help me about cfi

hello rugbybloke

i follow your suggestion:stick a break point in the function alt_flash_cfi_init in the altera_avalon_cfi_flash component.

when step into alt_read_cfi_width(alt_flash_cfi_dev* flash) in the altera_avalon_cfi_flash_table .c

when execute :

for(i=0;i<3;i++)

{

byte_id[i] = IORD_8DIRECT(flash->dev.base_addr, 0x10+i);

}

the result of the byte_id[0] =.

byte_id[1] =.

byte_id[3] =.

and ret_code = -ENODEV; the ret_code is " -19"

fd = alt_flash_open_dev(EXT_FLASH_NAME); the fd =0

i don&#39;t know what is the reason. my board is :Stratix dsp s80 dev. board rev. 1.2

the flash is: am29dl640d

the only reason i think i don&#39;t config the flash right.

help me!