New MTK firmware fix update.

Troy Fardell November 2, 2012 at 3:54am

Well I had the BROM_CMD_START_FAIL issue tried numerous baud rates etc....WORKS. I swapped the tx/D- & Rx/D+ cables. I now have the big 'O' :) my proven baud rate was 38400.

So on mine the green cable went FTDI Rx --> GPS in

Henry Gan January 16, 2011 at 10:38pm

Recently just bought a new mediatek gps from DIYdrones. I have connected the mediatek gps with ftdi cable. I run the powerflash.exe as per instructions from the Arducopter googles page. I link to the 115200 baud and correct com port and selected the agent file and ROM file but it will fail the downloading. (BROM_CMD_START_FAIL)...

I have tried changing the baud rate and swopping the tx and rx cable but still fail the downloading.

Any advise?

Preston December 29, 2010 at 6:38am

Ahhh the coveted green 'O'! Using the FTDI connection direct to the gps allowed the firmware update to complete. With the new firmware, I am no longer in the Aegean Sea. Welcome back to S.W. Ohio!
Thanks for your help.

Preston December 28, 2010 at 5:28pm

Excellent. I will give this a shot in the AM and post my success. Thanks for the fast response. I love open source project!

3D Robotics

Chris Anderson December 28, 2010 at 12:43pm

Yeah, I don't think the pass-through code will work with this version. You'll need a proper FTDI cable.

I've updated the manual to make this clear.

Preston December 28, 2010 at 12:35pm

I think this firmware update is the root of my problems....however, the update fails every time with the error ...
Fail!!(Download) BROM_CMD_START_FAIL
I am using an APM with IMU. I have loaded the pass through code. This is a show stopper. Any help?

Preston.

P D October 7, 2010 at 1:00pm

Hi Joirdi, I'm having some problems updating the GPS Firmware (my Lon values are completely out of range, Lat is O.K.). Now I don't have an FTDI cable, so i'm stuck with the pass through method using the script in the manual (attached). I am using the APM.

Which baudrates should I set in the script, and what baud rate should the flash tool be communicating with?
I Tried 38400 for the APM (IMU?) and 9600 or 115200 for the GPS. Set the flash tool at 38400.

Result: [Flash Download],Fail!!(Download) DL_HANDLE error code,[Finish]

void setup()
{
Serial.begin(38400); // FTDI; this is the speed at which the IMU board is communicating with your PC
Serial1.begin(9600); // GPS; 9600 is the usual default for NMEA GPS modules
delay(10000);
}
void loop()
{
if (Serial.available())
Serial1.write(Serial.read());
if (Serial1.available())
Serial.write(Serial1.read());
}

Developer

Michael Smith September 14, 2010 at 12:00pm

I have successfully used VirtualBox to update and configure the MTK GPS units.

Andre S September 14, 2010 at 1:23am

Alex, do you mean uploading the firmware? I tried it both with the old and the new firmware via wine but failed both times (but it may be that I downloaded the wrong version of DLL's to make it work or broke it otherwise). What does work via wine is the little application showing you the satellites, etc. I ended up using an old XP laptop for uploading the new firmware. Maybe you are more lucky..

Alex September 13, 2010 at 7:59pm

Any way to make this work under linux?

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New MTK firmware fix update.

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