Hi everybody! Has anyone experimented issues using the FoxBoard and a USB-to-Serial converter?
I'm using an FTDI to build a UART port for connecting a GPRS modem.
Generally the modem work fine but sometimes the ppp daemon shutdown and
looking at dmesg I could read the sentences reported on attachment.
The USB port is being disabled by the HUB, possibly due to EMI, and thereafter
immediately re-enabled. My suspect is that the FoxBoard someway produce EMI
that affect USB communications and
Has anyone experimented similar instabilities?
Has anyone monitored FoxBoard electromagnetic emissions?
... and even more important: is the FoxBoard CE compliant?!?
Thanks
Patrick
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DERKLING
LRU 338214 (http://counter.li.org)
"I invented it, Bill made it famous." - David Bradley
(wrote the code for Ctrl-Alt-Delete on the IBM PC)
<---------------------------------------------------------------------------------------------------------->
Patrick Bellasi <derkling at users dot sourceforge dot net>
PhD Student on Computer Science at Politecnico di Milano
Contacts:
- ICQ 344672588
- MSN derkling at yahoo dot it
- Skype derkling
Personal Sites:
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Privacy:
- GnuPG 0x72ABC1EE (keyserver.linux.it)
pub 1024D/72ABC1EE 2003-12-04 Patrick Bellasi
Key fingerprint: 3958 7B5F 36EC D1F8 C752 9589 C3B7 FD49 72AB C1EE
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--
<---------------------------------------------------------------------------------------------------------->
DERKLING
LRU 338214 (http://counter.li.org)
#include <best/regards.h>
<---------------------------------------------------------------------------------------------------------->
Patrick Bellasi <derkling at users dot sourceforge dot net>
PhD Student on Computer Science at Politecnico di Milano
Contacts:
- Mobile +39 347 3153808
- Phone +39 02 236566942
- ICQ 344672588
- MSN derkling at yahoo dot it
- Skype derkling
Personal Sites:
- Bookmarks http://del.icio.us/derkling
- Bibliography http://www.bibsonomy.org/user/derkling
- Music taste http://www.last.fm/user/derkling/
Privacy:
- GnuPG 0x72ABC1EE (keyserver.linux.it)
pub 1024D/72ABC1EE 2003-12-04 Patrick Bellasi
Key fingerprint: 3958 7B5F 36EC D1F8 C752 9589 C3B7 FD49 72AB C1EE
<---------------------------------------------------------------------------------------------------------->
Feb 13 13:15:08 cbox-devboard kernel: crisv10_irq warn: 3rd error for epid:3 (in bulk) URB:0xc0490a00[25917] Feb 13 13:15:08 cbox-devboard kernel: crisv10_irq dbg: ctr_status_irq, controller status: host_mode Feb 13 13:15:08 cbox-devboard kernel: hub 1-0:1.0: port 1 disabled by hub (EMI?), re-enabling... Feb 13 13:15:08 cbox-devboard kernel: usb 1-1: USB disconnect, address 2 Feb 13 13:15:08 cbox-devboard kernel: usb 1-1.5: USB disconnect, address 3 Feb 13 13:15:08 cbox-devboard kernel: ftdi_sio 1-1.5:1.0: device disconnected Feb 13 13:15:08 cbox-devboard kernel: crisv10_irq dbg: ctr_status_irq, controller status: host_mode started Feb 13 13:15:08 cbox-devboard kernel: crisv10_irq dbg: ctr_status_irq, controller status: host_mode started running Feb 13 13:15:08 cbox-devboard pppd[132]: Hangup (SIGHUP) Feb 13 13:15:08 cbox-devboard pppd[132]: Modem hangup Feb 13 13:15:08 cbox-devboard pppd[132]: Connection terminated. Feb 13 13:15:08 cbox-devboard pppd[132]: Connect time 8.2 minutes. Feb 13 13:15:08 cbox-devboard pppd[132]: Sent 47724 bytes, received 1546168 bytes. Feb 13 13:15:08 cbox-devboard kernel: usb 1-1: new full speed USB device using hc-crisv10 and address 4 Feb 13 13:15:08 cbox-devboard kernel: hub 1-1:1.0: USB hub found Feb 13 13:15:08 cbox-devboard kernel: hub 1-1:1.0: 7 ports detected Feb 13 13:15:08 cbox-devboard pppd[132]: Connect time 8.2 minutes. Feb 13 13:15:08 cbox-devboard pppd[132]: Sent 47724 bytes, received 1546168 bytes. Feb 13 13:15:08 cbox-devboard pppd[132]: Exit. Feb 13 13:15:08 cbox-devboard kernel: drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb Feb 13 13:15:08 cbox-devboard kernel: drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb: DTR LOW, RTS LOW Feb 13 13:15:08 cbox-devboard kernel: ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0 Feb 13 13:15:08 cbox-devboard kernel: usb 1-1.5: new full speed USB device using hc-crisv10 and address 5 Feb 13 13:15:09 cbox-devboard kernel: ftdi_sio 1-1.5:1.0: FTDI USB Serial Device converter detected Feb 13 13:15:09 cbox-devboard kernel: drivers/usb/serial/ftdi_sio.c: Detected FT232BM Feb 13 13:15:09 cbox-devboard kernel: usb 1-1.5: FTDI USB Serial Device converter now attached to ttyUSB0
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