Re: [Paparazzi-devel] Tiny v2 GPS

[Michel GORRAZ]

Just try outside and after 1 or 2mn, you should have a fix.
Next boots it should be faster.

If the GPS configuration file is correct, you're done with the GPS...

@+
Michel

2008/1/9, Uttam Chandrashekhar <address@hidden>:

I managed to get the settings into the GPS, but it stopped at one point where I just changed the baud rate to 38400 and it resumed and completed. To verify, I read the contents of the GPS into a new file and it read the contents OK, both files matched. The little "link" icon in Ucenter is not steady, it flashes, and nothing else is seen on the display, no colorful bar graphs or anything. It says "no fix". Could it be that I'm not able to acquire sats inside the house?

Is there any thing else I need to do after loading the GPS configuration files to get it to work?



-Thanks,
Uttam

----- Original Message ----
From: "address@hidden" < address@hidden>
To: address@hidden
Sent: Wednesday, January 9, 2008 7:05:54 PM
Subject: RE: [Paparazzi-devel] Tiny v2 GPS

When you flash the configuration file into the Ublox GPS you have to check a box on the window in UCENTER for it to store to flash memory.  Otherwise it will reboot with defaults again.  This could be your problem.

 

AJ

-------- Original Message --------
Subject: Re: [Paparazzi-devel] Tiny v2 GPS
From: Uttam Chandrashekhar < address@hidden>
Date: Wed, January 09, 2008 5:11 am
To: address@hidden

Correction, the length of wire between the AP and the serial adapter is only about 3" long.

It still refuses to work.

----- Original Message ----
From: Uttam Chandrashekhar < address@hidden>
To: address@hidden
Sent: Wednesday, January 9, 2008 5:36:37 PM
Subject: Re: [Paparazzi-devel] Tiny v2 GPS

Thanks, Will try reducing the wire length. Right now, its about 3.5 feet long.

Uttam

----- Original Message ----
From: Michel GORRAZ < address@hidden>
To: address@hidden
Sent: Wednesday, January 9, 2008 5:24:14 PM
Subject: Re: [Paparazzi-devel] Tiny v2 GPS

I don't know exactly if the GPS try communicating with the satellites during GPS configuration but i don't think so.
Communcating error can append if the wires between your serial adapter and the AP are too long...(make it as short as possible)

@+
Michel

2008/1/9, Uttam Chandrashekhar <address@hidden >:

Michel, it refuses to work now! Errors and retrys. What does "poor connection" mentioned in the wiki mean? Does the GPS try communicating with the satellites during GPS configuration?

Thanks,

Uttam

----- Original Message ----
From: Michel GORRAZ < address@hidden>
To: address@hidden
Sent: Wednesday, January 9, 2008 2:57:11 PM
Subject: Re: [Paparazzi-devel] Tiny v2 GPS

For the GPS receiver configuration :

- leave all the pins of the "DOWNLOAD" header unconnected : this header is used only for the Bootloader downloading (done for you) or to connect an external GPS receiver (i'm pretty sure you on't want to do that now :)
- download the UART tunnel program with the regular USB method (USB header)
- unplug the USB cable from the AP USB header and switch off the power supply
- boot on Windows
- plug your serial adapter into the AP "SERIAL" header : you only need to connect TXD1 pin#8 to RX adapter, RXD1 pin#7 to TX adapter and GND pin#1 to GND adapter.
- plug your serial adapter into your computer
- switch on the AP power supply
- now you should be ready to play with UCenter...

@+
Michel

2008/1/9, Uttam Chandrashekhar < address@hidden >:

While waiting for replacement components to arrive for the sensors, I thought I'll go ahead with the rest of the equipment. Now the GPS. How do I make the cable to install the UART tunnel? Do I use the FTDI serial adapter plugged into the "Download" header? If so, Do I need the "Boot" pin to be attached to ground? The GPS_RESET pin should be left un connected, right?

Once the UART tunnel is loaded into the AP, do I then switch to the normal USB cable to hook in onto a windows based PC to run UCenter?


-Thanks,
Uttam

-

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