Is there any way to have 2 application or run application in external memory?

[JungHeum_Park]

I want to run various applications in some cases

what I want is:

In general, it runs own application.

When external memory(SD card, USB, EEPROM, etc... something like this) that have firmware connected and give some signal(GPIO input or interrupt, etc....), application in external memory is run.

And when external memory disconnected, it runs own application again.

or

Have 2 application. In general, runs one of them. With some signal, runs other one. Without signal, run first one again.

If not the above method, I wonder there is any way to run two applications in some cases without update.

thanks

[cbd]

I'd suggest that you look at using a bootloader to load the program data from the SD card if the GPIO line is set in some state on start-up, otherwise load the program from elsewhere. It would mean that you need to place a copy of your standard program in an area of NVM that won't be overwritten.

I'm not sure if you could reliably do this without a restart. I guess that you could have precompiled code and the load it to an area of program memory that has some function pointers set to it.

[Vidar Berg]

Hi,

It's not possible to execute code in external memory, so as @cbd noted, you have to load it to internal memory first. Maybe the app from the external memory is small enough to be loaded to RAM and executed from there?