urgent help...

[o_mide]

need help plz...

- any reason why my above code for setup is not working??? (previous post)

- i'm ground SS pin which i should, but are there any other things i have to do on the hardware side???

[RMDumse]

Sorry, but we answer so many questions, it's hard for us to know,"previous post" refers to. We need more context to be able to help.

The SPI as a master does not need to use SS. SPI as a slave must use SS as a chip select input.

Are you using the device in question as a master or slave?

[RMDumse]

The trickiest part about using SPI is to be sure you have the CPOL and CHPA bits correct. There are only 4 possible combinations. If in doubt try them all, and see which one (or ones) work.

Also on SPI, remember the transfer is two-way. You need to read every time you write the SPI, even if you just throw away the bits. Otherwise, it won't clear for the next transfer.