Add a way to add existing symbols as metrics (#25) + refactor

Author: usbalbin

examples/simple/Cargo.lock

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+probe-rs download $1 $2 $3
+../../probe-plotter-tools/target/release/viewer $1 $3

examples/simple/runner.rs

@@ -1,17 +1,34 @@
 #![no_std]
 #![no_main]
 
+use core::sync::atomic::{AtomicU32, Ordering};
 use cortex_m_rt::entry;
 
 use defmt_rtt as _;
 use panic_halt as _;
-use probe_plotter::{make_metric, make_setting};
+use probe_plotter::{
+    make_metric, make_metric_from_address, make_metric_from_base_with_offset, make_ptr,
+    make_setting,
+};
+
+#[unsafe(no_mangle)]
+static MY_ATOMIC: AtomicU32 = AtomicU32::new(42);
+
+// Hardcoded address
+make_metric_from_address!(DWT_CYCCNT: i8 @ 0xE0001004, "DWT_CYCCNT");
 
 #[entry]
 fn main() -> ! {
     defmt::println!("Running...");
+
+    let mut my_base_ptr = make_ptr!(BASE_THING).unwrap();
+    let mut base_thing: [u8; 10] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+    my_base_ptr.set(&base_thing as *const _ as u32); // Ensure this is something that will effectivly live as long as this or any depending values will be plotted
+
+    make_metric_from_base_with_offset!(root.path.child: u8 @ BASE_THING + 3, "root.path.child");
+
     let mut sawtooth = make_metric!(SAWTOOTH: i32 = 42, "(SAWTOOTH / 10) % 100").unwrap();
-    defmt::println!("sawtooth initialized to: {}", sawtooth.get());
+    //defmt::println!("sawtooth initialized to: {}", sawtooth.get());
     let mut sine = make_metric!(SINE: i32 = 42, "100 * sin(2 * pi * SINE / 4000)").unwrap();
 
     let mut setting_roundtrip =
@@ -24,9 +41,13 @@ fn main() -> ! {
         for i in 0..i32::MAX {
             sawtooth.set(i);
             sine.set(i);
+            MY_ATOMIC.fetch_add(1, Ordering::SeqCst);
 
             setting_roundtrip.set(setting.get());
 
+            let idx = i as usize % base_thing.len();
+            base_thing[idx] = base_thing[idx].wrapping_add(1);
+
             cortex_m::asm::delay(100_000);
         }
     }