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USB device : re-connect after a reset

Posted on March 15, 2013 at 09:28Hello everybody, I have a question about USB device in VCP mode. I would like to keep my VCP communication open after a microcontroller reset (STM32F207). Is it possible ? In example, I have a terminal software runni...

Audio Synthesizer

Posted on October 16, 2013 at 01:45Hey guys,I've recently been designing a synthesizer based on the STM32F4 Discovery board. I'm using a PT8211 DAC for the audio output and an interrupt triggered at 48KHz. My audio is generated using a DDS method an...

harris by Associate II
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STM32F103VCT6 as a CSI (camera) reader

Posted on October 14, 2013 at 20:54hi i am in the middle of an R&D phase setting up a tablet where audio and camera will be controlled by an STM32F as a general-purpose peripheral (status is here: http://rhombus-tech.net/community_ideas/kde_tablet/n...

lkcl by Associate II
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SD file to LCD

Posted on October 14, 2013 at 18:51JPG To SD I'm an absolutely beginner in microcontrollers. I want to display jpg from SD Card. I  create a list file from sd card, but I have no idea for next step Can anybody tell me the next step? Thank You Photo...

stm3223 by Associate II
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How to detect infinite loop in program flow

Posted on October 14, 2013 at 19:48Hi ALL , I have a question that is bugging me lately and i could not find any good solution for the problem. Suppose I have a function , that may or may not , depend on the input and the amount of fixed bugs , to...

RTC reference clock detection

Posted on October 15, 2013 at 14:44Hello,we want to build a system with some STM32F407s. For error memory, it is important that all controllers have the same time. I would like to use the RTC and the RTC_REFIN input to synchronize the RTCs.The RTC w...

DfuSe Demo crashes during Verify

Posted on October 15, 2013 at 12:06Hi I think it is not a problem of Win7. I have the same problem here. I Generate a DFU file with the DFU file manager. Programming with DfuSe Demo works without problems. But when comparing the program crashes. Whe...

rm2399 by Associate III
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STM32L152xD: SPI+DMA transfer with IO trigger

Posted on October 14, 2013 at 15:49I'm new to STM32 so please help Is that possible to trigger SPI+DMA transfer from GPIO? I have RM0038 document and on ''DMA1 request mapping'' (page 213) diagram there are no GPIO pins. I assume that SPIx_RX and S...

keebler by Associate
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memcpy problem

Posted on October 08, 2013 at 13:49Hello,I work with a STm32F417 FreeRTOS + lwip 1.4.0 + 7.1.1.I get crash HardFault_Handler. Sometimes after a few minutes, sometimes after a few hours.There is a screenshot in attachment.I can see that it comes from...

pcu by Associate II
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How to Apply CRC to 8-bit Arrays ?

Posted on October 12, 2013 at 22:03Hello,I am trying to apply CRC to an 8-bit array for creating checksum in order to use in transfer. Since CRC of STM32F4 uses registers as 32-bit, I need to do something tricky.For instance, a 8-bit buffer with 42 ...

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