Re: [Paparazzi-devel] LISA/M Version Compatibility

[Luke Ionno]

Ok, by a bit of trial and error, I got things working (Lisa/M V1.0 hardware
mods + bootloader) but I have one more question:

My attempt to use the 3V USB_DETECT line didn't work, so I switched to
USB_VBUS.  Thus, when the USB is connected, my UART1 TX pin is at 5V.  Based
on the datasheet, it appears that the LEA5H does NOT have 5-volt tolerant
data lines.  Is this the case?

I would really prefer not to have to unplug the GPS every time I flash the
board.  Is there any reason I can't use the Lisa/M V2.0 makefile, etc, and
simply connect the GPS to UART3 RX and GPIO PC10 (i.e. UART3 TX)?

Thanks!

-Luke

-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Luke Ionno
Sent: Thursday, October 25, 2012 5:50 PM
To: address@hidden
Subject: Re: [Paparazzi-devel] LISA/M Version Compatibility

Sorry to revive a half-year-old thread, but I finally got around to working
on my Lisa/M 1.0, and I have a couple questions:

I've removed the pull-up resistors, and I've got a jumper going to UART1_TX;
currently I have it hooked up to USB_VBUS, but just after the USB_Detect
voltage divider (i.e. 3V, when USB is connected).  Will this work?  I
couldn't find any specific indication that the port is 5V tolerant, and I
figured I should ask before I fry something!

Also, in the bootloader instructions
(http://paparazzi.enac.fr/wiki/Lisa/M_v2.0#Uploading_the_Paparazzi_USB_Bootl
oader) , there's mention of a serial number.  Is this just for personal
reference, or is there actually a hardware ID that is assigned to each unit?


Thanks!

-Luke


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Piotr Esden-Tempski
Sent: Friday, May 04, 2012 11:58 AM
To: address@hidden
Subject: Re: [Paparazzi-devel] LISA/M Version Compatibility

Hi,

You will need to at least remove the pull-up resistors on USB_DP and USB_DM
(R28 and R27) and connect UART1_TX to 3v3 or even better to USB_VBUS to be
able to use USB. You can also remove R14 and Q2 if you want.

This means for Lisa/M 1.0 that you can only use GPS RX while using USB. That
was fixed in Lisa/M 2.0 where the use of UART1 got swapped with UART3.

I hope this helps.

Cheers Piotr

--
Transition Robotics Inc.
http://transition-robotics.com
the makers of the Quadshot
Co-Founder, Embedded systems Engineer
Mobile: +1 831 440 7454
Skype: esdentem

On May 4, 2012, at 3:58 AM, Felix Ruess wrote:

> Hi Luke,
> 
> yes, you can of course still use Lisa/M 1.0.
> I think that if you want to use luftboot (the usb bootloader) instead 
> of flashing via JTAG you will have to make some minor modifications on 
> the usb connector circuit.
> Esden, can you clear this up (and document it on the wiki)?
> 
> Apart from the fact that you have 8 servo connectors now, the actual 
> core functionality didn't change significantly.
> http://paparazzi.enac.fr/wiki/Lisa/M#Detailed_Hardware_Revision_Histor
> y
> 
> So if you already have a Lisa/M 1.0 (and you can fix the usb circuit
> yourself) there is no real need to ditch it.
> 
> Cheers, Felix
> 
> On Fri, May 4, 2012 at 3:04 AM, Luke Ionno <address@hidden> wrote:
>> I have a question about the different LISA versions.  I've got a V1.0 
>> board that I bought some time ago, and never got around to playing 
>> with, and I was wondering if (a) it is still compatible with the 
>> current software release, and (b) if there are any hardware 
>> modifications that can/should/must be implemented?  (I'm comfortable 
>> with SMT soldering, etc.)  More importantly, would it be worth the 
>> effort, or have the V2.0 modifications significantly improved 
>> functionality and usability, as a general-purpose [fixed-wing] 
>> Paparazzi
autopilot?
>> 
>> 
>> 
>> Thanks!
>> 
>> 
>> 
>> -Luke
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> Paparazzi-devel mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>> 
> 
> _______________________________________________
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