Hi experts,I am using Agilex 7 (AGFB022R25A2I3V). I wish to use the internal bridges to write to and read from DDR4.My idea is like this,...Build a internal connections using Platform Designer in Quartus Prime Pro. Then generate the Avalon-mm addresses of the DDR4.At the Linux driver / application code, we write C program to write to and read from the specific address of the DDR4.Do you know where I can find such sample project? I have been trying to search for months yet still can't find it. I have gone through a lot of intel documents and video clips. Yet still they can't help.I am still not successful in implementing my requirement.Could you please help?Regards

Is that an SoC device? Are you talking about the dedicated EMIF for the HPS in an SoC or just a standard EMIF connected to the FPGA? Lots of info available.EMIF IP user guide: https://www.intel.com/content/www/us/en/docs/programmable/683216/23-2-2-7-1/about-the-external-memory-interfaces.htmlExample design user guide: https://www.intel.com/content/www/us/en/docs/programmable/683162/23-1-2-7-0/about-the-external-memory-interfaces.htmlTraining: https://learning.intel.com/developer/learn/courses/89/introduction-to-memory-interfaces-in-intelr-agilex-devices

Hi sstrell,I have gone through and followed the documents you recommended. Still I still get errors when I tried to generate using Platform Desginer.I followed the document to make an EMIF IP and integrate it into the GHRD built from https://www.rocketboards.org/foswiki/Projects/SettingUpAndUsingBridgesOnAgilexI still got the error, ...HPS_OSC_CLK input is required to drive the main PLL. But the pin has not been specified in the HPS I/O selection.Error: clk_100: "Board" (board) "default" is out of range: "Unknown", "Agilex Development Kit", "Arria 10 SoC Development Kit", "Stratix 10 SoC Development Kit", "Unknown"I don't know how to solve these errors. Could you please guide me?By the way, what's the difference between1. External Memory Interfaces for HPS Intel Agilex FPGA IP and2. External Memory Interfaces Intel Agilex FPGA IP?I can see that #1 has hps_emif conduit while #2 doesn't have. But if you use Hard Processor System Intel Agilex FPGA IP, it has hps_emif. If you use #1, you can connect with the hps_emif together. If you use #2, the hps_emif will have no connection.If you follow the attached document, it's guiding you to make #2.For read/write with DDR4, which one should be used?After the above is built, at the Linux side, how can I write to and read from the DDR4 addresses? For this requirement, I can see that there are 2 parts. One at the FPGA and one at the SoC Linux. Do you have the sample of this kind of project?Regards

Hi sstrell,Is there any answer for this?Regards

Hi There is an example for interfacing with DDR4 with the example below:https://www.intel.com/content/www/us/en/support/programmable/support-resources/design-examples/horizontal/fpga-to-hps-bridges-design-example.htmlRegardsJingyang, Teh

hi Jingyang,Thanks for coming back.But can we use the Arria 10 or Cyclone V method on Agilex 7? Their architectures are different.Regards,

Agilex 7 interface with DDR4 | Altera Community

27 Replies

sstrell
Super Contributor
2 years ago
Is that an SoC device? Are you talking about the dedicated EMIF for the HPS in an SoC or just a standard EMIF connected to the FPGA? Lots of info available.
EMIF IP user guide: https://www.intel.com/content/www/us/en/docs/programmable/683216/23-2-2-7-1/about-the-external-memory-interfaces.html
Example design user guide: https://www.intel.com/content/www/us/en/docs/programmable/683162/23-1-2-7-0/about-the-external-memory-interfaces.html
Training: https://learning.intel.com/developer/learn/courses/89/introduction-to-memory-interfaces-in-intelr-agilex-devices
- nelky
  Occasional Contributor
  2 years ago
  Hi sstrell,
  I have gone through and followed the documents you recommended. Still I still get errors when I tried to generate using Platform Desginer.
  I followed the document to make an EMIF IP and integrate it into the GHRD built from https://www.rocketboards.org/foswiki/Projects/SettingUpAndUsingBridgesOnAgilex
  I still got the error, ...
  HPS_OSC_CLK input is required to drive the main PLL. But the pin has not been specified in the HPS I/O selection.
  Error: clk_100: "Board" (board) "default" is out of range: "Unknown", "Agilex Development Kit", "Arria 10 SoC Development Kit", "Stratix 10 SoC Development Kit", "Unknown"
  I don't know how to solve these errors. Could you please guide me?
  By the way, what's the difference between
  1. External Memory Interfaces for HPS Intel Agilex FPGA IP and
  2. External Memory Interfaces Intel Agilex FPGA IP
  ?
  I can see that #1 has hps_emif conduit while #2 doesn't have. But if you use Hard Processor System Intel Agilex FPGA IP, it has hps_emif. If you use #1, you can connect with the hps_emif together. If you use #2, the hps_emif will have no connection.
  If you follow the attached document, it's guiding you to make #2.
  For read/write with DDR4, which one should be used?
  After the above is built, at the Linux side, how can I write to and read from the DDR4 addresses?
  For this requirement, I can see that there are 2 parts. One at the FPGA and one at the SoC Linux. Do you have the sample of this kind of project?
  Regards
  ug-ag-emideug-19-3-683162-705380.pdf859 KB
nelky
Occasional Contributor
2 years ago
Hi sstrell,
Is there any answer for this?
Regards
tehjingy_Altera
Regular Contributor
2 years ago
Hi

There is an example for interfacing with DDR4 with the example below:
https://www.intel.com/content/www/us/en/support/programmable/support-resources/design-examples/horizontal/fpga-to-hps-bridges-design-example.html

Regards
Jingyang, Teh
- nelky
  Occasional Contributor
  2 years ago
  hi Jingyang,
  Thanks for coming back.
  But can we use the Arria 10 or Cyclone V method on Agilex 7? Their architectures are different.
  Regards,
nelky
Occasional Contributor
2 years ago
Hi,
I tried to run compilation at the Quartus Prime Pro 22.1.
A lot of pins needs to be removed in the ghrd_agilex_top.vhd, such as (pls look at the commented off ones)
entity ghrd_agilex_top is

port
(
--Additional refclk_bti to preserve Etile XCVR
refclk_bti : in std_logic;

fpga_clk_100 : in std_logic_vector(1-1 downto 0);
fpga_led_pio : out std_logic_vector(4-1 downto 0);
fpga_dipsw_pio : in std_logic_vector(4-1 downto 0);
fpga_button_pio: in std_logic_vector(4-1 downto 0);

FPGA_UART0_RX : in std_logic;
FPGA_UART0_TX : out std_logic;
FPGA_UART1_RX : in std_logic;
FPGA_UART1_TX : out std_logic;

FPGA_RS422_RXD : in std_logic;
FPGA_RS422_TXD : out std_logic;
FPGA_RS422_RE : out std_logic;
FPGA_RS422_DE : out std_logic;
FPGA_TESTIO1 : in std_logic;
FPGA_TESTIO7 : in std_logic;
FPGA_TESTIO8 : out std_logic;
--FPGA_TESTIO2 : in std_logic;

--HPS
-- emif_hps_mem_mem_ck : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_ck_n : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_a : out std_logic_vector(16 downto 0);
-- emif_hps_mem_mem_act_n : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_ba : out std_logic_vector(1 downto 0);
-- emif_hps_mem_mem_bg : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_cke : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_cs_n : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_odt : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_reset_n : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_par : out std_logic_vector(1-1 downto 0);
-- emif_hps_mem_mem_alert_n : in std_logic_vector(1-1 downto 0);
-- emif_hps_oct_oct_rzqin : in std_logic;
emif_hps_pll_ref_clk : in std_logic;
-- emif_hps_mem_mem_dbi_n : inout std_logic_vector(9-1 downto 0);
-- emif_hps_mem_mem_dq : inout std_logic_vector(72-1 downto 0);
-- emif_hps_mem_mem_dqs : inout std_logic_vector(9-1 downto 0);
-- emif_hps_mem_mem_dqs_n : inout std_logic_vector(9-1 downto 0);
hps_jtag_tck : in std_logic;
hps_jtag_tms : in std_logic;
hps_jtag_tdo : out std_logic;
hps_jtag_tdi : in std_logic;
hps_sdmmc_CCLK : out std_logic;
hps_sdmmc_CMD : inout std_logic;
hps_sdmmc_D0 : inout std_logic;
hps_sdmmc_D1 : inout std_logic;
hps_sdmmc_D2 : inout std_logic;
hps_sdmmc_D3 : inout std_logic;
hps_emac0_TX_CLK : out std_logic;
hps_emac0_RX_CLK : in std_logic;
hps_emac0_TX_CTL : out std_logic;
hps_emac0_RX_CTL : in std_logic;
hps_emac0_TXD0 : out std_logic;
hps_emac0_TXD1 : out std_logic;
hps_emac0_RXD0 : in std_logic;
hps_emac0_RXD1 : in std_logic;
hps_emac0_TXD2 : out std_logic;
hps_emac0_TXD3 : out std_logic;
hps_emac0_RXD2 : in std_logic;
hps_emac0_RXD3 : in std_logic;
hps_emac0_MDIO : inout std_logic;
hps_emac0_MDC : out std_logic;
hps_uart0_RX : in std_logic;
hps_uart0_TX : out std_logic;
hps_uart1_RX : in std_logic;
hps_uart1_TX : out std_logic;
hps_gpio1_io0 : inout std_logic;
hps_gpio1_io1 : inout std_logic;
hps_gpio1_io4 : inout std_logic;
hps_gpio1_io5 : inout std_logic;
hps_gpio1_io19 : inout std_logic;
hps_gpio1_io20 : inout std_logic;
hps_gpio1_io21 : inout std_logic;
hps_ref_clk : in std_logic
);

end entity;

component qsys_top is
port (
-- wd_reset_reset_n : out std_logic; -- reset_n
-- agilex_hps_f2h_stm_hw_events_stm_hwevents : in std_logic_vector(43 downto 0) := (others => 'X'); -- stm_hwevents
-- agilex_hps_h2f_cs_ntrst : in std_logic := 'X'; -- ntrst
-- agilex_hps_h2f_cs_tck : in std_logic := 'X'; -- tck
-- agilex_hps_h2f_cs_tdi : in std_logic := 'X'; -- tdi
-- agilex_hps_h2f_cs_tdo : out std_logic; -- tdo
-- agilex_hps_h2f_cs_tdoen : out std_logic; -- tdoen
-- agilex_hps_h2f_cs_tms : in std_logic := 'X'; -- tms
-- hps_io_EMAC0_TX_CLK : out std_logic; -- EMAC0_TX_CLK
-- hps_io_EMAC0_TXD0 : out std_logic; -- EMAC0_TXD0
-- hps_io_EMAC0_TXD1 : out std_logic; -- EMAC0_TXD1
-- hps_io_EMAC0_TXD2 : out std_logic; -- EMAC0_TXD2
-- hps_io_EMAC0_TXD3 : out std_logic; -- EMAC0_TXD3
-- hps_io_EMAC0_RX_CTL : in std_logic := 'X'; -- EMAC0_RX_CTL
-- hps_io_EMAC0_TX_CTL : out std_logic; -- EMAC0_TX_CTL
-- hps_io_EMAC0_RX_CLK : in std_logic := 'X'; -- EMAC0_RX_CLK
-- hps_io_EMAC0_RXD0 : in std_logic := 'X'; -- EMAC0_RXD0
-- hps_io_EMAC0_RXD1 : in std_logic := 'X'; -- EMAC0_RXD1
-- hps_io_EMAC0_RXD2 : in std_logic := 'X'; -- EMAC0_RXD2
-- hps_io_EMAC0_RXD3 : in std_logic := 'X'; -- EMAC0_RXD3
-- hps_io_EMAC0_MDIO : inout std_logic := 'X'; -- EMAC0_MDIO
-- hps_io_EMAC0_MDC : out std_logic; -- EMAC0_MDC
-- hps_io_SDMMC_CMD : inout std_logic := 'X'; -- SDMMC_CMD
-- hps_io_SDMMC_D0 : inout std_logic := 'X'; -- SDMMC_D0
-- hps_io_SDMMC_D1 : inout std_logic := 'X'; -- SDMMC_D1
-- hps_io_SDMMC_D2 : inout std_logic := 'X'; -- SDMMC_D2
-- hps_io_SDMMC_D3 : inout std_logic := 'X'; -- SDMMC_D3
-- hps_io_SDMMC_CCLK : out std_logic; -- SDMMC_CCLK
-- hps_io_UART0_RX : in std_logic := 'X'; -- UART0_RX
-- hps_io_UART0_TX : out std_logic; -- UART0_TX
-- hps_io_UART1_RX : in std_logic := 'X'; -- UART1_RX
-- hps_io_UART1_TX : out std_logic; -- UART1_TX
-- hps_io_gpio1_io0 : inout std_logic := 'X'; -- gpio1_io0
-- hps_io_gpio1_io1 : inout std_logic := 'X'; -- gpio1_io1
-- hps_io_gpio1_io4 : inout std_logic := 'X'; -- gpio1_io4
-- hps_io_gpio1_io5 : inout std_logic := 'X'; -- gpio1_io5
-- hps_io_jtag_tck : in std_logic := 'X'; -- jtag_tck
-- hps_io_jtag_tms : in std_logic := 'X'; -- jtag_tms
-- hps_io_jtag_tdo : out std_logic; -- jtag_tdo
-- hps_io_jtag_tdi : in std_logic := 'X'; -- jtag_tdi
-- hps_io_hps_osc_clk : in std_logic := 'X'; -- hps_osc_clk
-- hps_io_gpio1_io19 : inout std_logic := 'X'; -- gpio1_io19
-- hps_io_gpio1_io20 : inout std_logic := 'X'; -- gpio1_io20
-- hps_io_gpio1_io21 : inout std_logic := 'X'; -- gpio1_io21
-- h2f_reset_reset : out std_logic; -- reset
-- f2h_irq1_irq : in std_logic_vector(31 downto 0) := (others => 'X'); -- irq
clk_100_clk : in std_logic := 'X'; -- clk
-- emif_hps_pll_ref_clk_clk : in std_logic := 'X'; -- clk
-- emif_hps_oct_oct_rzqin : in std_logic := 'X'; -- oct_rzqin
-- emif_hps_mem_mem_ck : out std_logic_vector(0 downto 0); -- mem_ck
-- emif_hps_mem_mem_ck_n : out std_logic_vector(0 downto 0); -- mem_ck_n
-- emif_hps_mem_mem_a : out std_logic_vector(16 downto 0); -- mem_a
-- emif_hps_mem_mem_act_n : out std_logic_vector(0 downto 0); -- mem_act_n
-- emif_hps_mem_mem_ba : out std_logic_vector(1 downto 0); -- mem_ba
-- emif_hps_mem_mem_bg : out std_logic_vector(0 downto 0); -- mem_bg
-- emif_hps_mem_mem_cke : out std_logic_vector(0 downto 0); -- mem_cke
-- emif_hps_mem_mem_cs_n : out std_logic_vector(0 downto 0); -- mem_cs_n
-- emif_hps_mem_mem_odt : out std_logic_vector(0 downto 0); -- mem_odt
-- emif_hps_mem_mem_reset_n : out std_logic_vector(0 downto 0); -- mem_reset_n
-- emif_hps_mem_mem_par : out std_logic_vector(0 downto 0); -- mem_par
-- emif_hps_mem_mem_alert_n : in std_logic_vector(0 downto 0) := (others => 'X'); -- mem_alert_n
-- emif_hps_mem_mem_dqs : inout std_logic_vector(8 downto 0) := (others => 'X'); -- mem_dqs
-- emif_hps_mem_mem_dqs_n : inout std_logic_vector(8 downto 0) := (others => 'X'); -- mem_dqs_n
-- emif_hps_mem_mem_dq : inout std_logic_vector(71 downto 0) := (others => 'X'); -- mem_dq
-- emif_hps_mem_mem_dbi_n : inout std_logic_vector(8 downto 0) := (others => 'X'); -- mem_dbi_n
button_pio_external_connection_export : in std_logic_vector(3 downto 0) := (others => 'X'); -- export
dipsw_pio_external_connection_export : in std_logic_vector(3 downto 0) := (others => 'X'); -- export
led_pio_external_connection_in_port : in std_logic_vector(2 downto 0) := (others => 'X'); -- in_port
led_pio_external_connection_out_port : out std_logic_vector(2 downto 0); -- out_port
reset_reset_n : in std_logic := 'X'; -- reset_n
ninit_done_ninit_done : out std_logic -- ninit_done
);
end component qsys_top;

soc_inst : component qsys_top
port map (
-- wd_reset_reset_n => open, -- wd_reset.reset_n
-- agilex_hps_f2h_stm_hw_events_stm_hwevents => stm_hw_events, -- agilex_hps_f2h_stm_hw_events.stm_hwevents
-- agilex_hps_h2f_cs_ntrst => '1', -- agilex_hps_h2f_cs.ntrst
-- agilex_hps_h2f_cs_tck => '1', -- .tck
-- agilex_hps_h2f_cs_tdi => '1', -- .tdi
-- agilex_hps_h2f_cs_tdo => open, -- .tdo
-- agilex_hps_h2f_cs_tdoen => open, -- .tdoen
-- agilex_hps_h2f_cs_tms => '1', -- .tms
-- hps_io_EMAC0_TX_CLK => hps_emac0_TX_CLK, -- hps_io.EMAC0_TX_CLK
-- hps_io_EMAC0_TXD0 => hps_emac0_TXD0, -- .EMAC0_TXD0
-- hps_io_EMAC0_TXD1 => hps_emac0_TXD1, -- .EMAC0_TXD1
-- hps_io_EMAC0_TXD2 => hps_emac0_TXD2, -- .EMAC0_TXD2
-- hps_io_EMAC0_TXD3 => hps_emac0_TXD3, -- .EMAC0_TXD3
-- hps_io_EMAC0_RX_CTL => hps_emac0_RX_CTL, -- .EMAC0_RX_CTL
-- hps_io_EMAC0_TX_CTL => hps_emac0_TX_CTL, -- .EMAC0_TX_CTL
-- hps_io_EMAC0_RX_CLK => hps_emac0_RX_CLK, -- .EMAC0_RX_CLK
-- hps_io_EMAC0_RXD0 => hps_emac0_RXD0, -- .EMAC0_RXD0
-- hps_io_EMAC0_RXD1 => hps_emac0_RXD1, -- .EMAC0_RXD1
-- hps_io_EMAC0_RXD2 => hps_emac0_RXD2, -- .EMAC0_RXD2
-- hps_io_EMAC0_RXD3 => hps_emac0_RXD3, -- .EMAC0_RXD3
-- hps_io_EMAC0_MDIO => hps_emac0_MDIO, -- .EMAC0_MDIO
-- hps_io_EMAC0_MDC => hps_emac0_MDC, -- .EMAC0_MDC
-- hps_io_SDMMC_CMD => hps_sdmmc_CMD, -- .SDMMC_CMD
-- hps_io_SDMMC_D0 => hps_sdmmc_D0, -- .SDMMC_D0
-- hps_io_SDMMC_D1 => hps_sdmmc_D1, -- .SDMMC_D1
-- hps_io_SDMMC_D2 => hps_sdmmc_D2, -- .SDMMC_D2
-- hps_io_SDMMC_D3 => hps_sdmmc_D3, -- .SDMMC_D3
-- hps_io_SDMMC_CCLK => hps_sdmmc_CCLK, -- .SDMMC_CCLK
-- hps_io_UART0_RX => hps_uart0_RX, -- .UART0_RX
-- hps_io_UART0_TX => hps_uart0_TX, -- .UART0_TX
-- hps_io_UART1_RX => hps_uart1_RX, -- .UART1_RX
-- hps_io_UART1_TX => hps_uart1_TX, -- .UART1_TX
-- hps_io_gpio1_io0 => hps_gpio1_io0, -- .gpio1_io0
-- hps_io_gpio1_io1 => hps_gpio1_io1, -- .gpio1_io1
-- hps_io_gpio1_io4 => hps_gpio1_io4, -- .gpio1_io4
-- hps_io_gpio1_io5 => hps_gpio1_io5, -- .gpio1_io5
-- hps_io_jtag_tck => hps_jtag_tck, -- .jtag_tck
-- hps_io_jtag_tms => hps_jtag_tms, -- .jtag_tms
-- hps_io_jtag_tdo => hps_jtag_tdo, -- .jtag_tdo
-- hps_io_jtag_tdi => hps_jtag_tdi, -- .jtag_tdi
-- hps_io_hps_osc_clk => hps_ref_clk, -- .hps_osc_clk
-- hps_io_gpio1_io19 => hps_gpio1_io19, -- .gpio1_io19
-- hps_io_gpio1_io20 => hps_gpio1_io20, -- .gpio1_io20
-- hps_io_gpio1_io21 => hps_gpio1_io21, -- .gpio1_io21
-- h2f_reset_reset => h2f_reset, -- h2f_reset.reset
-- f2h_irq1_irq => f2h_irq1_irq, -- f2h_irq1.irq
clk_100_clk => system_clk_100_internal, -- clk_100.clk
-- emif_hps_pll_ref_clk_clk => emif_hps_pll_ref_clk, -- emif_hps_pll_ref_clk.clk
-- emif_hps_oct_oct_rzqin => emif_hps_oct_oct_rzqin, -- emif_hps_oct.oct_rzqin
-- emif_hps_mem_mem_ck => emif_hps_mem_mem_ck, -- emif_hps_mem.mem_ck
-- emif_hps_mem_mem_ck_n => emif_hps_mem_mem_ck_n, -- .mem_ck_n
-- emif_hps_mem_mem_a => emif_hps_mem_mem_a, -- .mem_a
-- emif_hps_mem_mem_act_n => emif_hps_mem_mem_act_n, -- .mem_act_n
-- emif_hps_mem_mem_ba => emif_hps_mem_mem_ba, -- .mem_ba
-- emif_hps_mem_mem_bg => emif_hps_mem_mem_bg, -- .mem_bg
-- emif_hps_mem_mem_cke => emif_hps_mem_mem_cke, -- .mem_cke
-- emif_hps_mem_mem_cs_n => emif_hps_mem_mem_cs_n, -- .mem_cs_n
-- emif_hps_mem_mem_odt => emif_hps_mem_mem_odt, -- .mem_odt
-- emif_hps_mem_mem_reset_n => emif_hps_mem_mem_reset_n, -- .mem_reset_n
-- emif_hps_mem_mem_par => emif_hps_mem_mem_par, -- .mem_par
-- emif_hps_mem_mem_alert_n => emif_hps_mem_mem_alert_n, -- .mem_alert_n
-- emif_hps_mem_mem_dqs => emif_hps_mem_mem_dqs, -- .mem_dqs
-- emif_hps_mem_mem_dqs_n => emif_hps_mem_mem_dqs_n, -- .mem_dqs_n
-- emif_hps_mem_mem_dq => emif_hps_mem_mem_dq, -- .mem_dq
-- emif_hps_mem_mem_dbi_n => emif_hps_mem_mem_dbi_n, -- .mem_dbi_n
button_pio_external_connection_export => fpga_debounced_buttons, -- button_pio_external_connection.export
dipsw_pio_external_connection_export => fpga_dipsw_pio, -- dipsw_pio_external_connection.export
led_pio_external_connection_in_port => fpga_led_internal, -- led_pio_external_connection.in_port
led_pio_external_connection_out_port => fpga_led_internal, -- .out_port
reset_reset_n => (system_reset_n AND FPGA_TESTIO1), -- reset.reset_n
ninit_done_ninit_done => ninit_done -- ninit_done.ninit_done
);

Then at the end of the compilation, I got this errors,

Error(17045): Input port I of I/O input buffer primitive soc_inst|emif_fm_hps_0|emif_fm_hps_0|arch|arch_inst|bufs_inst|gen_rzqin.ibuf is not connected. It must be driven by a top-level pin.

What is that, actually? Could you please help me on this?

By the way, can some expert from Altera / Intel please provide some example working project that can be built and loaded into the board?

Please help..

Regards
nelky
Occasional Contributor
2 years ago
Can some experts please help on the sample Quartus project DDR4 with Agilex 7?
Regards
sstrell
Super Contributor
2 years ago
Are you using a dev kit or a custom board? If it's a dev kit, you can select the board when creating the Quartus project and then generate the example design from the EMIF IP parameter editor. A GHRD project is for a particular device and dev kit, so if you are having issues with it, then you must not be using that dev kit. If you are not using a dev kit and this is your own custom board, you can (and should) still create an example design and use that for testing. You would still need to set location assignments for the I/O, but you can use Interface Planner for that or follow the guidelines in the IP user guide to manually create the assignments. This is all shown in the training I linked you to.
FYI: Rzq is for the OCT (on-chip termination) calibration so that must be connected to an Rzq pin with a resistor attached. Again, all documented in the IP user guide.
nelky
Occasional Contributor
2 years ago
Hi sstrell,
Thanks for coming back to me.
I have gone through the links you provided long before I decided to post my question here.
I am not sure. But if you think the links you provided is able to help, why not you try them and make a working project and load into the Agilex 7 board you have and see if you can read write on DDR4 through your Linux application program. Say we write 500MB of data to the DDR4 and read back. It has to go through the bridges you have created using the EMIF in the documents in the links you provided.
Could you please try that?
Regards,
- sstrell
  Super Contributor
  2 years ago
  I don't have the hardware for this. I'm going by my experience with the IP and tools and implementation of EMIF on other devices. And I run in Windows, not Linux. You still don't mention if this is a dev kit or your own custom board.
  - nelky
    Occasional Contributor
    2 years ago
    Hi sstrell,
    I am using the board designed based on a development kit.
    To quote you...
    "If it's a dev kit, you can select the board when creating the Quartus project and then generate the example design from the EMIF IP parameter editor."
    "If you are not using a dev kit and this is your own custom board, you can (and should) still create an example design and use that for testing."
    Whether or not it is dev kit, does it matter? Still we need to create example design, right?
    Do the documents, that say creating example from the EMIF IP, work?
    My thinking is that if the documents says it is working, there should be some sample project that can support and show it is working. Instead, we need to read all the documents and test it and to tell if the documents are valid, working theoretically. But I think, theoretically, it is working. Practically, something is missing, causing it doesn't work.
    Am I right to say that?
    Frankly, I have tried almost all documents and video clips, be it DDR4, EMIF, etc. Yet, none works... It is either failing at the generate part at the Platform Designer or at the compilation part at Quartus Prime Pro. In short, it all fails...
    Sigh...I may have overlooked something. That's why I need some experts here to guide me.
    The requirement here sounds simple, Bringing up the internal bridges in Agilex 7 so that at the Linux application side, it can read from and write to the DDR4.
    But when implementing it, it's not that simple.
    It's quite funny when I asked people around me. They either know the FPGA part or the SoC part. None knows both combination. Some suggested using UART or SPI to access to the DDR4. But it's slower. It doesn't make sense since the internal bridges are there. We need to bring up the internal bridges to access to the DDR4. It is faster, right? But how to bring up the internal bridges to achieve this?
    I even thought of writing my own AXI4 signals to access to the DDR4. But there are 2 obstacles here.
    One is how to write the AXI4 signals itself, for sure.
    The second one is that even this can be achieved, at the Linux side, it will have problem accessing it since there is no memory-mapped addresses to access the DDR4, like the one generated by Avalon-mm.
    Could someone please help?
    Regards,
    Regards,
nelky
Occasional Contributor
2 years ago
It fails with this error message when I tried to generate
HPS_OSC_CLK input is required to drive the main PLL. But the pin has not been specified in the HPS I/O selection.
Sorry, it's actually a warning. It matters also, right?
I am using Quartus Prime Pro 22.1.0 Build 174 03/03/2022 SC Pro Edition.
Platform Designer 22.1 Build 174.
Do you want me to PM you my Quartus projects?
- sstrell
  Super Contributor
  2 years ago
  Like I said, you need to create an example design without the HPS and establish that your EMIF works. That warning means you are still trying to create the example design from the HPS EMIF IP, not the standalone EMIF IP.
  But yes since it's just a warning, it's not an issue for now.
  - nelky
    Occasional Contributor
    2 years ago
    Hi sstrell,
    OK.
    I recreate again based on the attached document.
    By the way. I asked the hardware engineer, he told me their design is based on Intel Agilex 7 FPGA F-series transceiver-SoC Development kit.
    Does that ring any bell to you?
    Regards,
    ug-ag-emideug-683162-773463.pdf1.8 MB
tehjingy_Altera
Regular Contributor
2 years ago
Hi
You could luanch the emif debug toolkit from the quartus tool.
Seen below:
Regards
Jingyang, Teh
- nelky
  Occasional Contributor
  2 years ago
  Hi Jingyang,
  Thanks for coming back.
  Before I posted, I have tried the method you suggested. It can't be used since I am using Agilex, not Stratix, Arria or Cyclone. Please refer to the attached image for the error.
  I have to use the System Console. But it was stuck and don't know how to proceed (you can see the attached image). I did mention about this in my previous post.
  Regards
tehjingy_Altera
Regular Contributor
2 years ago
Hi

Just updating the case for the SystemConsole launching the EMIF Tool kit

Please refer to the link on adding the EMIF toolkit to the project.
https://www.intel.com/content/www/us/en/docs/programmable/683216/23-2-2-7-1/generating-a-design-example-with-the.html
After adding it to the project you could launch using the method:
11.7.3. Launching the EMIF Debug Toolkit (intel.com)

Regards
Jingyang, Teh