INA228: checksum error from reg0B[bit 0]=1

Hello Ken,

Interesting....  according to the datasheet: "Memory status — Indicated by the MEMSTAT bit, monitors the health of the device non-volatile trim memory. This bit should always read '1' when the device is operating properly."

So, it looks like there must be something wrong...  The rest of your communication seems to be working properly, so I don't think it's likely that it's a communication error, but it wouldn't hurt to look at a scope to double check that the communication on the line is what is expected.

I have a few questions about this as well:

1. Do you always see 0x0000 for register 0x0B, or is it sometimes different? 
2. Are you able to get the conversion ready flag to show? 
   1. Maybe you could try putting the device in different modes, such at triggered conversions to see if you can get the conversion ready flag to show.
   2. If/when you get the conversion ready flag shown, check to see if the MEMSTAT bit is still 0.
3. Have you seen this problem on multiple devices with your setup, or have you only tried the one device? 
   1. (This can help us determine if it's a setup/firmware issue or an individual device issue)

Another interesting thing I see is that you are getting zero's for all your results registers.  I would think there would be at least some noise or variation in the results, even if you have the current powered down. (Plus, you should see something in the temperature register at a minimum).