Internships/ProjectIdeas/I2CPassthrough

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I2C Passthrough

Summary: Implement I2C bus passthrough on Linux hosts so that an emulated Raspberry Pi or micro:bit board can talk to real I2C devices.

QEMU emulates I2C devices in software but currently cannot pass through real I2C devices from the host to the guest. It would be useful to access real I2C devices from inside the guest, for example for developers writing and testing software under QEMU on their computer.

The project consists of the following tasks:

  • Implement -object i2c-bus-passthrough,adapter=N,id=my-i2c-bus
  • Add i2c-bus-passthrough support to at least 1 existing emulated I2C controller
  • Implement micro:bit TWI controller emulation on the nRF51 system-on-chip

This project will allow you to learn about the I2C bus and how to write device emulation code in QEMU. You will enjoy it if you like working with physical hardware.

Links:

Details:

  • Skill level: intermediate
  • Language: C
  • Mentor: Paolo Bonzini <pbonzini@redhat.com> ("bonzini" on IRC), Stefan Hajnoczi <stefanha@redhat.com> ("stefanha" on IRC)
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