QSPI External Loader WriteMemory Fail

[YCF.1]

I use STM32H750B-DK to do external loader function.

"H750_External_Loader.zip" is my test code.

On below have error happen, I got error while memcmp

 

That's the code that I've used as my base:

https://github.com/WellinZHANG/External_Loader

QSPI Setting

 

EVM STM32H750B-DK Flash

[SofLit]

Dear @YCF.1​  (Community Member)​ 

Please double check if you're not in the case of the errata "2.4.4 Memory-mapped read of last memory byte fails". If yes, please configure FSIZE the double size of the real size of your memory.

SofLit

[YCF.1]

Hi Soft.it~

The issue may be memory ​mapped fail, because I try to

memcmp(buffer_test,(uint8_t*) (0x90000000 + var * MEMORY_SECTOR_SIZE),1) still fail.

[Tesla DeLorean]

The memory mapping needs to be working

https://github.com/WellinZHANG/External_Loader/blob/main/QSPI%20testing/main_test.c#L36

If it's already failing at the first byte then perhaps the command/template is wrong.

Check dummy cycles, command format, etc.

On the H7 there's an issue at the end of memory, about 32-bytes / cache-line that has an errata issue, but you'd need to be using the whole memory.

[YCF.1 · Accepted solution]

This issue had to solve.

The code had some error, must change code like below.

Thanks.