Вот пытаюсь писать данные во flash.
вот процедуры:
void AT45_write_buffer_begin(unsigned int addr)
{
AT45_CS_ON;
AT45Ready();
SPI_Write_Byte(BUFFER_1_WRITE); // ok
SPI_Write_Byte(0x00);
SPI_Write_Byte((char)(addr>>13));
SPI_Write_Byte((char)addr);
}
void AT45_buf_to_mem(unsigned int addr)
{
AT45_CS_ON;
AT45Ready();
SPI_Write_Byte(BUFFER_1_TO_PAGE_WITH_ERASE); // ok
SPI_Write_Byte((char)(addr>>8));
SPI_Write_Byte((char)(addr<<3));
SPI_Write_Byte(0x00);
AT45Ready();
AT45_CS_OFF;
}
void WRITE_BUFFER1_TO_MEM(unsigned char *m, unsigned int page)
{
unsigned int i;
AT45_write_buffer_begin(0);
for (i=0;i<PAGE_BYTES;i++)
{
SPI_Write_Byte(m[i]);
}
AT45_CS_OFF;
AT45_buf_to_mem(page);
}
void AT45_read_buffer_begin(unsigned int addr)
{
AT45_CS_ON;
AT45Ready();
SPI_Write_Byte(BUFFER_1_READ); // ok
SPI_Write_Byte(0);
SPI_Write_Byte((char)(addr>>13));
SPI_Write_Byte((char)addr);
}
void AT45_mem_to_buf(unsigned int addr)
{
AT45_CS_ON;
AT45Ready();
SPI_Write_Byte(MAINPAGE_TO_BUFFER_1); // ok
SPI_Write_Byte((char)(addr>>8));
SPI_Write_Byte((char)(addr<<3));
SPI_Write_Byte(0x00);
AT45Ready();
AT45_CS_OFF;
}
void READ_BUFFER1_FROM_MEM(unsigned char *m,unsigned int index,unsigned char count, unsigned int page)
{
unsigned int i;
AT45_mem_to_buf(page);
AT45_read_buffer_begin(0);
for (i=index;i<PAGE_BYTES;i++)
{
if(i<(index+count))
{
m[i-index]=SPI_Read_Byte();
}
else SPI_Read_Byte();
}
AT45_CS_OFF;
}
#define PAGE_COUNT 8192
#define BLOCK_COUNT 1024
#define PAGE_BYTES 1056
#define BUFFER_1 0x00
#define BUFFER_2 0x01
#define BUFFER_1_WRITE 0x84
#define BUFFER_2_WRITE 0x87
#define BUFFER_1_READ 0xD1
#define BUFFER_2_READ 0xD3
#define BUFFER_1_TO_PAGE_WITH_ERASE 0x83
#define BUFFER_2_TO_PAGE_WITH_ERASE 0x86
#define MAINPAGE_TO_BUFFER_1 0x53
#define MAINPAGE_TO_BUFFER_2 0x55
#define PAGE_ERASE 0x81
#define BLOCK_ERASE 0x50
#define SECTOR_ERASE 0x7C
вот текст программы:
spi_init();
while(1)
{
TxData1(at45ReadVID());
TxData1(at45ReadStReG());
Del(1000);
if(g==0)
{
g=1;
AT45Mass[1]=0x0a;
AT45Mass[200]=0x0b;
WRITE_BUFFER1_TO_MEM(AT45Mass,10);
Del(1000);
AT45Mass[1]=0;
AT45Mass[200]=0;
READ_BUFFER1_FROM_MEM(AT45Mass,0,220,10);
TxData1(AT45Mass[1]);
TxData1(AT45Mass[200]);
}
}
выводятся нули. регистр статуса и id считываются. я такж епробовал записать в буфур 0 и потом считать оттуда - работало. а вот через память не получаеся. подскажите что не так ?
AVR и AT45DB642D-SU, Не пишется инфа во flash
May 18 2009, 03:24
С адресами там все неправильно.
