STM32 MCUs Products

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Forum Posts

STM32F207 Uart polarity

Posted on January 02, 2013 at 15:55Hi, is there any possibility to change the polarity TX and RX of USART5? I.e. normally idle state is high, startbit is low. We need (due to bad specs of a foreign device) the opposite polarity (software only soluti...

zabel by Associate III
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  • 5 replies
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How to make your board recognised in dfu mode

Posted on November 05, 2012 at 15:06Hello, I read stm documentation on how to enter a microcontroller into dfu mode Iam using stm32f105, and below are the steps that i did 1- Boot0=1, Boot1= 0 2-PD6 = PA10 = PB5 = 0 3- make reset 4- connect the boar...

hisham23 by Associate III
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  • 2 replies
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PLL implementation

Posted on January 03, 2013 at 11:46Hi <3 Happy New Year 2013 <3 I want to implement PLL (Phase-locked loop) in STM32F4 Descovery Card The Goal is to control output system frequency to be equal to the input frequency., to eliminate the noise eff...

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bmwael1 by Associate II
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  • 1 replies
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STM32F4 interrupt issue

Posted on January 02, 2013 at 15:29Hello experts, I'm using stm32f4 discovery board. I have connected an interrupt line from a RTC chip to PA1 of my board. The RTC chip gives interrupt signals each 1 second. The way I enable interrupts is as follows...

Accessing SD card via SPI

Posted on January 03, 2013 at 05:55Hi, I have an STM32F4 discovery board and I want to access SD card via SPI. The reason why I want to access Sd card via SPI is that the breakout module that I have has an SPI interface. I have looked on the interne...

osama by Associate II
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  • 1 replies
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stm32f407, jtag does not respond

Posted on January 02, 2013 at 23:09Hi all,I have a strange behaviour with 4 stm32f407 boards related to the jtag. The jtag of the stm32f4 is connected to a FTDI4232 chip. I have connected only the JTCK (with a 10k pd), the JTDI (with a 10k pu), the ...

romaine by Associate II
  • 635 Views
  • 2 replies
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STM32 F103xx using PB3

Posted on September 20, 2012 at 11:44Hello, We want to use PB3 of the microC. As found in some forums we have to disable JTAG. We do this using following line of code: GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); Then we want to use P...

gino by Associate II
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  • 7 replies
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Hard Fault Handler Interrupt Stm32F1?

Posted on January 02, 2013 at 21:55Any help with finding this bug is appreciated. I am truly at a loss.I am using the virtual com port for USB(V.3.1). I had it working great, communication was like a wife and husband once wished. I was sending host ...

STM32F0 ADC DMA, where are results of measurements

Posted on December 28, 2012 at 09:21Board STM32F0 Discovery, measurment on 4 analog inputs: PC0 - ADC_IN10 PC1 - ADC_IN11 PC2 - ADC_IN12 PC3 - ADC_IN13 and Vbat, Vref, Vtemp. Configuration of ADC1 and DMA is shown in attachment. for ''ADC_InitStruct...