NandFlash的规范程序代码.doc

nandflash裸机驱动程序的分析nandflash在嵌入式设备中广泛的应用，学些nandflash的重要性不言而喻，这里分析一段实例代码，不管是编码规范还是程序的结构都是很有价值的。下边是K9F1208U0M的实例代码。首先看nand.h文件：#ifndef __NAND_Flash__#define __NAND_Flash__extern void InitNandCfg(void); //初始化K9F1208UOM NAND flash 配置extern unsigned int ReadChipId(void); //读取NAND Flash的ID号extern unsigned short ReadStatus(void); //读取NAND Flash的状态extern unsigned int EraseBlock(unsigned int addr); //NAND Flash块擦除 extern void ReadPage(unsigned int addr, unsigned char *buf); //K9F1208U0M nand flash 的页数据读 extern void WritePage(unsigned int addr, unsigned char *buf); //K9F1208U0M nand flash 的页数据写 extern void MarkBadBlk(unsigned int addr); //屏蔽 K9F1208U0M nand flash 的坏块 extern int CheckBadBlk(unsigned int addr); //检查 K9F1208U0M nand flash 的坏块 extern void InitNandFlash(void); //K9F1208U0M nand flash 的初始化 #endif 需要详细看的是nandflash.c文件：//==================================================== // 常量定义区 //==================================================== #define EnNandFlash() (rNFCONF |= 0x8000) //bit15=1 enable NAND flash controller #define DsNandFlash() (rNFCONF = ~0x8000) //bit15=1 disable NAND flash controller #define InitEcc() (rNFCONF |= 0x1000) //bit12=1 initialize ECC #define NoEcc() (rNFCONF = ~0x1000) //bit12=0 initialize ECC #define NFChipEn() (rNFCONF = ~0x800) //bit11=0 NAND flash nFCE = L (active) #define NFChipDs() (rNFCONF |= 0x800) //bit11=1 NAND flash nFCE = H (inactive) #define WrNFCmd(cmd) (rNFCMD = (cmd)) //write commond to nand flash #define WrNFAddr(addr) (rNFADDR = (addr)) //write address to nand flash #define WrNFDat(dat) (rNFDATA = (dat)) //write data to nand flash #define RdNFDat() (rNFDATA) //read data from nand flash #define RdNFStat() (rNFSTAT) //read status from nand flash #define NFIsBusy() (!(rNFSTAT1)) //whether nand flash is busy? #defin