From b3ca9eeabf0443a3775824fca8fa8d508dab4d08 Mon Sep 17 00:00:00 2001
From: cscherr <Christoph.Scherr@newtec.de>
Date: Wed, 9 Jul 2025 15:02:17 +0200
Subject: [PATCH] feat: create crc crate

---
 .cargo/config.toml        |  6 +++++-
 Cargo.lock                |  4 ++++
 Cargo.toml                |  3 +++
 crates/crc/.gitignore     |  1 +
 crates/crc/Cargo.toml     |  6 ++++++
 crates/crc/src/crc_32.rs  |  0
 crates/crc/src/crc_dev.rs |  9 +++++++++
 crates/crc/src/lib.rs     | 14 ++++++++++++++
 scripts/flash.sh          |  6 ++++++
 9 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100755 crates/crc/.gitignore
 create mode 100755 crates/crc/Cargo.toml
 create mode 100755 crates/crc/src/crc_32.rs
 create mode 100755 crates/crc/src/crc_dev.rs
 create mode 100755 crates/crc/src/lib.rs
 create mode 100755 scripts/flash.sh

diff --git a/.cargo/config.toml b/.cargo/config.toml
index 2aafa28..b280dc1 100755
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,11 +1,15 @@
 [build]
-target = "thumbv6m-none-eabi"
+# target = "thumbv6m-none-eabi"
+
+[test]
+target = "x86_64-unknown-linux-gnu"
 
 [target.thumbv6m-none-eabi]
 runner = 'probe-rs run --chip STM32L053R8'
 
 
 [alias]
+target = "thumbv6m-none-eabi"
 cflash = "flash --chip STM32L053R8"
 
 [env]
diff --git a/Cargo.lock b/Cargo.lock
index afdb2df..d094e9f 100755
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -92,6 +92,10 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "crc"
+version = "0.1.0"
+
 [[package]]
 name = "critical-section"
 version = "1.2.0"
diff --git a/Cargo.toml b/Cargo.toml
index 3c51828..ff3db82 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,3 +17,6 @@ panic-probe = { version = "0.3", features = ["print-defmt"] }
 
 [profile.release]
 debug = "full" # those are not on the board
+
+[workspace]
+members = ["", "crates/crc"]
diff --git a/crates/crc/.gitignore b/crates/crc/.gitignore
new file mode 100755
index 0000000..ea8c4bf
--- /dev/null
+++ b/crates/crc/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/crates/crc/Cargo.toml b/crates/crc/Cargo.toml
new file mode 100755
index 0000000..585d3ea
--- /dev/null
+++ b/crates/crc/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "crc"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/crates/crc/src/crc_32.rs b/crates/crc/src/crc_32.rs
new file mode 100755
index 0000000..e69de29
diff --git a/crates/crc/src/crc_dev.rs b/crates/crc/src/crc_dev.rs
new file mode 100755
index 0000000..4d75d4b
--- /dev/null
+++ b/crates/crc/src/crc_dev.rs
@@ -0,0 +1,9 @@
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}
diff --git a/crates/crc/src/lib.rs b/crates/crc/src/lib.rs
new file mode 100755
index 0000000..91b6a76
--- /dev/null
+++ b/crates/crc/src/lib.rs
@@ -0,0 +1,14 @@
+mod crc_32;
+pub use crc_32::*;
+
+// for testing purposes
+mod crc_dev;
+pub use crc_dev::*;
+
+pub trait Crc {
+    type Input: ?Sized;
+    type Checksum: Eq;
+    const CHECKSUM_LEN: usize;
+
+    fn process(data: &Self::Input) -> Self::Checksum;
+}
diff --git a/scripts/flash.sh b/scripts/flash.sh
new file mode 100755
index 0000000..2f24e45
--- /dev/null
+++ b/scripts/flash.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+# I'm using a bash script because if i set the target in .cargo/config.toml 
+# i can't build for x86_64 anymore, which means I can't run the unit tests.
+TARGET="thumbv6m-none-eabi"
+cargo build --target $TARGET
+cargo run --target $TARGET