feat:add slave

src-tauri/src/serial_core/utils.rs

@@ -1,3 +1,5 @@
+use anyhow::Ok;
+use crc::{Crc, CRC_8_I_432_1, CRC_8_SMBUS};
 use std::time::Instant;
 
 pub fn usize_to_u16_be_bytes(n: usize) -> [u8; 2] {
@@ -16,23 +18,43 @@ pub fn u16_to_hex_le_bytes(n: u16) -> [u8; 2] {
     (n as u16).to_le_bytes()
 }
 
-pub fn crc8(data: &[u8]) -> u8 {
-    let mut crc: u8 = 0x00;
+pub fn calc_crc8_smbus(c: &[u8]) -> u8 {
+    let crc8_smbus = crc::Crc::<u8>::new(&crc::CRC_8_SMBUS);
+    let checksum = crc8_smbus.checksum(c);
+    return checksum;
+}
 
-    for &byte in data {
-        crc ^= byte;
-        for _ in 0..8 {
-            if (crc & 0x80) != 0 {
-                crc = (crc << 1) ^ 0x07;
-            } else {
-                crc <<= 1;
-            }
-        }
-    }
-
-    crc
+pub fn calc_crc8_itu(c: &[u8]) -> u8 {
+    let crc8_itu_alg = crc::Crc::<u8>::new(&crc::CRC_8_I_432_1);
+    let checksum = crc8_itu_alg.checksum(c);
+    return checksum;
 }
 
 pub fn elapsed_millis(start_at: Instant) -> u64 {
     start_at.elapsed().as_millis() as u64
+}
+
+#[cfg(test)]
+mod test {
+    use anyhow::Ok;
+
+    use crate::serial_core::utils::{calc_crc8_itu, calc_crc8_smbus};
+
+    #[test]
+    fn test_crc8_itu() -> anyhow::Result<()> {
+        let req_vec = vec![0x55, 0xAA, 0x09, 0x00, 0x34, 0x00, 0xFB, 0x00, 0x1C, 0x00, 0x00, 0x18, 0x00];
+        let checksum = calc_crc8_itu(req_vec.as_slice());
+        assert_eq!(checksum, 0x7A);
+
+        Ok(())
+    }
+
+    #[test]
+    fn test_crc8_smbus() -> anyhow::Result<()> {
+        let req_vec = vec![0x55, 0xAA, 0x09, 0x00, 0x34, 0x00, 0xFB, 0x00, 0x1C, 0x00, 0x00, 0x18, 0x00];
+        let checksum = calc_crc8_smbus(req_vec.as_slice());
+        assert_eq!(checksum, 0x2F);
+
+        Ok(())
+    }
 }