unsigned char read_status_register(void)
{
unsigned char i;
AT45DB161_CS=0;
input_8bit(OPCOM_READ_STATUS_REGISTER);
for(i=0;i<8;i++)
{
AT45DB161_SO=1; //first setup the output pin
AT45DB161_SCK=0; //falling eage to read
rdata=rdata<<1;
BIT0=AT45DB161_SO;
AT45DB161_SCK=1;
}
AT45DB161_CS=1;
return(rdata);
}
unsigned char read_flash(unsigned char opcom,unsigned int page_address,unsigned int in_page_address)
{
unsigned char i;
unsigned char address_byte_1,address_byte_2,address_byte_3;
unsigned int address;
address=(page_address<<2)|(in_page_address>>8); //combine 14 bits of page address and highest 2 bits of inner page address
address_byte_1=address>>8;
address_byte_2=address;
address_byte_3=in_page_address;
while(!(read_status_register()&0x80));
AT45DB161_CS=0;
input_8bit(opcom);
input_8bit(address_byte_1);
input_8bit(address_byte_2);
input_8bit(address_byte_3);
input_8bit(0x00);//dump byte
for(i=0;i<8;i++)
{
AT45DB161_SO=1; //first setup the output pin
AT45DB161_SCK=0; //falling eage to read
rdata=rdata<<1;
BIT0=AT45DB161_SO;
AT45DB161_SCK=1;
}
AT45DB161_CS=1;
return(rdata);
}
void write_flash(unsigned char opcom,unsigned int page_address,unsigned int in_page_address,unsigned char wdata)
{
unsigned char address_byte_1,address_byte_2,address_byte_3;
unsigned int address;
address=(page_address<<2)|(in_page_address>>8); //combine 14 bits of page address and highest 2 bits of inner page address
address_byte_1=address>>8;
address_byte_2=address;
address_byte_3=in_page_address;
while(!(read_status_register()&0x80));
AT45DB161_CS=0;
input_8bit(opcom);
input_8bit(address_byte_1);
input_8bit(address_byte_2);
input_8bit(address_byte_3);
input_8bit(wdata);
while(!(read_status_register()&0x80));
AT45DB161_CS=1;
}
我调用写函数，往BUFFER1里面的0地址里面写个0XAA，然后再读出来判断，怎么不对啊。？请赐教啊，项目着急啊。
|
楼主
