Add pressure visual modes and breakout game

src/serial_core/utils.rs

@@ -1,5 +1,26 @@
 use std::time::Instant;
 
+pub fn usize_to_u16_be_bytes(n: usize) -> [u8; 2] {
+    (n as u16).to_be_bytes()
+}
+
+pub fn usize_to_u16_le_bytes(n: usize) -> [u8; 2] {
+    (n as u16).to_be_bytes()
+}
+
+pub fn u16_to_hex_be_bytes(n: u16) -> [u8; 2] {
+    n.to_be_bytes()
+}
+
+pub fn u16_to_hex_le_bytes(n: u16) -> [u8; 2] {
+    n.to_le_bytes()
+}
+
+pub fn calc_crc8_smbus(c: &[u8]) -> u8 {
+    let crc8_smbus = crc::Crc::<u8>::new(&crc::CRC_8_SMBUS);
+    crc8_smbus.checksum(c)
+}
+
 pub fn calc_crc8_itu(c: &[u8]) -> u8 {
     let crc8_itu_alg = crc::Crc::<u8>::new(&crc::CRC_8_I_432_1);
     crc8_itu_alg.checksum(c)
@@ -8,3 +29,26 @@ pub fn calc_crc8_itu(c: &[u8]) -> u8 {
 pub fn elapsed_millis(start_at: Instant) -> u64 {
     start_at.elapsed().as_millis() as u64
 }
+
+#[cfg(test)]
+mod test {
+    use crate::serial_core::utils::{calc_crc8_itu, calc_crc8_smbus};
+
+    #[test]
+    fn test_crc8_itu() {
+        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);
+    }
+
+    #[test]
+    fn test_crc8_smbus() {
+        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);
+    }
+}