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New possibilities for the ultra-low power segment!

STM32U0 is the first Cortex-M0+ with a static consumption of only 160 nA in standby mode with RTC (Real-Time Clock) and 16 nA in shutdown. It also achieves 118 points in CoreMark and targets SESIP level 3 and PSA level 1 focusing on firmware code pro...

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STM32F205 __disable_irq() undefined symbol Keil ARM

Posted on November 20, 2013 at 08:43Hi. I want to disable all interrupts in my STM32F205  and I use macro __disable_irq() in core_cmFunc.h. I verified that this instructions works fine, but in ARM Keil IDE, if I select ''Go to definition of __disab...

giovanni by Associate
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Bug in USB library v4.0.0 usb_prop.c

Posted on November 21, 2013 at 01:28 I've come across an issue in usb_prop.c in the STM32 USB library examples. The _GetStringDescriptor function checks for the index of the Descriptor string, but allows an index of up to 4. There are actually o...

STM32F429I-DISCO export restrictions?

Posted on October 09, 2013 at 21:26HiI am based in South Africa and got a STM32F4 Discovery a while back, and now I tried to order a STM32F429I-DISCO, but Farnell gets back to me with:Farnell will not accept our order for 2355377 / STM32F429I.This i...

xacc by Associate II
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  • 10 replies
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I2C - stm32f3

Posted on November 20, 2013 at 21:54Hello guys,Im doing a project with I2C communication and im rather new to this kind of communication. I am trying to hook up a cam on the stm32f3 and get a picture. Although the programming of the I2C i find not d...

STM32 firmware stack for ST7540

Posted on May 22, 2013 at 21:53Hello,I'm starting to develop firmware to interface the ST7540 powerline communication modem. I have read http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00063638.pdf but I couldn...

daan by Associate II
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  • 4 replies
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Initialising RTC

Posted on November 20, 2013 at 17:40Hey guys, I'm attempting to setup RTC without using any of the STM libraries. I've managed to disable the write access to the RTC registers by entering the keys into the RTC_WPR register. I've set the Init bit in ...

Quadrature encoders roll over management

Posted on November 19, 2013 at 02:25Hi,I am currently developping a firmware programmed into a STM32F407VG microcontroller.The firmware has the following tasks:- Reading motor positions (5 axes: 3 with quadratures/indexes and 2 with steps/directions...

demond by Associate
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  • 8 replies
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STM32F407 as i2c slave

Posted on February 25, 2013 at 09:23Hi, does someone have experience with unable to clear STOPF bit, what causes continually jumps into i2c IRQ?I am trying to do it this way: I2C_ClearFlag(I2C1,I2C_FLAG_STOPF);,but it does not work.The reference man...

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