Gecko OS App Memory Sections

There are various memory sections of which a programmer must be aware when writing an App.

At the highest level there are three memory types:

MCU Internal Flash

• This is where the app executable and read-only code resides
• Gecko OS also executes from this memory

MCU RAM

• This is where the application thread's stack and global data structures reside
• Gecko OS also uses this for global data structures
• An App may dynamically allocate additional RAM using malloc()

Extended Flash

• This is where the App bundles files (e.g. webpages, log files, etc) reside
• Gecko OS also uses this for sys/wifi_fw.bin and sys/safemode.bin needed for Wi-Fi functionality and fault recovery

The following diagram shows memory layout: