|
再次感谢caiyuqing，感谢本站的fly-feiser转载，这些给了我很多的启发。
共三个文件：s3c2410.h, nand_flash.h, nand_flash.c。
1.s3c2410.h
#ifndef _S3C2410_H
#define _S3C2410_H
// watchdog register
#define rWTCON (*(volatile unsigned int *)0x53000000)
//interrupt register
#define rSRCPND (*(volatile unsigned int *)0x4A000000)
#define rSUBSRCPND (*(volatile unsigned int *)0x4A000018)
#define rINTMOD (*(volatile unsigned int *)0x4A000004)
#define rINTMSK (*(volatile unsigned int *)0x4A000008)
#define rINTSUBMSK (*(volatile unsigned int *)0x4A00001C)
#define rPRIORITY (*(volatile unsigned int *)0x4A00000C)
#define rINTPND (*(volatile unsigned int *)0x4A000010)
#define rINTOFFSET (*(volatile unsigned int *)0x4A000014)
// bank ctrl register
#define rBWSCON (*(volatile unsigned int *)0x48000000)
#define rREFRESH (*(volatile unsigned int *)0x48000024)
// NAND flash register
#define rNFCONF (*(volatile unsigned int *)0x4e000000) //NAND Flash configuration
#define rNFCMD (*(volatile unsigned char *)0x4e000004) //NADD Flash command
#define rNFADDR (*(volatile unsigned char *)0x4e000008) //NAND Flash address
#define rNFDATA (*(volatile unsigned char *)0x4e00000c) //NAND Flash data
#define rNFSTAT (*(volatile unsigned int *)0x4e000010) //NAND Flash operation status
#define rNFECC (*(volatile unsigned int *)0x4e000014) //NAND Flash ECC
#define rNFECC0 (*(volatile unsigned char *)0x4e000014)
#define rNFECC1 (*(volatile unsigned char *)0x4e000015)
#define rNFECC2 (*(volatile unsigned char *)0x4e000016)
// I/O PORT register
#define rGPACON (*(volatile unsigned int *)0x56000000) //Port A control
#define rGPADAT (*(volatile unsigned int *)0x56000004) //Port A data
#define rGPBCON (*(volatile unsigned int *)0x56000010) //Port B control
#define rGPBDAT (*(volatile unsigned int *)0x56000014) //Port B data
#define rGPBUP (*(volatile unsigned int *)0x56000018) //Pull-up control B
#define rGPCCON (*(volatile unsigned int *)0x56000020) //Port C control
#define rGPCDAT (*(volatile unsigned int *)0x56000024) //Port C data
#define rGPCUP (*(volatile unsigned int *)0x56000028) //Pull-up control C
#define rGPDCON (*(volatile unsigned int *)0x56000030) //Port D control
#define rGPDDAT (*(volatile unsigned int *)0x56000034) //Port D data
#define rGPDUP (*(volatile unsigned int *)0x56000038) //Pull-up control D
#define rGPECON (*(volatile unsigned int *)0x56000040) //Port E control
#define rGPEDAT (*(volatile unsigned int *)0x56000044) //Port E data
#define rGPEUP (*(volatile unsigned int *)0x56000048) //Pull-up control E
#define rGPFCON (*(volatile unsigned int *)0x56000050) //Port F control
#define rGPFDAT (*(volatile unsigned int *)0x56000054) //Port F data
#define rGPFUP (*(volatile unsigned int *)0x56000058) //Pull-up control F
#define rGPGCON (*(volatile unsigned int *)0x56000060) //Port G control
#define rGPGDAT (*(volatile unsigned int *)0x56000064) //Port G data
#define rGPGUP (*(volatile unsigned int *)0x56000068) //Pull-up control G
#define rGPHCON (*(volatile unsigned int *)0x56000070) //Port H control
#define rGPHDAT (*(volatile unsigned int *)0x56000074) //Port H data
#define rGPHUP (*(volatile unsigned int *)0x56000078) //Pull-up control H
//UART register
#define rULCON0 (*(volatile unsigned int *)0x50000000) //UART 0 Line control
#define rUCON0 (*(volatile unsigned int *)0x50000004) //UART 0 Control
#define rUFCON0 (*(volatile unsigned int *)0x50000008) //UART 0 FIFO control
#define rUMCON0 (*(volatile unsigned int *)0x5000000C) //UART 0 Modem control
#define rUTRSTAT0 (*(volatile unsigned int *)0x50000010) //UART 0 Tx/Rx status
#define rUERSTAT0 (*(volatile unsigned int *)0x50000014) //UART 0 Rx error status
#define rUFSTAT0 (*(volatile unsigned int *)0x50000018) //UART 0 FIFO status
#define rUMSTAT0 (*(volatile unsigned int *)0x5000001C) //UART 0 Modem status
#define rUBRDIV0 (*(volatile unsigned int *)0x50000028) //UART 0 Baud rate divisor
#define rUTXH0 (*(volatile unsigned char *)0x50000020) //UART 0 Transmission Hold
#define rURXH0 (*(volatile unsigned char *)0x50000024) //UART 0 Receive buffer
#define WrUTXH0(ch) (*(volatile unsigned char *)0x50000020)=(unsigned char)(ch)
#define RdURXH0() (*(volatile unsigned char *)0x50000024)
// CLOCK & POWER MANAGEMENT
#define rLOCKTIME (*(volatile unsigned int *)0x4c000000) //PLL lock time counter
#define rMPLLCON (*(volatile unsigned int *)0x4c000004) //MPLL Control
#define rUPLLCON (*(volatile unsigned int *)0x4c000008) //UPLL Control
#define rCLKCON (*(volatile unsigned int *)0x4c00000c) //Clock generator control
#define rCLKSLOW (*(volatile unsigned int *)0x4c000010) //Slow clock control
#define rCLKDIVN (*(volatile unsigned int *)0x4c000014) //Clock divider control
// LCD register
#define rLCDCON1 (*(volatile unsigned int *)0x4D000000)
#define rLCDCON2 (*(volatile unsigned int *)0x4D000004)
#define rLCDCON3 (*(volatile unsigned int *)0x4D000008)
#define rLCDCON4 (*(volatile unsigned int *)0x4D00000c)
#define rLCDCON5 (*(volatile unsigned int *)0x4D000010)
#define rLCDSADDR1 (*(volatile unsigned int *)0x4D000014)
#define rLCDSADDR2 (*(volatile unsigned int *)0x4D000018)
#define rLCDSADDR3 (*(volatile unsigned int *)0x4D00001c)
#define rREDLUT (*(volatile unsigned int *)0x4D000020)
#define rGREENLUT (*(volatile unsigned int *)0x4D000024)
#define rBLUELUT (*(volatile unsigned int *)0x4D000028)
#define rDITHMODE (*(volatile unsigned int *)0x4D00004c)
#define rTPAL (*(volatile unsigned int *)0x4D000050)
#define rLCDINTPND (*(volatile unsigned int *)0x4D000054)
#define rLCDSRCPND (*(volatile unsigned int *)0x4D000058)
#define rLCDINTMSK (*(volatile unsigned int *)0x4D00005c)
#define rLPCSEL (*(volatile unsigned int *)0x4D000060)
// Timer register
#define rTCFG0 (*(volatile unsigned int *)0x51000000)
#define rTCFG1 (*(volatile unsigned int *)0x51000004)
#define rTCON (*(volatile unsigned int *)0x51000008)
#define rTCNTB0 (*(volatile unsigned int *)0x5100000C)
#define rTCMPB0 (*(volatile unsigned int *)0x51000010)
#define rTCNTO0 (*(volatile unsigned int *)0x51000014)
#define rTCNTB1 (*(volatile unsigned int *)0x51000018)
#define rTCMPB1 (*(volatile unsigned int *)0x5100001C)
#define rTCNTO1 (*(volatile unsigned int *)0x51000020)
#define rTCNTB2 (*(volatile unsigned int *)0x51000024)
#define rTCMPB2 (*(volatile unsigned int *)0x51000028)
#define rTCNTO2 (*(volatile unsigned int *)0x5100002C)
#define rTCNTB3 (*(volatile unsigned int *)0x51000030)
#define rTCMPB3 (*(volatile unsigned int *)0x51000034)
#define rTCNTO3 (*(volatile unsigned int *)0x51000038)
#define rTCNTB4 (*(volatile unsigned int *)0x5100003C)
#define rTCNTO4 (*(volatile unsigned int *)0x51000040)
#endif
2.nand_flash.h
#ifndef _NAND_FLASH_H
#define _NAND_FLASH_H
#define TACLS 0 //1clk(0ns)
#define TWRPH0 3 //3clk(25ns)
#define TWRPH1 0 //1clk(10ns) //TACLS+TWRPH0+TWRPH1>=50ns
//send command
#define NF_CMD(cmd) {rNFCMD=cmd;}
//set address
#define NF_ADDR(addr) {rNFADDR=addr;}
//NAND Flash Memory chip enable
#define NF_nFCE_L() {rNFCONF&=~(1<<11);}
//NAND Flash Memory chip disable
#define NF_nFCE_H() {rNFCONF|=(1<<11);}
//Initialize ECC
#define NF_RSTECC() {rNFCONF|=(1<<12);}
//read data
#define NF_RDDATA() (rNFDATA)
//write data
#define NF_WRDATA(data) {rNFDATA=data;}
//get status
#define NF_WAITRB() {while(!(rNFSTAT&(1)));}
#endif
3.nand_flash.c
/*
www.another-prj.com
author: caiyuqing
本代码只属于交流学习，不得用于商业开发
*/
#include "s3c2410.h"
#include "nand_flash.h"
static unsigned char seBuf[16]={0xff};
//--------------------------------------------------------------------------------------
unsigned short nf_checkId(void)
{
int i;
unsigned short id;
NF_nFCE_L(); //chip enable
NF_CMD(0x90); //Read ID
NF_ADDR(0x0);
for(i=0;i<10;i++); //wait tWB(100ns)
id=NF_RDDATA()<<8; // Maker code(K9S1208V:0xec)
id|=NF_RDDATA(); // Devide code(K9S1208V:0x76)
NF_nFCE_H(); //chip enable
return id;
}
//--------------------------------------------------------------------------------------
static void nf_reset(void)
{
int i;
NF_nFCE_L(); //chip enable
NF_CMD(0xFF); //reset command
for(i=0;i<10;i++); //tWB = 100ns.
NF_WAITRB(); //wait 200~500us;
NF_nFCE_H(); //chip disable
}
//--------------------------------------------------------------------------------------
void nf_init(void)
{
rNFCONF=(1<<15)|(1<<14)|(1<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0);
// 1 1 1 1 1 xxx r xxx, r xxx
// En r r ECCR nFCE=H tACLS tWRPH0 tWRPH1
nf_reset();
}
//--------------------------------------------------------------------------------------
void nf_read(unsigned int src_addr,unsigned char *desc_addr,int size)
{
int i;
unsigned int column_addr=src_addr%512; // column address
unsigned int page_address=(src_addr>>9); // page addrress
unsigned char *buf=desc_addr;
while((unsigned int)buf<(unsigned int)(desc_addr)+size)
{
NF_nFCE_L(); // enable chip
if(column_addr>255) // 2end halft
{
NF_CMD(0x01); // Read2 command. cmd 0x01: Read command(start from 2end half page)
}
else
{
NF_CMD(0x00); // 1st halft?
}
NF_ADDR(column_addr&0xff); // Column Address
NF_ADDR(page_address&0xff); // Page Address
NF_ADDR((page_address>>8)&0xff); // ...
NF_ADDR((page_address>>16)&0xff); // ..
for(i=0;i<10;i++); // wait tWB(100ns)/////??????
NF_WAITRB(); // Wait tR(max 12us)
// Read from main area
for(i=column_addr;i<512;i++)
{
*buf++=NF_RDDATA();
}
NF_nFCE_H(); // disable chip
column_addr=0;
page_address++;
}
return ;
}
|