In the current develop branch, IC_TX_BUFFER_DEPTH is defined as 32 [here](https://github.com/raspberrypi/pico-sdk/blob/develop/src/rp2_common/hardware_i2c/include/hardware/i2c.h#L260): ```c const size_t IC_TX_BUFFER_DEPTH = 32; ``` and as 16 [here](https://github.com/raspberrypi/pico-sdk/blob/develop/src/rp2040/hardware_structs/include/hardware/structs/i2c.h#L132): ```c // IC_TX_BUFFER_DEPTH ................ 16 ``` I think 16 is the correct value.
