About RHaag.1

RHaag.1 · 2021-02-10

Hello,On a STM32L4 design, we no longer have an SWD connection to the processor: using STM32CubeProgrammer reports ST-LINK SN : 39FF6A064243383912381057ST-LINK FW : V2J36S7Voltage : 3.26VSWD freq : 4000 KHzConnect mode: NormalReset mode : Software re...

RHaag.1 · 2021-02-08

Hello,during qualification tests, our design with STM32 L4 first went through XRay tests and afterwards even CT to check for soldering problems etc.XRay was fine, but we have an issue with CT were the controller quit function afterwards. Not even a J...

RHaag.1 · 2021-03-02

Hi Houda,it's a valuable discussion, but I still don't know the RDP value when the comparission doesn't match. I know it can be "my" 0xFF, but I'm quite sure ST implemented a certain value in this case not a "could be anything except..." RegardsRalp...

RHaag.1 · 2021-02-24

Hi Houda,hm, is there an error in the ref manual with level 0 / 1 here?Anyhow, I know programming any value other than 0xAA and 0xCC will lead to level 1, but I'm sure ST knows what value I should read back in assumed case with mismatch in comparison...

RHaag.1 · 2021-02-23

Hi Houda,RM0351 3.4.2 Option bytes programming says:If the comparison between the word and its complement fails, a status bit OPTVERR is set.Mismatch values are forced into the option registers:...For RDP option, the value of mismatch is the default ...

RHaag.1 · 2021-02-23

Hi Houda,I know about the writing of option bytes and this is a very rare case in our application. But thanks for pointing out that both BfB2 and RDP are located in the same register, had not really realized that! Also read the option bytes chapter i...

RHaag.1 · 2021-02-22

Hi Houda,I'm always connected via SWD (see my update below...) and yes, user flash can be read again after setting RDP to level 0.My app can write a small part of OBs user byte: the bit BFB2 to switch between flash banks.By the way: how are options b...

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SWD connection no longer working

Experiences with STM32 and XRay or CT

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Re: SWD connection no longer working

Re: SWD connection no longer working

Re: SWD connection no longer working