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STM32H7 APB and AHB peripheral clock limits

What are the upper limits on the APB and AHB peripheral clock on a STM32H743 ?According to figure 46 of the reference manual:the limit is 240MHz (or 200Mhz depending on the silicon revision I assume ?).However STMicro HAL example set the APB and AHB ...

Gpeti by • Senior II
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  • 3 replies
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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...

YZhon.1 by • Associate II
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  • 3 replies
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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...

Cl.1 by • Associate II
  • 409 Views
  • 0 replies
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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...

LSchm.1 by • Associate II
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  • 9 replies
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Resolved! STM32F1 PC14 and PC15 don't be output ?

Posted on February 21, 2018 at 13:01Hi;I have a problem.I want to be output pins PC14 and PC 15, so make the registers PWR -> CR = 0x00000100, RCC-> BDCR = 0x00000000. probably  LSE ocillator isn't off. thim my code :#include 'stm32f10x.h'#include '...

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