To run the embedded test, first prepare your environment:
sudo ./scripts/install-deps
rustup target add thumbv7m-none-eabi
Then:
source ./scripts/env.sh && cargo run --target thumbv7m-none-eabi
Output should be something like:
heap size 524288
secp buf size 66240
Seed WIF: L1HKVVLHXiUhecWnwFYF6L3shkf1E12HUmuZTESvBXUdx3yqVP1D
Address: bc1qpx9t9pzzl4qsydmhyt6ctrxxjd4ep549np9993
Note that this heap size is required because of the amount of stack used by libsecp256k1 when initializing a context.