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first,i am sorry about my english...==!
fpga:Cyclone IV E EP4C40F23C8 ddr2:MT47H32M16-25E.Data bitwidth is 16.There are 4 chips,two of them connect to the bottom side of FPGA,another two is connect to the top side of FPGA,see the attchment sch_ddr2.pdf for detail. software:Quartus II 13.1 attachment 2 is the tcl script of pin assignment . the ddr2 controller's reference clock source is a a 50MHZ crystal (PIN_G1) my flow of create a ddr2 test project: 1,create a empty project for EP4C40F23C8 2,Instantiate a ddr2 controller of ALTMEMPHY controller,and config...as the picture show https://dl.dropbox.com/s/mq1t8gc7c3m2rv1/ddr2_ctrl1.jpg https://dl.dropbox.com/s/iqdon8fp37a15fs/ddr2_ctrl2.jpg https://dl.dropbox.com/s/l5cssglf0enc0ac/ddr2_ctrl3.jpg https://dl.dropbox.com/s/rril6uyyst2ptcq/ddr2_ctrl4.jpgLink Copied
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https://dl.dropbox.com/s/q8v3ic4oss7v2fx/ddr2_ctrl5.jpg
https://dl.dropbox.com/s/seqhnhokst0r1vb/ddr2_ctrl6.jpg https://dl.dropbox.com/s/ocjqiqdm2fvi8bo/ddr2_ctrl7.jpg https://dl.dropbox.com/s/43iojeu7b1tpgsh/ddr2_ctrl8.jpg 3,after Instantiate ddr2 controller,i add xxx_example_top.v and xxx_example_driver.v to my project,and set the xxx_example_top.v as the top entry.. 4,run the ddr2_ctrl_phy_ddr_pins.tcl,ddr2_ctrl_phy_ddr_timing.tcl,ddr2_ctrl_pin_assignments.tcl,ddr2_ctrl_phy_report_timing.tcl, ddr2_ctrl_phy_autodetectedpins.tcl,ddr2_ctrl_phy_report_timing_core.tcl 5,pin assignment :run the pin_assignment_ddr2.tcl(see attchment) 6,timing contrain..add ddr2_ctrl_phy_ddr_timing.sdc and ddr2_ctrl_example_top.sdc... 7,start analysis & Synthesis.... 8,create signaltap instance and add the local_init_done signal.. 9,full compile...- Mark as New
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https://dl.dropbox.com/s/u55onq23etlxywi/report1.jpg
problem: 1,the signal of local_init_done is always low when the i set the reference clock of ddr2 controller to 50MHZ,I use a Oscilloscope to test pin A-DDR2-CK,it is 125MHZ 2,the signal of local_init_done is high when i set the reference clock of ddr2 controller to 100MHZ(actually is a 50MHZ crystal.............),I use a Oscilloscope to test pin A-DDR2-CK,it is 62.5MHZ(==!.................................) https://dl.dropbox.com/s/ewa48imv4ae6zda/report2.jpgquestion: 1,how to use altpll's clk output as the input refence clock of ddr2 controller,because i must Instantiate two controller.I have tried to add a altpll,but some critical warning turn out about dedicated clock..... 2,after i add the mem_addr siganl to signaltap instance,there are many critical warning...more then 200....
if you can't see the picture please download the attachment 3:screenshot.zip
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