STM32 MCUs Products

Hi, I am new to the STM32. The function SystemCoreClockUpdate() in the library file system_stm32f10x.c extracts the PLL multipl. factor PLLMUL[3:0] from the RCC_CFGR register. Question: why the '+2' here: pllmull = ( pllmull >> 18) + 2;

void SystemCoreClockUpdate (void){  uint32_t tmp = 0, pllmull = 0, pllsource = 0;  /* Get SYSCLK source -------------------------------------------------------*/  tmp = RCC->CFGR & RCC_CFGR_SWS;    switch (tmp)  {    case 0x00:  /* HSI used as system...

Why is my 512 Hz RTC_OUT_CALIB signal "much" less accurate than the 1 Hz signal?

Trying to generate a 512 Hz signal that is synchronous to the LSE.MCU is an STM32L476ZETx.Measuring the signal on RTC_OUT_CALIB with a Keysight tabletop multimeter. (And also with an oscilloscope.)Observation:Setting "RTC_CALIBOUTPUT_1HZ": measured f...

I want to write a Code in Usart such that If It received "HELLO" It should transmit "HOW ARE YOU " in return . Can anyone help me

I wondering if anyone out there has experienced LSE clock seeming to run fast?

We're using a STM32L4a6 with an ABRACON 32.768KHz crystal (ABS06-127 which is on listed in AN2867 as a compatible crystal) however we seem to be observing error in to order of +200ppm (not the +/-20ppm given in the crystal specs). Using 1p2F caps an...

SPI read is getting right shifted 1 bit of every byte in STM32L476ZGT6 at 20MHZ SPI CLK(SCLK)?

I am working on STM32L476ZGT6 EVAL-Board for transferring data on the SPI to one of the audio codec which is SPI slave. I am trying to read the data from codec at 20 MHz SCLK. I am seeing that the data is getting right shifed 1 bit for of every byte....

ADC1 behaving strangely on a STM32L496AGI6.

Hi forum.I have a question regarding the STM32L496G-discovery board. I want ADC1 to sample PC4 located on the on board Arduino connector, take 10 samples for this example and have the DMA xfer these to memory. I have a CubeIde project set up and have...

Hi Friends, For our 400WH4003ST-M , IPS type LCD I need driver files for ST7701S,Can anyone provide me driver files for ST7701s ??

STM32H7B3 bricked after flashing!

Hi,I'm trying to program code into custom PCB with STM32H7B3.I was first able to connect to STM32H7B3 (read Device ID etc.), but after flashing, the target cannot be found!ERROR: STM32: Connecting to CPU via connect under reset failed.I created code ...

What if callback function is interrupted?

On the STM32L0 I have a callback defined based on RTC alarms. In parallel I have a number of external interrupt (EXTIs) . Scenario Callback function is running due to RTC Alarm interrupt. Now EXTI is triggered as well (or visa verse -> EXTI function ...

I can jump without problem inside the main memory and boot a second software. Can I do the same thing with the SRAM1? I've copied data from main memory (0x0802000 to SRAM1: 0x20001000), but I can't jump to that address