fix(spi): add busy loop waiting for tx finish #226

	name: CI build

	on:
	push:
	branches: ["master"]
	paths-ignore:
	- "*.md"
	pull_request:
	branches: ["master"]
	paths-ignore:
	- "*.md"

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Use nightly Rust
	# lock to 2024-08-23 and wait for embassy-executor to be updated
	run: \|
	rustup default nightly-2024-08-23
	rustup component add rust-src
	rustup target add riscv32imafc-unknown-none-elf
	- name: Build Only
	run: \|
	for d in $(ls -1 ./examples); do
	if [ -f "./examples/$d/Cargo.toml" ]; then
	(cd ./examples/$d && cargo build --release)
	fi
	done

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