Added GP_RCOSC cell

diff --git a/techlibs/greenpak4/cells_sim.v b/techlibs/greenpak4/cells_sim.v
index 1234ce1b26476c6257dff39925a21a65e4199731..800fe3ab5238c02be6b6e7bb2d8bc749c6ab373c 100644 (file)
--- a/techlibs/greenpak4/cells_sim.v
+++ b/techlibs/greenpak4/cells_sim.v
@@ -118,6 +118,44 @@ module GP_RINGOSC(input PWRDN, output reg CLKOUT_PREDIV, output reg CLKOUT_FABRI
        
 endmodule
 
+module GP_RCOSC(input PWRDN, output reg CLKOUT_PREDIV, output reg CLKOUT_FABRIC);
+       
+       parameter PWRDN_EN = 0;
+       parameter AUTO_PWRDN = 0;
+       parameter PRE_DIV = 1;
+       parameter FABRIC_DIV = 1;
+       parameter OSC_FREQ = "25k"
+       
+       initial CLKOUT_PREDIV = 0;
+       initial CLKOUT_FABRIC = 0;
+       
+       //output dividers not implemented for simulation
+       //auto powerdown not implemented for simulation
+       
+       always begin
+               if(PWRDN) begin
+                       CLKOUT_PREDIV = 0;
+                       CLKOUT_FABRIC = 0;
+               end
+               else begin
+               
+                       if(OSC_FREQ == "25k") begin
+                               //half period of 25 kHz
+                               #20000;
+                       end
+                       
+                       else begin
+                               //half period of 2 MHz
+                               #250;
+                       end
+                       
+                       CLKOUT_PREDIV = ~CLKOUT_PREDIV;
+                       CLKOUT_FABRIC = ~CLKOUT_FABRIC;
+               end
+       end
+       
+endmodule
+
 module GP_COUNT8(input CLK, input wire RST, output reg OUT);
 
        parameter RESET_MODE    = "RISING";