STM32 MCUs Products

Unable to wake-up from stand-by using pin wake-up

Hello,I'm using STM32F779NI.I'm trying to enter Standby mode & would like to wake-up through pin wake-up (PC13).Looks like stand-by entry is happening fine (SBF is set post reset) but wake-up pin flag is not set.Please find the code as belowint main(...

STM32H743 DMA have some bug when I using lastest HAL lib

We check stm32h7xx_hal_spi.c, and Surprise that the lastest HAL Lib still not support HAL_SPI_DMAStop() and HAL_SPI_DMAResume(). It is very important. We found DMA_SxCR's EN bit out of control in some time.  We use DMA to send and receive spi dat...

DMA Performance

Do some homework assigned by the lecture but have no direction so ask for some help.I need to write a function DMASpeed() to demosntrate the speed improvement of DMA over a software loop for memory to memory transfers. I include polling DMA for my ho...

STM32L073 - Init RTC via external clock (PC)

Hi, ​My client has an existing circuit which is logging some data (no information given)Until the logging just has a counter which starts, when a power source is connected.Now they want to add a real clock to the logging entry, and I saw that the STM...

I'm trying to use the MultibufferDMA mode of HAL driver for STM32F769 device. There's not a single example I could find which uses this mode in the list all the applications/demos/examples for STM32 devices. Here's an example call I use :

 // using Double-Buffer DMADMA_HandleTypeDef hdma ;StreamBaseAddr = DMA_CalcBaseAndBitshift(&hdma) ; // get the stream base addr if (HAL_DMAEx_MultiBufferStart_IT(&hdma, StreamBaseAddr, Buffer[0], Buffer[1], BUF_SIZE))     {       Error_Handler();   ...

Hi, I would like to write a utility code for stm32 flashloader application in linux, so that firmware can be downloaded to stm32 thorugh UART using commands. For linux, i need .so of flashloader application. where can i get it?

Linker Time Optimization introduces glitch/noise into Timer DMA controlled PWM

Hello,I have an application on an STM32F042 microcontroller, and it uses Timer 2 configured as PWM output and is transferred over DMA.To fit the whole code into the small 32 KB flash memory, I am forced to use -flto (Linker time optimization). Howeve...

DMA to receive unknown length frames with UART

HiI need to listen to Rx UART to receive unknown length frames (I will search for a frame start byte, then read the frame size and then test a CRC for frame validating)I would like to use DMA for performance but I only see half or full reception int...

SPI Transmit only last word of byffer

HiI'm trying to transmit 4 16-bit words via SPI as slave using interrupts and HAL.I'm using STM32F107VCT6So I specified a buffer:uint16_t buf[] = {0x000F, 0x00F0, 0x0F00, 0x0004};And started to transmit in main:MX_SPI2_Init(); HAL_SPI_Transmit_IT(&hs...