2020-07-05 22:03:15 +08:00
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.. _AVR-System-emulator:
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AVR System emulator
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-------------------
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Use the executable ``qemu-system-avr`` to emulate a AVR 8 bit based machine.
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These can have one of the following cores: avr1, avr2, avr25, avr3, avr31,
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avr35, avr4, avr5, avr51, avr6, avrtiny, xmega2, xmega3, xmega4, xmega5,
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xmega6 and xmega7.
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As for now it supports few Arduino boards for educational and testing purposes.
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These boards use a ATmega controller, which model is limited to USART & 16-bit
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2020-09-17 15:50:22 +08:00
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timer devices, enough to run FreeRTOS based applications (like
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2020-07-05 22:03:15 +08:00
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https://github.com/seharris/qemu-avr-tests/blob/master/free-rtos/Demo/AVR_ATMega2560_GCC/demo.elf
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).
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Following are examples of possible usages, assuming demo.elf is compiled for
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AVR cpu
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2020-08-12 23:53:04 +08:00
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- Continuous non interrupted execution::
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qemu-system-avr -machine mega2560 -bios demo.elf
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- Continuous non interrupted execution with serial output into telnet window::
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qemu-system-avr -M mega2560 -bios demo.elf -nographic \
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2021-02-17 03:10:24 +08:00
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-serial tcp::5678,server=on,wait=off
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2020-08-12 23:53:04 +08:00
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and then in another shell::
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telnet localhost 5678
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2020-09-17 15:50:22 +08:00
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- Debugging with GDB debugger::
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2020-08-12 23:53:04 +08:00
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qemu-system-avr -machine mega2560 -bios demo.elf -s -S
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and then in another shell::
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avr-gdb demo.elf
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and then within GDB shell::
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target remote :1234
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- Print out executed instructions (that have not been translated by the JIT
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compiler yet)::
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qemu-system-avr -machine mega2560 -bios demo.elf -d in_asm
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