Posted on July 14, 2016 at 01:38Hello -
I am looking for clarification on why each of the HAL_I2C_Slave_xxxx() transmit and receive functions take a Size parameter. If I were going to call HAL_I2C_Slave_Recieve() (after being write-addressed by the master), how could I possibly ever know how many data bytes the master will end up sending me? Specifying a Size parameter any larger or smaller than required by the master hangs the bus in various ways.
The same goes for HAL_I2C_Slave_Transmit() (after being read-addressed by the master) - There is no way to predict how many bytes the master will clock it for.
Each of the provided HAL_I2C examples are limited since they only use fixed-size transfers.
So what am I missing? What's the Size parameter for? Is this just a limitation of the HAL_I2C driver?
Thanks!
#i2c #hal
