esp idf i2c legacy driver issue about ubxlib HOT 5 OPEN

Hi there: it is indeed on the TODO list; we will probably combine it with moving forward to ESP-IDF 5.2. We can't drop support for the old I2C driver of course, so it will make the ESP-IDF port-layer code a bit messy, and it will need to be done under a compilation switch so as not to break existing users.

Suggest we leave this issue open and then we can updated it when done.

from ubxlib.

I've just begun implementing against the new ESP-IDF I2C API, however it seems to be missing one vital feature: it does not permit I2C stop bits to be suppressed. In the old API one had full control over this; we need it in order to determine the number of bytes available in the GNSS device (write 0xFD followed by no stop bit to the GNSS device, read two bytes and that gives you the amount of data it has buffered). Unless I've missed something...?

I have raised a feature request on ESP-IDF: espressif/esp-idf#13952

from ubxlib.