嵌入式C/C开发中常用工具类函数整理分类记录便于查询使用。1、数组数据处理voidSetU16(uint8_t*buffer,uint16_t value){buffer[0]value0xff;buffer[1](value8)0xff;}uint16_tGetU16(constuint8_t*buffer){uint16_t value0;value|buffer[0];value|(buffer[1]8);returnvalue;}voidSetU32(uint8_t*buffer,uint32_t value){buffer[0]value0xff;buffer[1](value8)0xff;buffer[2](value16)0xff;buffer[3](value24)0xff;}uint32_tGetU24(constuint8_t*buffer){uint32_t value0;value|buffer[0];value|(buffer[1]8);value|(buffer[2]16);returnvalue;}voidSetU24(uint8_t*buffer,uint32_t value){buffer[0]value0xff;buffer[1](value8)0xff;buffer[2](value16)0xff;}uint32_tGetU32(constuint8_t*buffer){uint32_t value0;value|buffer[0];value|(buffer[1]8);value|(buffer[2]16);value|(buffer[3]24);returnvalue;}voidSetU16Big(uint8_t*buffer,uint16_t value){buffer[0](value8)0xff;buffer[1]value0xff;}uint16_tGetU16Big(constuint8_t*buffer){uint16_t value0;value|buffer[1];value|(buffer[0]8);returnvalue;}voidSetU24Big(uint8_t*buffer,uint32_t value){buffer[2]value0xff;buffer[1](value8)0xff;buffer[0](value16)0xff;}uint32_tGetU24Big(constuint8_t*buffer){uint32_t value0;value|buffer[2];value|(buffer[1]8);value|(buffer[0]16);returnvalue;}voidSetU32Big(uint8_t*buffer,uint32_t value){buffer[3]value0xff;buffer[2](value8)0xff;buffer[1](value16)0xff;buffer[0](value24)0xff;}uint32_tGetU32Big(constuint8_t*buffer){uint32_t value0;value|buffer[3];value|(buffer[2]8);value|(buffer[1]16);value|(buffer[0]24);returnvalue;}2、BCD与HEX转换uint8_tBcdToHex(uint8_t bcd){uint8_t hex0;if(((bcd0x0f)0x09)||((bcd0xf0)0x90)){return0;}hexbcd0x0f;hex((bcd4)0xf)*10;returnhex;}uint8_tHexToBcd(uint8_t hex){uint8_t bcd0;if(hex99){return0;}bcdhex%10;bcd((hex/10)%10)4;returnbcd;}3、数据校验uint8_tCheckSum(constuint8_t*data,uint32_t length){uint8_t check0;while(length--){check*data;}return0x100-check;}uint8_tCheckXor(constuint8_t*data,uint32_t length){uint8_t check0;while(length--){check^*data;}return~check;}// x16x12x51staticconstuint16_t CRC16_TABLE[]{0x0000,0x1189,0x2312,0x329b,0x4624,0x57ad,0x6536,0x74bf,0x8c48,0x9dc1,0xaf5a,0xbed3,0xca6c,0xdbe5,0xe97e,0xf8f7,0x1081,0x0108,0x3393,0x221a,0x56a5,0x472c,0x75b7,0x643e,0x9cc9,0x8d40,0xbfdb,0xae52,0xdaed,0xcb64,0xf9ff,0xe876,0x2102,0x308b,0x0210,0x1399,0x6726,0x76af,0x4434,0x55bd,0xad4a,0xbcc3,0x8e58,0x9fd1,0xeb6e,0xfae7,0xc87c,0xd9f5,0x3183,0x200a,0x1291,0x0318,0x77a7,0x662e,0x54b5,0x453c,0xbdcb,0xac42,0x9ed9,0x8f50,0xfbef,0xea66,0xd8fd,0xc974,0x4204,0x538d,0x6116,0x709f,0x0420,0x15a9,0x2732,0x36bb,0xce4c,0xdfc5,0xed5e,0xfcd7,0x8868,0x99e1,0xab7a,0xbaf3,0x5285,0x430c,0x7197,0x601e,0x14a1,0x0528,0x37b3,0x263a,0xdecd,0xcf44,0xfddf,0xec56,0x98e9,0x8960,0xbbfb,0xaa72,0x6306,0x728f,0x4014,0x519d,0x2522,0x34ab,0x0630,0x17b9,0xef4e,0xfec7,0xcc5c,0xddd5,0xa96a,0xb8e3,0x8a78,0x9bf1,0x7387,0x620e,0x5095,0x411c,0x35a3,0x242a,0x16b1,0x0738,0xffcf,0xee46,0xdcdd,0xcd54,0xb9eb,0xa862,0x9af9,0x8b70,0x8408,0x9581,0xa71a,0xb693,0xc22c,0xd3a5,0xe13e,0xf0b7,0x0840,0x19c9,0x2b52,0x3adb,0x4e64,0x5fed,0x6d76,0x7cff,0x9489,0x8500,0xb79b,0xa612,0xd2ad,0xc324,0xf1bf,0xe036,0x18c1,0x0948,0x3bd3,0x2a5a,0x5ee5,0x4f6c,0x7df7,0x6c7e,0xa50a,0xb483,0x8618,0x9791,0xe32e,0xf2a7,0xc03c,0xd1b5,0x2942,0x38cb,0x0a50,0x1bd9,0x6f66,0x7eef,0x4c74,0x5dfd,0xb58b,0xa402,0x9699,0x8710,0xf3af,0xe226,0xd0bd,0xc134,0x39c3,0x284a,0x1ad1,0x0b58,0x7fe7,0x6e6e,0x5cf5,0x4d7c,0xc60c,0xd785,0xe51e,0xf497,0x8028,0x91a1,0xa33a,0xb2b3,0x4a44,0x5bcd,0x6956,0x78df,0x0c60,0x1de9,0x2f72,0x3efb,0xd68d,0xc704,0xf59f,0xe416,0x90a9,0x8120,0xb3bb,0xa232,0x5ac5,0x4b4c,0x79d7,0x685e,0x1ce1,0x0d68,0x3ff3,0x2e7a,0xe70e,0xf687,0xc41c,0xd595,0xa12a,0xb0a3,0x8238,0x93b1,0x6b46,0x7acf,0x4854,0x59dd,0x2d62,0x3ceb,0x0e70,0x1ff9,0xf78f,0xe606,0xd49d,0xc514,0xb1ab,0xa022,0x92b9,0x8330,0x7bc7,0x6a4e,0x58d5,0x495c,0x3de3,0x2c6a,0x1ef1,0x0f78};uint16_tCheckCrc16(constuint8_t*data,uint32_t length){uint16_t crc160xffff;while(length--){crc16CRC16_TABLE[(crc16^*data)0xFF]^(crc168);}returncrc16^0xffff;}4、时间日期处理staticuint16_t yearH2000;typedefstruct{uint8_t year;uint8_t month;uint8_t day;uint8_t hour;uint8_t minute;uint8_t second;uint8_t week;}DateTime;// DateTime转换为SecondsboolRtcDateTimeToSeconds(DateTime*dateTime,uint32_t*seconds){uint32_t year;uint32_t era,yoe;uint32_t doe,doy;uint32_t days,mp;yearyearHdateTime-year-(dateTime-month2?1:0);era(year0?year:year-399)/400;yoeyear-era*400;mpdateTime-month(dateTime-month2?-3:9);doy(153*mp2)/5dateTime-day-1;doeyoe*365yoe/4-yoe/100doy;daysera*146097doe-719468;*seconds((days*24dateTime-hour)*60dateTime-minute)*60dateTime-second;returntrue;}// Seconds转换为DateTimeboolRtcSecondsToDateTime(uint32_t seconds,DateTime*dateTime){uint32_t year;uint32_t era,yoe;uint32_t doe,doy;uint32_t days,mp;daysseconds/86400719468;era(days0?days:days-146096)/146097;doedays-era*146097;yoe(doe-doe/1460doe/36524-doe/146096)/365;doydoe-(365*yoeyoe/4-yoe/100);mp(5*doy2)/153;yearyoeera*400(dateTime-month2?1:0);dateTime-daydoy-(153*mp2)/51;dateTime-monthmp(mp10?3:-9);dateTime-yearyear%100;yearHyear/100*100;returntrue;}5、数据位反转typedefenum{BYTE1,HALF_WORD2,WORD3}REFLECTED_MODE;uint32_tReflectedData(uint32_t data,REFLECTED_MODE mode){switch(mode){caseWORD:data((data0xffff0000)16)|((data0x0000ffff)16);caseHALF_WORD:data((data0xff00ff00)8)|((data0x00ff00ff)8);caseBYTE:data((data0xf0f0f0f0)4)|((data0x0f0f0f0f)4);data((data0xcccccccc)2)|((data0x33333333)2);data((data0xaaaaaaaa)1)|((data0x55555555)1);break;}returndata;}voidReflectedBuffer(constuint8_t*src,uint8_t*dest,uint32_t length,REFLECTED_MODE mode){uint32_t i;switch(mode){caseWORD:if((length%4)!0){return;}for(i0;ilength;i4){SetU32(dest[i],ReflectedData(GetU32(src[i]),WORD));}break;caseHALF_WORD:if((length%2)!0){return;}for(i0;ilength;i2){SetU16(dest[i],ReflectedData(GetU16(src[i]),HALF_WORD));}break;caseBYTE:for(i0;ilength;i){dest[i]ReflectedData(src[i],BYTE);}break;}}voidReflectedBufferBig(constuint8_t*src,uint8_t*dest,uint32_t length,REFLECTED_MODE mode){uint32_t i;switch(mode){caseWORD:if((length%4)!0){return;}for(i0;ilength;i4){SetU32Big(dest[i],ReflectedData(GetU32Big(src[i]),WORD));}break;caseHALF_WORD:if((length%2)!0){return;}for(i0;ilength;i2){SetU16Big(dest[i],ReflectedData(GetU16Big(src[i]),HALF_WORD));}break;caseBYTE:for(i0;ilength;i){dest[i]ReflectedData(src[i],BYTE);}break;}}