STM32 MCUs Products

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Why is my Cortex-M4 taking too much cycles?

Posted on September 10, 2012 at 18:49Dear STM-experts,i wanted to use the FPU of my STM32F4 (Cortex-M4). To see if it's working properly i compared with this page:http://www.micromouseonline.com/2011/10/26/stm32f4-the-first-taste-of-speed/?doing_wp_...

ADC channels and GPIO pins: STM32F407xx

Posted on September 06, 2012 at 23:45Dear colleagues,          I'm presently looking at the ADC routines in the Standard Peripheral Libraries, and they're pretty well written and documented; what I'm failing to understand so far is how the GPIO pins...

New to STM32F405xx, general architecture feasability

Posted on September 10, 2012 at 11:52Hi all,Coming from AVR 8 bits architecture, I plan to work (hard) to develop an IMU under STM32F405xx now.I'd like to know if the following architecture is correct. I believe it's possible from my first readings ...

neoirto by Associate II
  • 642 Views
  • 7 replies
  • 0 kudos

STM32F10x peripheral driver bug

Posted on September 09, 2012 at 16:31 I found the following bug. I have a 16MHz crystal on my board design. I use the STM32F103RB uC with Atollic True Studio Lite 3.2. The stm32f10x.h advises me to set theHSE_VALUE according to my crys...

rigomate by Associate II
  • 724 Views
  • 5 replies
  • 0 kudos

STM32F103RE: ISP bootloader doesn't work correctly

Posted on September 05, 2012 at 15:58Hello, I just started a new project with the F103RE controller. Opposed to the F103RB I have used before, the ISP bootloader in this chip simply does not work. Though it is obviously running correctly (verified b...

tilmann by Associate III
  • 1557 Views
  • 19 replies
  • 0 kudos

Timer Duration Count With Interrupt

Posted on September 10, 2012 at 12:26A fairly basic thing to do which I am struggling to find any precise examples for.I want to be able to setup a Comms timeout - specifically on an SPI connection whereby if  I don't get a response to a command I s...

dclark9 by Associate II
  • 1032 Views
  • 5 replies
  • 0 kudos

STM32F4 USB Host HS for MSC

Posted on May 26, 2012 at 17:08hi all i try to work with usb host hs for msc. but no answer ! my program in this instruction looped :     do     {       status = USBH_MSC_Read10(&USB_OTG_Core, buff, sector, 512*count);       USBH_MSC_HandleBOTXfer(&...

jt1355 by Associate
  • 605 Views
  • 4 replies
  • 0 kudos

SYSTICK is really funky - I think

Posted on September 10, 2012 at 09:25In my application I set up SysTick with: SysTick_Config(SystemCoreClock / 1000);to generate a 1ms interrupt.I got some weird timing anomalies and eventually used a timer interrupt to generate 1ms interrupts using...

carl2399 by Associate II
  • 335 Views
  • 1 replies
  • 0 kudos

Internal temperature sensor

Posted on July 02, 2011 at 20:18Hello.I'm trying to use the internal temperature sensor, but I can't understand the reference manual formula:  Temp = ((V25 - Vsense) / Avg_slope) + 25).In the product datasheet, it says V25 is 1.41 V and Avg_slope is...