neslekkim:
Markus_L811:
Btw. the Vcc on the SPI is 5V and should be noticedOn the spi in the middle?, SHIT!, And I have been using this and that.
How can I know if my board is defunct or not ?
I was attaching an unit that is supposed to handle 3v3 and 5v, but I tried mosi++ in the middle, and the same on the edge of the board.Mixing 5v and 3v3 on an board that is not 5v tolerant is not very nice design!
Yes saw it on this http://arduino.cc/en/uploads/Main/arduino-Due-schematic.pdf.
It's true not an good move to have 5V on an 3.3V SPI some Sparcfun Shields use this Pin to detect the voltage too so they are dangerous too. Can you explain an bit more what are you have done so I can think about it.
But it musst be possible too set each Pin high and low seperatly so you can detect if it works and you can use the pins as intput to check the other way. --> Serial echo