About Mr_M_from_G

Mr_M_from_G · 2024-06-20

I have an issue when changing the option bit of STM32H742 to change the RDP level to 1.I read out option bit from register FLASH->OPTSR_CUR, change the RDP bits to eg 0xBB, write the result to FLASH->OPTSR_PRG and then set bit FLASH_OPTCR_OPTSTART in...

Mr_M_from_G · 2024-05-24

I implemented a ECDSA signature generation and checking on STM32H743ZI NUCLEO using STM32CubeExpansion_Crypto_V4.2.0 library example ECDSA_SignVerify.I did similiar with Python using https://pypi.org/project/ecdsa/Unfortunately signature generated by...

Mr_M_from_G · 2023-01-04

For a while there have been two Nucleo boards for STM32H743 due to a revision change of the chip (rev Y -> rev V) While NUCLEO-H743ZI held rev Y NUCLEO-H743ZI2 (note the 2 at the end) held rev VThis is stated also in the Nucleo data brief that says n...

Mr_M_from_G · 2023-01-02

Hello all,I have trouble running FDCAN on an STM32H742VG rev V when the cpu clock is above 300 MHz. I have D1CPRE = DIV1HPRE = DIV2D2PPRE1= DIV2leading to the maximum allowed APB1 peripheral clock (= fdcan_pclk) for cpu clock >= 300 MHz (75 MHz for c...

Mr_M_from_G · 2022-11-14

I had a hard time the last days struggling with STM32G07 bootloader.Finally I came to this conclusion:I have option bit nBOOT_SEL cleared (unckecked in STCubePorgrammer) and even though this bit is long cleared ie several power cycles have been done ...

Mr_M_from_G · 2024-06-21

Further investigations:When my STM32H7 has RDP level 1 set and I try to read it out with STM Cube Programmer (simply click Connect, confirm the read out error message and click disconnect) a following hard reset on NRST has no effect.So it seems this...

Mr_M_from_G · 2024-06-20

Python's ecdsa function verify always does a hash internally, I needed to use verify_digest.

Mr_M_from_G · 2024-05-24

My fault, I was using one curve with keys generated for another...

Mr_M_from_G · 2024-05-24

Same issue for me.The first post shows that the op used CMOX_ECC_CURVE_SECP256K1 -> ! K1 !I have the issue that a cmox_ecdsa_verify with K1 fails although a cmox_ecdsa_sign produces the identical signature.With R1 there are no issues.In case of inter...

Mr_M_from_G · 2023-01-23

The complete situation regarding the H7 family or the CANFD peripheral is unclear. Currently we could only see it on H742/3 in 100pin LQFP package.The only different thing we tested was a H743 in a NUCLEO board, but this one was > 2 years old so like...

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STM32H7 CPU stall after RDP level change

Searching counterpart for STM32CubeExpansion_Crypto_V4.2.0 ECDSA

Which is the current STM32H743 Nucleo board?

STM32H7 FDCAN clock issue

STM32G07 bootloader not starting

Re: STM32H7 CPU stall after RDP level change

Re: Searching counterpart for STM32CubeExpansion_Crypto_V4.2.0 ECDSA

Re: X-CUBE-CRYPTOLIB: ECDSA invalid public key format

Re: X-CUBE-CRYPTOLIB: ECDSA invalid public key format

Re: STM32H7 FDCAN clock issue