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STM32F4 Discovery UART DMA TX Problem

Posted on June 06, 2014 at 00:52Hey ST Forum,I'm using the ST32F4-Discovery Board, and ran into some problems while testing UART4_TX in DMA Mode. When I look at oscilloscope, the TX line is pulled down, then gradually goes back to 3V. I think my Per...

STM32F429 / 439 max concurrent DMA transfers

Posted on June 05, 2014 at 19:59The http://www.st.com/web/en/resource/technical/document/errata_sheet/DM00037591.pdf describes a limitation with the DMA2. ''2.1.10 DMA2 data corruption when managing AHB and APB peripherals in a concurrent way'' Does...

sdim by Associate III
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Creating a square wave

Posted on July 11, 2011 at 15:01I'm an absolutly beginner in microcontrollers. I want to create a simple square wave signal on STM32F103VB with tim3, ch2, but nothing happens. Can anybody tell me what I'm doing wrong? Thanks Tom #define DEF_SPEED ...

Setting Timer to 1ms

Posted on June 03, 2014 at 17:04Hi All, I am using STM32 F0 Discovery board with Raisonance IDE, I am with LED blink using TIM. I want to blink for every 1s but I dont know how to set the timer, Please tell me how the calculation is done for 1s and ...

santosh by Associate II
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STM32CubeF4: Usb documentation

Posted on February 28, 2014 at 16:28Is there any documentation or examples for the new USB stack in the STM32CubeF4 code library ? I need to implement an USB Virtual Com port. I have done this for the older usb stack in the STM32F4-Discovery_FW_V1.1...

How to use timers for generating signals?

Posted on June 05, 2014 at 14:46Hello, I am very new in STM32F103 CPU and I need to make very simple program. I need to generate PWM signal with definned on-time and off-time.The on-time must be in range from 1us to 1000us, step is 1 us. The same wi...

dvoraj45 by Associate
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while(!DMA_GetFlagStatus(...)); never pass ....

Posted on May 30, 2014 at 11:31 Hi, I have a big problem,I try to use a WS2812 (LED card), with a stm32f4 But it doesn t work at all .... I try in debug and the program is blocked here:while(!DMA_GetFlagStatus(DMA1_Stream5, DMA_FLAG_TCIF5)); plea...

hibou by Associate II
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