Occasional ContributorNios-V alt_epcq_controller_write() Problem
Hi,
I have a flash on my custom board which is MT25QU01G. The flash is connected to Nios-V/g with Epcq Controller. I am trying to erase, write, read sectors from flash. Before write and erase I unlock all sectors and after write and erase I lock all sectors. The problem is that my alt_epcq_controller_write() returns success(0) however it doesn't write to flash memory. I read same data from same place and it is not changed. I also look that memory from memory browser and still nothing changed. I call erase method before each write method since it is nor flash but nothing happens. Could you please help me about the problem.
Thanks,
Balerion
Hi Balerion,
Regading to avl_mem slave:
If you also place avl_mem slave in Peripheral Region, you can use the current altera_epcq_controller.c file as is.
However, you may want to place avl_mem slave in cacheable (non-Peripheral) region to take advantage of the cache for read accesses. In that case, cache maintenance needed for flash memory write operation in Nios V/g system. Here is a code example (= not fully validated) to achieve this attached (please replace the file extension from ".txt" to ".c"). At the end of the alt_epcq_controller_write_block() function, cache flush function call and error checking are added.
Thanks,
ShoH
