nvman90
Newbie level 1
SPI Help
Hey,
I'm using the Digilent NEXYS board to make a DSP.
I've already designed a function generator so I have code that allows me to use the SPI to write out to a DAC and that is working fine.
However, anytime I try to have the SPI drive multiple slaves I lose everything. I have narrowed it down the the SCK. Whenever I use the contraints file to tie the SCK signal to more than 1 pin I completely lose the SCK signal.
Any ideas on this?
I was thinking maybe you have to use different syntax in the ucf when driving multiple pins with one signal. However, if you do I can't figure it out.
Hey,
I'm using the Digilent NEXYS board to make a DSP.
I've already designed a function generator so I have code that allows me to use the SPI to write out to a DAC and that is working fine.
However, anytime I try to have the SPI drive multiple slaves I lose everything. I have narrowed it down the the SCK. Whenever I use the contraints file to tie the SCK signal to more than 1 pin I completely lose the SCK signal.
Any ideas on this?
I was thinking maybe you have to use different syntax in the ucf when driving multiple pins with one signal. However, if you do I can't figure it out.
