[Linux-7110-psion] Re: 5mx and Bluetooth

[Albert R. <al...@ir...>]

Ok, I had some time this morning, so I hooked up CSR BC02-ext module
to LEDDRV and PHDIN lines of Windermere ASIC and turned off SiR signal
encoding for UART0. No go. That leads me to conclusion that Psion
decided to use separate RX and TX signal lines for UART0 when it's
in "normal" UART mode.  That would make perfect sense, and that's
how it's done in Cirrus Logic PS7111 ASIC in the first place. The
problem is, however, that AFAIK Windermere ASIC is made pin compatible
with older CL-PS7110, and PS7110 doesn't have "normal" uart mode of UART0,
only IRDA mode, and thus no separate TX & RX lines, only LEDDRV and
PHDIN lines. 

So, assuming that Psion traced these lines to some two pins in
Windermere ASIC, does anyone have any idea or good guess which pins
these could be? Reading thru Psion's Series_5mx_specs.pdf file makes me
believe that they are connected, at least authors of this document
were quite certain that UART0 could be used as a regular UART. The
Windermere is a 208 pins ASIC, and there're plenty of unused pins.
I would guess that thay could share it with some unused GPIO pins, but
I don't have a scope to verify it. Maybe someone with scope can give
it a try? Without knowing which pins are these, we are limited to
using UART1 and thus loosing serial port and that simply sucks.
Thanks,
 -albertr 

Albert Rybalkin writes: 

> Sorry for being silent lately... Unfortunately my 5mx's motherboard died
> last June, and it took a while for me to get a replacement, so this
> project was put aside. Meantime I ran into other projects and didn't have
> much time lately. I'm hoping to get a chance to revisit this project
> sometime after Xmas.  
> 
> Here's a page that summarise what I did so far:  
> 
> http://www.iral.com/~albertr/linux/psion5mx/blue/  
> 
> In short, I got Affix stack working with CSR BC02-ext module
> connected to UART2 at 230400 bps in full-duplex mode.
> Since I didn't want to loose serial port, I was looking for using
> UART1 instead of UART2, but was not sure if it could be possible.
> I don't have a scope to check signal levels generated by UART1.  
> 
> When I get a chance to get back to this project I'll update its status, 
> but
> by all means please feel free to pick it up from here, I'll be happy to
> hear about your progress.  
> 
> -albertr  
> 
>> Message date : Dec 06 2004, 09:37 AM
>> From : "Justin Cormack"
>> To : "Jeremy Wilkins"
>> Copy to :
>> Subject : Re: [Linux-7110-psion] 5mx and Bluetooth
>> >
>> > Hi all,
>> >
>> > A while ago someone posted about the possibility of hooking up a UART
>> > bluetooth chip to one of the serial interfaces on the 5mx. Did anyone
>> > actually try it, did they get any success?
>> >
>> > Alternatively has anyone tried using a CF bluetooth card with a initrd
>> > distro?