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Ascanio

2013-01-10 19:52

USB Serial Driver for Arduino UNO R3?

Hi fellas, first post so first of all cheers to all of you! Good work :)

I have been trying to set up my N810 to talk to my Arduino UNO R3 via USB/serial. There are a few tutorials and blog posts around, but they are all seriously dated and don't pertain to the newer version of Arduino.

At the time, Arduino boards were fitted with an FTDI chip to do the USB/serial conversion, but since the UNO was released, they have moved to the Atmega8u2 (on R1 and R2), and Atmega16u2 (on R3).

Now, they say that this chip is programmed to work just as the FTDI did before it. But nevertheless, when I connect the Arduino UNO to the N810 (Maemo DIABLO 5.2008.43-7, modified kernel from IDEO with FTDI driver, serproxy, host cable etc..), everything seems to work according to plan, but the NIT doesn't recognize the USB device.. thus failing to attach it to /dev/ttyUSB0.

Is there anybody who can give me a hand with this? I was a coder many years back and have just recently picked it up again as a hobby (I just missed it too much).

Is there any Atmega8u2 or Atmega16u2 driver out there that I can load on the N810?

Thank you!!

p.s. What I want to do is use the N810 as a rapid prototyping tool, so I can easily set up GUI's to track multiple sensor feeds while on the move (on motor vehicles). If this doesn't work, I might go a different route... either with an Arduino USB host shield, or via BlueTooth.
I just need the FlashPlayer to send and received data to/from the microcontroller.

Ascanio

2013-01-10 20:11

Re: USB Serial Driver for Arduino UNO R3?

Here is the log from dmesg:

PHP Code:


		
			
[  158.265625] tusb_source_power 633: VBUS a_wait_vrise, devctl 5d otg

171 conf c0010000 prcm 00a80500[  158.265625] musb_stage0_irq 645:

CONNECT (a_host) devctl 5d

[  158.289062] hub 1-0:1.0: state 8 ports 1 chg 0000 evt 0000

[  158.289062] usb usb1: usb auto-resume

[  158.289062] usb usb1: finish resume

[  158.289062] hub 1-0:1.0: hub_resume

[  158.312500] hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s

[  158.539062] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms

status 0x101

[  158.664062] usb 1-1: new full speed USB device using musb_hdrc and address 2

[  158.804687] usb 1-1: ep0 maxpacket = 8

[  158.804687] usb 1-1: skipped 3 descriptors after interface

[  158.804687] usb 1-1: default language 0x0409

[  158.804687] usb 1-1: new device strings: Mfr=1, Product=2, SerialNumber=220

[  158.804687] usb 1-1: Manufacturer: Arduino (www.arduino.cc)

[  158.804687] usb 1-1: SerialNumber: A4139373630351600151

[  158.804687] usb 1-1: device v2341 p0043 is not supported

[  158.804687] usb 1-1: uevent

[  158.804687] usb 1-1: usb_probe_device

[  158.804687] usb 1-1: configuration #1 chosen from 1 choice

[  158.804687] usb 1-1: adding 1-1:1.0 (config #1, interface 0)

[  158.804687] usb 1-1:1.0: uevent

[  158.804687] usbserial_generic 1-1:1.0: usb_probe_interface

[  158.804687] usbserial_generic 1-1:1.0: usb_probe_interface - got id

[  158.804687] usbtest 1-1:1.0: usb_probe_interface[  158.804687]

usbtest 1-1:1.0: usb_probe_interface - got id

[  158.812500] usb 1-1: adding 1-1:1.1 (config #1, interface 1)

[  158.812500] usb 1-1:1.1: uevent

[  158.812500] usbserial_generic 1-1:1.1: usb_probe_interface

[  158.812500] usbserial_generic 1-1:1.1: usb_probe_interface - got id

[  158.812500] usbtest 1-1:1.1: usb_probe_interface[  158.812500]

usbtest 1-1:1.1: usb_probe_interface - got id

[  158.812500] /home/dvondle/maemo_kernel/kernel-source-diablo-2.6.21/kernel-source/drivers/usb/core/inode.c:

creating file '002'

[  158.812500] hub 1-0:1.0: 100mA power budget left[  158.812500] hub

1-0:1.0: state 7 ports 1 chg 0000 evt 0002

[  158.812500] hub 1-0:1.0: port 1 enable change, status 00000103

[  160.812500] usb 1-1: usb auto-suspend

[  162.835937] hub 1-0:1.0: hub_suspend

[  162.835937] usb usb1: usb auto-suspend

shadowjk

2013-01-12 19:54

Re: USB Serial Driver for Arduino UNO R3?

With uno you're supposed to use one of the usb cdc drivers, I forget the details though.

Ascanio

2013-01-13 16:17

Re: USB Serial Driver for Arduino UNO R3?

Looks like I could recompile the FTDI driver to recognize the new VID and PID... Isn't the UNO's USB/serial firmware acting just the same as FTDI?

optimaxxx

2013-01-13 17:06

Re: USB Serial Driver for Arduino UNO R3?

yeah, Igot this working.

Ican currently program my arduino via terminal, is this what you're trying to do?

Ascanio

2013-01-13 17:09

Re: USB Serial Driver for Arduino UNO R3?

That's something I also want to do! Please tell me how!!

shadowjk

2013-01-14 01:59

Re: USB Serial Driver for Arduino UNO R3?

The Uno doesn't use ftdi, and doesn't behave like ftdi, don't try to use ftdi drivers.

Ascanio

2013-01-14 08:55

Re: USB Serial Driver for Arduino UNO R3?

Thank you for the info, in fact it was stated on a few resources online that the Atmega chip used in the Arduino UNO for USB/serial conversion was loaded with a firmware that mimics the FTDI driver in all it's behaviors, with the key difference laying in the different Vendor ID.

I will have to look further into it.

I have reflashed the N810 with the latest DIABLO image, and haven't burned the modded kernel this time. I wanted to try to load the required drivers by hand with insmod.

I found the CDC driver page, but at my first attempt (loading just the CDC USB driver) the USB port did not come to life and fire up the Arduino board. I guess there will be more modules to be installed.

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