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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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stm32f207 code protection

Posted on May 05, 2013 at 00:45Hi again.I have made great strides in our system this past week (our first use of the stm32) and we have had great interest in this latest (stm32 based) product from potential customers and therefore we would like to s...

adrian by Associate III
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Timer overflow when in PWM mode?

Posted on May 20, 2013 at 09:18Hello,I'm running my code on STM32F103 chip, I've set up a PWM output from timer1 with period of 200 ms, pulse width 5 ms, it's working and can be seen with a scope on GPIOA_8. The thing is, that I want to do something...

Syncing USART/DMA RX

Posted on May 20, 2013 at 22:38I am using a STM32F407 and have set it up for using USART with DMA. I have some problems with the RX part. What is the best way to sync the enabling of the RX DMA with the remote transmitter? If I enable it in the midd...

NVIC and invalid SCB->ICSR register with DMA2

Posted on March 14, 2013 at 20:55Environment is an STM32F205VF on a custom board, but the problem has also appeared on a STM3240G eval board with an STM32F407I.  Compiler is GCC 4.6.2 at optimize level O0 for debugging. My application has extensive ...

f4-discovery, fpu not working in timer interrupt?

Posted on May 21, 2013 at 16:55Hi, I'm testing the f4 and the fpu. I have a small fpu test like this:volatile float a=0;volatile float b=.1;int c;for(;;)    {      GPIOD->ODR^=0x8000;      for (c=0;c<100;c++)        a=a+b;    }So by looking at PD15 ...

HardFault_Handler exception...

Posted on May 16, 2013 at 13:53Hello,I'm using the STM32F4 on the discovery evaluation board.I wrote a simple function that calculates the mean of a vector. When the code is starting to make the summation it goes to HardFault_Handler...Here is the m...

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yoav by Associate II
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STM32F2xx OTP issue

Posted on April 02, 2013 at 16:47I need to put some data permanent in the OTP. But I phase a few problem durring debbug. 1. When try to program it on power up like in the FLASH I get the error can't program address 0x1FFF7800 as it is not a part of ...

Barbie by Associate II
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Timer Set up conf: intriguing issue.

Posted on May 20, 2013 at 16:04Hi Folks I have this simple example program that I am modifying and by moving one statement into a while statement it breaks it. I'm working on the STM32F4 Discovery boardHere is the code:- /* =========================...

bl by Associate II
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Isochronous endpoint: device busy

Posted on May 20, 2013 at 19:19Hello all,I'm trying to get a demo to work with an isochronous endpoint (audio speaker). My starting point are the Discovery-F4 demos, with USB-FS library upgraded to V3.3.0. I cannot seem to get the device to work. It...

stm32 by Associate
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