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nextpnr/ecp5/docs/primitives.md
Gary Wong 8cc6a2fae5 Remove comment about the USRMCLK primitive being untested. 
Tested and verified working: the trivial configuration:

    module USRMCLK( USRMCLKI, USRMCLKTS );
        input USRMCLKI, USRMCLKTS;
    endmodule

    module top( input clk );
        reg[ 24:0 ] count = 0;

        always @( posedge clk ) begin
            count <= count + 1'b1;
        end

        USRMCLK mspi( .USRMCLKI( count[ 20 ] ), .USRMCLKTS( count[ 24 ] ) );
    endmodule

produces the expected output (toggling at high frequency, toggling
tri-state at lower frequency) on an LFE5U-85 when fed with an appropriate
clock.  See https://bayimg.com/AAnNKAAGO for an example.  The top
(magenta) trace is the MCLK line.
2020-04-02 21:35:35 -06:00

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nextpnr-ecp5 Primitive Support List

nextpnr-ecp5 currently supports the following primitives:

  • ALU54B (limited support, must be manually placed)
  • CCU2C
  • CLKDIVF
  • DCUA
  • DDRDLLA
  • DELAYF
  • DELAYG
  • DP16KD
  • DQSBUFM
  • DTR
  • ECLKSYNCB
  • EHXPLLL
  • EXTREFB
  • GSR
  • IDDR71B
  • IDDRX1F
  • IDDRX2DQA
  • IDDRX2F
  • IOLOGIC
  • JTAGG (untested)
  • L6MUX21
  • LUT4
  • MULT18X18D (cascade functionality not supported)
  • ODDR71B
  • ODDRX1F
  • ODDRX2DQA
  • ODDRX2DQSB
  • ODDRX2F
  • OSCG
  • OSHX2A
  • PCSCLKDIV
  • PFUMX
  • SEDGA (untested)
  • SIOLOGIC
  • TRELLIS_DPR16X4
  • TRELLIS_ECLKBUF
  • TRELLIS_FF
  • TRELLIS_IO
  • TRELLIS_SLICE
  • TSHX2DQA
  • TSHX2DQSA
  • USRMCLK