STM32 MCUs Products

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Forum Posts

Clock problem

Posted on October 28, 2013 at 10:53I work with STM32F103RBT6. In stm32f10x.h i set  #define STM32F10X_MD, it leads us to : #define SYSCLK_FREQ_72MHz 72000000 in system_stm32f10x.h. So SystemInit() function should go to SetSysClockTo72(). However on ...

jenya7 by Associate II
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SystemCoreClock Reading incorrect value?

Posted on October 25, 2013 at 10:54Hi, I am working with STM32F401 discovery board. I set up the system_stm32f4xx.c file so that the system clock becomes 84MHz(I used Excel based stm32 clock generator tool to get PLL values). void Delay(uint32_t dl...

Suggested settings for PDM filter at 8KHz sampling

Posted on July 29, 2013 at 23:52What limitations are there within the PDM filter library? I'd like to be able to record with FS at 8KHz...the original project files show 32KHz spi configuration but FS at 16KHz and the low cutoff at 8KHz; if I want t...

STM32_USB-FS-Device_Lib versus STM32F10x_StdPeriph_Lib

Posted on October 27, 2013 at 15:00Hello,I am compiling with the ARM GNU toolchain for the STM32F103 family, and want to adopt CMSIS as I believe that is will ease programming after I climb its learning curve.It appears that the STM32_USB-FS-Device_...

pgregson1 by Associate III
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Input Capture Example for STM32F303

Posted on October 26, 2013 at 10:33Hi,Dear all, I am new to this series. Specially I am unable to find examples on it for this version and I have a limited time to implement input capture to measure frequency between 210KHz-510KHz.I am using Timer 1...

contact2 by Associate II
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  • 1 replies
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Issue on use DFU on STM32L Discovery

Posted on October 25, 2013 at 18:34Hi, I am working on the DFU recently.1. I modified a STM32L Discovery board with STM32L152RBT6 to have USB capaility. http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/PF2509902. Then I loaded the ''Device_Fir...

SD Card Bootloader, FAT FS Filesystem, USB Mass Storage

Posted on August 27, 2011 at 08:10I have been reading and learning on this forum for awhile as i worked through my first decent size project with the STM32. I thought it was about time i posted up here and contributed some code :) I have just got a ...

VCP driver without SOF output?

Posted on October 23, 2013 at 17:22Hi all I've a little problem. I use the USB driver from st to communicate with my STM32F4-Discovery. This works realy good. But I've would make a streaming protocol with a camera sensor. For this I have to use the ...

pa by Associate II
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  • 10 replies
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Cortex M0 SPI Config

Posted on October 25, 2013 at 16:06Hello, i'm trying to use the SPI Communication. I have followed the instruction from the reference manual. But there is still a problem to write the tx data. When i use the debug mode the SPI1->DR will not be writt...

sascha by Associate
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  • 1 replies
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Problem with DMA-USART Rx on STM32F407VG ?

Posted on October 01, 2013 at 09:58Hello, I am trying to read data from USART using DMA. Receive buffer (DMA_BufferSize) in my code is 4 bytes, but even when 1 byte of data received, MCU is interrupted with Transfer Complete flag (DMA_IT_TCIF1). Giv...

eraycanli by Associate II
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  • 5 replies
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