Patch per Arduino e Ethernet Library in Debian Sid


Posted: ottobre 2nd, 2012 | Author: Francesco Apollonio | Filed under: Arduino, Bug, Embedded, Linux, Senza categoria | Tags: , , , , , , , , , | No Comments »


Premetto che questo è uno sviluppo di quanto ho scritto nel precedente post, ma comunque ricapitoliamo per completezza.

Ho avuto un problema programmando Arduino Uno con Ethernet Shield per cercare di fare una richiesta DNS. In particolare la board non riusciva a ritrovare l’indirizzo IP del server richiesto, al suo posto infatti veniva ritornato l’indirizzo 0.0.0.0.

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Read and write RAM physical addresses from Linux user space


Posted: aprile 22nd, 2012 | Author: Francesco Apollonio | Filed under: ARM, C/C++, English, Linux, Programmazione | Tags: , , , , , | No Comments »


Ok, this is another trick I learned working on my project.

I’ve a QEMU arm machine and a simulation outside them. QEMU shares his RAM (in the future I’ll write about this) with the simulator so I want to unlock the simulation (that is waiting for a 1 at the address 0x0FF8000) writing the specified value on that address using an application in user space inside the VM.

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