STM32 MCUs Products

STM32F439 USART really don't have a dedicated pin to control RS485 PHY direction?

I2C Slave ISSUE on STM32L0

Hi everyone,I am trying to develop a Master-Slave system using two Nucleo-L053R8 boards. The first one is the master, which sends a command to the Slave board whenever the onboard button is pushed. Each time a new message is received, the slave board...

STM32F302 does not release SCL on Arbitration Lost Error (ARLO) in Slave Mode

Hello,I'm using a STM32F302RBTx in IC2 Slave Mode with Clock Stretching Enabled.In general the Communication with a Master works fine. During testing the following problem appeared: When an Arbitration Lost error is introduced, the Slave detects this...

I need to know what are the limits for setting the sub-second RTC resolution?

I am planning to use a STM32F746xx device with PTPV2 time synchronization methods and am wondering if I can maintain the on-board RTC sync to at least 1 millisecond resolution or smaller. I see there are various setup registers to scale the clocks ...

STM32H743 ADC calibration timeout

Posted on May 17, 2018 at 18:07My ADC clock is 25 MHz andHAL_ADCEx_Calibration_Start(&hadc1, ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED) will return an error due to ADC_CALIBRATION_TIMEOUT being exceed I changed the value from 64000 to 640000 and ...

uSDCard on STM32F746G-DISCO

I am working with STM32CubeMX 4.26.1 and uVision V5.25.2.0 on card STM32F746G-DISCOFirst, I use the program given in example “en.stm32cubef7\STM32Cube_FW_F7_V1.12.0\Projects\STM32746G-Discovery\Applications\FatFs\FatFs_uSD�?This example works but I c...

Custom Bootloader for STM32F3xxx Series

Hi,Does anyone know if it's possible to replace the default bootloader that ships with the controller with the custom one? I searched the net, and the answer I get is that it's not possible. I may be wrong.Also, I could not find the source code for t...

STM32L051 EEPROM initialisation

Is it possible to initialize the EEPROM area of a STM32L051 with values at compile time (IAR compiler) simply like this:const char array[] @ "my_eeprom" = {0X1C,0X1F,0X9F,0XFF};

can't use TIM21 as pulse counter STM32L051

I try to count pulses from PA1 as TIM21_ETR, seems like all setting is OK, but no counting what soever. What am I missing?Thanks/* TIM21 init function */ void MX_TIM21_Init(void) { TIM_ClockConfigTypeDef sClockSourceConfig; TIM_MasterConfigTypeDe...