Re: [Qemu-devel] hw/arm: add Lego NXT board

[Paolo Bonzini]

Il 13/07/2014 16:20, Alexander Graf ha scritto:
> The problem is that the qemu board I designed is not self-contained. It
> allows the firmware to read/write IO memory in order to read back sensor
> values from the simulated environment and to control actuators. The
> environment simulator is an external program which is connected to
> several qemu instances via posix named pipes using a simple
> communication protocol. Without pipe interaction the emulator can still
> be used to debug NXT firmware images without sensor/actuator interaction.

What does your protocol look like, and what kind of bus do the actual 
sensors and actuators use?

If it is I2C or SPI, having generic i2c-over-chardev or spi-over-chardev 
protocols and devices would be a nice addition to QEMU.

Paolo