1 files changed, 154 insertions, 0 deletions

diff --git a/examples/mcxa/src/bin/crc.rs b/examples/mcxa/src/bin/crc.rs
new file mode 100644
index 000000000..0125e625c
--- /dev/null
+++ b/examples/mcxa/src/bin/crc.rs
@@ -0,0 +1,154 @@
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+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();
+    let mut p = hal::init(config);
+
+    defmt::info!("CRC example");
+
+    let buf_u8 = [0x00u8, 0x11, 0x22, 0x33];
+    let buf_u16 = [0x0000u16, 0x1111, 0x2222, 0x3333];
+    let buf_u32 = [0x0000_0000u32, 0x1111_1111, 0x2222_2222, 0x3333_3333];
+
+    // 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());
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
+
+    let mut crc = Crc::new_ccitt_false(p.CRC0.reborrow());
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0xa467);
+
+    let mut crc = Crc::new_ccitt_false(p.CRC0.reborrow());
+    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());
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
+
+    let mut crc = Crc::new_maxim(p.CRC0.reborrow());
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0x2afe);
+
+    let mut crc = Crc::new_maxim(p.CRC0.reborrow());
+    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());
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
+
+    let mut crc = Crc::new_kermit(p.CRC0.reborrow());
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0x66eb);
+
+    let mut crc = Crc::new_kermit(p.CRC0.reborrow());
+    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());
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+    assert_eq!(sum, sw_sum);
+
+    let mut crc = Crc::new_iso_hdlc(p.CRC0.reborrow());
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0x8a61_4178);
+
+    let mut crc = Crc::new_iso_hdlc(p.CRC0.reborrow());
+    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());
+    crc.feed(&buf_u8);
+    let sum = crc.finalize();
+
+    assert_eq!(sum, sw_sum);
+
+    let mut crc = Crc::new_posix(p.CRC0.reborrow());
+    crc.feed(&buf_u16);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0x6d76_4f58);
+
+    let mut crc = Crc::new_posix(p.CRC0.reborrow());
+    crc.feed(&buf_u32);
+    let sum = crc.finalize();
+    assert_eq!(sum, 0x2a5b_cb90);
+
+    defmt::info!("CRC successful");
+}