void c6747_spi_AAI(Uint8 *src,Uint32 dst,Uint16 length)//地址自动增加连续写flash
{
Uint8 *srcp;
Uint8 spiflashbuf[7];
Uint16 i;
srcp=src;
if(length>0)
{
spiflashbuf[0]=spiflash_CMD_WREN;//it must be done before any write operation
spiflash_cycle(spiflashbuf,1);
spiflashbuf[0]=spiflash_CMD_AAI;
spiflashbuf[1]=(Uint8)(dst>>16);
spiflashbuf[2]=(Uint8)(dst>>8);
spiflashbuf[3]=(Uint8)(dst);
spiflashbuf[4]=*srcp++;
spiflashbuf[5]=*srcp++;//two-bytes of data
spiflash_cycle(spiflashbuf,6);
while (spiflash_status()&0x01);
for(i=2;i<length;i=i+2)
{
spiflashbuf[0]=spiflash_CMD_AAI;
spiflashbuf[1]=*srcp++;
spiflashbuf[2]=*srcp++;
spiflash_cycle(spiflashbuf,3);
while (spiflash_status()&0x01);
}
spiflashbuf[0]=spiflash_CMD_WRDI;//software mode.请查看数据手册关于其硬件和软件两种模式的问题
spiflash_cycle(spiflashbuf,1);
while (spiflash_status()&0x01);
}
//! Read a block to a buffer.
void spiflash_pokeblock(unsigned long adr,
unsigned char *buf,
unsigned int len){
unsigned char i;
SETSS;
spiflash_setstatus(0x02);
spiflash_wrten();
CLRSS; //Drop !SS to begin transaction.
spitrans8(0x02); //Poke command.
//Send address
spitrans8((adr&0xFF0000)>>16);
spitrans8((adr&0xFF00)>>8);
spitrans8(adr&0xFF);
for(i=0;i<len;i++)
spitrans8(buf[i]);
SETSS; //Raise !SS to end transaction.
while(spiflash_status()&0x01)
;
return;
}
void c6747_spi_write(Uint8 *src0,Uint32 dst0,Uint16 length1)//写一个字节到flash
{
Uint8 *src;
Uint32 dst;
Uint16 i;
Uint8 spiflashbuf[6];
dst=dst0;
src=src0;
for(i=0;i<length1;i++)//此处之所以更改为length1，是因为和下面length相同，运行时候出现错误。请查询真正原因，和存储方式应当有直接关系
{
spiflashbuf[0]=spiflash_CMD_WREN;
spiflash_cycle(spiflashbuf,1);
spiflashbuf[0]=spiflash_CMD_WRITE; //Byte-Program instruction.
//programs the bits in the selected byte to the desired data.
spiflashbuf[1]=(Uint8)(dst>>16);
spiflashbuf[2]=(Uint8)(dst>>8);
spiflashbuf[3]=(Uint8)(dst);
spiflashbuf[4]=*src++;
dst++;
spiflash_cycle(spiflashbuf,5);
while (spiflash_status()&0x01);
}
}
//! Handles a monitor command.
void spihandle(unsigned char app,
unsigned char verb,
unsigned char len){
unsigned char i;
//Raise !SS to end transaction, just in case we forgot.
P5OUT|=SS;
switch(verb){
//PEEK and POKE might come later.
case READ:
case WRITE:
P5OUT&=~SS; //Drop !SS to begin transaction.
for(i=0;i<len;i++)
cmddata[i]=spitrans8(cmddata[i]);
P5OUT|=SS; //Raise !SS to end transaction.
txdata(app,verb,len);
break;
case SPI_JEDEC://Grab 3-byte JEDEC ID.
P5OUT&=~SS; //Drop !SS to begin transaction.
spitrans8(0x9f);
len=3;
for(i=0;i<len;i++)
cmddata[i]=spitrans8(cmddata[i]);
txdata(app,verb,len);
P5OUT|=SS; //Raise !SS to end transaction.
break;
case PEEK://Grab 128 bytes from an SPI Flash ROM
spiflash_peek(app,verb,len);
break;
case POKE://Poke up bytes from an SPI Flash ROM.
spiflash_setstatus(0x02);
spiflash_wrten();
P5OUT&=~SS; //Drop !SS to begin transaction.
spitrans8(0x02); //Poke command.
//First three bytes are address, then data.
for(i=0;i<len;i++)
spitrans8(cmddata[i]);
P5OUT|=SS; //Raise !SS to end transaction.
while(spiflash_status()&0x01)//while busy
P1OUT^=1;
P1OUT&=~1;
txdata(app,verb,len);
break;
case SPI_ERASE://Erase the SPI Flash ROM.
spiflash_wrten();
P5OUT&=~SS; //Drop !SS to begin transaction.
spitrans8(0xC7);//Chip Erase
P5OUT|=SS; //Raise !SS to end transaction.
while(spiflash_status()&0x01)//while busy
P1OUT^=1;
P1OUT&=~1;
txdata(app,verb,0);
break;
case SETUP:
spisetup();
txdata(app,verb,0);
break;
}
}
/// Wait for a write or erase operation to complete
_ramfunc void spiflash_wait() {
while(spiflash_status() & 0x1);
}
