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Update building blink example as now it's simpler #49

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Update building blink example as now it's simpler #49

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5 changes: 2 additions & 3 deletions src/003.3-example-building-blink.md
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Expand Up @@ -7,13 +7,12 @@ for AVR.
# fetch and prepare the blink crate (only needs to be done once).
$ git clone https://github.com/avr-rust/blink.git
$ cd blink
$ rustup override set nightly

# Configure the 'ruduino' crate with a MCU frequency of 16MHz
$ export AVR_CPU_FREQUENCY_HZ=16000000

# compile the blink crate to an ELF file targeting atmega328p.
$ cargo build -Z build-std=core --target avr-atmega328p.json --release
# Compile the blink crate to an ELF file targeting atmega328p (target is configured in .cargo/config.toml).
$ cargo build --release
```

After compilation, the final ELF executable will be available at `target/avr-atmega328p/release/blink.elf`, ready to be flashed to a device
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