From 2643368980826df45cb38ddc3dbf39665efaa950 Mon Sep 17 00:00:00 2001
From: chrysn <chrysn@fsfe.org>
Date: Fri, 13 Oct 2023 13:09:59 +0200
Subject: [PATCH] gpio: Add test

---
 tests/gpio/Cargo.toml | 17 +++++++++++++++++
 tests/gpio/Makefile   |  8 ++++++++
 tests/gpio/src/lib.rs | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 tests/gpio/Cargo.toml
 create mode 100644 tests/gpio/Makefile
 create mode 100644 tests/gpio/src/lib.rs

diff --git a/tests/gpio/Cargo.toml b/tests/gpio/Cargo.toml
new file mode 100644
index 00000000..ffd6e853
--- /dev/null
+++ b/tests/gpio/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "riot-wrappers-test-gpio"
+version = "0.1.0"
+authors = ["Christian Amsüss <chrysn@fsfe.org>"]
+edition = "2021"
+publish = false
+
+[lib]
+crate-type = ["staticlib"]
+
+[profile.release]
+panic = "abort"
+
+[dependencies]
+riot-wrappers = { version = "*", features = [ "set_panic_handler", "panic_handler_format" ] }
+riot-sys = "*"
+embedded-hal = "0.2.4"
diff --git a/tests/gpio/Makefile b/tests/gpio/Makefile
new file mode 100644
index 00000000..2210600b
--- /dev/null
+++ b/tests/gpio/Makefile
@@ -0,0 +1,8 @@
+# name of your application
+APPLICATION = riot-wrappers-test-gpio
+APPLICATION_RUST_MODULE = riot_wrappers_test_gpio
+BASELIBS += $(APPLICATION_RUST_MODULE).module
+FEATURES_REQUIRED += rust_target
+FEATURES_REQUIRED += periph_gpio
+
+include $(RIOTBASE)/Makefile.include
diff --git a/tests/gpio/src/lib.rs b/tests/gpio/src/lib.rs
new file mode 100644
index 00000000..b1d13f04
--- /dev/null
+++ b/tests/gpio/src/lib.rs
@@ -0,0 +1,35 @@
+#![no_std]
+
+use riot_wrappers::gpio::{InputMode, OutputMode, GPIO};
+use riot_wrappers::println;
+use riot_wrappers::riot_main;
+
+use embedded_hal::digital::v2::{InputPin, OutputPin, PinState};
+
+riot_main!(main);
+
+fn main() {
+    let (out_port, out_pin, in_port, in_pin, in_mode) = match riot_wrappers::BOARD {
+        // Won't work -- currently, native GPIO don't do anything (but let's not panic already)
+        "native" => (0, 0, 0, 1, InputMode::In),
+        // 0.17 is LED1, 0.13 is button 1
+        "nrf52dk" => (0, 17, 0, 13, InputMode::InPullUp),
+
+        // Better safe than drive pins that were not supposed to be driven
+        _ => panic!("For this board, no GPIO pins were deemed safe to reconfigure."),
+    };
+    let mut p_out = GPIO::from_port_and_pin(out_port, out_pin)
+        .expect("Out pin does not exist")
+        .configure_as_output(OutputMode::Out)
+        .expect("Out pin could not be configured");
+    let p_in = GPIO::from_port_and_pin(in_port, in_pin)
+        .expect("In pin does not exist")
+        .configure_as_input(in_mode)
+        .expect("In pin could not be configured");
+
+    loop {
+        let value = p_in.is_high().unwrap();
+        println!("Read GPIO value {}, writing it to the out port", value);
+        p_out.set_state(if value { PinState::High } else { PinState::Low });
+    }
+}