From e224e6cef4e0508f14bb9ffd1d9d0fc9220c07d8 Mon Sep 17 00:00:00 2001
From: Dion Dokter <diondokter@gmail.com>
Date: Sun, 14 Apr 2024 01:10:20 +0200
Subject: [PATCH] Add CRC
---
embassy-stm32/src/crc/v2v3.rs | 2 ++
examples/stm32u0/src/bin/crc.rs | 31 +++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+)
create mode 100644 examples/stm32u0/src/bin/crc.rs
diff --git a/embassy-stm32/src/crc/v2v3.rs b/embassy-stm32/src/crc/v2v3.rs
index 13fb6778c..ad7c79f12 100644
--- a/embassy-stm32/src/crc/v2v3.rs
+++ b/embassy-stm32/src/crc/v2v3.rs
@@ -13,6 +13,8 @@ pub struct Crc<'d> {
}
/// CRC configuration errlr
+#[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub enum ConfigError {
/// The selected polynomial is invalid.
InvalidPolynomial,
diff --git a/examples/stm32u0/src/bin/crc.rs b/examples/stm32u0/src/bin/crc.rs
new file mode 100644
index 000000000..d1b545d5b
--- /dev/null
+++ b/examples/stm32u0/src/bin/crc.rs
@@ -0,0 +1,31 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::crc::{Config, Crc, InputReverseConfig, PolySize};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+ let p = embassy_stm32::init(Default::default());
+ info!("Hello World!");
+
+ // Setup for: https://crccalc.com/?crc=Life, it never dieWomen are my favorite guy&method=crc32&datatype=ascii&outtype=0
+ let mut crc = Crc::new(
+ p.CRC,
+ unwrap!(Config::new(
+ InputReverseConfig::Byte,
+ true,
+ PolySize::Width32,
+ 0xFFFFFFFF,
+ 0x04C11DB7
+ )),
+ );
+
+ let output = crc.feed_bytes(b"Life, it never die\nWomen are my favorite guy") ^ 0xFFFFFFFF;
+
+ defmt::assert_eq!(output, 0x33F0E26B);
+
+ cortex_m::asm::bkpt();
+}