Netduino Mini Firmware v4.2.0 RC1

Replaced by Netduino Mini 4.2 RC3 firmware

Notes on new SD card support
This firmware includes support for SD cards and System.IO filesystem support.

It includes two functions in the new SecretLabs.NETMF.IO namespace:
StorageDevice.MountSD(...);
StorageDevice.Unmount(...);

Both the MountSD(...) and Unmount(...) features are fully implemented.

You will need to manually add the SecretLabs.NETMF.IO assembly as a reference in your project to use the SD feature. You will also need to add the System.IO assembly.

Hi Chris, what is this new feature for? the previous firmware did not need to mount or unmount the SD in order to be able to use it. What's new now?

By the way, I always wanted to ask if all the writes to the SD are committed immediately or are buffered and lazily wrote in some way.

Hi Dixon, The MountSD(...) and Unmount(...) functions are only for Netduino and Netduino Mini. Netduino Plus will auto-mount your card as usual. This is a Netduino Mini thread I believe that the SD card writes are written immediately (or at a minimum, the buffers are very tiny). Chris

Thanks Chris. By the way, is there any known issue with the debounce filter for InterruptPort on Netduino mini? I'm trying 4.2 RC1 and I get lots of interrupts when input pin changes, as if debounce filter were not working

Hi Dixon,

By the way, is there any known issue with the debounce filter for InterruptPort on Netduino mini? I'm trying 4.2 RC1 and I get lots of interrupts when input pin changes, as if debounce filter were not working

The debounce filter should work the same as before. But please note that the debouncing code in .NET MF 4.2 for the SAM7X microcontroller is very simple...it just re-reads the value a handful of times. For stronger debouncing, you'll want to grab a debouncing code sample from the forums.

Chris