Flowcode Support Board

Hello I use Atmega128 processor and AT25F4096 memory.
Writing to memory works correctly but reading always returns 1.

Found my mistake, but the question remains...

Hello,

You might need to erase the block first before you try and program the location. Though 255 would potentially indicate an unprogrammed location.

Erasing does nothing!
Cleaning up didn't do anything either.
Made a write / read loop and the loop stops.
the program hangs. Recording doesn't work.
Only reading works.

Hello,

What do you have the WP pin connected to?

WP connected to VCC

Everything works in Proteus but not in hardware.
If connected according to the data sheet, the MISO and MOSI pins are reversed

When connected according to the datasheet, there is not even a read.
And if the pins MOSI and MISO swap places, the chip returns 255. This is the default value.
In the program you can see that I set the value to 0 and the return value to 255. So the reading is done. But the sector is not unlocked and therefore not written.
Respectfully Osta

Moreover, the program makes one iteration and stops at one of the commands.

It's in PROTEUS.