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Forum Posts

STM32F411 Output pin connection while no VCC is applied

Posted on April 01, 2018 at 13:22Hello all,In my application, I'm controlling a secondary device using enable pin which has an internal pull-up resistor.The output pin is set to be ''0'' or open drain type output, and the STM32F411 VCC1 can be power...

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Nir Alon by Associate II
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  • 17 replies
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Help to interface AT24C256 EEPROM with STM32F051r8

Posted on April 07, 2018 at 17:42I am trying to to write/read to at24c256.Iam new to I2C.I read about all theory stuffs.But i tried writing code from the i2c eeprom eg, but am not to able to skip the txis flag while loop.Please help.I commented the ...

Use of __libc_init_array call

Posted on April 07, 2018 at 18:36Hello,Into the startup assembly file there is a call to the __libc_init_array procedure, and i would like to know : What does it do ?If it is really essential ?What is the default implementation of the _init() proce...

oldone by Associate II
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  • 2 replies
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Resolved! Timer update DMA generation problem

Posted on April 07, 2018 at 16:30Hello! I'm working with stm32f042 MCU. My task is to read GPIO 8-bit data (7-0 bits) periodically, the faster, the better. I use timer 3 to generate DMA request and DMA channel 4. The idea is the following one: timer...

Is the C standard library embedded with the program ?

Posted on April 07, 2018 at 18:27When i compile my project with gcc, does it : Include all the C standard library with my source code into the flash memory ?Or does it include only what i've used ?Or does it not include it at all ?Thanks.#c-compile...

oldone by Associate II
  • 430 Views
  • 1 replies
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Problem about STM32F301 IAP.

Posted on April 04, 2018 at 07:59Hi?I encountered a strange problem in my iap bootloader project.There are two project for my application, the first is for ota. the second is for the universal task.when the board is powered. The first project is act...

kang hu by Associate
  • 482 Views
  • 1 replies
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ADC1 channel 0 is always on PA0. Why?

Posted on April 07, 2018 at 14:31It is possible to change every other pin but not ADC1 channel 0. I wonder why. What is special in PA0 or in that ADC channel.I am currently looking at STM32F746 but others are no different(, I think).

LMI2 by Lead
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  • 1 replies
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Dual CDC on STM32

Posted on October 18, 2016 at 14:54Hello there, I am working with HAL library. I have used CubeMx to generate a startup code for USB id device mode with CDC driver. I was wondering either it is possible to easily modify the library in order to have ...