Hmm
like many others I'm stunned at how difficult it is to add an SRAM component to a NIOS system. Two days and
so far all I can get is a mishmash of signals that seem to bear no relation to the pins I specified.
Does anyone have a link to the absolute simplest - latest version Qsys - No problems with 'unasserted clock' stuff - 512k x 8 SRAM. The absolute simplest - including how to attach the pin numbers properly - I must have been through pin planner a dozen times and sometimes it insists on deleting everything I've done.
I've had it as far as writing signals to some of the SRAM pins but they seem to bear no relation to the pin numbers I connect to in the BDF.
I don't doubt I'm very new to Altera and Qsys but getting this SRAM business working really seems to be a step beyond - I was expecting a couple of hours work :(
Sorry for the downhearted tone - was getting on so well with it all but like a lot of others the complexity involved for this '1st step' of adding RAM is very steep.
Thanks to anyone that can help out - it really is hair tearing stuff isn't it.
Pete
I've been working through with this guide:
http://www.cs.columbia.edu/~sedwards.../4840/lab3.pdf
I'll also have a look at this recent post which seems to show an 8 bit system.
http://www.alteraforum.com/forum/sho...ght=sram+8+bit
The main issue I'm having is how to define the pin assignments and lock them down - preferably programatically rather
than use the GUI - I'm finding that some way that I'm working with Quartus is resulting in the assignments being remade
every so often - if the pins are unused at that point on the BDF the assignments lose all directional settings for example.
If I do use the GUI - which of the screens do I lock the Pin assignments down in - the Assignment Editor or Pin Planner?
I've seen the importing assignments file option but is there any file that I can just open and save in an editor tht will get picked
up by the compilation train?
like many others I'm stunned at how difficult it is to add an SRAM component to a NIOS system. Two days and
so far all I can get is a mishmash of signals that seem to bear no relation to the pins I specified.
Does anyone have a link to the absolute simplest - latest version Qsys - No problems with 'unasserted clock' stuff - 512k x 8 SRAM. The absolute simplest - including how to attach the pin numbers properly - I must have been through pin planner a dozen times and sometimes it insists on deleting everything I've done.
I've had it as far as writing signals to some of the SRAM pins but they seem to bear no relation to the pin numbers I connect to in the BDF.
I don't doubt I'm very new to Altera and Qsys but getting this SRAM business working really seems to be a step beyond - I was expecting a couple of hours work :(
Sorry for the downhearted tone - was getting on so well with it all but like a lot of others the complexity involved for this '1st step' of adding RAM is very steep.
Thanks to anyone that can help out - it really is hair tearing stuff isn't it.
Pete
I've been working through with this guide:
http://www.cs.columbia.edu/~sedwards.../4840/lab3.pdf
I'll also have a look at this recent post which seems to show an 8 bit system.
http://www.alteraforum.com/forum/sho...ght=sram+8+bit
The main issue I'm having is how to define the pin assignments and lock them down - preferably programatically rather
than use the GUI - I'm finding that some way that I'm working with Quartus is resulting in the assignments being remade
every so often - if the pins are unused at that point on the BDF the assignments lose all directional settings for example.
If I do use the GUI - which of the screens do I lock the Pin assignments down in - the Assignment Editor or Pin Planner?
I've seen the importing assignments file option but is there any file that I can just open and save in an editor tht will get picked
up by the compilation train?