BCM2035 over UART on Palm T|T3

From: [email protected]
Reply-To: BlueZ development <[email protected]>
To: [email protected]
Subject: [Bluez-devel] BCM2035 over UART on Palm T|T3
Date: Wed, 3 Jan 2007 21:22:43 +0100

Hi all,
It happend that I have Palm T|T3 and hack linux for it(don't ask how). This gadget have Broadcom's BCM2035 connected over UART interface and PXA261 CPU.
The biggest problem is, that I haven't managed to get even single byte from it. And I am shure it is on UART I am trying(when i disable it in Palm OS BT stops working).
My plan was to kick off Palm OS and just before booting linux start to talk to BT. I have copied get version command from hciattach to end of bootloader(Garux). Than enabled BT in Palm OS, and executed bootloader and it simple doesn't return single byte.

My question is, do I need to send any special character(like break) or something else, UART should be properly configured from Palm OS. And what should be proper testing command to send to get response.

And also if anyone have seen that chip's wiring, are there any other wires that should be connected to CPU and I should find in order to communicate with it.

Martin Kupec

Hi Kupec,
Maybe you should validate your UART has been drived by your OS,and you
can test it using oscillograph or electronic multimeter.
In my experience, no need to send any special character, just send
bluetooth reset command.
gao

Quoted 26 lines

From: [email protected]
Reply-To: BlueZ development <[email protected]>
To: [email protected]
Subject: [Bluez-devel] BCM2035 over UART on Palm T|T3
Date: Wed, 3 Jan 2007 21:22:43 +0100

Hi all,
It happend that I have Palm T|T3 and hack linux for it(don't ask how).
This gadget have Broadcom's BCM2035 connected over UART interface and PXA261 CPU.
The biggest problem is, that I haven't managed to get even single byte
from it. And I am shure it is on UART I am trying(when i disable it in Palm OS BT stops working).
My plan was to kick off Palm OS and just before booting linux start to talk to BT. I have copied get version command from hciattach to end of bootloader(Garux). Than enabled BT in Palm OS, and executed bootloader and it simple doesn't return single byte.

My question is, do I need to send any special character(like break) or something else, UART should be properly configured from Palm OS. And what should be proper testing command to send to get response.

Quoted 5 lines

And also if anyone have seen that chip's wiring, are there any other wires that should be connected to CPU and I should find in order to communicate with it.

Martin Kupec

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