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P4080 Nor Flash Read/Write Routines In Uboot

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P4080 Nor Flash Read/Write Routines In Uboot

‎03-19-2018 01:16 AM
1,096 Views
yyurtcan
Contributor III

Hi,

I have been working on u-boot for p4080ds board. Where can I find Nor Flash Read/Write routine in u-boot?

Best regards.

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3 Replies

‎03-19-2018 06:15 AM
948 Views
ufedor
NXP Employee
NXP Employee

Please refer to the  u-boot/include/mtd/cfi_flash.h

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‎03-19-2018 10:16 AM
948 Views
yyurtcan
Contributor III

 I have seen read,write other needed routines in u-boot/include/mtd/cfi_flash.h.  I want to also know how chip select 0-7 are drived. In default, chip select 0 is changed during read/write from nor flash. I want to also drive chip select 1 which is always high. How to make it low? What would you suggest for that?

Best regards. 

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‎03-21-2018 12:16 AM
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yyurtcan
Contributor III

How to assert/negate LCS_B[n] where n can be 0-7? It is observed that only LCS_B[0] is asserted and negated. In addition, I want to also assert/negate LCS_B[1] signal. How can I do that?

Best Regards.

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