From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Mackerras To: linuxppc-dev@lists.linuxppc.org Subject: Re: IrDA Date: Tue, 29 Feb 2000 14:47:22 +1100 Content-Type: text/plain References: <38BAD4DB.CA50A2E1@mondonet.net> MIME-Version: 1.0 Message-Id: <00022914512901.11287@argo.linuxcare.com.au> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Tue, 29 Feb 2000, Mario Scarpa wrote: > any luck in putting the irda thing into the kernel ? > Trying with a lombard with no success :( This is how far I have got with the IR port on the 101 (lombard): By default the transmitter will output a pulse of light on each change of level on the transmit data line from the serial port. To get the effect of a pulse of light for each zero bit (which is the IrDA encoding for the slower speeds, up to 115.2kB/s) you have to set the serial port chip (Z8530) to use NRZI encoding. This is not too hard for transmission but for receiving it means that you have to use the digital phase-locked loop (DPLL) in the 8530 chip. I tried setting it up to do that but I didn't have much success, the receiver got mostly garbage when I tried sending stuff to it. -- Paul Mackerras, Senior Open Source Researcher, Linuxcare, Inc. +61 2 6262 8990 tel, +61 2 6262 8991 fax paulus@linuxcare.com.au, http://www.linuxcare.com.au/ Linuxcare. Support for the revolution. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/