Help with i2C eeprom

[mister_e]

Control Byte must be 8 bits... not 9...and you don't have to modify it. I2CREAD/I2CWRITE will handle it for you.

One other thing, not sure of me for that one, I don't know if...
I2CREAD plahplahplah...[MyVar]
wich MyVar is pre-define as a word sized variable is a valide statement. BUT
I2CREAD plahplahplah...[MyVar.LowByte,MyVar.HighByte]
Is a valid statement.

NOW...

DEFINE I2C_SLOW 1 'Use for >8MHz OSC with standard speed devices
DEFINE I2C_SDA PORTB,1 'Data pin for I2C (12-bit core only)
DEFINE I2C_SCL PORTB,4 'Clock pin for I2C (12-bit core only)
SSPSTAT.7=0
SSPSTAT.6=0
SSPCON.5=1
SSPCON.4=1
SSPCON.3=1
SSPCON.2=0
SSPCON.1=1
SSPCON.0=1

Duh???

[Squibcakes]

Thanks Steve,

Got it!

Yeah I was trying to follow the F88 data sheet, eeprom data sheet, and Picpro manual and got all muddled up!

It's suprising that I2CREAD/I2CWRITE handles the control byte, I really thought that I had to manually modify it.

Looks like I2CREAD/I2CWRITE handles the register stuff too. :--)

Okay, well I've attached an updated code listing for anyone interested in programming a I2C EEPROM chip.

(I'm only doing this because this forum keeps putting a banner at the top of the page telling me to Post something!!!)


Cheers
Jared

[mister_e]

I2CREAD/I2CWRITE ae software solution and don't use the internal MSSP module. Easier but slower.. no big deal depending the application

[Squibcakes]

Steve,

You wouldn't be able to give us a few examples of the "other" faster method that uses the MSSP module.

I think this is what I was trying to do in the first place when I became unstuck.

Cheers
J

[mister_e]

I could.. but those MSSP routines (i2C master/Slave, SPI master/Slave) took me awhile to figure and become stable, mature, plahplahplah... There's some nifty code example on the Melabs website.

Do you really need higher speed btw?