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📄 i2c.src

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; .\I2C.SRC generated from: I2C.c
; COMPILER INVOKED BY:
;        D:\Program Files\keil c\C51\BIN\C51.EXE I2C.c BROWSE DEBUG OBJECTEXTEND SRC(.\I2C.SRC)

$NOMOD51

NAME	I2C

P0	DATA	080H
P1	DATA	090H
I2C_SCL	BIT	090H.0
P2	DATA	0A0H
P3	DATA	0B0H
T0	BIT	0B0H.4
AC	BIT	0D0H.6
T1	BIT	0B0H.5
T2	BIT	090H.0
EA	BIT	0A8H.7
IE	DATA	0A8H
EXF2	BIT	0C8H.6
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
RCAP2H	DATA	0CBH
PS	BIT	0B8H.4
SP	DATA	081H
T2EX	BIT	090H.1
OV	BIT	0D0H.2
RCAP2L	DATA	0CAH
C_T2	BIT	0C8H.1
WR	BIT	0B0H.6
RCLK	BIT	0C8H.5
TCLK	BIT	0C8H.4
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
CP_RL2	BIT	0C8H.0
ACC	DATA	0E0H
ET0	BIT	0A8H.1
ET1	BIT	0A8H.3
TF0	BIT	088H.5
ET2	BIT	0A8H.5
TF1	BIT	088H.7
TF2	BIT	0C8H.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
TH2	DATA	0CDH
P	BIT	0D0H.0
SM0	BIT	098H.7
TL0	DATA	08AH
SM1	BIT	098H.6
TL1	DATA	08BH
SM2	BIT	098H.5
TL2	DATA	0CCH
PT0	BIT	0B8H.1
PT1	BIT	0B8H.3
RS0	BIT	0D0H.3
PT2	BIT	0B8H.5
TR0	BIT	088H.4
RS1	BIT	0D0H.4
TR1	BIT	088H.6
TR2	BIT	0C8H.2
PX0	BIT	0B8H.0
PX1	BIT	0B8H.2
line1	BIT	0A0H.4
line2	BIT	0A0H.5
DPH	DATA	083H
line3	BIT	0A0H.6
line4	BIT	0A0H.7
DPL	DATA	082H
EXEN2	BIT	0C8H.3
REN	BIT	098H.4
T2CON	DATA	0C8H
RXD	BIT	0B0H.0
TXD	BIT	0B0H.1
F0	BIT	0D0H.5
I2C_SDA	BIT	090H.1
PSW	DATA	0D0H
?PR?_t_lp?I2C        SEGMENT CODE 
?PR?I2C_START?I2C    SEGMENT CODE 
?PR?I2C_STOP?I2C     SEGMENT CODE 
?PR?I2C_CK?I2C       SEGMENT CODE 
?PR?_I2C_OUT?I2C     SEGMENT CODE 
?BI?_I2C_OUT?I2C     SEGMENT BIT OVERLAYABLE 
?PR?I2C_IN?I2C       SEGMENT CODE 
?PR?_I2C_WRITE?I2C   SEGMENT CODE 
?DT?_I2C_WRITE?I2C   SEGMENT DATA OVERLAYABLE 
?PR?_I2C_READ?I2C    SEGMENT CODE 
?DT?_I2C_READ?I2C    SEGMENT DATA OVERLAYABLE 
?PR?saveConfig?I2C   SEGMENT CODE 
?PR?restoreConfig?I2C                    SEGMENT CODE 
	EXTRN	DATA (scanshu)
	PUBLIC	restoreConfig
	PUBLIC	saveConfig
	PUBLIC	_I2C_READ
	PUBLIC	_I2C_WRITE
	PUBLIC	I2C_IN
	PUBLIC	_I2C_OUT
	PUBLIC	I2C_CK
	PUBLIC	I2C_STOP
	PUBLIC	I2C_START
	PUBLIC	_t_lp

	RSEG  ?DT?_I2C_WRITE?I2C
?_I2C_WRITE?BYTE:
device_address?647:   DS   1
word_address?648:   DS   1
   I2C_DATA?649:   DS   1

	RSEG  ?DT?_I2C_READ?I2C
?_I2C_READ?BYTE:
device_address?751:   DS   1
word_address?752:   DS   1

	RSEG  ?BI?_I2C_OUT?I2C
?_I2C_OUT?BIT:
          j?444:   DBIT   1
; #include <reg52.h>
; #include "lyj.h"
; #include "I2C.h"
; 
; #ifdef I2C_SUPPORT
; #define t_lp_n 2                //I2C 读写单步延时
;                                 //22.1184MHZ时，12机械周期情况下，t_lp_n  =2可用
; #define I2C_WRITE_DELAY 250	//I2C 写完需要一个10ms的延时；应根据晶体的震荡频率适当调节
;                                 //22.1184MHZ时，12机械周期情况下，I2C_WRITE_DELAY =250可用
; sbit I2C_SCL = P1^0;
; sbit I2C_SDA = P1^1;
; //sbit I2C_WP  = P3^5;
; 
; void t_lp(UINT i)

	RSEG  ?PR?_t_lp?I2C
L?0036:
	USING	0
L?0037:
	CLR  	I2C_SCL
	MOV  	R7,#02H
	MOV  	R6,#00H
L?0038:
	LCALL	_t_lp
	SETB 	I2C_SCL
_t_lp:
	USING	0
			; SOURCE LINE # 14
;---- Variable 'i?040' assigned to Register 'R6/R7' ----
; {
			; SOURCE LINE # 15
; 	UINT j;
; 	for(j = 0 ; j< i ; j++);
			; SOURCE LINE # 17
;---- Variable 'j?041' assigned to Register 'R4/R5' ----
	CLR  	A
	MOV  	R5,A
	MOV  	R4,A
?C0001:
	CLR  	C
	MOV  	A,R5
	SUBB 	A,R7
	MOV  	A,R4
	SUBB 	A,R6
	JNC  	?C0004
	INC  	R5
	CJNE 	R5,#00H,?C0033
	INC  	R4
?C0033:
	SJMP 	?C0001
; }
			; SOURCE LINE # 18
?C0004:
	RET  	
; END OF _t_lp

; //I2C START 过程
; void I2C_START()

	RSEG  ?PR?I2C_START?I2C
I2C_START:
	USING	0
			; SOURCE LINE # 20
; {
			; SOURCE LINE # 21
; 	I2C_SCL = 0;
			; SOURCE LINE # 22
	CLR  	I2C_SCL
; 	t_lp(t_lp_n);
			; SOURCE LINE # 23
	MOV  	R7,#02H
	MOV  	R6,#00H
	LCALL	_t_lp
; 	I2C_SDA = 1;
			; SOURCE LINE # 24
	SETB 	I2C_SDA
; 	t_lp(t_lp_n);
			; SOURCE LINE # 25
; 	I2C_SCL = 1;
			; SOURCE LINE # 26
; 	t_lp(t_lp_n);
			; SOURCE LINE # 27
	LCALL	L?0038
; 	I2C_SDA = 0;
			; SOURCE LINE # 28
	CLR  	I2C_SDA
; 	t_lp(t_lp_n);
			; SOURCE LINE # 29
	LCALL	_t_lp
; 	I2C_SCL = 0;  
			; SOURCE LINE # 30
	CLR  	I2C_SCL
; 	t_lp(t_lp_n);
			; SOURCE LINE # 31
	LJMP 	_t_lp
; END OF I2C_START

; }
; //I2C stop 过程
; void I2C_STOP()

	RSEG  ?PR?I2C_STOP?I2C
I2C_STOP:
	USING	0
			; SOURCE LINE # 34
; {
			; SOURCE LINE # 35
; 	I2C_SCL = 0;
			; SOURCE LINE # 36
	CLR  	I2C_SCL
; 	t_lp(t_lp_n);
			; SOURCE LINE # 37
	MOV  	R7,#02H
	MOV  	R6,#00H
	LCALL	_t_lp
; 	I2C_SDA = 0;
			; SOURCE LINE # 38
	CLR  	I2C_SDA
; 	t_lp(t_lp_n);
			; SOURCE LINE # 39
; 	I2C_SCL = 1;
			; SOURCE LINE # 40
; 	t_lp(t_lp_n);
			; SOURCE LINE # 41
	LCALL	L?0038
; 	I2C_SDA = 1;
			; SOURCE LINE # 42
	SETB 	I2C_SDA
; 	t_lp(t_lp_n);
			; SOURCE LINE # 43
	LJMP 	_t_lp
; END OF I2C_STOP

; }
; 
; void I2C_CK()

	RSEG  ?PR?I2C_CK?I2C
I2C_CK:
	USING	0
			; SOURCE LINE # 46
; {
			; SOURCE LINE # 47
; 	I2C_SCL = 0;
			; SOURCE LINE # 48
; 	t_lp(t_lp_n);
			; SOURCE LINE # 49
; 	I2C_SCL = 1;
			; SOURCE LINE # 50
; 	t_lp(t_lp_n);
			; SOURCE LINE # 51
	LCALL	L?0036
; 	I2C_SCL = 0; 
			; SOURCE LINE # 52
	CLR  	I2C_SCL
; 	t_lp(t_lp_n);
			; SOURCE LINE # 53
	LJMP 	_t_lp
; END OF I2C_CK

; }
;  
; bit I2C_OUT(UCHAR i2c_sda_out)

	RSEG  ?PR?_I2C_OUT?I2C
_I2C_OUT:
	USING	0
			; SOURCE LINE # 56
;---- Variable 'i2c_sda_out?442' assigned to Register 'R3' ----
	MOV  	R3,AR7
; { 
			; SOURCE LINE # 57
; 	UCHAR i; 
; 	bit j;   
; 	for(i=0;i<8;i++)
			; SOURCE LINE # 60
;---- Variable 'i?443' assigned to Register 'R2' ----
	CLR  	A
	MOV  	R2,A
?C0008:
; 	{	    
			; SOURCE LINE # 61
; 		I2C_SDA = (i2c_sda_out << i)&0x80;
			; SOURCE LINE # 62
	MOV  	A,R3
	MOV  	R0,AR2
	INC  	R0
	SJMP 	?C0035
?C0034:
	CLR  	C
	RLC  	A
?C0035:
	DJNZ 	R0,?C0034
	RLC  	A
	MOV  	I2C_SDA,C
; 		I2C_CK();
			; SOURCE LINE # 63
	LCALL	I2C_CK
; 	}  
			; SOURCE LINE # 64
	INC  	R2
	CJNE 	R2,#08H,?C0008
?C0009:
; 	I2C_SCL = 0;
			; SOURCE LINE # 65
; 	t_lp(t_lp_n);
			; SOURCE LINE # 66
; 	I2C_SCL = 1;
			; SOURCE LINE # 67
; 	t_lp(t_lp_n);
			; SOURCE LINE # 68
	LCALL	L?0036
; 	j = I2C_SDA;
			; SOURCE LINE # 69
	MOV  	C,I2C_SDA
	MOV  	j?444,C
; 	I2C_SCL = 0;
			; SOURCE LINE # 70
	CLR  	I2C_SCL
; 	t_lp(t_lp_n);
			; SOURCE LINE # 71
	LCALL	_t_lp
; 	return j;  
			; SOURCE LINE # 72
	MOV  	C,j?444
; }
			; SOURCE LINE # 73
?C0011:
	RET  	
; END OF _I2C_OUT

; 
; UCHAR I2C_IN()

	RSEG  ?PR?I2C_IN?I2C
I2C_IN:
	USING	0
			; SOURCE LINE # 75
;---- Variable 'j?546' assigned to Register 'R3' ----
; { 
			; SOURCE LINE # 76
; 	UCHAR i; 
; 	UCHAR j;   
; 	for(i=0;i<8;i++)
			; SOURCE LINE # 79
;---- Variable 'i?545' assigned to Register 'R2' ----
	CLR  	A
	MOV  	R2,A
?C0012:
; 	{
			; SOURCE LINE # 80
; 		I2C_SCL = 0;
			; SOURCE LINE # 81
; 		t_lp(t_lp_n);
			; SOURCE LINE # 82
; 		I2C_SCL = 1;
			; SOURCE LINE # 83
; 		t_lp(t_lp_n); 
			; SOURCE LINE # 84
	LCALL	L?0037
; 		
; 		if (I2C_SDA == 1) 
			; SOURCE LINE # 86
	MOV  	A,R3
	ADD  	A,ACC
	JNB  	I2C_SDA,?C0015
; 			j = (j<<1) | 0x01;
			; SOURCE LINE # 87
	ORL  	A,#01H
	MOV  	R3,A
	SJMP 	?C0016
?C0015:
; 		else
12

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