eflyzhao

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  1. I found it at the link below. https://www.mouser.co.uk/new/digilent/digilent-cora-z7-development-tool/ I will try the SD card method. Thank you very much.
  2. Hi, I want to program the quad-spi flash on Cora Z7 board with my FPGA and SDK designs. But I couldn't find the detail on the flash memory chip. Could you please provide me the instruction on how to program this flash memory? Thank you. "16MB Quad-SPI flash with factory programmed 128-bit random number"
  3. This problem was solved by adding some brackets around the summing terms.
  4. The code below is from the textbook "Digital Design Using Digilent FPGA Boards Active -HDL Edition by Haskell & Hanna" on page 151. The input variable "x" is multiplied by decimal value "100" (7-bit). The results will be assigned to output variable "p". library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_unsigned.ALL; entity mult100 is Port ( x : in STD_LOGIC_VECTOR(8 downto 0); --9 bit p : out STD_LOGIC_VECTOR(15 downto 0)); --16 bit end mult100; architecture Behavioral of mult100 is begin p <= '0' & x & "000000" --shift 6 bit left, line 48 + "00" & x & "00000" --shift 5 bit left + "00000" & x & "00";--shift 2 bit left end Behavioral; The error shown in ISE 13.2 is "Line 48: Expression has 41 elements ; expected 16 Netlist mult100(Behavioral) remains a blackbox, due to errors in its contents" I found this issue can be solved by declaring three signals, "a", "b", and "c" and implemening the multiplier as follow. But I don't know why the original code doesn't work. Thank you. a <= '0' & x & "000000"; b <= "00" & x & "00000"; c <= "00000" & x & "00"; p <= a+b+c;