How to swap bytes in MCU
Posted: 10-Jan-2023, 23:05
Code: Select all
/// Network to host byte order conversion.
#if defined (__CC_ARM)
// ARM Compiler 4/5
#define ntohl(v) (uint32_t)(__rev(v))
#define ntohs(v) (uint16_t)(__rev(v) >> 16)
#else
// ARM Compiler 6
#define ntohl(v) __builtin_bswap32((uint32_t)(v))
#define ntohs(v) __builtin_bswap16((uint16_t)(v))
#endif
Code: Select all
/// Host to network byte order conversion.
#ifndef htons
#define htons(v) ntohs(v)
#define htonl(v) ntohl(v)
#endif