CYC1000 Nios SDRAM example

A sample Quartus Prime project for CYC1000 works with on-board 8MB SDRAM. This project is based on the reference NIOS design provided by TrenzElectronic, and fixed sdram related issues.

Changes from original reference design

• SDRAM related port directions (input or output) defined in the top module (top.v) are fixed.
• A phase shifted PLL output and its output pin are added for SDRAM clock.
• Sample Eclipse projects are included, which use SDRAM as a main memory.

How to build and run

1. Clone this project, and open cyc1000_nios.qpf by Quartus Prime 20.1 or later.
2. Double click the top entity at the hierarchy window of the Quartus Prime, then read instructions in top.v file.
3. According to the instructions, Start Compile. Then program your CYC1000.
4. Run Eclipse from the menu [Tools->Nios II Software Build Tools for Eclipse].
5. Choose the project top directory as an Eclipse workspace.
6. Import LedCopy_bsp and LedCopy projects located under the software/ by the following steps:
   1. Click the menu [File->import], select [Nios II Software Build Tools Projectl->Import Nios II Software Build Tools Project] and click Next.
   2. Click Browse and choose software/LedCopy_bsp under the project top directory.
   3. Enter LedCopy_bsp as a project name.
   4. Click Finish.
   5. Import LedCopy project by the same steps.
7. Build LedCopy_bsp project first. After that, build LedCopy project. If you are using Linux and failed to build LedCopy_bsp due to errors in Makefile, right click the LedCopy_bsp project and re-generate bsp from [Nios II->Generate BSP].
8. Run LedCopy project by "Run As"->"Nios II Hardware".