Can I increase the I2C maximum packet length?

[The Altruist]

From the I2CMulti.h

Code: Select all

#define I2C_MAX_BUF_SIZE  (64)  // Size allocated to input and output buffers in slave mode I2C

So... is this unyielding unchangeable law or can I pad this a little?

[lgitlitz]

You should be able to make this as large as you want. The buffer is defined as a global so you do not need to worry about any stack overflows, just running out of RAM. You need to recompile the system files after you change the buffer size

[The Altruist]

Hey, thanks a lot! I was worried when I saw 64 as a limit for a few other I2C devices. Also, where's the "Index" menu I've seen mentioned before?

[lgitlitz]

Hey, thanks a lot! I was worried when I saw 64 as a limit for a few other I2C devices. Also, where's the "Index" menu I've seen mentioned before?

Not sure what the Index menu is, where did you see this?

[The Altruist]

Wasn't sure how to describe it, but I found it. I had to Re-index the project so the Macro Expansion for I2C_MAX_BUF_SIZE would be right. Right click on the project. Of course.

EDIT: Yeah, that was my ticket in the system. Thanks for that!