STM32 MCUs Products

Wrong data on I2C 2 ?

Dear Members,I got a wrong data on I2C 2 for LCD, the first time it was ok, after a while it becomes like in the photo, what do you think the cause of it ?I have put a pull up resistor for it 10K, and the speed is 100KHz,I2C1 for Accelerometer and te...

Subsecond resolution alarm on a RTC without subseconds (STM32L152 Cat.1)

HiTimekeeping in my application is pretty standard: 32 bit unsigned integers which store milliseconds since boot, overflowing every 49 days.To reduce power consumption, i need a way to wake up from stop mode at a set time in ms. But my device has nei...

hi, i want to know more about the oscillators behind the micro controller STM32F765, is the external oscillator needed? or the internal oscillators are enough ?

GPIO interrupt keep systick interrupt from occuring?

Hi, Im senior engineer using stm32, maybe, not newbee.I know that Higher interrupt priority can occur when mcu still process lower interrupt.Higher interrupt , i mean, lower priority value in nvic register.but just now, I found gpio interrupt can dis...

ADC Sampling rate understanding

I do not understand the difference between the different sampling rates (cycles3 - cycle480). I know it is related to the time given for the ADC capacitor. I also realise that more time should mean more stable reading. I ran some quick tests and I f...

Output of STM32F100RB DiscoveryVL board when connected to 3v3 converter only shows from 2.58 to 3.19 volts on the input and alway 5v on the output of converter.

I have a Value Line Discovery board - STM32F100RB and three of the outputs are connected to a 3v3 converter to get a 5v output. I have tried another controller board with 3v3 outputs to drive the convertor board and I get a clean signal. (Either 0 or...

Can't erase flash on STM32407VG Discovery

I'm a bit lost by this one. I can write to the flash but cannot erase a sector. I can erase sectors with the ST-Link Utility. The result codes at every step indicate success, but the flash is not actually erased. I am using the Standard Peripheral Li...

We are developing a project that logs the GPS NMEA output. Instead of SD card, we have used Quad SPI FLASH memory to store the logs 1. Is it possible to implement FatFs in quad SPI FLASH memory? 2. If yes, please share the example resources.

How can I decrease the current consumption of STM32L431RBT6?

I am using STM32L431RBT6 consuming 2.63mA of current. How can I further reduce the current consumption ?. I am using MSI at 8 Mhz , and peripherals used are SPI1, SPI2, UART and I2C.