Hello all
I have taken the program on the link below
as suggested by Jan on this forum …for using usb as uart on BeagleBoard xm
http://www.lvr.com/code/usb_serial_port.c
I have connected BeagleBoard uart to windows hyperterminal and its connected successfully .
Now i am able to write on uart from Beagleboard side …
but as i read on Beagleboard …i.e write something on Hyperterminal …at once
These ERROR MESSAGES come on Beagleboard !!
[ 236.729919] musb g_serial gadget disconnected.
[ 238.990112] g_serial gadget: high speed config #2: CDC ACM config
[ 274.613616] ------------[ cut here ]------------
[ 274.618286] WARNING: at kernel/mutex.c:207 __mutex_lock_slowpath+0x6c/0x278()
[ 274.625488] Modules linked in: g_serial rfcomm ipv6 hidp l2cap bluetooth rfkill
[ 274.632965] [] (unwind_backtrace+0x0/0xdc) from [] (warn_slowpath_common+0x4c/0x80)
[ 274.642425] [] (warn_slowpath_common+0x4c/0x80) from [] (__mutex_lock_slowpath+0x6c/0x278)
[ 274.652496] [] (__mutex_lock_slowpath+0x6c/0x278) from [] (mutex_lock+0xc/0x1c)
[ 274.661621] [] (mutex_lock+0xc/0x1c) from [] (echo_set_canon_col+0x18/0x40)
[ 274.670379] [] (echo_set_canon_col+0x18/0x40) from [] (n_tty_receive_buf+0xc54/0xf38)
[ 274.680023] [] (n_tty_receive_buf+0xc54/0xf38) from [] (flush_to_ldisc+0x114/0x1e0)
[ 274.689514] [] (flush_to_ldisc+0x114/0x1e0) from [] (gs_rx_push+0x140/0x220 [g_serial])
[ 274.699340] [] (gs_rx_push+0x140/0x220 [g_serial]) from [] (tasklet_action+0x74/0xbc)
[ 274.708984] [] (tasklet_action+0x74/0xbc) from [] (__do_softirq+0xe8/0x1f0)
[ 274.717742] [] (__do_softirq+0xe8/0x1f0) from [] (irq_exit+0x44/0x98)
[ 274.725982] [] (irq_exit+0x44/0x98) from [] (asm_do_IRQ+0x78/0x98)
[ 274.733947] [] (asm_do_IRQ+0x78/0x98) from [] (__irq_usr+0x40/0xa0)
[ 274.742004] Exception stack(0xdfbabfb0 to 0xdfbabff8)
[ 274.747100] bfa0: 00000000 be9bbcdd 0000000a 00000003
[ 274.755340] bfc0: 40020000 00000000 00008588 00000003 00000000 00000000 40025000 be9bbccc
[ 274.763580] bfe0: 00000000 be9bbcb8 000089f0 400da29c 60000010 ffffffff
[ 274.770233] —[ end trace c191d2c1d7b00f1e ]—
please help me to interpret and how could i correct this …
Thanks
Nidhi
Hello all,
I have just done modprobe g_serial
and then
on Beagleboard
echo “nidhi” > /dev/ttyGS0 – it works
then
cat /dev/ttyGS0
but as i type something on Hyperterminal …same error comes …on Beagleboard .
as i am able to send data from BB to hyperterminal windows machine …but not able to send it other way …
is there some problem related to usb host or device ?
please guide …has someone tried g_serial on Beagleboard successfully ?
Thanks
Nidhi
mohit hada wrote:
Hello all
I have taken the program on the link below
as suggested by Jan on this forum ...for using usb as uart on BeagleBoard xm
http://www.lvr.com/code/usb_serial_port.c
I have connected BeagleBoard uart to windows hyperterminal and its connected successfully .
Now i am able to write on uart from Beagleboard side ..
but as i read on Beagleboard ..i.e write something on Hyperterminal ..at once
These ERROR MESSAGES come on Beagleboard !!
it is not an ERROR, it is a WARNING:
[ 274.618286] WARNING: at kernel/mutex.c:207 __mutex_lock_slowpath+0x6c/0x278()
[ 274.625488] Modules linked in: g_serial rfcomm ipv6 hidp l2cap bluetooth rfkill
[ 274.632965] [<c0040c40>] (unwind_backtrace+0x0/0xdc) from [<c006cdb4>] (warn_slowpath_common+0x4c/0x80)
[ 274.642425] [<c006cdb4>] (warn_slowpath_common+0x4c/0x80) from [<c04852a0>] (__mutex_lock_slowpath+0x6c/0x278)
[ 274.652496] [<c04852a0>] (__mutex_lock_slowpath+0x6c/0x278) from [<c04854b8>] (mutex_lock+0xc/0x1c)
[ 274.661621] [<c04854b8>] (mutex_lock+0xc/0x1c) from [<c029c014>] (echo_set_canon_col+0x18/0x40)
[ 274.670379] [<c029c014>] (echo_set_canon_col+0x18/0x40) from [<c029e4d8>] (n_tty_receive_buf+0xc54/0xf38)
[ 274.680023] [<c029e4d8>] (n_tty_receive_buf+0xc54/0xf38) from [<c02a0c70>] (flush_to_ldisc+0x114/0x1e0)
[ 274.689514] [<c02a0c70>] (flush_to_ldisc+0x114/0x1e0) from [<bf09ce3c>] (gs_rx_push+0x140/0x220 [g_serial])
[ 274.699340] [<bf09ce3c>] (gs_rx_push+0x140/0x220 [g_serial]) from [<c0072e00>] (tasklet_action+0x74/0xbc)
[ 274.708984] [<c0072e00>] (tasklet_action+0x74/0xbc) from [<c0073400>] (__do_softirq+0xe8/0x1f0)
[ 274.717742] [<c0073400>] (__do_softirq+0xe8/0x1f0) from [<c007354c>] (irq_exit+0x44/0x98)
[ 274.725982] [<c007354c>] (irq_exit+0x44/0x98) from [<c003b078>] (asm_do_IRQ+0x78/0x98)
[ 274.733947] [<c003b078>] (asm_do_IRQ+0x78/0x98) from [<c003bd40>] (__irq_usr+0x40/0xa0)
[ 274.742004] Exception stack(0xdfbabfb0 to 0xdfbabff8)
[ 274.747100] bfa0: 00000000 be9bbcdd 0000000a 00000003
[ 274.755340] bfc0: 40020000 00000000 00008588 00000003 00000000 00000000 40025000 be9bbccc
[ 274.763580] bfe0: 00000000 be9bbcb8 000089f0 400da29c 60000010 ffffffff
[ 274.770233] ---[ end trace c191d2c1d7b00f1e ]---
please help me to interpret and how could i correct this ...
sorry, no idea...