From 50581ea1fe9bacb3953bd51a6b8029998d269559 Mon Sep 17 00:00:00 2001
From: Per Lindgren <per.lindgren@ltu.se>
Date: Sat, 13 Mar 2021 23:23:14 +0100
Subject: [PATCH] more examples updated

---
 examples/hardware.rs | 61 ++++++++++++++++++++++++++++++++++++++++++++
 examples/late.rs     |  2 +-
 examples/message.rs  | 55 +++++++++++++++++++++++++++++++++++++++
 examples/not-sync.rs | 43 +++++++++++++++++++++++++++++++
 4 files changed, 160 insertions(+), 1 deletion(-)
 create mode 100644 examples/hardware.rs
 create mode 100644 examples/message.rs
 create mode 100644 examples/not-sync.rs

diff --git a/examples/hardware.rs b/examples/hardware.rs
new file mode 100644
index 0000000000..b80600219a
--- /dev/null
+++ b/examples/hardware.rs
@@ -0,0 +1,61 @@
+//! examples/hardware.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use panic_semihosting as _;
+
+#[rtic::app(device = lm3s6965)]
+mod app {
+    use cortex_m_semihosting::{debug, hprintln};
+    use lm3s6965::Interrupt;
+
+    #[resources]
+    struct Resources {
+        #[task_local]
+        #[init(0)]
+        times: u32,
+    }
+
+    #[init]
+    fn init(_: init::Context) -> (init::LateResources, init::Monotonics) {
+        // Pends the UART0 interrupt but its handler won't run until *after*
+        // `init` returns because interrupts are disabled
+        rtic::pend(Interrupt::UART0); // equivalent to NVIC::pend
+
+        hprintln!("init").unwrap();
+
+        (init::LateResources {}, init::Monotonics())
+    }
+
+    #[idle]
+    fn idle(_: idle::Context) -> ! {
+        // interrupts are enabled again; the `UART0` handler runs at this point
+
+        hprintln!("idle").unwrap();
+
+        rtic::pend(Interrupt::UART0);
+
+        debug::exit(debug::EXIT_SUCCESS);
+
+        loop {
+            cortex_m::asm::nop();
+        }
+    }
+
+    #[task(binds = UART0, resources = [times])]
+    fn uart0(cx: uart0::Context) {
+        let times = cx.resources.times;
+        // Safe access to local `static mut` variable
+        *times += 1;
+
+        hprintln!(
+            "UART0 called {} time{}",
+            *times,
+            if *times > 1 { "s" } else { "" }
+        )
+        .unwrap();
+    }
+}
diff --git a/examples/late.rs b/examples/late.rs
index b53daac814..5c10b66fcb 100644
--- a/examples/late.rs
+++ b/examples/late.rs
@@ -1,7 +1,7 @@
 //! examples/late.rs
 
 #![deny(unsafe_code)]
-// #![deny(warnings)]
+#![deny(warnings)]
 #![no_main]
 #![no_std]
 
diff --git a/examples/message.rs b/examples/message.rs
new file mode 100644
index 0000000000..871058d8da
--- /dev/null
+++ b/examples/message.rs
@@ -0,0 +1,55 @@
+//! examples/message.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use panic_semihosting as _;
+
+#[rtic::app(device = lm3s6965, dispatchers = [SSI0])]
+mod app {
+    use cortex_m_semihosting::{debug, hprintln};
+
+    #[resources]
+    struct Resources {
+        #[task_local]
+        #[init(0)]
+        times: u32,
+    }
+
+    #[init]
+    fn init(_: init::Context) -> (init::LateResources, init::Monotonics) {
+        foo::spawn(/* no message */).unwrap();
+
+        (init::LateResources {}, init::Monotonics())
+    }
+
+    #[task(resources = [times])]
+    fn foo(cx: foo::Context) {
+        let times = cx.resources.times;
+
+        hprintln!("foo").unwrap();
+
+        bar::spawn(*times).unwrap();
+        *times += 1;
+    }
+
+    #[task]
+    fn bar(_: bar::Context, x: u32) {
+        hprintln!("bar({})", x).unwrap();
+
+        baz::spawn(x + 1, x + 2).unwrap();
+    }
+
+    #[task]
+    fn baz(_: baz::Context, x: u32, y: u32) {
+        hprintln!("baz({}, {})", x, y).unwrap();
+
+        if x + y > 4 {
+            debug::exit(debug::EXIT_SUCCESS);
+        }
+
+        foo::spawn().unwrap();
+    }
+}
diff --git a/examples/not-sync.rs b/examples/not-sync.rs
new file mode 100644
index 0000000000..f01d40432a
--- /dev/null
+++ b/examples/not-sync.rs
@@ -0,0 +1,43 @@
+//! `examples/not-sync.rs`
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use core::marker::PhantomData;
+use panic_semihosting as _;
+
+pub struct NotSync {
+    _0: PhantomData<*const ()>,
+}
+
+#[rtic::app(device = lm3s6965, dispatchers = [SSI0])]
+mod app {
+    use super::NotSync;
+    use core::marker::PhantomData;
+    use cortex_m_semihosting::debug;
+
+    #[resources]
+    struct Resources {
+        #[init(NotSync { _0: PhantomData })]
+        shared: NotSync,
+    }
+
+    #[init]
+    fn init(_: init::Context) -> (init::LateResources, init::Monotonics) {
+        debug::exit(debug::EXIT_SUCCESS);
+
+        (init::LateResources {}, init::Monotonics())
+    }
+
+    #[task(resources = [&shared])]
+    fn foo(c: foo::Context) {
+        let _: &NotSync = c.resources.shared;
+    }
+
+    #[task(resources = [&shared])]
+    fn bar(c: bar::Context) {
+        let _: &NotSync = c.resources.shared;
+    }
+}