From ee41d245c8b8c230e7ec2b65a0dc3f24899c33ee Mon Sep 17 00:00:00 2001
From: Robin Mueller <muellerr@irs.uni-stuttgart.de>
Date: Fri, 23 Jan 2026 14:42:43 +0100
Subject: [PATCH] issues with RTT

---
 firmware/.cargo/config.toml        |  2 +-
 firmware/examples/defmt/Cargo.toml |  2 +-
 probe-rs-test/src/main.rs          | 19 ++++++++++++++++++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/firmware/.cargo/config.toml b/firmware/.cargo/config.toml
index e95c744..62912ba 100644
--- a/firmware/.cargo/config.toml
+++ b/firmware/.cargo/config.toml
@@ -11,7 +11,7 @@ rustflags = [
   # If this is not enabled, debugging / stepping can become problematic.
   "-Cforce-frame-pointers=yes",
   # Can be useful for debugging.
-  # "-Clink-args=-Map=app.map"
+  "-Clink-args=-Map=app.map"
 ]
 
 [build]
diff --git a/firmware/examples/defmt/Cargo.toml b/firmware/examples/defmt/Cargo.toml
index 178db63..358b431 100644
--- a/firmware/examples/defmt/Cargo.toml
+++ b/firmware/examples/defmt/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://egit.irs.uni-stuttgart.de/rust/zynq7000-rs"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-aarch32-cpu = { version = "0.1" }
+aarch32-cpu = { version = "0.1", features = ["critical-section-single-core"] }
 zynq7000-rt = { path = "../../zynq7000-rt" }
 zynq7000 = { path = "../../zynq7000" }
 zynq7000-hal = { path = "../../zynq7000-hal", features = ["defmt"] }
diff --git a/probe-rs-test/src/main.rs b/probe-rs-test/src/main.rs
index 55ac0f6..df9fbd8 100644
--- a/probe-rs-test/src/main.rs
+++ b/probe-rs-test/src/main.rs
@@ -2,10 +2,11 @@ use std::{path::Path, time::Duration};
 
 use anyhow::Context;
 use probe_rs::{
-    Permissions,
+    MemoryInterface, Permissions,
     architecture::arm::{FullyQualifiedApAddress, core::registers::cortex_m::PC},
     flashing::{ElfOptions, Format, build_loader},
     probe::list::Lister,
+    rtt::{Rtt, RttChannel, ScanRegion},
     vendor::amd::sequences::x7z::AccessPort,
 };
 
@@ -55,7 +56,23 @@ fn main() -> anyhow::Result<()> {
     core.write_core_reg(PC.id, loader.vector_table_addr().unwrap())
         .with_context(|| "setting PC")?;
     core.run().with_context(|| "resuming core")?;
+    println!("trying to find CB");
+    let range = vec![(0x100000_u64..0x110000)];
+    let rtt_cb = Rtt::find_contol_block(&mut core, &ScanRegion::Ranges(range))?;
+    println!("RTT CB: {:#x}", rtt_cb);
+    let mut rtt = Rtt::attach_at(&mut core, rtt_cb)?;
+    let mut buf: [u8; 1024] = [0; 1024];
+    core.read(rtt_cb, &mut buf[0..12])?;
+    println!("RTT CB: {:#x?}", &buf[0..12]);
     loop {
+        /*
+                for up_ch in rtt.up_channels() {
+                    let read_bytes = up_ch.read(&mut core, &mut buf)?;
+                    if read_bytes > 0 {
+                        println!("read bytes {} on UP channel", read_bytes);
+                    }
+                }
+        */
         std::thread::sleep(Duration::from_millis(100));
     }
 }