Re: [Paparazzi-devel] experimental feature : persistent settings

[Martin Mueller]

Hi,

the persistent settings feature is now also available for the LPC21.

Again: It is experimental and you should never store settings while in 
flight. It might take around 40ms for the STM or even 400ms for the LPC 
to write them. No other code/irq is serviced in that time. Do not 
disconnect power while saving settings/writing to flash.

The stored settings are erased when you flash a new software, so make 
sure you put them into the aircraft xml file before recompiling/uploading.

Martin


On 25.03.2011 12:08, antoine drouin wrote:
> Hello World
>
> We just added a new experimental feature to Paparazzi : you can now
> save part or all of your "settings" to flash.
>
> In order to do that you need to define the USE_PERMANENT_SETTINGS build flag
>
> for example :
>
> <firmware name="rotorcraft">
>       <define name="USE_PERMANENT_SETTINGS"/>
>
> then you can mark a setting as persistent in your xml setting config, eg
>
>    <dl_setting var="nav_radius" MIN="-150" STEP="0.1" MAX="150"
> module="navigation" unit="m"  persistent="true" />
>
> now you can trigger the writing to flash using... a setting
>
>   <dl_setting var="settings_store_now" min="0" step="1" max="1"
> shortname ="store" handler="StoreSettings"
> module="subsystems/settings"/>
>
> Please refrain from doing this in flight as flash timings are probably
> not compatible with the mainloop timing.
>
> Eric is currently in the process of using this to implement a
> "plugless" binding for spektrum.
>
> Have fun and report
>
> Poine
>
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