i2c communications

hi ,

have anyone achieved an I2C between a master and slave , I have searched on the net but not satisfied .

please anyone have a 2way communication between a master and slave ?

I have written the following code in Proton , and it could move a message from the master to the slave , but i'm incapable of sending a message in the opposite way (from slave to master)

i have another question , where the address of the slave is checked (in hardware or in the software ) because the slave here is accepting every address ?
master

Code ( (Unknown Language)):

1.  
2. Device = 18F4550                                              
3. Xtal = 20  
4. HBStart
5. SSPBUF=0
6.  
7. TXSTA.5=1 ' setting Transmit Enable Bit
8. RCSTA.7=1
9. RCSTA.4=1
10. Hserial_Baud 19200 ' Setting Baud rate
11.  
12.  
13. Symbol SMP = SSPSTAT.7       '1:enable high speed , 0: slow speed
14. Symbol CKE = SSPSTAT.6       '0 always for me
15. Symbol DATA_ADDR = SSPSTAT.5 '[s]1:last byte was data, 0:last byte was address
16. Symbol P = SSPSTAT.4         'I2C Stop detection
17. Symbol S = SSPSTAT.3         'I2C Start detection
18. Symbol R_W = SSPSTAT.2       '[s]1:read 0:write operation [m]1:inprogress 0:may not
19. Symbol UA = SSPSTAT.1        '1:sspadd need update [10bit only]
20. Symbol BF = SSPSTAT.0        'Buffer Full Status flag
21.  
22.  
23. Symbol WCOL  = SSPCON1.7  'Write Collision Detectection
24. Symbol SSPOV = SSPCON1.6  'Receive Overflow Indicator bit
25. Symbol SSPEN = SSPCON1.5  'mssp Enable bit
26. Symbol CKP   = SSPCON1.4  'SCK Release Control bit    ???????????????????????? 1
27. Symbol SSPM3 = SSPCON1.3  '1111:[S10+INT],1110:[S7+INT],1011:[S IDLE]
28. Symbol SSPM2 = SSPCON1.2  '1000:MASTER F/4(SSPADD+1)
29. Symbol SSPM1 = SSPCON1.1  '0111[S10 NO INT]
30. Symbol SSPM0 = SSPCON1.0  '0110[S 7BIT]
31.  
32.  
33. Symbol GCEN    = SSPCON2.7 '[S] General call enable bit
34. Symbol ACKSTAT = SSPCON2.6 '1:ack NOT receied,0:ack received (Master Transmitonly)
35. Symbol ACKDT   = SSPCON2.5 '1:ack 0:nack  (Master Receive mode only)
36. Symbol ACKEN   = SSPCON2.4 'Acknowledge Sequence Enable bit (Master Receive mode only)
37. Symbol RCEN    = SSPCON2.3 '1:Receive Enable 0:disabled (Master receive mode only)
38. Symbol PEN     = SSPCON2.2 'Stop Condition Enable bit (Master mode only)
39. Symbol RSEN    = SSPCON2.1 'Repeated Start Condition Enabled bit (Master mode only)
40. Symbol SEN     = SSPCON2.0 'Start Condition Enabled/Stretch Enabled bit
41.  
42.  
43. Symbol S_GCEN    = SSPCON2.7 '[S] General call enable bit
44. Symbol S_ACKSTAT = SSPCON2.6 'not used in slave
45. Symbol S_ACKDT   = SSPCON2.5 '1:enable address masking,0:disabled
46. Symbol S_ACKEN   = SSPCON2.4 '1:Enable address masking,0:disabled
47. Symbol S_RCEN    = SSPCON2.3 '1:Enable address masking,0:disabled
48. Symbol S_PEN     = SSPCON2.2 '1:Enable address masking,0:disabled
49. Symbol S_RSEN    = SSPCON2.1 '[7bit]1:masking of sspadd<1> [10]1:masking of <0:1>
50. Symbol S_SEN     = SSPCON2.0 'enable clock stretch 0:disable
51.  
52.  
53. Dim i As Byte
54. Dim t As Byte
55. Dim DataOut As String * 30
56. Declare Slow_Bus On
57.  
58. SSPADD  = 49     '100kHz
59. SSPSTAT =  0b00000000
60. SSPCON2 =  0b00001000
61. SSPCON1 =  0b00101000
62. DelayMS 500
63. Output PORTB.7
64.    
65.  
66. i=-1
67. main:
68.  Toggle PORTB.7
69.  DelayMS 100
70.  HBusOut 0b10100000,["master say hello"]
71.  Toggle PORTB.7
72.  DelayMS 500
73. GoTo main
74.  
75. [/S][/S][/s][/s]

slave :

Code ( (Unknown Language)):

1.  
2. Device = 18F4550                                              
3. Xtal = 20  
4. Output PORTB.7
5.  
6. TXSTA.5=1 ' setting Transmit Enable Bit
7. RCSTA.7=1
8. RCSTA.4=1
9. Hserial_Baud 19200 ' Setting Baud rate
10.  
11. LCD_Interface 4
12. LCD_DTPin PORTB.4
13. LCD_RSPin PORTB.3
14. LCD_ENPin PORTB.2
15.  
16.  
17. 'ADCON1=0eh
18. 'Declare Hbus_Bitrate 100
19. Input PORTB.0
20. Input PORTB.1
21.  
22. 'master
23. 'SSPADD = 49
24. SSPADD = 0b11110000
25.  
26. Symbol SMP = SSPSTAT.7       '1:enable high speed , 0: slow speed
27. Symbol CKE = SSPSTAT.6       '0 always for me
28. Symbol DATA_ADDR = SSPSTAT.5 '[s]1:last byte was data, 0:last byte was address
29. Symbol P = SSPSTAT.4         'I2C Stop detection
30. Symbol S = SSPSTAT.3         'I2C Start detection
31. Symbol R_W = SSPSTAT.2       '[s]1:read 0:write operation [m]1:inprogress 0:may not
32. Symbol UA = SSPSTAT.1        '1:sspadd need update [10bit only]
33. Symbol BF = SSPSTAT.0        'Buffer Full Status flag
34.  
35. 'master:
36. 'SSPSTAT = 0b00000000
37. SSPSTAT = 0b00000000
38. Symbol WCOL  = SSPCON1.7  'Write Collision Detectection
39. Symbol SSPOV = SSPCON1.6  'Receive Overflow Indicator bit
40. Symbol SSPEN = SSPCON1.5  'mssp Enable bit
41. Symbol CKP   = SSPCON1.4  'SCK Release Control bit    ???????????????????????? 1
42. Symbol SSPM3 = SSPCON1.3  '1111:[S10+INT],1110:[S7+INT],1011:[S IDLE]
43. Symbol SSPM2 = SSPCON1.2  '1000:MASTER F/4(SSPADD+1)
44. Symbol SSPM1 = SSPCON1.1  '0111[S10 NO INT]
45. Symbol SSPM0 = SSPCON1.0  '0110[S 7BIT]
46. 'MASTER
47. 'SSPCON1=0b00101000
48. SSPCON1=0b00101110
49. Symbol GCEN    = SSPCON2.7 '[S] General call enable bit
50. Symbol ACKSTAT = SSPCON2.6 '1:ack receied,0:ack not received (Master Transmitonly)
51. Symbol ACKDT   = SSPCON2.5 '1:ack 0:nack  (Master Receive mode only)
52. Symbol ACKEN   = SSPCON2.4 'Acknowledge Sequence Enable bit (Master Receive mode only)
53. Symbol RCEN    = SSPCON2.3 '1:Receive Enable 0:disabled (Master receive mode only)
54. Symbol PEN     = SSPCON2.2 'Stop Condition Enable bit (Master mode only)
55. Symbol RSEN    = SSPCON2.1 'Repeated Start Condition Enabled bit (Master mode only)
56. Symbol SEN     = SSPCON2.0 'Start Condition Enabled/Stretch Enabled bit
57. 'SSPCON2=0b000000000      '4
58.  
59. 'slave mode
60. Symbol S_GCEN    = SSPCON2.7 '[S] General call enable bit
61. Symbol S_ACKSTAT = SSPCON2.6 'not used in slave
62. Symbol S_ACKDT   = SSPCON2.5 '1:enable address masking,0:disabled
63. Symbol S_ACKEN   = SSPCON2.4 '1:Enable address masking,0:disabled
64. Symbol S_RCEN    = SSPCON2.3 '1:Enable address masking,0:disabled
65. Symbol S_PEN     = SSPCON2.2 '1:Enable address masking,0:disabled
66. Symbol S_RSEN    = SSPCON2.1 '[7bit]1:masking of sspadd<1> [10]1:masking of <0:1>
67. Symbol S_SEN     = SSPCON2.0 'enable clock stretch 0:disable
68. SSPCON2=0b000000000 'enable stretch
69.  
70. Symbol SSPIF         PIR1.3     'Parallel rad/write finish FLAG
71. Symbol SSPIE         PIE1.3    
72. Symbol GIE_GIEH      INTCON.7   'GLOBAL Interrupts enable
73. Symbol PEIE_GIEL     INTCON.6   'SIDE DEVICES INTERRUPT ENABLE
74.  GIE_GIEH=1
75.  PEIE_GIEL=1
76.  SSPIE=1
77.  
78. On_Interrupt GoTo u:
79. Dim DataIn[30] As Byte
80.  
81. Declare Slow_Bus On
82. SSPADD  = 0b10100000
83. SSPSTAT = 0b00000000
84. SSPCON1 = 0b00111110    
85. SSPCON2 = 0b00000000
86. Dim I As Byte
87. I=-1
88. Dim T As Byte
89. DelayMS 500
90. main:
91.        ' HSerOut [Bin8 SSPADD,"-",Bin8 SSPSTAT,"-",Bin8 SSPCON1,"-",Bin8 SSPCON2, 13]
92.        ' HSerOut ["main-", "-" ,Hex SSPBUF,"-" ,Bin1 SSPIF ,Bin1 BF ,Bin1 SSPOV,Bin1 WCOL,Bin1 S,Bin1 P,13]
93.  
94.         DelayMS 100
95.         HSerOut [Str DataIn,13]
96.         Clear DataIn
97.         DelayMS 100
98.         Toggle PORTB.7
99. GoTo main
100.  
101. u:
102. If SSPIF =1   Then
103.    T= SSPBUF
104.    If S=1 And T <> SSPADD  Then
105.         Inc I
106.         DataIn[I] = T
107.         SSPIF =0
108.         SSPOV = 0
109.         WCOL = 0
110.     End If
111.     If P=1 Then P=0 :I=-1
112.     SSPIF=0
113.     End If  
114.  
115. Context Restore
116.  
117. [/I][/S][/S][/s][/s]

please any help , or code would be appreciable .