How to store file from RS232 to SDRAM/FLASH/SRAM ?

This is for SRAM:

1. the RS232 should pass 1'st the RS232 to LVTTL or LVCMOS by hardware

2. then, in FPGA you may instantiate UART (with the right settings and BOUD rate).

3. Then, when you get the octets, each octet should be written into SRAM (produce WR pulse) and address counter. should be incremented to next sample location.

The lrvrl converter may be the following:

http://focus.ti.com/lit/ds/symlink/trsf3221e.pdf

for UART.... you should write it or get something like this:

http://soursecodes.blogspot.com/

You need only the RX part and the modules which serve it...

For writing into SRAM look at the DPR specification. It is usually like this:

CLK: ____________|--------------

_________

xxxxxxxxxx WR DATA xxxxxxxxxxx

-------------

_________

xxxxxxxxxxx WR ADDR xxxxxxxxxxx

-------------

WR_EN ____|-----------|__________