TQ2440-S3C2440-裸机ARM软中断

/* support 512 page and 2048 page NAND Flash */ //#include <string.h> //#include "def.h" #include "2440addr.h" #include "nand.h" static void NF_Reset() { NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_RESET); NF_Check_Busy(); NF_Disable(); } void NF_Init(void) { rGPACON &= ~(0X3F << 17) ; rGPACON |= (0X3F << 17) ; rNFCONF = (TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4); rNFCONT = (0<<12)|(1<<0); rNFSTAT = 0; NF_Reset(); } void NF_ReadID(unsigned char *buf) { /*char pMID; char pDID; char nBuff; char n4thcycle; char n5thcycle ;*/ int i; NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_READID); // read id command NF_Send_Addr(0x0); for ( i = 0; i < 100; i++ ); *buf = NF_Read_Byte(); *(buf+1) = NF_Read_Byte(); *(buf+2) = NF_Read_Byte(); *(buf+3) = NF_Read_Byte(); *(buf+4) = NF_Read_Byte(); NF_Disable(); //return (pDID); } char rNF_ReadID() { char pMID; char pDID; char nBuff; char n4thcycle; char n5thcycle ; int i; NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_READID); NF_Send_Addr(0x0); for ( i = 0; i < 100; i++ ); pMID = NF_Read_Byte(); pDID = NF_Read_Byte(); nBuff = NF_Read_Byte(); n4thcycle = NF_Read_Byte(); NF_Disable(); return (pDID); } static void SB_ReadPage(unsigned int addr, unsigned char * to)//这段程序用于，Nand Flash每页大小是512个字节 { unsigned int i; NF_Reset(); // Enable the chip NF_Enable(); NF_Enable_RB(); // Issue Read command NF_Send_Cmd(CMD_READ1); // Set up address NF_Send_Addr(0x00); NF_Send_Addr((addr) & 0xff); NF_Send_Addr((addr >> 8) & 0xff); NF_Send_Addr((addr >> 16) & 0xff); NF_Check_Busy(); // wait tR(max 12us) for (i = 0; i < 512; i++) { to[i] = NF_Read_Byte(); } NF_Disable(); } void LB_ReadPage(unsigned int addr, unsigned char * dstaddr)//这段程序用于，Nand Flash每页大小是2048个字节 { unsigned int i; //这里没有用到ECC校验；只是简单的读取数据 NF_Reset(); //这里的addr实际上就是页号 // Enable the chip NF_Enable(); NF_Enable_RB(); // Issue Read command NF_Send_Cmd(CMD_READ1);//CMD_READ1= 0x00 // Set up address NF_Send_Addr(0x00); //整页读取的话列地址设为0即可； NF_Send_Addr(0x00); NF_Send_Addr((addr) & 0xff); NF_Send_Addr((addr >> 8) & 0xff); NF_Send_Addr((addr >> 16) & 0x1); NF_Send_Cmd(CMD_READ2);//CMD_READ12= 0x30 NF_Check_Busy(); // wait tR(max 12us) for (i = 0; i < 2048; i++) { dstaddr[i] = NF_Read_Byte(); } NF_Disable(); } void NF_ReadPage(unsigned int block,unsigned int page, unsigned char * dstaddr)//这段程序用于，Nand Flash每页大小是2048个字节 { unsigned int i; //这里没有用到ECC校验；只是简单的读取数据 unsigned int blockPage = (block<<6)+page; NF_Reset(); //这里的addr实际上就是页号 NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_READ1); //CMD_READ1= 0x00 NF_Send_Addr(0x00); NF_Send_Addr(0x00); NF_Send_Addr((blockPage) & 0xff); NF_Send_Addr((blockPage >> 8) & 0xff); NF_Send_Addr((blockPage >> 16) & 0x1); NF_Send_Cmd(CMD_READ2); //CMD_READ12= 0x30 NF_Check_Busy(); for (i = 0; i < 2048; i++) { dstaddr[i] = NF_Read_Byte(); } NF_Disable(); } void NF_WritePage(unsigned int block,unsigned int page, unsigned char *buffer) { unsigned int i; unsigned int blockPage = (block<<6)+page; unsigned char *bufPt = buffer; NF_Reset(); //这里的addr实际上就是页号 NF_Enable(); //控制器使能 NF_Enable_RB(); //开启RnB监视模式 NF_Send_Cmd(CMD_WRITE1); /* 写第一条命令 */ NF_Send_Addr(0x00); //整页写入的话列地址设为0即可； NF_Send_Addr(0x00); NF_Send_Addr((blockPage) & 0xff); NF_Send_Addr((blockPage >> 8) & 0xff); NF_Send_Addr((blockPage >> 16) & 0x1); for(i=0;i<2048;i++) { NF_Send_Data(*bufPt++); /* 写一个页512字节到Nand Flash芯片 */ } NF_Send_Cmd(CMD_WRITE2); NF_Check_Busy(); NF_Disable(); } int NF_EraseBlock(unsigned int block) { unsigned int blocknum=(block<<6); int i; NF_Reset(); NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_ERASE1); NF_Send_Addr( blocknum & 0xff); NF_Send_Addr((blocknum>>8) & 0xff); NF_Send_Addr((blocknum>>16) & 0xff); NF_Send_Cmd(CMD_ERASE2) ; for (i = 0; i < 1000; i++) ; NF_Check_Busy() ; NF_Disable() ; return 1 ; } unsigned char NF_ReadPage_ECC(unsigned int addr, unsigned char * dstaddr) { unsigned int i,mecc0,secc; //这里没有用到ECC校验；只是简单的读取数据 NF_Reset(); //这里的addr实际上就是页号 NF_MECC_UnLock() ;//解锁main区ECC // Enable the chip NF_Enable(); NF_Enable_RB(); // Issue Read command NF_Send_Cmd(CMD_READ1);//CMD_READ1= 0x00 // Set up address NF_Send_Addr(0x00); //整页读取的话列地址设为0即可； NF_Send_Addr(0x00); NF_Send_Addr((addr) & 0xff); NF_Send_Addr((addr >> 8) & 0xff); NF_Send_Addr((addr >> 16) & 0x1); NF_Send_Cmd(CMD_READ2);//CMD_READ12= 0x30 NF_Check_Busy(); // wait tR(max 12us) for (i = 0; i < 2048; i++) { dstaddr[i] = NF_Read_Byte(); } NF_MECC_Lock() ; //锁定main区ECC NF_SECC_UnLock() ; mecc0 = NF_RDDATA() ;//这个地方注意前面已经读到2047了，这里接着读就是后面的内容了 rNFMECCD0 = ((mecc0 & 0xff00) << 8) | (mecc0 & 0xff) ;//这里rNFMECCD0是32位的，但是这时的NAND FLASH是8位的I/O接口关系，所以只用到了[7:0]和[23:16] ; rNFMECCD1 = ((mecc0 & 0xff000000) >> 8) | ((mecc0 & 0xff0000) >> 16) ; NF_SECC_Lock() ; secc = NF_RDDATA() ; rNFSECCD = ((secc & 0xff00) << 8) | (secc & 0xff) ; NF_Disable(); if((rNFESTAT0 & 0xf) == 0) return 0x66 ;//如果校验正确，则返回0x66 else return 0x44 ; } unsigned char NF_RamdomRead(unsigned int block, unsigned int page, unsigned int add) { unsigned char buf ; unsigned int page_number = (block<<6) + page; NF_Reset(); NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_READ1); NF_Send_Addr(0x00); NF_Send_Addr(0x00); NF_Send_Addr((page_number) & 0xff); NF_Send_Addr((page_number >> 8) & 0xff); NF_Send_Addr((page_number >> 16) & 0xff); NF_Send_Cmd(CMD_READ2); //页读命令周期2:0x30 NF_Check_Busy(); NF_Send_Cmd(CMD_RANDOMREAD1); NF_Send_Addr((char)(add&0xff)); NF_Send_Addr((char)((add>>8)&0x0f)); NF_Send_Cmd(CMD_RANDOMREAD2); NF_Check_Busy(); buf = NF_Read_Byte() ; NF_Disable(); //关闭片选 return buf; //读取数据 } unsigned char NF_RamdomWrite(unsigned int block,unsigned int page, unsigned int add, unsigned char dat) { unsigned int page_number = (block<<6)+page; NF_Enable(); NF_Enable_RB(); NF_Send_Cmd(CMD_WRITE1); NF_Send_Addr(0x00); NF_Send_Addr(0x00); NF_Send_Addr((page_number) & 0xff); NF_Send_Addr((page_number >> 8) & 0xff); NF_Send_Addr((page_number >> 16) & 0xff); NF_Send_Cmd(CMD_RANDOMWRITE); NF_Send_Addr((char)(add&0xff)); NF_Send_Addr((char)((add>>8)&0x0f)); NF_Send_Data(dat); NF_Send_Cmd(CMD_WRITE2); NF_Check_Busy(); NF_Disable(); } void RdNF2SDRAM(void) { unsigned int i; unsigned int start_addr = 0x0; unsigned char * dstaddr = (unsigned char *)0x30000000; unsigned int size = 0x100000; NF_Init(); switch(rNF_ReadID()) { case 0xD6: for(i = (start_addr >> 9); size > 0; ) { SB_ReadPage(i, dstaddr); size -= 512; dstaddr += 512; i ++; } break; case 0xDA: for(i = (start_addr >> 11); size > 0;i ++ ) { //LB_ReadPage(i, dstaddr); NF_ReadPage(i/64,i%64, dstaddr); size -= 2048; dstaddr += 2048; } break; } }