Hi, i have attatched on file in which there is a timing diagram and a flow chart for ddr3 power up initialization, can any1 help me how to start writing a vhdl or verilog code for this. please. Thanks in advance.
Guest
#2670205
There are 24 steps described in the PDF, which are needed for initialization. Write a state machine, which covers the 24 steps and assign the correct values for the ports at each state.
ya in that i need to start wring from Reset which is from 4th step. but iam unable to start it how to write iam a very new for this so please can u provide me.
Usually, these kind of initialisation steps are handled by the DDR(3) controller IP. Are you intending to write your own memory controller? Writing your own DDR controller is very uncommon and usually only done when you have very special requirements (and probably happening more frequently on an own IC than on an FPGA), good skills in that area are required. Nothing for someone who claims to be "very new for this". I suggest you start using a DDR controller IP, or if you want really to do it by yourself, with a "hello world" kind of FSM (e.g. adressing an LEDS, SPI, etc. to get some idea about this). Good luck.
Actually i need to interface a ddr3 memory to an virtex6 fpga so in that this power up initialization is one of the part so i need to develop that so for making to start, what is the process and how to start.
Guest
#2670274
What I'm wondering about: you are working at iqi labs. iqi labs has (taken from their homepage) Technical expertise counts through engineers, averaging 15 years of experience in VHDL Why don't you ask your collegues about writing a state machine? State machines are very basic, and every VHDL engineer should know about it.
Guest
#2671096
I guess this is because, there are 5 students having 3 years of experience each. 5x3 = 15! Seriously, the virtex6 requires nothing else than the usage of the MIG-based DDR-3 controller core.
Actually i generated the code by using MIG long back and it is working. But again now here there is a problem with something so i need to write code for power up initialization so that is why i was searching and asking for the help.
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#2671662
> Actually i generated the code by using MIG long back and it is working. you posted on 2012-05-08 06:52 > HI, i have generated the code for ddr3 interfacing with virtex6 fpga but > iam unable to understand is that right or wrong. A mircale must have happend...