I2CRead problem

[richard]

can we see the whole transaction , an i2c read needs to do a write to set address and then a restart to read . you have not shown enough

[Ioannis]

Thank you Richard. Will do that this evening.

I tried byte read, word read, page read, Nothing works and all var's are just a zero.

The chip is a 16F1939 but I am sure this does not matter. Logic analyzer shows I2C activity either way.

Edit:

OK, now that is weird. On a 45K22 works just fine. On 1939 not...

Ioannis

[Ioannis]

I am very embarrassed...

I forgot completely ANSELD and ANSELE when testing it...

Ioannis

[richard]

I forgot completely ANSELD

Another good reason to migrate to xc8 , mcc gives all pin settings/names and function in one easy to use screen

[Ioannis]

It is not easy to me. I detest C lanquage. Despite my efforts so far, I did not managed to flip over.

It looks very cryptic...

Ioannis

[sayzer]

Using ready-to-use tools to adjust the registers as we need, kills our ability of playing with them, and lowers the understanding of the hardware registers.

Manual setting as much as possible is a good way of self developing, I think.

[richard]

Using ready-to-use tools to adjust the registers as we need, kills our ability of playing with them, and lowers the understanding of the hardware registers.

setting pin function is pic 101 stuff , but essential to get correct .not much programming skill in there once a basic understanding is reached

Manual setting as much as possible is a good way of self developing, I think.

would you not use dt_ints or PicMultiCalc
if there's a good tool use it ,I think