About jose luu

jose luu · 2023-11-19

Hi,What am I missing ?The connection to the event source is grayed and non selectable, see screen copies of the configuration below.

jose luu · 2021-02-25

The ECDSA implementation in cryptolib does not provide means of implementing ECDSA without a random number. RFC6979 is a secure way of doing ECDSA without a random number, it is used in the blockchain implementations (bitcoin, ethereum)

jose luu · 2019-08-04

Hi all,ADC triggering appears to be at half the frequency of the timer, (ie occurs every 2 update events), is this expected ?This is with a STM32F334 progammed using HAL and with code generated by CubeMX.I am reading 14 ADC channels using DMA (2x7 in...

jose luu · 2017-08-25

Posted on August 25, 2017 at 20:14Hi all,The signature algorithms (DSA or ECDSA) all require a random number. If this random number can be guessed, the signature becomes weak and the private key can be recovered (cf. the Sony PS3 signature affair).I...

jose luu · 2016-02-26

Posted on February 27, 2016 at 01:27-removed- case solved #stm32f746-cubemx-timer-tim5

jose luu · 2024-09-11

Does not seem to be available at distributors, do you have a date ?

jose luu · 2024-01-27

Workaround starting with CubeMX 6.9.0 in Project Manager -> Code generator -> After code generation Specify a .bat script located in Core/Src containing: set SCRIPT_DIR=%~dp0% cd %SCRIPT_DIR% copy main.c main.cpp del main.c In -> Before code gener...

jose luu · 2024-01-27

If the script is within the project, begin the script with the lines below, these will set the current directory to where the script is:Windows set SCRIPT_DIR=%~dp0% cd %SCRIPT_DIR% Linux SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >...

jose luu · 2024-01-27

Here is what I use on a STM32G474RE: int main(void) { /* USER CODE BEGIN 1 */ CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; DWT->CYCCNT = 0; // Enable cycle counter DWT->CTRL &= ~DWT_CTRL_CYCCNTENA_Msk; DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk; ...

jose luu · 2023-11-21

Thanks, resolved: SOLUTION SUMMARY: the trick is to *NOT* select "External event 4" in the upper "EXTERNAL EVENT LINES" topic but *enable* "External event 4" in the lower "External Event Configuration" pane.

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G474 problem connecting COMP1 output to HRTIM event4 source

cryptolib : how to implement RFC6979 (derandomized ECDSA) ?

adc trigger on timer is at half frequency

weakness in the signature algorithms on non-accelerated hardware in the cryptographic library

-removed- case solved

Re: Advanced NFC tags with blockchain-compatible digital signatures protect product authenticity

Re: There is a plan to allow STM32cubeMX for generating main.cpp instead of .c only ?

Re: STM32CubeMX Processing Before and After Code Generation

Re: Using CYCCNT in STM32G491RE

Re: G474 problem connecting COMP1 output to HRTIM event4 source