Need Help enabling USB serial debug on the Vega

[Guest Flat Computing]

Hi all,

I am trying to get USB serial debug out of the Vega. I built the

android_kernel_advent_vega with some modifications for my Prolific

USB to serial dongle. Specifically, the kernel options enabled for

USB include:

CONFIG_USB_SUPPORT=y

CONFIG_USB_ARCH_HAS_HCD=y

# CONFIG_USB_ARCH_HAS_OHCI is not set

CONFIG_USB_ARCH_HAS_EHCI=y

CONFIG_USB=y

# CONFIG_USB_DEBUG is not set

CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

CONFIG_USB_SERIAL=y

CONFIG_USB_SERIAL_CONSOLE=y

CONFIG_USB_SERIAL_PL2303=y

# CONFIG_USB_SERIAL_DEBUG is not set

After compiled, I make the boot image with kernel command line

arguments as below:

./mkbootimg --base 0x10000000 --pagesize 2048 --kernel zImage

--ramdisk ramdisk.img --cmdline "console=ttyUSB0,115200n8" -o boot.img

Yet, I can't seem to get any debug output when I boot. The kernel

just hangs. The same kernel used to boot prior to these

customizations, so I must be missing something important. Can anyone

help explain the magic to getting a linux consule out of the Vega unit?

Thanks,

Todd

[Guest simonta]

For a couple of quid, it might be easier to get a USB-Serial convertor? Assuming you want RS232?

[Guest IanTurner]

For a couple of quid, it might be easier to get a USB-Serial convertor? Assuming you want RS232?

That's what a Prolific USB to serial dongle is.

The company I work for sells a third party device with a er advanced rs232 port on it which means

we have to supply customers with one. There are only two main chipset manufacturers and one of them

produces crap drivers but can't remember if it's Prolific or FTDI

In another thread about USB gps dongles using the PL2303 chip The_corvus suggested

1) install bumble kernel

2) boot in host mode

3) with connecbot or any terminal do: insmod /system/lib/modules/pl2303.ko

4) connect your usb device

5) you will get /dev/ttyUSB0

which may or may not be of use

PS serial comms is strictly for primitive savage tribes of engineers who haven't worked

out that you're meant to bang the rocks together.

Edited June 1, 2011 by IanTurner