topic Re: Removing SD Card in Processor Expert Software

Removing SD Card

paolocolombo — Tue, 04 Nov 2014 15:53:39 GMT

Hi to all,

I'm developing an application with KE02 and SD Card, without OS, using FAT beans of processor Expert.

I've implemented a function to secure remove the SD Card, and it's ok.

Now, my problem is this: if an operator removes the SD Card without using my secure procedure, sometime the program remains in loop waiting a signal from the SD Card.

I've bypassed this problem introducing a system like watchdog and resetting the application.I would like to better manage this situation.

How can I avoid the infinite loop using the Processor Expert beans?

Thank you to all.

Re: Removing SD Card

BlackNight — Thu, 06 Nov 2014 08:16:16 GMT

Where does it loop?

The components already have a timeout functionality implemented, but maybe something is missing?

Erich

Re: Removing SD Card

paolocolombo — Mon, 10 Nov 2014 09:06:31 GMT

This is the loop:

The components settiings:

Re: Removing SD Card

BlackNight — Mon, 10 Nov 2014 11:56:45 GMT

Ok, your settings are reasonable. I think what happens is that the SPI bus transfer gets interrupted, and then the routine waits until the data arrives (which does not happen). So I that waiting loop needs to be changed to an implementation using timeouts.

Erich