STM32 MCUs Products

i2c clock; how to config ?

in RM0008 Rev 21page 775Bits 5:0 FREQ[5:0]: Peripheral clock frequencythe description of the frequency divider is extremely unclear. there is no formula for where the input is, how it is divided, where the output is. what if I want to set strictly 50...

random number 0 to 255.

Hi! i want generate a random number into 0 to 255, i want use the random number for rutine neopixel color. i can use the rand() c function? the eand() function not generate number 0 to 255. Not need to be in ordem ascend or descend.

Firmware source code *** boom for STEVAL-DPSLLCK1?

Hello, are the firmware source codes for STEVAL-DPSLLCK1 available?There is a diagram in the Data brief, but it does not contain more information about the main transformer, CT, etc., is there a complete boom of components?I didn't find it on the web...

On the STM32U5xx, keep ADCx->CCR PRESC = 0, do not use the prescaler.

I'm using the ADC1 and ADC4 with PLL as kernel clock (MSIS 24MHz pll'ed to 32768 Hz watch crystal / 2 x (11 + 2163/8192) / 24) = 5.632 MHz). The ADC1 in combination with the MDF "looses" every second sample. The ADC4 never gets ready. The errata shee...

Nor-flash external loader problem.

Hi,I followed the "How to create an external API loader MOOC" videos and after some struggle I managed to get it working for a board using the H7 with an Infineon S25FL127 memory.When I tried to do the same using a board with the G4 and with the same...

SDRAM : Some data not writting correctly

I am working on STM32H745BIT6 with W9812G6KH-6 SDRAM 16bit data bus. I have initialised the SDRAM and HAL driver seems to be returning HAL_OK so seems it is initialised properly.I write incremental data and read back. Observed some of the data not ge...

Step-by-step instruction how to compile stm32 programm without IDE

Dear collegues, could you share the step-by-step instruction how to compile Stm32 program without IDE?

Dear Sir,I am using STM32L452RET6 for the SD card interface in SDIO with BUS_WIDE_4B mode in interrupt mode.You can find attached .ioc file for the reference. I am writing 512 bytes using f_write function then it takes time to write approx 13mili sec.

Need help with example code. I'm trying to do simultaneous ADC sampling on 3 analog inputs at 80KHz for 80 samples. Like to kickoff sampling on trigger from analog comparator. DMA samples to buffer and interrupt when buffer is full.

Thinking STM32G7474xx wound be a good fit but not sure. Need M4 CPU with FPU and low power modes. Like to have MCU in low power mode until buffer full. Any help would be greatly appreciated! I am new to ST MCU tools and not sure even where to begin....

which JSON library is good for generating and parsing for ST Micro controllers

Hello everyone i am building project which is use to monitor the room temperature and humidity and CO2 level but i want send this data into JSON format to web server but i didn't find the any library that generate and parse data for stm32 micro cont...