STM32 MCUs Products

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Forum Posts

ADC using DMA

Posted on April 10, 2015 at 12:25I'm using a stm32f429 running at 144MHz and I wanted to implement a periodic two-channel adc conversion. I need to make the conversions on a 1us period and I'm considering in using a dma adc conversion. I know how to...

damasosb by Associate II
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  • 3 replies
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needing low speed SPI communication

Posted on April 12, 2015 at 16:50Hello everyone! I am using STM32F103RET for my project. I need to communicate by SPI with a low speed digital device with the speed of at most 1KHz clock. At the same time, I need to have my own cpu clock as high as ...

abbas by Associate II
  • 596 Views
  • 4 replies
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Power down reset feature to back up the external SRAM data

Posted on April 14, 2015 at 15:33Hi,I want to use external SRAM with the controller STM32F429. i want to make use of internal supervisor circuit, which is used to power the internal RTC and internal 4Kb SRAM, to backup the data in external SRAM. for...

vini by Associate II
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  • 2 replies
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Volatile uint8_t variable in interrupts

Posted on April 14, 2015 at 21:51 Hello, I have function fifo_read(RxFifo, &rx, 1) which reads byte from FIFO buffer. I want to use this function in two different interrupt handlers. I have declared rx variable as fo...

hospodar by Associate III
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  • 2 replies
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Debugger: Could not stop Cortex-M device

Posted on April 14, 2015 at 23:01I've made several custom STM32F4 boards.Never any problems, until now, when my JLINK detects my board ONLY, if I press reset button before I press detect device in Keil uVision.When I press download button I got erro...

tm3341 by Associate II
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  • 0 replies
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I Can´t disable RTC512Hz signal

Posted on April 14, 2015 at 17:03How can I disable RTC 512Hz signal and return PC13 as I/O ??I programed the PC13 as ''GPIO_AF_RTC_50Hz''  to calibrate the 512Hz signal of internal RTC, but now I cant disable it to use PC13 as I/O, The STM32F205 doe...

acer by Associate II
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  • 2 replies
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STM32L151 nRST pin... doesn't reset!

Posted on April 13, 2015 at 09:08We are experiencing a very annoying issue... we have a portable application, STM32L151, DVdd=3.0 regulated via an LDO, lithium battery. Randomly, the MCU freeze and the nRST does... nothing! We need a full power cycl...