Thread Tools
Old Apr 08, 2012, 11:51 PM
PhracturedBlue is offline
Find More Posts by PhracturedBlue
Registered User
Quote:
Originally Posted by NorCalMatCat View Post
I'm getting excited :P I have a question...

How possible would it be to 'add' channels? I understand this would be a limitation on the receivers end, but would it be possible for a Devo 8 to do 12 channel output to a rx1201 RX?
Yes it should be. Of course we need to understand the protocol 1st, and you'll also need custom firmware to map some interface to the new channels.
Sign up now
to remove ads between posts
Old Apr 09, 2012, 04:49 AM
rcH4x0r is offline
Find More Posts by rcH4x0r
Registered User
Quote:
Originally Posted by PhracturedBlue View Post
I was not able to connect to the SWD if I started the Tx as usual, but I was able to jump to the reset-vector from within the SWLink software and then start/halt/step through it. Is that what you found too?
I have to check it was late/early in the morning

Quote:
Originally Posted by PhracturedBlue View Post
The STLink software really isn't suitable for doing any debugging, and I don't have access to Keil or IAR. I guess I need to try out openocd, and see if I can get gdb working over the SWD port.
I seem to recall that the STLink is not compatible with OpenOCD, there are plenty of alternatives.

We still need to finish the analysis of the bootloader checks, there is a CRC check I don't fully understand and and maybe some param that are passed to the application
Old Apr 09, 2012, 09:45 AM
PhracturedBlue is offline
Find More Posts by PhracturedBlue
Registered User
Quote:
Originally Posted by rcH4x0r View Post
I seem to recall that the STLink is not compatible with OpenOCD, there are plenty of alternatives.
Well it wasn't until very recently, but I found some notes that it had been added in January (along with SWD support). I built from git and used this openocd.cfg file, and it did indeed work:
Code:
source [find interface/stlink-v2.cfg]
# increase working area to 128KB
set WORKAREASIZE 0x20000
source [find target/stm32f1x_stlink.cfg]
Old Apr 09, 2012, 02:03 PM
rcH4x0r is offline
Find More Posts by rcH4x0r
Registered User
Before I forget, LCD PCB

Telemetry PCB will have to wait
Old Apr 09, 2012, 03:32 PM
FDR_ is offline
Find More Posts by FDR_
Registered User
@rcH4x0r
Do you have those pictures in higher resolution?

I have mirrored the main board bottom picture and aligned to the top one, this way I can easier follow a line throw both side, but the images are a bit too low in resolution...
Old Apr 09, 2012, 04:02 PM
rcH4x0r is offline
Find More Posts by rcH4x0r
Registered User
I have these:

http://rch4x0r.com/DEVO8.html

But that's all right now
Old Apr 09, 2012, 05:42 PM
NorCalMatCat is offline
Find More Posts by NorCalMatCat
FPV Electronics For Life!
NorCalMatCat's Avatar
Just to be sure... the stock antenna connector on the radio is standard SMA right? (the part at the top of the radio for the main antenna, not the U.FL connector inside)
Old Apr 10, 2012, 12:20 PM
Palle_Plutt is offline
Find More Posts by Palle_Plutt
Registered User
Quote:
Originally Posted by NorCalMatCat View Post
Just to be sure... the stock antenna connector on the radio is standard SMA right? (the part at the top of the radio for the main antenna, not the U.FL connector inside)
Yes thats correct.
Old Apr 10, 2012, 01:13 PM
NorCalMatCat is offline
Find More Posts by NorCalMatCat
FPV Electronics For Life!
NorCalMatCat's Avatar
Good cause I am getting a 1 watt booster to use with my Devo :P
Old Apr 10, 2012, 01:28 PM
Palle_Plutt is offline
Find More Posts by Palle_Plutt
Registered User
Why?
Old Apr 10, 2012, 01:48 PM
NorCalMatCat is offline
Find More Posts by NorCalMatCat
FPV Electronics For Life!
NorCalMatCat's Avatar
Quote:
Originally Posted by Palle_Plutt View Post
Why?
For FPV flying, a month ago I had my plane go down for RC link loss at 1600 feet ground distance, though being in a somewhat populated area, using 2.4Ghz RC and 1.3Ghz video is not a good combo (no LC filter), so I am going to use a 1 watt booster to hopefully get out to 2 miles range :P.
Old Apr 10, 2012, 07:40 PM
Mr Trevisan is offline
Find More Posts by Mr Trevisan
Registered User
Hello, I was looking at pictures taken by xxxx is wrong but I would make the scheme possible through the images, layer circuit is simple if it seems to be a good test, I am confident that I could to make the Proteus .... .
Old Apr 10, 2012, 11:53 PM
PhracturedBlue is offline
Find More Posts by PhracturedBlue
Registered User
In case anyone is wondering about progress, I've been working on 2 things:
a) How to load a fully custom firmware into the DEVO bootloader and have it run. I'm pretty much done with this one I think. I still need to do some more testing.
b) How to communicate with the display. This is taking a longtime. Without a data-sheet, I need to determine the protocol purely from register writes. I've identified several of the routines responsible for writing to the display, including both low-level functions as well as some high-level drawing functions, and the LCD initialization function. I was hoping that the LCD initialization function would help me identify the LCD controller in use, but I wasn't able to find anything familiar that way. Currently I'm working on figuring out how to initialize the FSMC so we can actually write to the screen. My end goal is a small app that can enable the screen and draw something on it. Due to other commitments, I'm likely several days from being able to do that.
Old Apr 11, 2012, 12:43 AM
Rafa's CB100 is offline
Find More Posts by Rafa's CB100
Live to learn. . .
Rafa's CB100's Avatar

Somewhat off topic call for help


Hi Guys,

I got a Devo 8 a little while ago, and have been following this thread for a while. I'm not a programmer type, and I'll admit that this thread got over my head quick. Since you guys have your stuff down, I hope you don't mind me asking a quick, possibly simple question.

I just tried to update my Devo 8, and I couldn't ever get the computer to recognize the tx when I connected the USB cable. I'm able to get the tx into DFU mode, as the screen changes to say something about programming and shows a USB symbol, but I don't get the typical sounds I'm used to hearing from the pc when I plug in a usb device. The tx does not show up in the computer's device manager, so I can't load drivers.

I was initially trying on my Mac running Bootcamp, then tried on my pc from work, and both computers do the same thing. I'm pretty sure my usb cable is ok, as I've used it for other things recently.

Thanks, sorry for the interruption,

Rafa
Old Apr 11, 2012, 01:29 AM
FDR_ is offline
Find More Posts by FDR_
Registered User
Quote:
Originally Posted by PhracturedBlue View Post
In case anyone is wondering about progress, I've been working on 2 things:
a) How to load a fully custom firmware into the DEVO bootloader and have it run. I'm pretty much done with this one I think. I still need to do some more testing.
b) How to communicate with the display. This is taking a longtime. Without a data-sheet, I need to determine the protocol purely from register writes. I've identified several of the routines responsible for writing to the display, including both low-level functions as well as some high-level drawing functions, and the LCD initialization function. I was hoping that the LCD initialization function would help me identify the LCD controller in use, but I wasn't able to find anything familiar that way. Currently I'm working on figuring out how to initialize the FSMC so we can actually write to the screen. My end goal is a small app that can enable the screen and draw something on it. Due to other commitments, I'm likely several days from being able to do that.
I've got some information about the DEVO 10's display, but it's quite different:
BW 128x64 TG12864H-17


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Wanted Broken Walkera Devo and Spektrum tx itsmillertime Aircraft - General - Radio Equipment (FS/W) 1 Mar 20, 2012 05:37 AM
For Sale Walkera Devo 7 TX/Devo RX2625H Combo for sale Tom Z Aircraft - General - Radio Equipment (FS/W) 0 Oct 06, 2011 01:33 PM
For Sale Walkera Devo 7 TX/Devo RX2625H Combo for sale Tom Z Aircraft - Electric - Helis (FS/W) 0 Oct 05, 2011 12:38 PM
Discussion New Walkera Devention Devo 12 TX w/ Touch-Screen hobbypartz Radios 2 May 09, 2011 12:38 AM
Discussion New Walkera Devention Devo 12 TX w/ Touch-Screen hobbypartz XHeli 0 May 06, 2011 12:19 AM