Writing to EPCS sectors

Hello, all,

I have been struggling with this and I hope someone can shead some light.

My project has a 3C25 along with a EPCS16 device. I would like to write some data to the EPCS16 somewhere around sector 20.

Every time I try to write I end up with data being written to sector 0.

I should also mention that I am using the block erase, write_block

and read epcs functions

I noticed that the alt_epcs_flash_write_block function in the in the

altera_avalon_epcs_flash_controller.c has the following comments:

/* Write, assuming that someone has kindly erased the appropriate

* sector(s).

* Note: "block_offset" is the base of the current erase block.

* "data_offset" is the absolute address (from the 0-base of this

* device's memory) of the beginning of the write-destination.

* This device has no need for "block_offset", but it's included for

* function type compatibility.

*/

I am concerned about the part of the comment that says the device has no

need for block offset. Like I said I want to erase and write to sector 20.

alt_epcs_flash_write_block(alt_flash_dev* flash_info, int block_offset,

int data_offset, const void* data,

int length)

I am setting the int block_offset to 20.

Thanks for any suggestions.

JTA1