From b4de9b3ed59818e5e6c236763f96a941ceb5ffc6 Mon Sep 17 00:00:00 2001
From: Mirabellensaft <tanks@ferrous-systems.com>
Date: Mon, 13 Mar 2023 18:33:02 +0100
Subject: [PATCH] add solution and template for uarte_enable

---
 down-the-stack/apps/src/bin/uarte_enable.rs   | 31 ++----------
 .../apps/src/bin/uarte_enable_solution.rs     | 48 +++++++++++++++++++
 2 files changed, 53 insertions(+), 26 deletions(-)
 create mode 100644 down-the-stack/apps/src/bin/uarte_enable_solution.rs

diff --git a/down-the-stack/apps/src/bin/uarte_enable.rs b/down-the-stack/apps/src/bin/uarte_enable.rs
index 2f46d79..0f380e4 100644
--- a/down-the-stack/apps/src/bin/uarte_enable.rs
+++ b/down-the-stack/apps/src/bin/uarte_enable.rs
@@ -3,7 +3,8 @@
 
 use cortex_m::asm;
 use cortex_m_rt::entry;
-use dk_pac::UARTE0;
+
+// ^^^^ import the PAC here
 
 // this imports `down-the-stack/apps/lib.rs` to retrieve our global logger + panicking-behavior
 use apps as _;
@@ -15,23 +16,8 @@ fn main() -> ! {
     // to enable more verbose logs, go to your `Cargo.toml` and set defmt logging levels
     // to `defmt-trace` by changing the `default = []` entry in `[features]`
 
-    // takes ownership of the nRF52840-DK peripherals
-    let periph = dk_pac::Peripherals::take().unwrap();
-    let uarte = periph.UARTE0;
-
-    uarte_enabled(&uarte);
-
-    // enable the UART0 peripheral the safe way
-    uarte.enable.write(|w| w.enable().enabled());
-
-    uarte_enabled(&uarte);
-
-    // disable the UART0 peripheral by writing 0 directly into the register -- the unsafe way
-    unsafe {
-        uarte.enable.write(|w| w.bits(0x00 as u32));
-    }
-
-    uarte_enabled(&uarte);
+    // Your code goes here...
+   
 
     // this program does not `exit`; use Ctrl+C to terminate it
     loop {
@@ -39,11 +25,4 @@ fn main() -> ! {
     }
 }
 
-// Reads the bits in the UART0 register and prints `enabled` or `disabled`
-fn uarte_enabled(uarte: &UARTE0) {
-    if uarte.enable.read().bits() != 0 {
-        defmt::println!("Uarte0 is enabled");
-    } else {
-        defmt::println!("Uarte0 is disabled");
-    }
-}
+// The helper function goes here...
diff --git a/down-the-stack/apps/src/bin/uarte_enable_solution.rs b/down-the-stack/apps/src/bin/uarte_enable_solution.rs
new file mode 100644
index 0000000..ef29275
--- /dev/null
+++ b/down-the-stack/apps/src/bin/uarte_enable_solution.rs
@@ -0,0 +1,48 @@
+#![no_main]
+#![no_std]
+
+use cortex_m::asm;
+use cortex_m_rt::entry;
+use dk_pac::UARTE0;
+
+// this imports `down-the-stack/apps/lib.rs` to retrieve our global logger + panicking-behavior
+use apps as _;
+use defmt;
+use defmt_rtt as _; // global logger
+
+#[entry]
+fn main() -> ! {
+    // to enable more verbose logs, go to your `Cargo.toml` and set defmt logging levels
+    // to `defmt-trace` by changing the `default = []` entry in `[features]`
+
+    // takes ownership of the nRF52840-DK peripherals
+    let periph = dk_pac::Peripherals::take().unwrap();
+    let uarte = periph.UARTE0;
+
+    is_uarte_enabled(&uarte);
+
+    // enable the UART0 peripheral the safe way
+    uarte.enable.write(|w| w.enable().enabled());
+
+    is_uarte_enabled(&uarte);
+
+    // disable the UART0 peripheral by writing 0 directly into the register -- the unsafe way
+    unsafe {
+        uarte.enable.write(|w| w.bits(0x00 as u32));
+    }
+
+    is_uarte_enabled(&uarte);
+
+    // this program does not `exit`; use Ctrl+C to terminate it
+    loop {
+        asm::nop();
+    }
+}
+
+fn is_uarte_enabled(uarte: &UARTE0) {
+    if uarte.enable.read().enable().is_enabled() {
+        defmt::println!("Uarte0 is enabled");
+    } else {
+        defmt::println!("Uarte0 is disabled");
+    }
+}
\ No newline at end of file