Comments on: Arduino USB host – First programs.

By: oleg

oleg — Fri, 25 Jun 2010 21:58:17 +0000

Thanks for posting this! My guess is you are talking about Sparkfun shield since mine is powered from 5V and not from Vin. As a result, it will work off of USB power with no problems.

By: Tom

Tom — Fri, 25 Jun 2010 18:28:40 +0000

last time i got all Errors from above this thread. the prob`s solved when i connect to a power-supply, then OSCOKIRQ will now work without undervoltage(VIN)–SPI also run`s like hell :-)Every Device will connect as defined(fast/slow) and no errors at all.

think PC 5v from Arduino-Host is a little bit too small to support the usb-shield when testing githuk-files;-)
All of the testfiles from githuk now working perfectly…i`am very happy!!

dont forget to spend Volts on the Board! :)

Good work @oleg!

By: Richard

Richard — Sun, 16 May 2010 20:13:01 +0000

Also remember the Sparkfun USB Host Shield is powered from Vin.
Do you have an external power supply to Vin ?

By: Richard

Richard — Sun, 16 May 2010 20:10:25 +0000

Did you make the changes required for the differences in the Sparkfun shield ?
the pin numbers are not simply swapped.
For the Sparkfun shield the reset must be on #define MAX_RESET 8
MAX_GPX is not used, but is best as #define MAX_GPX 7

By: oleg

oleg — Sun, 16 May 2010 10:37:19 +0000

It looks broken to me.

By: yashar

yashar — Sun, 16 May 2010 08:51:40 +0000

not yet, but cant you suggest anything? am i missing anything?

By: oleg

oleg — Sun, 16 May 2010 08:48:45 +0000

Have you tried contacting Sparkfun yet?

By: yashar

yashar — Sun, 16 May 2010 06:47:50 +0000

i have bought it from sparkfun. but here are the step i took!!!
i have all the source code necessary and the board and i swapped the pin numbers for GPX and RESET but it seems like nothing is getting written in the max3421e registers cause when i read them i dont get the same values . i even run your above codes that prints registers and all the registers are 00 and im getting “Error: OSCOKIRQ failed to assert” and “Error: Vbus overload” as well. however GPIN0-7 and GPout0-7 are not attached to anything in my board. i was wondering if they are significant or i should attach them some circuitry that im not aware of!!!

thanks

By: oleg

oleg — Sun, 16 May 2010 06:23:52 +0000

You can’t get vbus.overload error unless you get a short somewhere. Did you make this shield yourself or bought it here?

By: yashar

yashar — Sun, 16 May 2010 03:57:28 +0000

hi,
i am uploading the codes in my usb host shield and im getting errors like “Error: OSCOKIRQ failed to assert” and “Error: Vbus overload”. these errors come from the max.poweron(). and there is a problem with reading and writing max3421e regiters using spi protocol. also, i dont know if i have to connect gpin0-7 to anything or not!!
please help

thanks
yashar