I am trying to get it to work as an I2C slave device and this is the only way I got it working.
Now I am using an interrupt on the falling edge of SDA and checking STL to see if I received the start condition.
What I can't figure out is how to have an I2C ISR that also gives access to read/write bit

Hey! I'm trying to figure out how to setup i2c interrupts with the following function (i2c_isr_register). I am not sure what to put mainly in the arguments, `arg`, `intr_alloc_flags` and `handle`.