Re: [Paparazzi-devel] 回复： Why the rotorcraf t have a lower message frequency from ubloxGPS module?

[Chris Gough]

I believe with uBlox generation 6, 5Hz is always OK when the firmware is 
running from ROM (e.g. NEO-6Q), and sometimes OK when the firmware is running 
from Flash (e.g. LEA-6H), depending on settings.

I'm not aware of problems running generation 6 flash-backed modules at 4Hz, 
does anyone have specific guidance?

Chris Gough

On 29/07/2013, at 5:28 PM, Christophe De Wagter <address@hidden> wrote:

> The line you indicate is the correct line for changing the rate. 0xFA hex = 
> 250 millisecond in that case. 
> 
> The 4Hz dates back from the LEA-4 and initial LEA-5 generations. 
> 
> I somewhere read that some devices were capable of 5Hz instead of 4Hz, but it 
> depends on the series AND on the firmware in the device.
> 
> Somewhere else during an update to newer LEA-5 firmware I read that UBlox 
> recommends to program the devices to 2Hz only as they might not always be 
> able to keep up. 
> 
> For the latest firmwares and devices I am not aware of the recommendations. 
> 
> If you try new settings I would recommend to analyse the result with the full 
> u-center program directly to the GPS to see the effects. When you have news, 
> it is highly appreciated if shared here.
> 
> -Christophe 
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