Les instructions pour charger un programme sont detailles ici
http://lejos-osek.sourceforge.net/howtoupload.htm

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1. Upload the nxtOSEK NXT BIOS to the NXT
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Step 1: Reset the NXT<br>
To go into firmware update mode, press the reset button (at the back of the NXT, upper left corner beneath the USB connector) for more than 5 seconds while the NXT is turned on. The NXT will audibly tick when it is in firmware update mode.
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Step 2: Connect PC and the NXT by USB cable.
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Step 3: Change the current directory to a project directory (e.g. samples_c\helloworld) in Cygwin and build the target.
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Step 4: Type the following command in Cygwin.<br>
$ ./biosflash.sh
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Step 5: After a few seconds, NXT BIOS screen is displayed in the LCD.
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Step 6: If BATT: is 0, remove the battery from the NXT and insert it again, then press orange rectangle button on the NXT. NXT BIOS should be turned on.

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2. Upload a nxtOSEK program to the NXT by using nxtOSEK NXT BIOS
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Step 1: Make sure that NXT BIOS screen is displayed and upload is ready.
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Step 2: Connect PC and the NXT via USB cable.
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Step 3: Change the current directory to a project directory (e.g. samples_c\helloworld) in Cygwin and build the target.
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Step 4: Type the following command in Cygwin.<br>
$ ./appflash.sh
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Step 5: Upload status can be monitored by progress bar in the LCD display. A few seconds later, upload is finished.
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Step 6: Press EXIT button (gray colored rectangle button) to turn off the NXT.
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Step 7: Press ENTR button (orange colored rectangle button) to turn on the NXT. After nxtOSEK splash screen is displayed, nxtOSEK main screen is displayed. If a nxtOSEK program is executed from Flash, [F] is displayed in the nxtOSEK main screen. 
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Step 8: Buttons on the NXT has the following functionality:<br>
- ENTR: Turn on the NXT<br>
- EXIT: Turn off the NXT<br>
- RUN: Start the uploaded nxtOSEK program<br>
- STP: Stop the running nxtOSEK program and automatically back to nxtOSEK
  main screen<br>
If battery voltage (BATT:) is turned to be non 0 value, the NXT is ready to
run. <br>
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Step 9: To upload a new nxtOSEK program:<br>
Press ENTR + STP button for more than 1 seconds while nxtOSEK main screen is
displayed, the NXT is turned off automatically.<br>
Press ENTR button to turn on the NXT again, then NXT BIOS screen is displayed.