?? norflash.c
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#include "44blib.h"
#include "uart_lib.h"
#include "NorFlash.h"
#define BufLength 4096
volatile unsigned short g_Buf16[BufLength];
#define ROM_BASE 0
#define CMD_ADDR0 *((volatile unsigned short *)(0x5555*2+ROM_BASE))
#define CMD_ADDR1 *((volatile unsigned short *)(0x2aaa*2+ROM_BASE))
void DelayCycle(unsigned short n)
{
while(n--);
}
static void SWPIDEntry(void)
{
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x9090;
DelayCycle(10);
}
static void SWPIDExit(void)
{
CMD_ADDR0 = 0xf0f0;
}
int GetFlashID(void)
{
int i;
SWPIDEntry();
i = *(volatile unsigned short *)(0x0+ROM_BASE);
i |= (*(volatile unsigned short *)(2+ROM_BASE))<<16;
SWPIDExit();
return i;
}
int FlashSectorErase(volatile unsigned short * addr)
{
int count = 5000000;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x8080;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
*addr = 0x3030;
while (--count && ((*addr & 0xff) != 0xff))
{
}
return count;
}
int FlashBlockErase(volatile unsigned short * addr)
{
int count = 5000000;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x8080;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
*addr = 0x5050;
while (--count && ((*addr & 0xff) != 0xff))
{
}
return count;
}
int FlashChipErase(void)
{
int count = 5000000;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x8080;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x1010;
while (--count && ((CMD_ADDR1 & 0xff) != 0xff))
{
}
return count;
}
int FlashProgram(volatile unsigned short * addr, volatile unsigned short * data, unsigned int word_len)
{
int count;
unsigned short temp_data,temp1, temp2;
while(word_len--)
{
temp_data = *data;
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0xa0a0;
*addr = temp_data;
count = 1000;
while (--count)
{
temp1 = *addr;
temp2 = *addr;
if( (temp1&(1<<6)) == (temp2&(1<<6)) )
break;
}
if (count == 0)
break;
addr++;
data++;
}
if ( count == 0 )
Uart_Printf("Failed @ 0x%06x, req: 0x%04x, act: 0x%04x, now: 0x%04x\r\n", addr, *data, temp2, *addr);
return count;
}
static void SecurityIdEntry(void)
{
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0x8888;
DelayCycle(10);
}
static void SecurityIdExit(void)
{
CMD_ADDR0 = 0xf0f0;
DelayCycle(10);
}
void GetSecurityID(unsigned short *SecurityID)
{
unsigned short i;
SecurityIdEntry();
for(i=0x00;i<0x20;i++)
*SecurityID++ = *(volatile unsigned short *)(ROM_BASE+i*2);
SecurityIdExit();
}
void ShowSecurityID(void)
{
int i;
unsigned short SecurityID[32];
for(i=0;i<32;i++)
SecurityID[i]=0xffff;
GetSecurityID(SecurityID);
for(i=0;i<32;i++)
{
if(i<8)
{
Uart_Printf("SID[0x%02x]=0x%04x\n",i,SecurityID[i]);
}
if(i>=16 && i<24)
{
Uart_Printf("SID[0x%02x]=0x%04x\n",i,SecurityID[i]);
}
}
}
void UserSIDWrite( unsigned short index, unsigned short data)
{
volatile unsigned short * addr;
addr = (volatile unsigned short *)ROM_BASE;
{
CMD_ADDR0 = 0xaaaa;
CMD_ADDR1 = 0x5555;
CMD_ADDR0 = 0xa5a5;
*(addr+index) = data;
DelayCycle(10000);
}
}
//***************************************//
// Nor Flash 測試函數
//***************************************//
int TestNorFlash()
{
int i;
volatile unsigned short * addr = (volatile unsigned short * )0x200000; // 2M
static int gCount;
char ch;
i=GetFlashID();
Uart_Printf("FlashID=%xh\r\n",i);
do{
Uart_Printf("\nkey 'e' to erase\r\n");
Uart_Printf("key 'r' to read\r\n");
Uart_Printf("key 'w' to write\r\n");
Uart_Printf("key 'p' to previous sector\r\n");
Uart_Printf("key 'n' to next sector\r\n\r\n");
ch = SerialGetChar(0);
switch(ch)
{
case 'p': // 選擇前一個扇區
addr -= 1024*2;
break;
case 'n': // 選擇后一個扇區
addr += 1024*2;
break;
case 'e': // 擦除扇區
// 擦除的最小單位是扇區，39VF3201的扇區大小是4K
Uart_Printf("Erase sector at 0x%06x ", addr);
if( FlashSectorErase(addr))
Uart_Printf("OK!\r\n");
else
Uart_Printf("Failed!\r\n");
break;
case 'E': // 擦除芯片
Uart_Printf("Erase chip ");
if( FlashChipErase())
Uart_Printf("OK!\r\n");
else
Uart_Printf("Failed!\r\n");
break;
case 'r': // 讀扇區
// 數據可以按字/字節方式讀
Uart_Printf("Read data from 0x%06x:\r\n------------\r\n ",addr);
for(i=0;i<4096;i++)
{
if(i%16==0)
Uart_Printf("\r\n[0x%06X]:\t",(volatile unsigned char *)addr+i);
//if(i%16==0)
Uart_Printf("0x%02X\t",*((volatile unsigned char *)addr+i)) ;
}
Uart_Printf("\r\n-----------\nRead data end\r\n ");
break;
case 'w': // 寫部分扇區
// 數據可以按字(16位短整數)方式寫入，但必須先在所寫位置為空（0xffff）的時候才可以寫入正確的值
// 不能按字節寫，因為該FLASH是2M*16的FLASH,一次至少要寫16位
Uart_Printf("Burn data to 0x%06x ",addr);
for(i=0;i<128;i++)
g_Buf16[i]=i;
if( FlashProgram(addr, g_Buf16, 128) )
Uart_Printf("OK!\r\n");
else
Uart_Printf("Failed!\r\n");
break;
case 'W': // 寫多個扇區
Uart_Printf("Burn data to 0x%06x ",addr);
for(i=0;i<BufLength;i++)
{
g_Buf16[i]= (int)addr + i*2;
//Uart_Printf("Buf32[0x%04x]=0x%04x\r\n",i,Buf32[i]);
}
if( FlashProgram(addr, g_Buf16, BufLength) )
Uart_Printf("OK!\r\n");
else
Uart_Printf("Failed!\r\n");
break;
case 's': // 寫1個扇區
gCount++;
Uart_Printf("Burn data 0x%04x to 0x%06x ",gCount,addr);
for(i=0;i<2048;i++)
{
g_Buf16[i]= gCount;
//Uart_Printf("Buf32[0x%04x]=0x%04x\r\n",i,Buf32[i]);
}
if( FlashProgram(addr, g_Buf16, 2048) )
Uart_Printf("OK!\r\n");
else
Uart_Printf("Failed!\r\n");
Uart_Printf("g_Buf16[0x%04x]=0x%04x\r\n",16,g_Buf16[16]);
break;
case 'i': // Security ID
ShowSecurityID();
break;
default:
break;
}
} while(ch!=0x1b); //KEY_ESC
return 0;
}
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