write to sdram from sd card through sopc builder and nios2

[yupina-chan]

hi. i want to write to sdram of the fpga from my sdcard. i have done the tutorial on writing a text file to sdcard provided by altera and i was able to do it. now, i have a .bmp image in my sdcard and i want to write the data to sdram. my questions are:
1. what memory should i use for my instruction? the on-chip memory or sram?
2. about the timing, i can't seem to meet the timing requirements when a pll is added. what input and output delays should i input? and what are my basis for choosing?
3. can i ask for the source code or sample codes on the part on writing the data to sdram? my data is .bmp

i would greatly appreciate any response from you. thanks in advance.

 

[aruipksni]

see the example at
EMBEDDED SOPC DESIGN
WITH NIOS II PROCESSOR
AND VHDL EXAMPLES
chapter 17 (2011 ed)

 

[yupina-chan]

thanks for this reference. this is indeed a great help. but one more question. i already have some purpose for my sdram. so can i use the sram to save the .bmp file and use the on-chip memory to save my code? my bitmap file is about 20kb.

 

[aruipksni]

why not. if it is memory mapped, and if your ocm can contain your entire code.