simple project with DMA

[Altera_Forum]

I've been working a long time with NIOS II Stratix edition. 

I want to improve my system&#39;s performance by adding DMA. My problem is, that everything is working well. However if only add DMA to my system, even a simple printf instruction doesn&#39;t print on the screen hrough jtag. As a target I want to copy data from custom peripheral to SDRAM memory. However at this time I just want my project to work with DMA instantiated. If you have suggestions, please write. Or could give me a link to a simple project which uses DMA. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/wink.gif

[Altera_Forum]

Most (if not all) "Full Feature"ed designs have Avalon DMAs. There is nothing special about adding a DMA. It&#39;s just another Avalon master. 

 I would double check your SOPC Builder design to make sure that your processor is still connected, correctly. Additionally, I would step through all of the code in alt_sys_init() to determine what (if anything) is failing to initialize.  Cheers,  - slacker

[Altera_Forum]

--- Quote Start ---  originally posted by slacker@Jun 19 2006, 12:19 PM most (if not all) "full feature"ed designs have avalon dmas.  there is nothing special about adding a dma.  it&#39;s just another avalon master.  i would double check your sopc builder design to make sure that your processor is still connected, correctly.  additionally, i would step through all of the code in alt_sys_init() to determine what (if anything) is failing to initialize.  cheers,  - slacker <div align='right'><{post_snapback}> (index.php?act=findpost&pid=16253)  --- quote end ---    --- Quote End ---   there is examples in the nios2 software development handbook

[Altera_Forum]

Hi http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif Thank you for the advices 

I verified the cpu connections, alt_sys_init and I looked to the handbook. All of the devices are instantiated and initialized in the alt_sys_init (as those in full_featured system from design example from nios2 kit), the cpu is configured as before adding dma so it should be fine. HOWEVER it&#39;s NOT http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif  Do you know any other reason?

[Altera_Forum]

Hi http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif Thank you for the advices 

I verified the cpu connections, alt_sys_init and I looked to the handbook. All of the devices are instantiated and initialized in the alt_sys_init (as those in full_featured system from design example from nios2 kit), the cpu is configured as before adding dma so it should be fine. HOWEVER it&#39;s NOT http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif  Do you know any other reason?