tests: drivers: gpio-async: Create shell (WIP)

Create a shell app to test gpios.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

tests/drivers/gpio-async/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(gpio_async)
+rust_cargo_application()

tests/drivers/gpio-async/Cargo.toml

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+# Copyright (c) 2024 Linaro LTD
+# SPDX-License-Identifier: Apache-2.0
+
+[package]
+# This must be rustapp for now.
+name = "rustapp"
+version = "0.1.0"
+edition = "2021"
+description = "Test async gpios"
+license = "Apache-2.0 or MIT"
+
+[lib]
+crate-type = ["staticlib"]
+
+[dependencies]
+zephyr = { version = "0.1.0", features = ["time-driver", "executor-zephyr"] }
+log = "0.4.22"
+static_cell = "2.1"
+heapless = "0.8"
+
+[dependencies.embassy-executor]
+version = "0.7.0"
+features = [
+  "log",
+  "task-arena-size-2048",
+]
+
+[dependencies.embassy-futures]
+version = "0.1.1"
+
+[dependencies.embassy-sync]
+version = "0.6.2"
+
+[dependencies.embassy-time]
+version = "0.4.0"
+features = ["tick-hz-10_000"]
+
+[dependencies.critical-section]
+version = "1.2"
+
+[profile.dev]
+opt-level = 1
+
+[profile.release]
+debug = true

tests/drivers/gpio-async/pimoroni_tiny_2040.conf

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+# Copyright (c) 2024 Linaro LTD
+# SPDX-License-Identifier: Apache-2.0
+
+# This board doesn't have a serial console, so use RTT.
+CONFIG_UART_CONSOLE=n
+CONFIG_RTT_CONSOLE=y
+CONFIG_USE_SEGGER_RTT=y

tests/drivers/gpio-async/prj.conf

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+# Copyright (c) 2024 Linaro LTD
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_DEBUG=y
+
+# The default 1k stack isn't large enough for rust string formatting with logging.
+CONFIG_MAIN_STACK_SIZE=4096
+
+CONFIG_RUST=y
+
+CONFIG_RUST_ALLOC=y
+# CONFIG_LOG=y
+
+CONFIG_LOG_BACKEND_RTT=n

tests/drivers/gpio-async/rpi_pico.conf

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+# Copyright (c) 2024 Linaro LTD
+# SPDX-License-Identifier: Apache-2.0
+
+# This board doesn't have a serial console, so use RTT.
+CONFIG_UART_CONSOLE=n
+CONFIG_RTT_CONSOLE=y
+CONFIG_USE_SEGGER_RTT=y

tests/drivers/gpio-async/src/lib.rs

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+// Copyright (c) 2024 Linaro LTD
+// SPDX-License-Identifier: Apache-2.0
+
+#![no_std]
+
+extern crate alloc;
+
+use zephyr::embassy::Executor;
+
+use embassy_executor::Spawner;
+use log::info;
+use static_cell::StaticCell;
+
+static EXECUTOR_MAIN: StaticCell<Executor> = StaticCell::new();
+
+#[no_mangle]
+extern "C" fn rust_main() {
+    unsafe {
+        zephyr::set_logger().unwrap();
+    }
+
+    let executor = EXECUTOR_MAIN.init(Executor::new());
+    executor.run(|spawner| {
+        spawner.spawn(main(spawner)).unwrap();
+    })
+}
+
+#[embassy_executor::task]
+async fn main(spawner: Spawner) {
+    info!("Hello world");
+    let _ = spawner;
+}