STM32 MCUs Products

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Forum Posts

DMA from stack, why not?

Posted on August 20, 2013 at 20:03Hello, I was writting a driver for SPI transfer using double DMA ... to test it I wrote a few lines of code that prepared a buffer (locally), and sent it over SPI. The result was the first 4 bytes were ok then the d...

root by Associate II
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  • 1 replies
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STM32F407 - 2 RAM banks

Posted on June 11, 2013 at 23:11I have a stupid question: F407 has 2 RAM banks - 128K with DMA access, and 64K no DMA access. 1) I saw that in all examples only the 1st bank used. 2) I saw that in all IAP Firmware Upgrade exampler, bootloader search...

alexandr by Associate II
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  • 5 replies
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STM32F205 and USB virtual com port problem

Posted on August 13, 2013 at 14:36 Hi all,  I'm using STM32F205VGT,STM32_USB-Host-Device_Lib_V2.1.0 and virtual com port driver ''VCP_V1.3.1_Setup_x64.exe''. The PC works with Windows 7/64bits. When I start USB device the initialization of USB start...

donev_g by Associate II
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User button

Posted on August 19, 2013 at 12:18hello i'm trying to make the user button working with a simple led program here is the code and please tell me what's the problem (it worked just when i keep pushing user button then make a reset): ****************...

STM32F3 - AN4296 - ISR FROM CCM RAM USING IAR

Posted on August 20, 2013 at 02:38Hi,I would like to receive a working project the demonstrate how to execute an interrupt handler from CCM RAM using EWARM. I tried the procedure from AN4296 section 2.2. The project compiles,  but when the ISR is tr...

Asantos by Senior
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  • 1 replies
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Calculate delay

Posted on August 14, 2013 at 21:24hello how can i calculate a delay of 1 second if i have this parameters: SYSCLK(Hz)                             | 168000000   *-----------------------------------------------------------------------------   *       ...