About h2

h2 · 2014-05-06

Posted on May 06, 2014 at 12:11Hi community, I use the USART1 in STM32F100C4 to receive serial data in DMA mode. Because the data comes in packets with less than 16 bytes I start the DMA mode every time, when new data is expected. This works most of...

h2 · 2014-05-12

Posted on May 12, 2014 at 19:36Hi Jan, the errors (USART, Timer) seems to correspond. If I disable and enable the USART_DMAReq_Rx my error disappeares. If you disable and enable TIMx_DIER_CC1DE your error disappeares. In both cases DMA request enabl...

h2 · 2014-05-12

Posted on May 12, 2014 at 15:55Sorry Jan, I forgot, before the snippet i send: USART1->CR1 |= USART_CR1_UE | USART_CR1_RE | USART_CR1_TE; // USART1 freigeben (RX, TX und UE) and after receiving of the answers: DMA_Cmd(DMAChannel_USART1_RX, DISAB...

h2 · 2014-05-12

Posted on May 12, 2014 at 11:49Hello Jan, yes, your error appeares with timer in DMA mode but is comparibel. A. Paiva but has exactly the same problem then I had. Like you said, it seems, that the DMA controller saves the event in an internal latch ...

h2 · 2014-05-08

Posted on May 08, 2014 at 17:38Hi to all, now I made a rework to that problem because it's not possible for me to find the cause. I consequently switch off the USART1 and the belonging DMA after every sending data and receiving answers. Then the pro...

h2 · 2014-05-07

Posted on May 07, 2014 at 11:10Hi clive1, of course you are right, The debugger has no magic power :-). Sometimes I forget that the debugger do the same as the CPU would do. In the meantime I have written a complete initialization for the DMA regist...

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DMA reads from USART1 without RXNE set

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Re: DMA reads from USART1 without RXNE set