對於32位的系統來說，是以4個字節的方式來進行存儲數據，但對於存儲的多數據中混有小於4字節的數據來說，則需要特殊處理。若想實現按照實際數據順序進行存儲，處理方法如下：
1.處理定義的單個結構體中混有多種數據類型加“__packed”，例子：
typedef __packed struct
{
uint8 a;
uint8 b[2];
uint16 c;
uint32 d;
}
2.處理定義的多個結構體在需要處理的數據開頭和結尾加“#pragma pack(1) ...(內容) #pragma pack()”,例子：
#pragma pack (1)
typedef struct {
union {
uint8 byte;
struct {
uint8 recuactworksts:2;
uint8 recufaultlevel:3;
uint8 recuactivedischgfb:2;
uint8 rsv:1;
}bits;
}recuworkinfo1;
uint16 recuactpowerfb;
uint16 recumaxpowerpermit;
union {
uint16 word;
struct {
uint8 recuoutofflvfb:2;
uint8 recuselfchkstate:2;
uint8 rsv:8;
uint8 recuworkinfoalivecnt:4;
}bits;
}recuworkinfo2;
uint8 recuworkinfochecksum;
}RECU_WorkInfo_ST;
typedef struct {
uint16 gcudclinkvoltage;
uint16 gcudclinkcurrent;
uint8 gcuactmotortemp;
uint8 rcv;
union {
uint8 byte;
struct {
uint8 gcumotorstsainvalid:1;
uint8 gcumotorinfoinvalid:1;
uint8 rcv:6;
}bits;
}recugcuinfo1;
uint8 rcv1;
}RECU_GCUInfo_ST;
#pragma pack ()
注：上面實例中藍色部分數據是對數據細分到位進行處理
總結及常用的場景：
當接收到的一包數據中有多種類型時，可以先將數據對應的結構體定義好，再將數據複製到定義的結構體中，即將整包全部的數據都解析出來。實例：
#pragma pack (1)
typedef struct {
union {
uint8 byte;
struct {
uint8 recuactworksts:2;
uint8 recufaultlevel:3;
uint8 recuactivedischgfb:2;
uint8 rsv:1;
}bits;
}recuworkinfo1;
uint16 recuactpowerfb;
uint16 recumaxpowerpermit;
union {
uint16 word;
struct {
uint8 recuoutofflvfb:2;
uint8 recuselfchkstate:2;
uint8 rsv:8;
uint8 recuworkinfoalivecnt:4;
}bits;
}recuworkinfo2;
uint8 recuworkinfochecksum;
}RECU_WorkInfo_ST;
typedef struct {
uint16 gcudclinkvoltage;
uint16 gcudclinkcurrent;
uint8 gcuactmotortemp;
uint8 rcv;
union {
uint8 byte;
struct {
uint8 gcumotorstsainvalid:1;
uint8 gcumotorinfoinvalid:1;
uint8 rcv:6;
}bits;
}recugcuinfo1;
uint8 rcv1;
}RECU_GCUInfo_ST;
typedef struct {
uint8 enginecoolanttemp;
union {
uint8 byte;
struct {
uint8 oilpressurewarning:1;
uint8 rcv1:1;
uint8 enginemiltelltale:2;
uint8 rcv2:4;
}bits;
}recuemsinfo1;
uint16 enginespeedrpm;
uint16 recumaxpowerpermit;
union {
uint8 byte;
struct {
uint8 engstatusfbinvalid:1;
uint8 engstatusinfoinvalid:1;
uint8 rsv:6;
}bits;
}recuemsinfo2;
uint8 rcv;
}RECU_EMSInfo_ST;
typedef struct {
union {
uint8 byte;
struct {
uint8 faultlevel:2;
uint8 recuworkrequest:2;
uint8 carconnectstatus:2;
uint8 rsv:2;
}bits;
}cdzfaultlevel;
uint16 powerrequest;
uint8 rsv1[3];
union {
uint8 byte;
struct {
uint8 rsv:4;
uint8 recuctrlalivecnt:4;
}bits;
}cdzrecuctrl2;
uint8 recuctrlchecksum;
}CDZ_RECUCtrl_ST;
typedef struct {
uint8 rsv1[2];
uint16 bmscurrreq;
uint16 bmsvolreq;
uint8 rsv2[2];
}CDZ_BMSChgInfo_ST;
typedef struct {
uint16 bmsbattvol;
uint16 bmsbattcurr;
uint8 bmsbattsoc;
uint8 rsv1[3];
}CDZ_BMSBatInfo_ST;
#pragma pack ()
typedef struct {
CDZ_RECUCtrl_ST recuctrl;
CDZ_BMSChgInfo_ST bmschginfo;
CDZ_BMSBatInfo_ST bmsbatinfo;
}CDZTORECU_ST;
typedef struct {
RECU_WorkInfo_ST recuctrl;
RECU_GCUInfo_ST bmschginfo;
RECU_EMSInfo_ST bmsbatinfo;
}RECUTOCDZ_ST;
typedef struct {
CDZTORECU_ST cdz;
RECUTOCDZ_ST recu;
// ERR_STEP_ST err;
}DEV_RECU_TYPE;
typedef union {
uint8 data[8];
CDZ_RECUCtrl_ST Cdz_RecuCtrlData;
CDZ_BMSChgInfo_ST Cdz_BmsChgInfoData;
CDZ_BMSBatInfo_ST Cdz_BmsBatInfoData;
RECU_WorkInfo_ST Recu_WorkInfoData;
RECU_GCUInfo_ST Recu_GcuInfoData;
RECU_EMSInfo_ST Recu_EmsInfoData;
}CDZ_RECUData;