STM32 MCUs Embedded software

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Crystal accuracy for USB

Posted on July 22, 2016 at 22:58What ppm accuracy is needed for STM32F103RB as full-speed (12Mbits/s) device? Is RC HSI (a few percent error) not accurate enough for STM32F103RB as USB device? For STM32F401RE, do host or OTG modes require higher acc...

john1389 by Associate II
  • 300 Views
  • 1 replies
  • 0 kudos

Resolved! HAL STM32L0: DeInit of WWDG

Posted on July 22, 2016 at 10:28Hi, since the WWDG of the STM32L0 series can be deactivated only by a hardware reset I don't understand the purpose of the function HAL_WWDG_DeInit in the HAL (v1.7.0). The function and its description suggest, that I...

dost by Associate II
  • 525 Views
  • 1 replies
  • 0 kudos

Weird USB enumeration issue

Posted on July 18, 2016 at 19:39Hi, Got a weird enumeration issue on a USB device in my USB host implementation. Using STM32F746Discovery with CMSIS/HAL, re-utilising one of the provided USBHost library examples. I have a specific external USB devic...

sv1eia by Associate II
  • 265 Views
  • 1 replies
  • 0 kudos

USB CDC on microC/OS II?

Posted on June 29, 2016 at 03:30I've generated a test app using STM32Cube for a STM32F407 Discovery board and have been able to send and receive.  I am now trying to port the code to run under microC/OS II.  I have modified the ISR to include the uC...

[STM32F042] I2C slave receive only address

Posted on October 19, 2015 at 13:48Hi,for last three days I try to communicate with my STM32F042 (working in slave mode) but it doesn't work correctly. There is no data in RXDR and busy flag is set after correct receive of address (ADDCODE flag is s...