Question about i2c communication between crazyflie 2.0 and other chips

[cduan2]

Hi,

This is Chenghao. I am currently working with the crazyflie 2.0 and trying to write the code establishing an I2C connection between it and a raspberry pi zero. I wonder how should I call my code in the main and do I need to modify the current code you have for the I2C.

Also suggestions are welcome.

Thanks for your help.
Chenghao

[ataffanel]

Hi,

I would suggest you write a deck driver, this is the easiest way to get your code to be initialized and run by the Crazyflie.

There is already a couple of deck driver using I2C for communicating with sensors that you could look for example: https://github.com/bitcraze/crazyflie-firmware/blob/master/src/deck/drivers/src/vl53l0x.c.

Though, if your plan is to have the raspberry pi as master and the Crazyflie as slave it might require a lot of work to get it to play nice with the Crazyflie STM32 I2C implementation: the I2C port on Crazyflie is already setup as master to read the I2C memory that is on the same bus, you would need to reconfigure the bus in slave.

Unless your plan is to have the raspberry pi as slave, it would be much easier to use a serial port between the raspberry pie and the Crazyflie.

If you post on the forum (https://forum.bitcraze.io/) with a bit more information about what you want to achieve, we could come up with some mode guidance about how to go forward.