AN3291 Rev 2 4/2007- I2C Module on HCXXXX Series- Wheres the ACK Check?

[YeOldeBDM]

Refering to Example 15, ISR Code for MC9S08QG8 and ......, I do not see any code that checks for I2C ACK from the slave  when the micro sends data to the slave. Did the author leave this out, or am I misunderstanding something?

However, in the code using polling (yecch), I do see appropriate checks for ACKs from the slave.

I guess the real question is...if the author left ack checking out of interrupt driven method, well, was there some hardware problem that the author chose to avoid?

[peg]

Hi,

I have never used I2C, but I might be soon. So I can't offer any help.

But is this issue related to these:

http://forums.freescale.com/freescale/board/message?board.id=8BITCOMM&message.id=5765
http://forums.freescale.com/freescale/board/message?board.id=8BITCOMM&message.id=5581

[bigmac]

Hello,

Here is an additional thread associated with AN3291.  However, it is possible that the issue raised may already have been addressed by Rev 2.

http://forums.freescale.com/freescale/board/message?board.id=8BITCOMM&message.id=5108

Regards,

Mac