Added the zig_main project to software for zig based implementation of code for robot

software/zig_main/imports/crc.zig

@@ -0,0 +1,51 @@
+const sys = @import("sys");
+
+// ---------------------------------------------------------------------------
+// CRC helpers — thin wrappers around the ESP-ROM implementations.
+//
+// All functions take a running `crc` (pass 0 for the first block) and a
+// data slice, and return the updated CRC value.
+//
+// Le = reflected polynomial (little-endian / standard CRC convention).
+// Be = non-reflected polynomial (big-endian convention).
+// ---------------------------------------------------------------------------
+
+// ── CRC-8 ─────────────────────────────────────────────────────────────────
+
+/// CRC-8 with reflected (little-endian) polynomial.
+pub fn crc8Le(crc: u8, buf: []const u8) u8 {
+    return sys.esp_rom_crc8_le(crc, buf.ptr, buf.len);
+}
+
+/// CRC-8 with non-reflected (big-endian) polynomial.
+pub fn crc8Be(crc: u8, buf: []const u8) u8 {
+    return sys.esp_rom_crc8_be(crc, buf.ptr, buf.len);
+}
+
+// ── CRC-16 ────────────────────────────────────────────────────────────────
+
+/// CRC-16 with reflected (little-endian) polynomial.
+pub fn crc16Le(crc: u16, buf: []const u8) u16 {
+    return sys.esp_rom_crc16_le(crc, buf.ptr, buf.len);
+}
+
+/// CRC-16 with non-reflected (big-endian) polynomial.
+pub fn crc16Be(crc: u16, buf: []const u8) u16 {
+    return sys.esp_rom_crc16_be(crc, buf.ptr, buf.len);
+}
+
+// ── CRC-32 ────────────────────────────────────────────────────────────────
+
+/// CRC-32 with reflected (little-endian) polynomial — compatible with
+/// zlib / Ethernet / standard CRC-32.
+pub fn crc32Le(crc: u32, buf: []const u8) u32 {
+    return sys.esp_rom_crc32_le(crc, buf.ptr, buf.len);
+}
+
+/// CRC-32 with non-reflected (big-endian) polynomial.
+pub fn crc32Be(crc: u32, buf: []const u8) u32 {
+    return sys.esp_rom_crc32_be(crc, buf.ptr, buf.len);
+}
+
+// ── Zig stdlib CRC (kept for pure-Zig use without ROM calls) ──────────────
+pub const zigCRC32 = @import("std").hash.crc;