Thank you, Mike.
I’ve gone thru all relevant document. Except the G400-D Dev Board schematic diagram, none concerns about the connection diagram of SD card (SPIO mode).
My code, SD card and files in the card run well in G400-D Dev Board. Now I am doing the prototype from G400TH as shown in the attached photo. The code can “New” the SD object and “Mount” the SD card. However, the disk format was damaged once after the following codes:-
VolumeInfo vi = VolumeInfo.GetVolumes();
MediaEventArgs ma = new MediaEventArgs(vi, DateTime.Now);
The vi.isFormatted return 0.
Mike, I am sure the wiring connections were done according to pin assignment laid down in the G400-D Dev Board schematic diagram. Could you help me what i am going wrong?