FPGA example to wirte data to SSRAM/SDRAM in Cyclone III starter kit?

[Altera_Forum]

I want to use VHDL/verilog to write some simple data to the SSRAM/ DDR SDRAM in Cyclone III starter kit, then use control plane to read the data out. 

 Anyone has VHDL/verilog examples? just a simple write is O.k. I don't need read etc.  Thank you very much!

[Altera_Forum]

Hi,  

 Are you sure that you want to use a hardware language to read and write to off-chip mem?  I would use a simple c program in the nios environment. For starters, you could use the IOWR and IORD functions to write and read to/from memory. The address range for the memory is specified in sopc builder.   Hope that helps.     Andrew

[Altera_Forum]

Thank u, I am not sure, I am not familiar with how to use nios to read and wirte off-chip memory. 

    --- Quote Start ---  Hi,   Are you sure that you want to use a hardware language to read and write to off-chip mem?  I would use a simple c program in the nios environment. For starters, you could use the IOWR and IORD functions to write and read to/from memory. The address range for the memory is specified in sopc builder.   Hope that helps.     Andrew  --- Quote End ---  

[Altera_Forum]

Here's an example of a function to test the off-chip mem. It won't completely test the memory, but I think it is sufficient for what you're doing. MEM_TEST_VAL is whatever you want it to be as long as it's not bigger than 32 bits. Have fun.  

 int ddr2_mem_test() {  int i;  int error_count;  int readbyte;    error_count = 0;    // Write to the memory needed.  for(i=0; i<(MEM_SPAN); i++) {  IOWR_32DIRECT(DDR2_SDRAM_BASE, i, MEM_TEST_VAL);  }    // Read back and verify data.  for(i=0; i<(MEM_SPAN); i++) {  readbyte = IORD_32DIRECT(DDR2_SDRAM_BASE, i);  if (readbyte != MEM_TEST_VAL)  {  error_count++;  }  }    return error_count; }

[Altera_Forum]

I also want to read data from SSRAM using verilog, but can not succeed. 

Does anyone can share this code to read /write data from/to SSRAM? thANKS. It will be greatly helpful. pleaseeeee share here or send to chrisfzhang@gmail.com if possible.