Micro logger

Introduction

The micro logger is simply a memory chip (S25FL128S or S25FL256S) connected to one SPI port of your autopilot.

Advantages

• very light (hard to do lighter)
• no bad connexions (the memory needs to be soldered)

Disadvantages

• hard to remove
• slower than other loggers

How to use it

Logging values

To use the micro logger you simply need to load the module "high_speed_logger_direct_memory" in your airframe file. Then you are going to have to add the GUI to your GCS by adding to your settings the file : "settings/modules/high_speed_logger_direct_memory.xml".

Then in the GCS you can go in the tab settings, then logger. In this tab you will have only one command to change the status of the module.

At the start the module is in idle mode. To start logging you will need to prepare the memory first. To do that simply select the initialise mode and validate. The module will work. To test if the module have completed it's work you can click on the value to the left of the drop down menu. Once completed the status will be back to idle.

Then you can start actually logging values by selecting the "start log" mode and validating.

Once you are done with your log you need to select the "stop log" mode and validate.

Reading the values back

To read the values back you simply need to connect to your autopilot using a serial connexion. Then start the micro logger application, at the top right of the interface you get a drop down menu containing all the serial ports available on your computer, select the one corresponding to your autopilot. Then simply click on the "Dump memory" button. The application is going to fetch all the values stored in the memory (warning this operation might be slow, up to 40 minutes if you used the entire memory).

Finally you can click on the export button at the bottom of the window to save the values in a csv file.