Unitemp SCD40 support

by divinebird

applications/external/unitemp/interfaces/endianness.h

@@ -0,0 +1,60 @@
+//
+// Created by Avilov Vasily on 10.06.2023.
+//
+
+#ifndef FLIPPERZERO_FIRMWARE_ENDIANNESS_H
+#define FLIPPERZERO_FIRMWARE_ENDIANNESS_H
+
+inline static void store16(uint8_t* b, uint16_t i) {
+    memcpy(b, &i, 2);
+}
+
+inline static void store32(uint8_t* b, uint32_t i) {
+    memcpy(b, &i, 4);
+}
+
+inline static uint16_t load16(uint8_t* b) {
+    uint16_t x;
+    memcpy(&x, b, 2);
+    return x;
+}
+
+inline static uint32_t load32(uint8_t* b) {
+    uint32_t x;
+    memcpy(&x, b, 4);
+    return x;
+}
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define htobe16(x) (x)
+#define htobe32(x) (x)
+#define htole16(x) __builtin_bswap16(x)
+#define htole32(x) __builtin_bswap32(x)
+#define be16toh(x) (x)
+#define be32toh(x) (x)
+#define le16toh(x) __builtin_bswap16(x)
+#define le32toh(x) __builtin_bswap32(x)
+#elif BYTE_ORDER == LITTLE_ENDIAN
+#define htobe16(x) __builtin_bswap16(x)
+#define htobe32(x) __builtin_bswap32(x)
+#define htole16(x) (x)
+#define htole32(x) (x)
+#define be16toh(x) __builtin_bswap16(x)
+#define be32toh(x) __builtin_bswap32(x)
+#define le16toh(x) (x)
+#define le32toh(x) (x)
+#else
+#error "What kind of system is this?"
+#endif
+
+#define load16_le(b) (le16toh(load16(b)))
+#define load32_le(b) (le32toh(load32(b)))
+#define store16_le(b, i) (store16(b, htole16(i)))
+#define store32_le(b, i) (store32(b, htole32(i)))
+
+#define load16_be(b) (be16toh(load16(b)))
+#define load32_be(b) (be32toh(load32(b)))
+#define store16_be(b, i) (store16(b, htobe16(i)))
+#define store32_be(b, i) (store32(b, htobe32(i)))
+
+#endif //FLIPPERZERO_FIRMWARE_ENDIANNESS_H