[Commit-gnuradio] r8927 - usrp2/trunk/fpga/top/u2_rev3

[matt]

Author: matt
Date: 2008-07-17 15:07:52 -0600 (Thu, 17 Jul 2008)
New Revision: 8927

Modified:
   usrp2/trunk/fpga/top/u2_rev3/u2_rev3.v
Log:
run the watchdog timer on the rev3


Modified: usrp2/trunk/fpga/top/u2_rev3/u2_rev3.v
===================================================================
--- usrp2/trunk/fpga/top/u2_rev3/u2_rev3.v      2008-07-17 20:45:56 UTC (rev 
8926)
+++ usrp2/trunk/fpga/top/u2_rev3/u2_rev3.v      2008-07-17 21:07:52 UTC (rev 
8927)
@@ -155,13 +155,20 @@
    inout [15:0] io_rx   
    );
 
-   assign      WDI = 0;
-   
    assign      cpld_init_b = 0;
    // FPGA-specific pins connections
    wire        clk_fpga, dsp_clk, clk_div, dcm_out, wb_clk, clock_ready;
    wire        clk90, clk180, clk270;
 
+   // reset the watchdog continuously
+   reg [15:0]  wd;
+   always @(posedge wb_clk)
+     if(POR)
+       wd <= 0;
+     else
+       wd <= wd + 1;
+   assign      WDI = wd[15];
+   
    IBUFGDS clk_fpga_pin (.O(clk_fpga),.I(clk_fpga_p),.IB(clk_fpga_n));
    defparam    clk_fpga_pin.IOSTANDARD = "LVPECL_25";