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STM32F407-Discovery CAN bus problem

Posted on July 20, 2015 at 10:02Hi Guys,I'm struggling to activate the can bus in the CAN2 module in the discovery eval board.Using CubeMx, Generated all the initialization code.Set baud-rate to 50KHz, and to loop-back mode.The output waveform looks...

isak by • Associate
  • 1044 Views
  • 2 replies
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STM32F4 Disco Connect Under Reset

Posted on July 20, 2015 at 21:54Hi there , I had my STM32F407VG discovery board for a while now, till a few minutes earlier, I was trying to interface a button to PA13 ( I chose PA13 randomaly) to create a simple interaface for my project , but once...

monta by • Associate II
  • 589 Views
  • 2 replies
  • 0 kudos

STM32F746 lacks bit-banding?

Posted on July 20, 2015 at 21:53Does the new STM32F7 series omit bit-banding support?There is no mention of bit-banding in the STM32F7 reference manual.  Attempting to use bit-banding results in a fault condition.I'm surprised by this omission.  Or ...

dale by • Associate III
  • 999 Views
  • 4 replies
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STM32L053 discovery standby

Posted on July 20, 2015 at 21:42I write some code that seems to successfully put the chip into standby mode:    PWR->CR |= PWR_CR_PDDS;    SCB->SCR |= SCB_SCR_SLEEPDEEP;    while (1) { __asm(''WFI'')__; }That seems to stop everything as expected. Wh...

lee23 by • Associate II
  • 507 Views
  • 2 replies
  • 0 kudos

STM32F072 - Hard Fault when reading from System Memory

Posted on July 20, 2015 at 19:47Hi.I'm looking for some help with the STM32F072.Q: What are you trying to do?A: I'm trying to read the factory measured voltage of the bandgap voltage reference in order to calculate the VDD as exactly as possible. As...

bjerman by • Associate II
  • 1223 Views
  • 6 replies
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VDDA starts after VDD

Posted on July 20, 2015 at 11:02In the http://www.st.com/web/en/resource/technical/document/application_note/DM00115714.pdf is written: ...During the startup phase VDDA must arrive first and be greater than or equal to VDD. ... Why that what if it i...

stst9184 by • Associate II
  • 3294 Views
  • 11 replies
  • 1 kudos

STM32f4 5V output pin

Posted on July 20, 2015 at 12:42Hi, I'm connecting stm32f4-disco through USB to the computer and I'm measuring the 5v output pin from the board with a scope and I get 3,9 V. Did I burn it or something? Thank you

fiulala by • Associate II
  • 1917 Views
  • 5 replies
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STM32F411RE - RTC and VBAT

Posted on July 20, 2015 at 15:47 Hello I have been trying to get the RTC to work with VBAT. I have connected 3V coin cell battery to the VBAT pin (RTC initialized beforehand). I test if RTC is working in the following way: if((RTC...

tbnkr by • Associate II
  • 794 Views
  • 3 replies
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STM32f4 Discovery EXTI Clear pending bit

Posted on July 20, 2015 at 00:05Hello all,I tried searching for a bit but couldn't find anything pertaining to my question.I'm trying to set up an external interrupt but I don't understand why exactly we clear the pending bit in EXTI->PR and not in ...

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