Merge pull request #1454 from YosysHQ/mmicko/common_tests

Share common tests

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/arch/ice40/dpram.v b/tests/arch/ice40/dpram.v
new file mode 100644
index 000000000..3ea4c1f27
--- /dev/null
+++ b/tests/arch/ice40/dpram.v
@@ -0,0 +1,23 @@
+/*
+Example from: https://www.latticesemi.com/-/media/LatticeSemi/Documents/UserManuals/EI/iCEcube201701UserGuide.ashx?document_id=52071 [p. 72].
+*/
+module top (din, write_en, waddr, wclk, raddr, rclk, dout);
+parameter addr_width = 8;
+parameter data_width = 8;
+input [addr_width-1:0] waddr, raddr;
+input [data_width-1:0] din;
+input write_en, wclk, rclk;
+output [data_width-1:0] dout;
+reg [data_width-1:0] dout;
+reg [data_width-1:0] mem [(1<<addr_width)-1:0]
+/* synthesis syn_ramstyle = "no_rw_check" */ ;
+always @(posedge wclk) // Write memory.
+begin
+if (write_en)
+mem[waddr] <= din; // Using write address bus.
+end
+always @(posedge rclk) // Read memory.
+begin
+dout <= mem[raddr]; // Using read address bus.
+end
+endmodule