2 files changed, 84 insertions, 20 deletions

diff --git a/examples/mcxa/Cargo.toml b/examples/mcxa/Cargo.toml
index 4d0459f41..19d8d8657 100644
--- a/examples/mcxa/Cargo.toml
+++ b/examples/mcxa/Cargo.toml
@@ -8,6 +8,7 @@ publish = false
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
 cortex-m-rt = { version = "0.7", features = ["set-sp", "set-vtor"] }
+crc = "3.4.0"
 critical-section = "1.2.0"
 defmt = "1.0"
 defmt-rtt = "1.0"
diff --git a/examples/mcxa/src/bin/crc.rs b/examples/mcxa/src/bin/crc.rs
index 12c423980..0125e625c 100644
--- a/examples/mcxa/src/bin/crc.rs
+++ b/examples/mcxa/src/bin/crc.rs
@@ -6,6 +6,28 @@ use hal::config::Config;
 use hal::crc::Crc;
 use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
 
+const CCITT_FALSE: crc::Algorithm<u16> = crc::Algorithm {
+    width: 16,
+    poly: 0x1021,
+    init: 0xffff,
+    refin: false,
+    refout: false,
+    xorout: 0,
+    check: 0x29b1,
+    residue: 0x0000,
+};
+
+const POSIX: crc::Algorithm<u32> = crc::Algorithm {
+    width: 32,
+    poly: 0x04c1_1db7,
+    init: 0,
+    refin: false,
+    refout: false,
+    xorout: 0xffff_ffff,
+    check: 0x765e_7680,
+    residue: 0x0000,
+};
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let config = Config::default();
@@ -19,72 +41,113 @@ async fn main(_spawner: Spawner) {
 
     // CCITT False
 
+    let sw_crc = crc::Crc::<u16>::new(&CCITT_FALSE);
+    let mut digest = sw_crc.digest();
+    digest.update(&buf_u8);
+    let sw_sum = digest.finalize();
+
     let mut crc = Crc::new_ccitt_false(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u8);
-    assert_eq!(sum, 0x9627);
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
 
     let mut crc = Crc::new_ccitt_false(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u16);
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
     assert_eq!(sum, 0xa467);
 
     let mut crc = Crc::new_ccitt_false(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u32);
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
     assert_eq!(sum, 0xe5c7);
 
     // Maxim
 
+    let sw_crc = crc::Crc::<u16>::new(&crc::CRC_16_MAXIM_DOW);
+    let mut digest = sw_crc.digest();
+    digest.update(&buf_u8);
+    let sw_sum = digest.finalize();
+
     let mut crc = Crc::new_maxim(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u8);
-    assert_eq!(sum, 0x4ff7);
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
 
     let mut crc = Crc::new_maxim(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u16);
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x2afe);
 
     let mut crc = Crc::new_maxim(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u32);
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x17d7);
 
     // Kermit
 
+    let sw_crc = crc::Crc::<u16>::new(&crc::CRC_16_KERMIT);
+    let mut digest = sw_crc.digest();
+    digest.update(&buf_u8);
+    let sw_sum = digest.finalize();
+
     let mut crc = Crc::new_kermit(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u8);
-    assert_eq!(sum, 0xccd2);
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
 
     let mut crc = Crc::new_kermit(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u16);
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x66eb);
 
     let mut crc = Crc::new_kermit(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u32);
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x75ea);
 
     // ISO HDLC
 
+    let sw_crc = crc::Crc::<u32>::new(&crc::CRC_32_ISO_HDLC);
+    let mut digest = sw_crc.digest();
+    digest.update(&buf_u8);
+    let sw_sum = digest.finalize();
+
     let mut crc = Crc::new_iso_hdlc(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u8);
-    assert_eq!(sum, 0x24c2_316d);
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
 
     let mut crc = Crc::new_iso_hdlc(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u16);
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x8a61_4178);
 
     let mut crc = Crc::new_iso_hdlc(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u32);
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
     assert_eq!(sum, 0xfab5_d04e);
 
     // POSIX
 
+    let sw_crc = crc::Crc::<u32>::new(&POSIX);
+    let mut digest = sw_crc.digest();
+    digest.update(&buf_u8);
+    let sw_sum = digest.finalize();
+
     let mut crc = Crc::new_posix(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u8);
-    assert_eq!(sum, 0xba8d_7868);
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+
+    assert_eq!(sum, sw_sum);
 
     let mut crc = Crc::new_posix(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u16);
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x6d76_4f58);
 
     let mut crc = Crc::new_posix(p.CRC0.reborrow());
-    let sum = crc.feed(&buf_u32);
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
     assert_eq!(sum, 0x2a5b_cb90);
 
     defmt::info!("CRC successful");