//芯片探测
static int w25qxx_probe(void)
{
uint32_t i;
uint16_t id;
uint8_t buf[2];
/* read id */
spi_xfer(W25X_ManufactDeviceID, W25QXX_CS_LOW);
spi_xfer(0, W25QXX_CS_LOW);
spi_xfer(0, W25QXX_CS_LOW);
spi_xfer(0, W25QXX_CS_LOW);
buf[0] = spi_xfer(0, W25QXX_CS_LOW);
buf[1] = spi_xfer(0, W25QXX_CS_HIGH);
id = ((buf[0]<<8) + buf[1]);
W25QXX_TRACE("ID:0x%X\r\n", id);
//see if we find a match
for(i = 0; i< ARRAY_SIZE(w25qxx_tbl);i++)
{
if(w25qxx_tbl[i].id == id)
{
/* find a match */
w25_dev.attr = w25qxx_tbl[i];
w25qxx_power_up();
buf[0] = w25qxx_read_sr();
W25QXX_TRACE("SR:0x%X\r\n", buf[0]);
buf[0] = w25qxx_read_sr2();
W25QXX_TRACE("SR2:0x%X\r\n", buf[0]);
// enable full access to all memory regin, something like unlock chip.
w25qxx_write_sr(0x00);
return 0;
}
}
return 1;
}
//芯片探测
int w25qxx_probe(void)
{
uint32_t i;
uint16_t id;
uint8_t buf[4];
buf[0] = W25X_ManufactDeviceID;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
/* read id */
spi_write(&device, buf, 4, false);
spi_read(&device, buf, 2, true);
id = ((buf[0]<<8) + buf[1]);
W25QXX_TRACE("ID:%d\r\n", id);
//see if we find a match
for(i = 0; i< ARRAY_SIZE(w25qxx_attr_table);i++)
{
if(w25qxx_attr_table[i].id == id)
{
// find a match
w25qxx_type.name = w25qxx_attr_table[i].name;
w25qxx_type.id = w25qxx_attr_table[i].id;
w25qxx_type.size = w25qxx_attr_table[i].size;
w25qxx_power_up();
buf[0] = w25qxx_read_sr();
W25QXX_TRACE("SR:0x%X\r\n", buf[0]);
buf[0] = w25qxx_read_sr2();
W25QXX_TRACE("SR2:0x%X\r\n", buf[0]);
// enable full access to all memory regin, something like unlock chip.
w25qxx_write_sr(0x00);
return SPI_EOK;
}
}
return SPI_ERROR;
}
