STM32L431 Flash reading problem

[eric2]

Posted on January 09, 2018 at 11:43

Hello,

I have a problem with my bootloader. At the first launch I write a 64 bit word in flash in 0x8004030. I was able to check with J-Mem to make a dump of the memory and it flash writing OK.

If I read the value at this address in 0x8004030 there is 0xfffffffff.

In assembler I have:

ldr r2, [r5, # 0]

R5 = 0x8004030

and the result in R2 is 0xffffffff wich is wrong.

And if I read the value at this address in 0x00004030 there is good value.

why there is not the same value in 0x08004030 when 0x00004030?

Thanks,

Eric