AM3517EVM Debugging Port

Hi,

Yes, it's possible to use a USB connection for debug.

Ideally it's best to use Ethernet as detailed at http://processors.wiki.ti.com/index.php/How_to_Run_GDB_on_CCSv5 but alternatively one can run the g_serial driver on the OTG port to provide a serial connection.

First rebuild the kernel using the instructions in the Sitara Developers Guide. Before building, be sure to enable the g_serial driver by enabling:

Device Drivers ->

USB Support ->

<*> Inventra Highspeed Dual Role Controller (TI, ADI,..)

*** Platform Glue Layer ***

<*> AM35x

Driver Mode (USB Peripheral (gadget stack)

USB Gadget Support ->

<M> USB Gadget Drivers (Serial Gadget (with CDC ACM and CDC OBEX))

Once rebuilt, copy the resulting g_serial.ko module to /lib/modules/2.6.37/kernel/drivers/usb/gadget/. Boot with new kernel. Run 'depmod -a'. Run 'modprobe g_serial'.

At this point you may run 'gdbserver --baud <my_favorite_baud_rate> /dev/ttyG0 <my_binary_to_debug>'

On the host side, plug in a USB cable to the OTG port miniusb. The host's ACM client driver will instantiate a /dev/ttyACM0 serial device. At this point it's possible to execute 'arm-arago-linux-gnueabi-gdb --baud <my_favorite_baud_rate>' on the host. At the command prompt the target can be connected by:

(gdb) target remote /dev/ttyACM0

Alternatively, CCSv5 can be configured to use serial transport rather TCP for Ethernet transport by modifying the debug connection configuration with the values above.

Regards,

Matt