Update examples

Author: usbalbin

README.md

@@ -10,21 +10,29 @@ A set of tools to plot values from the target to graph in rerun with minimal per
 #![no_main]
 
 use cortex_m_rt::entry;
-use panic_halt as _;
+use probe_plotter::{make_metric, make_setting};
 
 #[entry]
 fn main() -> ! {
-    use probe_plotter::make_metric;
-    let mut sawtooth = make_metric!(SAWTOOTH: i32 = 42, "(x / 10) % 100").unwrap();
-    let mut sine = make_metric!(SINE: i32 = 42, "100 * sin(2 * pi * x / 4000)").unwrap();
+    let mut sawtooth = make_metric!(SAWTOOTH: i32 = 42, "(SAWTOOTH / 10) % 100").unwrap();
+    let mut sine = make_metric!(SINE: i32 = 42, "100 * sin(2 * pi * SINE / 4000)").unwrap();
+
+    let mut setting_roundtrip =
+        make_metric!(SETTING_ROUNDTRIP: i8 = 0, "SETTING_ROUNDTRIP").unwrap();
+
+    // Allow values -1..=7, step by 2, so {-1, 1, 3, 5, 7}
+    let mut setting = make_setting!(SETTING: i8 = 42, -1..=7, 2).unwrap();
+
     loop {
         for i in 0..i32::MAX {
             sawtooth.set(i);
             sine.set(i);
-            cortex_m::asm::delay(100_000);
+
+            setting_roundtrip.set(setting.get());
         }
     }
 }
+
 ```
 
 The formulas seen in the `make_metric` macro invocation are computed by the host and will thus have zero impact on the targets performance. The `set` method on the metrics object is simply a volatile store which is quite cheap. The host will then read that value using the debug probe at regular intervals and update the graph on any changes.
@@ -50,4 +58,4 @@ cargo run ../examples/simple/target/thumbv7em-none-eabihf/debug/simple stm32g474
 # Rerun will open with a graph showing all created metrics objects
 ```
 
-<img width="2880" height="1920" alt="Screenshot" src="https://github.com/user-attachments/assets/5f7f20c9-009d-42c7-9613-789ae26afe54" />
+<img width="2050" height="1166" alt="image" src="https://github.com/user-attachments/assets/dcdced90-9130-449f-ae0e-22a92a3dd409" />

examples/simple/src/main.rs

@@ -5,18 +5,28 @@ use cortex_m_rt::entry;
 
 use defmt_rtt as _;
 use panic_halt as _;
+use probe_plotter::{make_metric, make_setting};
 
 #[entry]
 fn main() -> ! {
-    use probe_plotter::make_metric;
     defmt::println!("Running...");
-    let mut sawtooth = make_metric!(SAWTOOTH: i32 = 42, "(x / 10) % 100").unwrap();
+    let mut sawtooth = make_metric!(SAWTOOTH: i32 = 42, "(SAWTOOTH / 10) % 100").unwrap();
     defmt::println!("foo initialized to: {}", sawtooth.get());
-    let mut sine = make_metric!(SINE: i32 = 42, "100 * sin(2 * pi * x / 4000)").unwrap();
+    let mut sine = make_metric!(SINE: i32 = 42, "100 * sin(2 * pi * SINE / 4000)").unwrap();
+
+    let mut setting_roundtrip =
+        make_metric!(SETTING_ROUNDTRIP: i8 = 0, "SETTING_ROUNDTRIP").unwrap();
+
+    // Allow values -1..=7, step by 2, so {-1, 1, 3, 5, 7}
+    let mut setting = make_setting!(SETTING: i8 = 42, -1..=7, 2).unwrap();
+
     loop {
         for i in 0..i32::MAX {
             sawtooth.set(i);
             sine.set(i);
+
+            setting_roundtrip.set(setting.get());
+
             cortex_m::asm::delay(100_000);
         }
     }