Receive on /dev/ttySA1

Hi,

i am replacing the DECT modem in my SIMpad with a bluetooth module. My problem 
is, that i cannot get the /dev/ttySA1 uart to receive any data.

Using an oscilloscope, i see, that my bluetooth module gets the correct reset 
request from hci_attach and that it returns the correct command complete 
code. Therefore i am sure, that transmit works. But the SIMpad ignores all 
data received.

If i shorten RxD and TxD following the pinout at 
http://www.opensimpad.org/internals.0.html, i don't get any echo using two 
terminals with "cat /dev/ttySA1" in one window and "echo "Hallo" 
>/dev/ttySA1" on the other one. The same setup works as i expect with ttySA0, 
so this should be working with ttySA1 as well.

I also tried the other input pins on that connector, but none of them works as 
RxD (btw why is the connector listed to be 22 pin, while it only has 20 
pins?).

Anyway, is there any magic i need to do to receive data via /dev/ttySA1? Any 
pin i have to put at a certain voltage to enable the receiver? Any help is 
greatly appreciated, since the bluetooth chip itself is working fine.

Regards,
 Till

-- 
Dr.-Ing. Till Harbaum                       Tel.:  +49 721 4998963
BeeCon GmbH                                 Fax:   +49 721 4998962
Haid-und-Neu Strasse 7, 76131 Karlsruhe     Mobil: +49 179 9087904
[email protected]                           http://www.beecon.de



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