Re: Issue with custom IOIO based project

[Guillaume Madore]

Hi Mikhail,

thanks for replying.  I had forgotten about this thread. I actually meant 
that I didn't need device mode... I fixed the issue by grounding the usbid 
pic pin (with no resistor). This enabled the connection between my android 
app and my custom ioio. And yes I do have a usb-a connector on my board and 
I'm using a cut and spliced usb-a male to male cable to connect to the pc 
to flash the application firmware.

So I'm now able to flash the bootloader and application and use my app with 
my custom board. I do still have other issues with inputs/outputs/power 
management so I'm still looking for an electronics expert (ideally with an 
automotive background) to help me complete the project.  

>
>>

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Re: Issue with custom IOIO based project

[Mikhail Evstafyev]

Hello Guillaume,

I believe that when connected to Android the IOIO-OTG works as USB host. 
When connected to PC the IOIO-OTG works as a USB peripheral node (aka USB 
device).

>I'm using a usb-a connector on my board as I have no need for host mode
You are probably mixing things as the USB-A connector is for USB host and 
USB-B is for device.

As you were able to connect IOIO to PC in bootloader mode then I think that 
you actually have USB-B connector on your board (or mini-B, or micro-B).

You should not skip the host mode if you want to have communication with 
Android.

BR,
Mikhail


On Wednesday, 7 June 2017 19:33:49 UTC+3, Guillaume Madore wrote:
>
> Hello all,
>
> so I've been working on a project that is IOIO based (new pcb but 100% 
> IOIO based just with added components). I'm not an electronics expert so I 
> had help designing it but the guy helping me just doesn't have much time 
> anymore so I'm trying to finish it myself. It's almost done and I've 
> soldered the main components to be able flash the PIC.
>
> I've bought a PICKit 3 and managed to flash the bootloader. I then was 
> able to connect it to a pc in bootloader mode and flash the application 
> firmware. The connection works well and I can see with the versions command 
> that the bootloader and app seem ok.
>
> But the thing is, when I connect my board to an android device, it does 
> charge it but my android app doesn't work/connect. The same device/app/usb 
> cable were used with a IOIO Board and were working well. I've since bricked 
> all my IOIOs so I can't really confirm 100% but I'd say 95% sure that the 
> same setup would work on a IOIO. I'll probably end up buying another IOIO 
> just to make sure everything does work... 
>
> I'm no usb connection expert either but since I can connect it to a pc and 
> update the application, I would guess that d+ and d- couldn't be mixed up? 
> And since my device does say that it's charging, the 5v/gnd usb connections 
> must be ok too?
>
> I'm using a usb-a connector on my board as I have no need for host mode. 
> I've tried to pull up/pull down the usbid pin on the pic with a 10k res 
> before connecting to android and it made no difference either. What would 
> be my next logical thing to try?
>
>
> 
>
>
> If any experts are interested, I'd be willing to pay you for consultation 
> work to finish this thing...
>
> Thanks
>
>   
>
>
>

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