(Notes from a little Workshop during HAR 2009)

Hardware Notes

Soekris net4801 GPIO pins wrong in manual

The GPIO Pins in the Soekris net4801 manual are utterly wrong (at least there is a manual, unlike for the net5501, although one with many errors...).

JP5 PinPC87366 PinJP5 PinPC87366 PinJP5 PinPC87366 PinJP5 PinC87366 Pin
3GPIO164GPIO175GPIO186GPIO19
7GPIO208GPIO219GPIO2210GPIO23

Connecting a LCD module to the 4801 JP5

This example assumes a DIP162 module.

LCD 4801        Function            PC87366 Pin

1   11      GND
2   2       VCC
3   nc      VEE (Kontrast)
4   12      RS, GPIO8           GPIO4
5   13      RW, GPIO9           GPIO5
6   15      Enable, GPIO10          GPIO13
7   3       D0 Display Data LSB, GPIO0  GPIO16
8   4       D1, GPIO1           GPIO17
9   5       D2, GPIO2           GPIO18
10  6       D3, GPIO3           GPIO19
11  7       D4, GPIO4           GPIO20
12  8       D5, GPIO5           GPIO21
13  9       D6, GPIO6           GPIO22
14  10      D7, GPIO7           GPIO23
15  nc
16  nc
17  nc      LED+
18  nc      LED-

Connecting a DS18B20 to Soekris 5501 JP5

                          __________
                         |          |
                         | DS18B20  |
       Vin               -----------
          |              1|  2|   3|
          |               |   |    |
          _               o---|----|
         | |              |   |
      4k7|_|            GND   |
          |                   |
          |                   |
uC -------o--------------------


2      = DQ   ----->   Pin X / GPIO x
1      = GND  ----->   Pin 20
3      = Vdd           GND when using parasite power
Vin    = 5V   ----->   Pin 2

External References

In english

In german

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