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求助最后那個(gè) return(FnCmdInRam(0x40)); 等于多少？

算法數(shù)據(jù)結(jié)構(gòu)

慕無忌1623718 2022-06-17 15:11:53

typedef byte (*pCmdInRam)(byte cmd);typedef struct {unsigned char code[100];} CmdInRam_t;CmdInRam_t CmdInRam;pCmdInRam FnCmdInRam; // FnCmdInRam 函數(shù)的指針byte result;byte Flash_Cmd(byte Cmd){FCMD = Cmd;FSTAT = 0x80; // launch commandif(FSTAT&0x30){return 0xFF;}while(!FSTAT_FCCF){}return 0x01;}// sector erase (1k bytes)byte Flash_Erase(dword addr){FnCmdInRam = (void*)((dword)&CmdInRam);CmdInRam = *(CmdInRam_t *)(Flash_Cmd);FSTAT = 0x30;*(dword *)addr = 0x55;return(FnCmdInRam(0x40));}

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1 回答

富國滬深

TA貢獻(xiàn)1790條經(jīng)驗(yàn) 獲得超9個(gè)贊

pCmdInRam是一個(gè)函數(shù)指針類型
定義了一個(gè)指向函數(shù)的指針就是FnCmdInRam
FnCmdInRam = (void*)((dword)&CmdInRam); 這句里面FnCmdInRam指向了CmdInRam這個(gè)函數(shù)
所以最后的
return(FnCmdInRam(0x40));
其實(shí)就是
return(Flash_Cmd(0x40));這樣的

反對回復(fù) 2022-06-20