STM32 MCUs products

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DMA triggered DMA

Posted on March 05, 2014 at 11:32Hey everybody, Is it somehow possible to start/enable/trigger a DMA transfer with the help of another DMA transfer? I'm thinking of the following scenario: - DMA transfer 1 is timer triggered (every 1us) and transfer...

SPI RX Buffer via DMA Too Big

Posted on February 13, 2014 at 14:07I've set up my DMA to transfer 106 half-words via the SPI to a memory buffer. I am quite confident that my buffer size is correct. However, when the transfer actually occurs, it is twice the size I expect (and is ...

jvavra by Associate III
  • 15 replies
  • 0 kudos

SPI Clock via DMA

Posted on February 07, 2014 at 00:02I'm using a DMA for the first time (on a STM32F427), and am having a bit of trouble: I don't see SCK on any of my four SPIs when trying to transfer data via the DMA (specifically, I've only tried on the Tx side so...

jvavra by Associate III
  • 13 replies
  • 0 kudos

DMA setup time and interrupt latency

Posted on January 07, 2014 at 06:07hi there, I am running an issue about using DMA to transfer data bytes from ports to internal RAM at 12MHZ. I have succeeded in doing so, but I loose first few hundred of data bytes in doing so. Can this could be a...

UART4 with DMA Rx Interrupt

Posted on January 09, 2014 at 09:30Hi ,I'm trying to use UART4 with DMA Rx Interrupt , and using stm32f103zg microcontroller. but i couldn't find any example project for this in here.Could anyone help me about this matter ? #dma #stm32

Extra interrupts generated when using DMA and SPI?

Posted on January 07, 2014 at 02:03I have a STM32 discovery board configured in slave mode receiving commands over SPI. When it receives a specific command byte, it activates DMA and sends back a set number of bytes back. I have a print statement at...

2channels ADC + DMA + TIMER

Posted on January 04, 2014 at 22:51 Hello, I would like to sample 2 analog channels with 100kHz (STM32F429 disco). I found examples only with one channel. I tryed to edit it, but my code dont work. If I placed breakpoint into DMA2_Stream4_...

tom23 by Associate II
  • 11 replies
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STM32 USART2 per DMA Problem

Posted on August 30, 2012 at 16:41I have a problem that maybe someone can help with. I've spend the last few days on this and I just don't understand why it's not working. I have a STM32 where I want to send out a buffer over USART 2 using DMA to a ...