How to read & write to a 25aa1024 (1 Mbit SPI Bus Serial EEPROM) via 16F88

[wolwil]

First and foremost Thank You, Thank You, Thank You for all of your help guys I really do appreciate it.

Here is the working Code:

' Define serial output pin
SO      con     0 

' Define serial mode                          
T2400   con     0                           

' 2 Byte Address Vars
addr1   var     word                       
addr2   var     word                       
addr3   var     word                        

' Vars for data being written
D1      Var     Byte                        
D2      Var     Byte                      
D3      Var     Byte                        

' Vars for data being read
B1      VAR     BYTE                       
B2      VAR     BYTE                       
B3      VAR     BYTE                        

' Set Data Bytes
D1 = 7                                      
D2 = 6
D3 = 5

' Set Address Bytes
addr1 = 1
addr2 = 2
addr3 = 3

I2CWRITE PORTB.1,PORTB.4,$A0,addr1,[D1]      ' Write a 1 to address 1
PAUSE 10                                     ' Wait 10ms for write to complete
I2CWRITE PORTB.1,PORTB.4,$A0,addr2,[D2]      ' Write a 2 to address 2
PAUSE 10                                     ' Wait 10ms for write to complete
I2CWRITE PORTB.1,PORTB.4,$A0,addr3,[D3]      ' Write a 3 to address 3
PAUSE 10                                     ' Wait 10ms for write to complete

I2CREAD PORTB.1,PORTB.4,$A0,addr1,[B1]      ' Read address 1 into B1
I2CREAD PORTB.1,PORTB.4,$A0,addr2,[B2]      ' Read address 2 into B2
I2CREAD PORTB.1,PORTB.4,$A0,addr3,[B3]      ' Read address 3 into B3

Serout SO,T2400,["Addr",#addr1,":",#B1," and then Addr",#addr2,":",#B2," and then Addr",#addr3,":",#B3,13,10] ' Print B1's Value in DEC

and it's out putting this to Hyperterm:

Addr1:7 and then Addr2:6 and then Addr3:5
Addr1:7 and then Addr2:6 and then Addr3:5
Addr1:7 and then Addr2:6 and then Addr3:5

The problem I had in the beginning was I had the SDA/SCL Pins wrong and I did not have the A2 pin Tied to +5V but after correcting those I had my control byte misunderstood and thats why it would not work. After changing the control byte back to $A0 with the A2 held High and the propper pins chosen for SDA and SCL it now works like it should.

I hope this thread saves everyone a ton of time in the future with these chips I know I sure learned a ton from this little experiance