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M25p40 NOR FLash Driver - SSP Read and write Problem

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raj_jack

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Hi,

I am using st micro controller (spear300) . While reading data from NOR flash ( M25p40 ) data is 0xFF
Write operation is not working at all . Read Device id and Read electronic signature is working fine

What will be the reason for read and write operation ...?

please help me .

Thanks
Rajx:shock:
 

Erased data reads as 0xff, in so far reading may be correct. Regarding write operation, there may be either a problem of incorrect enable sequence, missing hardware enable or sector write protection.
 

flash contains data . Because I ported Linux and tested then data could be read and write properly .
Here I am facing problem with ThreadX
 

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