topic Re: How to work UART BT device on i.mx53 Android in i.MX Processors

How to work UART BT device on i.mx53 Android

brahman_river — Thu, 21 Jul 2011 12:46:32 GMT

Hi, All.

I'm working UART(RS-232C) Bluetooth device on i.MX53 Android Platform.

I tried to enable Bluetooth via configuration panel but didn't make it.

To use Bluetooth devices, is there any configuration needed against i.MX Android Package before building image?

Re: How to work UART BT device on i.mx53 Android

daiane_angolini — Thu, 21 Jul 2011 19:46:12 GMT

I´m guessing, but I believe you will need to include support for it on BoardConfig.mk (inside device/fsl).

I suppose kernel has support for your device.

Re: How to work UART BT device on i.mx53 Android

brahman_river — Fri, 22 Jul 2011 04:08:30 GMT

Hi Daiane,

Thanks for your prompt comment :)

According to the following page, it seems that an option "BOARD_HAVE_BLUETOOTH" shoule be enabled in BoardConfig.mk.

https://sites.google.com/a/android.com/opensource/projects/bluetooth-faq

I'm now rebuilding the Android image.

Best Regards,

Takashi Kawamoto

Re: How to work UART BT device on i.mx53 Android

brahman_river — Fri, 22 Jul 2011 11:10:26 GMT

Even the above option was added to BoardConfig.mk, Bluetooth could not be enabled with configuration panel.

I have no idea what to do further...

Re: How to work UART BT device on i.mx53 Android

daiane_angolini — Tue, 26 Jul 2011 16:55:30 GMT

Can kernel recognize your bluetooth device? What does dmesg show?

Re: How to work UART BT device on i.mx53 Android

brahman_river — Wed, 27 Jul 2011 00:28:08 GMT

Hi Daiane,

When the BT device was connected, dmesg said nothing. So I think the Kernel couldn't recognize it.

The attached file is .config for the kernel.

Best Regards,

Takashi Kawamoto

Re: How to work UART BT device on i.mx53 Android

daiane_angolini — Wed, 27 Jul 2011 13:50:23 GMT

oh. First step is your devices being recognized by kernel.

Connect you device on some PC, and see what´s the dmesg message for it.

Then, try to configure kernel to regocnize the same. You will need to be sure kernel version used can support it.

Re: How to work UART BT device on i.mx53 Android

brahman_river — Thu, 28 Jul 2011 04:29:17 GMT

Hi Daiane,

I've found that a command "hciattach" was required to make the kernel recognize the device.

This command was successful on the PC Linux and Ubuntu i.mx53. But I didn't make it on Android platform.

This might be because the specified device was incorrect. I guess that is "ttymxcX".

Do you know what device the serial port is regarded as?

Best Regards,

Takashi Kawamoto

Re: How to work UART BT device on i.mx53 Android

daiane_angolini — Thu, 28 Jul 2011 15:27:35 GMT

hum.... I´m confused.

kernel only recongnize device after hciattach? Before that is there none message?

I was searching around and I found a lot of people working with bluetooth dongle with android uper that 1.6 without any special procedure.

Is there any clue on your logcat?

Re: How to work UART BT device on i.mx53 Android

VikramU_ng — Mon, 08 Aug 2011 11:58:45 GMT

Hi Takashi-san,

Maybe this document helps <Anroid Bluez>

HTH.