A,#0AH,?C0001
; 	{
			; SOURCE LINE # 114
; 		SBUF = 0x0d;
			; SOURCE LINE # 115
	MOV  	SBUF,#0DH
?C0002:
; 		while(!TI);	/*r当TI为0时一直在循环*/
			; SOURCE LINE # 116
	JNB  	TI,?C0002
?C0003:
; 		TI=0;	/*r当TI为1时跳出循环,再将TI置为0*/
			; SOURCE LINE # 117
	CLR  	TI
; 	}
			; SOURCE LINE # 118
?C0001:
; 	SBUF = c;
			; SOURCE LINE # 119
	MOV  	SBUF,R7
?C0004:
; 	while(!TI);
			; SOURCE LINE # 120
	JNB  	TI,?C0004
?C0005:
; 	TI=0;
			; SOURCE LINE # 121
	CLR  	TI
; 	ES=bES;			/*待字符发送完毕后,再恢复串口中断允许*/
			; SOURCE LINE # 122
	MOV  	C,bES?041
	MOV  	ES,C
; 	return(1);
			; SOURCE LINE # 123
	MOV  	R7,#01H
; }
			; SOURCE LINE # 124
?C0006:
	RET  	
; END OF _putchar

	END