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Running STM32F4 from an Oscilator

Posted on May 29, 2015 at 07:17System Clock Configuration tool is doing a great job to generate init code for STM32F405RG however it does not support external clock oscillator which is fed into OSC_IN (pin 5) only. (meaning Osc not Crystal).I suspec...

isaac by • Associate II
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  • 6 replies
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How to manage stack access by Interrupts (STM32L100) ?

Posted on May 20, 2015 at 22:51Dear community,I want to send some data via UART directly to DMA without interruption. To solve this problem I use a custom FIFO stack from which the DMA feeds itself using its DMA interrupt-routine.The stack is filled...

jogerh by • Associate II
  • 802 Views
  • 6 replies
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Modifying Custom HID Application

Posted on October 05, 2013 at 22:03Hi;I am working on the Custom HID application which is in the St library and I use STM3210E-EVAL.  But this protocol transfer only 2 bytes (1 Byte Id + 1 Byte Data) so I modified the code and I transferred the 64 b...

prt by • Associate
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  • 2 replies
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Trouble with USART_ReceiveData() and STM32F103 with Tera Term

Posted on May 29, 2015 at 17:20Hi,I would like assistance in determining why I cannot properly use the USART_ReceiveData() function with my SMT32F103RE. I have been using Tera Term with a SparkFun FT232R usb to serial breakout board. Printing to Ter...

leah by • Associate
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  • 1 replies
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STM32F401xC: Generating a square wave

Posted on May 29, 2015 at 16:53Hello guys,I would like to ask you a little question:how to generate a square wave (0-3V) by STM32F401xC microcontroller?I use IAR Embedded Workbench, if you need this information.Thanks!

dan_v by • Associate II
  • 518 Views
  • 1 replies
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interrupt routine service latency in stm32f407

Posted on May 29, 2015 at 14:49HelloWhat is the delay between interrupt occurance(e.g. external interrupt on a pin) and interrupt service routine entry?by some initial measurements, it's about 30 cpu clocks.Is it interrupt type(external pin, specifi...

STM32Cube USB VCP on F401

Posted on May 29, 2015 at 12:36Hi,Having had a working USB VCP using the old non-cube drivers, I've spent the last week trying to get a reliable VCP with the new ones - and failing. In fact at one point just uncommenting some irrelevant and unused c...

gw by • Associate II
  • 556 Views
  • 0 replies
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STM32L053/51: Can't set DBG_STOP at the start of main

Posted on May 28, 2015 at 01:41Hi, I want the debug ability during stop mode. According to the reference menu, DBG_STOP in register DBG_CR bit should be set to do this. But after I set it, it is still 0. I have tried several ways: Use a macro ''ex...

14545714 by • Associate II
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  • 2 replies
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