stm32 USB OTG Host doen't work with some usb-devices

maxim · ‎2013-09-06

Posted on September 06, 2013 at 09:20

Hello. I

am

trying to use usb host in stm32f105. Done everything according to reference manual, usb libs, application notes, etc. The host works,but not always. To be more exact: not with all usb-devices. Keyboards, mouses, 3G modem work fine.

But most flash memory sticks don't work. I tried about 10 different sticks and only 2 of them work. USB hubs don't work either. With

such

devices I get TXERR interrupt when sending the very first SETUP packet (to get dev descr).

I sniffed the bus and discovered that those sticks don't even try to reply anything. I see the packets issued by stm32 and after second EOP the bus remains idle. Any ideas why this happens? And how to fix? Any help will behighly

appreciated.

#stm32 #stm32-usb-host #connectivity-usb

frankmeyer9 · ‎2013-09-06

Posted on September 06, 2013 at 10:39

Not that I have much detailed experience with USB, but it could simply be a power problem.

Did you try with a powered hub ?

For example, my beagleboard also does weird things when attaching certain 'bigger' mass-storage devices.

maxim · ‎2013-09-06

Posted on September 06, 2013 at 13:47

No. The power is sufficient for sure. The voltage doesn't drop below 5V in any contidions.

ajoyce · ‎2013-10-11

Posted on October 11, 2013 at 20:28

I had the problem that on occasion an attached device wouldn't enumerate. I decided that the device was slow, taking too long to respond to the USB bus reset, and was therefore missing the Get Descriptor packet. So I set a timeout after issuing the Get Descriptor and if there was no response in a certain amount of time, like a 1/4 second, the MCU resends the Get Descriptor command. If there's no response after 4 reties, the MCU issues a new bus reset and started the process all over. I don't like how hit and miss the process can be, but it keeps my code from waiting forever when the attached device doesn't respond.

bluexav · ‎2013-11-01

Posted on November 01, 2013 at 15:21

It might be a USB 1.0 / USB 2.0 compatibility problem.

I couldn't make my USB 1 mice work on the F4 discovery board configured as a USB host but the USB 2.0 mice worked...

I had the same problems with usb sticks. (there is also a formatting issue to respect)

Tesla DeLorean · ‎2013-11-01

Posted on November 01, 2013 at 15:38

The other issue that comes up periodically is with cheaper devices not using crystal oscillators, and being out-of-spec with respect to the USB spec.

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bluexav · ‎2013-11-01

Posted on November 01, 2013 at 19:03

Did you try this modification :

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/USB%20state%20machine%20hangs%20with%20some%20usb%20keys

rafik · ‎2016-10-19

Posted on October 19, 2016 at 19:51

Good evening,

I work on a small project and I want to use a STM32F4 board with a 3g modem, so the board will be in USB host mode and I can not seem to do the operation. I would like you to tell me how you did and thank you