Hi
I wanted to ask if anybody could give me some tips on attaching a USB device to my A13-SOM.
I use the A20-SOM for initial dev work (easy nfs boot etc) and then migrate over to the A13-SOM. First issue is I can't find the USB pins when looking at the schematic, so far I've searched:
http://free-electrons.com/~maxime/pub/datasheet/A13%20user%20manual%20v1.2%2020130108.pdf
https://www.olimex.com/Products/SOM/A13/A13-SOM-512/resources/A13-SOM512_sch.pdf
Looking at the Olimex PNG, I can see:
processor pin 97 V3 _USB : unknown
processor pin 15 USB0-DRV : GPIO3 pin 6
processor pin 153 USB0-IDDET : GPIO3 pin 4
processor pin 154 USB0-VBUSDET : GPIO3 pin 2
How does the above map to USB [ + D+ D- - ]
Which pins on the A13-SOM headers should I attach my usb?
As always, any help would be much appreciated!
Thanks
Bruce
USB-HOST
processor pin 96 UDP1 D+ GPIO-2 pin 5
processor pin 95 UDM1 D- GPIO-2 pin 7
USB-OTG
processor pin 94 UDP0 D+ GPIO-2 pin 1
processor pin 93 UDM0 D- GPIO-2 pin 3
Look at the A13 (not SOM) schematic for more info
https://github.com/OLIMEX/OLINUXINO/blob/master/HARDWARE/A13-OLinuXino/A13-OLinuXino_WIFI_Rev_E.sch.pdf
Hi Gerrit
Excellent, thank you!!
What are you doing for the USB 5V + and - ?
Thanks
Bruce
The chip data sheets etc are also worth close attention. Usually I find the newest are on linux-sunxi.org
John
Quote from: bruceuk on December 10, 2014, 03:36:27 PM
What are you doing for the USB 5V + and - ?
Any decent 5 Volt 500mA - 1A power supply will do, connect the - also with the ground of the board
Got it, thanks!!
Actually realized it was a bit of a stupid question :)
Picked up one of these bad boys so will have a go this evening:
http://www.auseparts.com.au/image/cache/data/Arduino/Accessories/MB102%20Breadboard%20Power%20Supply%20Module%203.3V_5V%20BB-500x500.png
Bruce