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Honored Contributor I
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DDR SDRAM controller can not work in Cyclone IV FPGAs(EP4CE55F23C8)

I have spme questions to ask in this post. Thank you for answer me! 

 

My company made a board which features a cyclone IV FPGA (EP4CE55F23C8) and a 32MB DDR SDRAM (with 16-bit data bus),and I use Quartus 12.0. The plan is to have a NIOS II processor running on this FPGA, so we use the ddr sdram controller in Qsys. But when we configed it(we config with 8 bit data bus),the controller didn't work. We used signaltap to check the controller signals, and we found that all of the control signal and address bus was logic low, and data bus was logic high, but output clock is normal, and differential (http://www.baidu.com/link?url=09xhz__f9a0wczluv3uf6y2ngus6yx6suqsx0rrbiljunxwtpniuucigcmau5-8gq6w3i3...) clk is normal,and differential (http://www.baidu.com/link?url=09xhz__f9a0wczluv3uf6y2ngus6yx6suqsx0rrbiljunxwtpniuucigcmau5-8gq6w3i3...) clk_n is logic low. 

 

I don't konw if the configure of the ddr_sdram_controller in QSYS was wrong or some other reason.:( Thank you! 

 

addition: 

we tryed to simulate it. But made error: 

Info: Start Nativelink Simulation process 

Error: You did not generate the simulation model files or you generated the IP file using an older version of MegaCore which is not supported by RTL NativeLink Simulation 

Error: Regenerate the IP and simulation model files using the latest version of MegaCore for RTL NativeLink Simulation flow to function correctly 

Error: NativeLink simulation flow was NOT successful 

 

 

================The following additional information is provided to help identify the cause of error while running nativelink scripts================= 

Nativelink TCL script failed with errorCode: NONE 

Nativelink TCL script failed with errorInfo: Regenerate the IP and simulation model files using the latest version of MegaCore for RTL NativeLink Simulation flow to function correctly 

(procedure "get_ip_info" line 1) 

invoked from within 

"get_ip_info $full_file_name" 

(procedure "run_eda_simulation_tool" line 195) 

invoked from within 

"run_eda_simulation_tool eda_opts_hash" 

 

And my license: 

http://mail.163.com/js6/s?func=mbox:getMessageData&sid=DCJLHPBBsWvwkLqPVlBBKDWWqWvioJYa&mid=37:1tbiJ...  

 

the wave for signaltap: 

http://mail.163.com/js6/s?func=mbox:getMessageData&sid=DCJLHPBBsWvwkLqPVlBBKDWWqWvioJYa&mid=37:1tbiJ...
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