Hi all,
I am working with STM32F4xx. I want to re-initialize my USB device during the application is running. The problem is that PC doesn't recognize that USB device has changed its configuration. But when I unplug the USB and then I plug-in again everything is fine. Can I do this somehow by firmware?
I tried to set the MCU pins (which are dedicated to USB OTG) to high impedance. Then PC should recognize single-ended-zero state but it didn't work. Maybe when once the MCU pins are defined for USB OTG use I cannot modify them by GPIO commands? Thanks for ideas.
Jan
SDIS bit (Soft disconnect) on OTG_FS_DCTL (or OTG_HS_DCTL) register does the job. If you are working on Keil RL-USB library, USBD_Connect( __FALSE ) is available.
Tsuneo
Thank you Tsuneo! Works perfect :) Not everything is in USB libs. It is better to read datasheets. I should have taken a look at that :)