//#endif
int Mem_Check(unsigned long offset)
{
static rt_uint16_t test_data[2] = { 0x55AA, 0xAA55 };
rt_uint16_t tmp = 0x3C3C;
int ret = 1;
if (offset<PSRAM_CY) {
Mem_Wr ( test_data[0], offset);
Mem_Rd ( &tmp, offset);
if (tmp != test_data[0])
ret = 0;
Mem_Wr ( test_data[1], offset);
Mem_Rd ( &tmp, offset);
if (tmp != test_data[1])
ret = 0;
}
return (ret);
}
static rt_err_t nand_mtd_read(
struct rt_mtd_nand_device * dev,
rt_off_t page,
rt_uint8_t * data, rt_uint32_t data_len, //may not always be 2048
rt_uint8_t * spare, rt_uint32_t spare_len)
{
rt_err_t result=RT_EOK;
int i;
rt_mutex_take(&nand, RT_WAITING_FOREVER);
if (data != RT_NULL && data_len != 0)
{
// get offset of sst39vf's read position
rt_uint32_t page_offs = page*512;
if(data_len>512 && data_len<=528)
{
//read back both main data and spare data
rt_uint32_t spare_offs = page*16 + NOR_SPARE_BLOCK;
for(i=0;i<256;i++)
Mem_Rd((rt_uint16_t *)data+i,page_offs+i);
for(i=0;i<(data_len-512)/2;i++)
Mem_Rd((rt_uint16_t *)data+256+i,spare_offs+i);
}
else
{
for(i=0;i<data_len/2;i++)
Mem_Rd((rt_uint16_t *)data+i,page_offs+i);
}
}
if (spare != RT_NULL && spare_len != 0)
{
rt_uint32_t spare_offs = page*16 + NOR_SPARE_BLOCK;
for(i=0;i<spare_len/2;i++)
Mem_Rd((rt_uint16_t *)spare+i,spare_offs+i);
}
rt_mutex_release(&nand);
return result;
}
static rt_err_t nand_mtd_check_block(
struct rt_mtd_nand_device* device,
rt_uint32_t block)
{
rt_err_t result=RT_EOK;
rt_uint16_t bad;
rt_uint32_t spare_offs = NOR_SPARE_BLOCK+block*32;
rt_mutex_take(&nand, RT_WAITING_FOREVER);
Mem_Rd(&bad,spare_offs);
rt_mutex_release(&nand);
return ((bad&0xff)==0xff) ? RT_EOK:RT_ERROR;
}
