Messages

1

Cxx0 Hardware / Serial Port Pinout needed 4 project

« on: October 01, 2004, 05:50:33 am »

Numbering of the male connector (that is plugged into Zaurus):

1,2 - PWR(+)
3 - TXD
4 - RXD
5 - RTS
6 - CTS
7 - DSR
8 - GND
9 - USB data plus
10 - marked as "WakeUP" in original document,
     it should be CD or RI
11 - Vcc (3.3v)
12 - USB data minus
13 - free
14 - DTR
15,16 - PWR(-)

The numbers are printed on the little board the connector is mounted upon
(at least in my case)

2

Cxx0 Hardware / SD card not being auto-mounted

« on: September 29, 2004, 10:14:49 am »

I posted this on another Zaurus board with zero response, so...

<skipped>

Any ideas?

I read this on another Zaurus board and responded  

Well, about "any ideas". After long investigations I got the conclusion that there is some inconsistency between the native driver (aka sharp_mmcsd_m.o) and SD cards protocol, and maybe Zaurus's MMC controller. I had a lot of troubles with some sorts of SD cards until I wrote my own driver. The cards started to work properly and my first reaction was "Aha!!! It's a buggy driver!". Then I was curious what was wrong with Sharp's driver. After disassembling and in-depth exploration I must say that it's the SD cards who is guilty. A lot of them
just don't support or incorrectly perform some commands. With my driver everithing is ok because during debugging I just avoided these commands. Or maybe the problem is in the MMC controller itself...

So, if you still have troubles (and maybe someone else) I can share it for experiments. For now I am intensively using KINGMAX 256M SD card partitioned on two volumes of even sizes. The first one is FAT16, the second partition is ext2.