main.c

怎么样操作flash

#include <reg51.h>
#include "mcu_def.h"
#include "sd_reg.h"
#define  FL_ALE_SET()   DPL = FL_CTRL0; DPH = 0x42; PIOP = 0x87;
#define  FL_ALE_CLR()   DPL = FL_CTRL0; DPH = 0x42; PIOP = 0x47;
sfr PIOP = 0x98;
sbit psw1 = PSW^1;
void wait_rb(void);
void fl_cmd(unsigned char cmd);


volatile unsigned char xdata fl_data  _at_ 0x7f00;
volatile unsigned char xdata ff_data  _at_ 0x8f00;

//flash reg
volatile unsigned char xdata fl_CTRL0  _at_ 0x4200;
volatile unsigned char xdata fl_CTRL1  _at_ 0x4201;
//dma2
volatile unsigned char xdata dma2_LEN0  _at_ 0x4010;
volatile unsigned char xdata dma2_LEN1  _at_ 0x4011;
volatile unsigned char xdata dma2_A0  _at_ 0x4012;
volatile unsigned char xdata dma2_A1  _at_ 0x4013;

volatile unsigned char xdata flash_LOG_A0	 _at_	0x4208;
volatile unsigned char xdata flash_LOG_A1	 _at_	0x4209;
volatile unsigned char xdata flash_LOG_A2	 _at_	0x420a;
volatile unsigned char xdata flash_LOG_A3	 _at_	0x420b;
volatile unsigned char xdata flash_LOG_A4	 _at_	0x420c;
volatile unsigned char xdata flash_LOG_A5	 _at_	0x420d;

volatile unsigned char xdata *p;
int i;
main()
{
 unsigned char n1,n2,n3,n4,n5,status,ram_data;
 
 for (i=0,p = 0; i<512; i++,p++)
 *p = i + 1;
 
 for (i=0,p = 0; i<512; i++,p++)
 {
 ram_data = *p;
 i = i;
}
 
 fl_CTRL1 = 0x0c;
 fl_CTRL0 = 0x3e;
 wait_rb();
 
 //read ID
 
 fl_cmd(0x90);
 FL_ALE_SET();
 fl_data = 0X00;
 FL_ALE_CLR();
 
 ff_data = 0x00;
 
 n1 = fl_data;
 ff_data = 0x00;
 n2 = fl_data;
 ff_data = 0x00;
 n3 = fl_data;
 ff_data = 0x00;
 n4 = fl_data;
 ff_data = 0x00;
 n5 = fl_data;
 
 //ERASE FLASH
 fl_cmd(0x60);
 
 FL_ALE_SET();
 fl_data = 0X00; //ROW ADDR1
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR2
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR3
 ff_data = 0x00;
 FL_ALE_CLR();
 
 fl_cmd(0xD0);
 
 wait_rb();
 
 //read status
 fl_cmd(0x70);
 status = fl_data;

 flash_LOG_A0 = 0x11;
 flash_LOG_A1 = 0x22;
 flash_LOG_A2 = 0x33;
 flash_LOG_A3 = 0x44;
 flash_LOG_A4 = 0x55;
 flash_LOG_A5 = 0x66;
 
 //write flash 
 fl_cmd(0x80);
 
 FL_ALE_SET();
 fl_data = 0X00; //column ADDR1
 ff_data = 0x00; 
 fl_data = 0X00; //column ADDR2
 ff_data = 0x00;  
 fl_data = 0X00; //ROW ADDR1
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR2
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR3
 ff_data = 0x00;
 FL_ALE_CLR();

 DPL = FL_CTRL1; 
 DPH = 0x42; 
 PIOP = RW_ECC_set;

 DPL = FL_CTRL1; 
 DPH = 0x42; 
 PIOP = CAL_LOG_set;
 
 dma2_LEN0 = 0x80;
 dma2_LEN1 = 0;
 dma2_A0 = 0;
 dma2_A1 = 0;
 
 DPL = DMA2CTRL; 
 DPH = 0x40; 
 PIOP = DMA_SEND_set;
 
 DPL = DMA2CTRL; 
 DPH = 0x40; 
 PIOP = DMA_START_set;

//ecc control
 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_CLR_set;

 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_GEN_set;


 //start flash write
 DPL = FL_CTRL0; 
 DPH = 0x42; 
 PIOP = FL_WRN_clr;
 
 //wait for DMA done
 DPL = DMA2STATUS;
 DPH = 0x40;
 PIOP = DMA_DONE_test;
 while (!psw1)
 PIOP = DMA_DONE_test;
 //wait for flash-write done
 DPL = FL_STATUS;
 DPH = 0x42;
 PIOP = RW_DONE_test;
 while (!psw1)
 PIOP = RW_DONE_test;
 //stop flash write
 DPL = FL_CTRL0; 
 DPH = 0x42; 
 PIOP = FL_WRN_set;

 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_GEN_clr;
 
 fl_cmd(0x10);
 
 wait_rb();
 
 fl_cmd(0x70);
 status = fl_data;
 
 for (i=0; i<512; i++);
 
 //read flash
 fl_cmd(0x00);
 
 FL_ALE_SET();
 fl_data = 0X00; //column ADDR1
 ff_data = 0x00; 
 fl_data = 0X00; //column ADDR2
 ff_data = 0x00;  
 fl_data = 0X00; //ROW ADDR1
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR2
 ff_data = 0x00; 
 fl_data = 0X00; //ROW ADDR3
 ff_data = 0x00;
 FL_ALE_CLR();
 
 fl_cmd(0x30);
 wait_rb();
 
 dma2_LEN0 = 0x80;
 dma2_LEN1 = 0;
 dma2_A0 = 0x90;
 dma2_A1 = 0;
 
 DPL = DMA2CTRL; 
 DPH = 0x40; 
 PIOP = DMA_SEND_clr;
 
 DPL = DMA2CTRL; 
 DPH = 0x40; 
 PIOP = DMA_START_set;

//ecc control
 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_CLR_set;

 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_DEC_set;

 //start flash write
 DPL = FL_CTRL0; 
 DPH = 0x42; 
 PIOP = FL_RDN_clr;
 
 //wait for DMA done
 DPL = DMA2STATUS;
 DPH = 0x40;
 PIOP = DMA_DONE_test;
 while (!psw1)
 PIOP = DMA_DONE_test;
 //wait for flash-write done
 DPL = FL_STATUS;
 DPH = 0x42;
 PIOP = RW_DONE_test;
 while (!psw1)
 PIOP = RW_DONE_test;
 //stop flash write
 DPL = FL_CTRL0; 
 DPH = 0x42; 
 PIOP = FL_RDN_set;

 DPL = ECC_CTRL; 
 DPH = 0x42; 
 PIOP = ECC_DEC_clr;
 
 for (i=0,p = 0x0090; i<512; i++,p++)
 {
 ram_data = *p;
 i = i;
}
 
while(1);
 
 
 
 
 
 
 
 
 
 
 


}

void wait_rb(void)
{
 DPL = FL_STATUS;
 DPH = 0x42;
 PIOP = FL_RB0_test;
 while (!psw1)
 PIOP = FL_RB0_test;	
	
}

void fl_cmd(unsigned char cmd)
{
 DPL = FL_CTRL0;
 DPH = 0x42;
 PIOP = FL_CLE_set;
 fl_data = cmd;
 DPL = FL_CTRL0;
 DPH = 0x42;
 PIOP = FL_CLE_clr;
	
}
/*
void fl_ale_set(void)
{
 DPL = FL_CTRL0;
 DPH = 0x42;
 PIOP = FL_CLE_set;	
}

void fl_ale_clr(void)
{
 DPL = FL_CTRL0;
 DPH = 0x42;
 PIOP = FL_ALE_clr;	
}*/