From d29b517fef05973dda3c556a95fbfb478d6e7e50 Mon Sep 17 00:00:00 2001 From: David Shah Date: Thu, 18 Oct 2018 19:40:02 +0100 Subject: [PATCH] ecp5: Sim model fixes Signed-off-by: David Shah --- techlibs/ecp5/cells_sim.v | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/techlibs/ecp5/cells_sim.v b/techlibs/ecp5/cells_sim.v index e43632c64..6e4b0a5ac 100644 --- a/techlibs/ecp5/cells_sim.v +++ b/techlibs/ecp5/cells_sim.v @@ -265,16 +265,18 @@ module TRELLIS_IO( output O ); parameter DIR = "INPUT"; + reg T_pd; + always @(*) if (T === 1'bz) T_pd <= 1'b0; else T_pd <= T; generate if (DIR == "INPUT") begin assign B = 1'bz; assign O = B; end else if (DIR == "OUTPUT") begin - assign B = T ? 1'bz : I; + assign B = T_pd ? 1'bz : I; assign O = 1'bx; - end else if (DIR == "INOUT") begin - assign B = T ? 1'bz : I; + end else if (DIR == "BIDIR") begin + assign B = T_pd ? 1'bz : I; assign O = B; end else begin ERROR_UNKNOWN_IO_MODE error(); -- 2.30.2