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Linker Problem: undefined reference to `__errno'

Posted on October 22, 2015 at 18:20Hi,I'm trying to get to grips with System Workbench for STM32 & STM32F429i-Disco board.I'm trying to build the STemWin_SampleDemo project for STM32F429I-Discovery, supplied in STM32Cube_FW_F4_V1.8.0but it comes up ...

daemynnur by Associate II
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  • 13 replies
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Why is the SysTick timer off by a few clock cycles?

Posted on August 11, 2017 at 08:36Hello all,Sometime ago I was looking into configuring the SysTick timer for an stm32f407 mcu. As the CMSIS lib provides a function for this, this is kind of straight forward. To verify the configuration I measured t...

Resolved! STM32F723 ST-Link FLASH memory-size and erase error

Posted on August 15, 2017 at 23:281. ST-Link reports the wrong size for the Flash memory. ST-LINK-Utility reports 'Unknown' and the ST-Link CLI reports 4095 kBytes.2. ST-Link CLI can't erase memory sector 1 at 0x08004000. When using the commandline-...

How to get more info when watchdog reset occurs

Posted on August 22, 2017 at 09:43We are using quite a few stm32 MCUs from 401 to 439, and our program becomes more and more complicated. In order to avoid possible deadloop, we have used watchdog to rescue the system, basically it is working well n...

jeff23 by Associate II
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spl RCC config for external oscillator

Posted on July 30, 2017 at 10:57hi i have connected &sharposcillator to &sharpOSC_IN (PD0) i used this function for init &sharpRCC at &sharpSTM32F103c8t6but is not work with &sharppll and &sharpexternal oscillator please help to me ...void RCC_Confi...

STM32F303K8 DAC problem

Posted on July 14, 2017 at 13:38The original post was too long to process during our migration. Please click on the attachment to read the original post.

Rad Rad by Associate II
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STM32L476VG User_Usb

Posted on August 22, 2017 at 13:14Hi sir I'm working on  STM32L476VG board for this i want to do communication with User USB as Device and PC as host could you please help me for driver  to access user USB or tell me what i have to do to access user...

STLINK Utility V4.0.0 problem

Posted on August 09, 2017 at 04:04Hi, I am currently playing with micropython on NUCLEO-L476RG and get it flashed and working using STLINK Utility V3.9.0But then when I update to STLINK Utility V4.0.0, using the same exact .HEX files, It stop workin...

Why it always takes 12 clock cycle while using the STLINK to trace single instruction's execution time?(about dual-issue, St-link and Cortex-M7 pipeline)

Posted on August 22, 2017 at 12:25The device is STM32F746NG-DISCO, and I measure the execution time of single instruction by this ways:int a=0; int b=255;while(b--) { a++; }make breakpoint and watch the value of States. And by this, I found that for...

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