hardware control of leds

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9961 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/usrp2/fpga/top/u2_core/u2_core.v b/usrp2/fpga/top/u2_core/u2_core.v
index 33daf8251bbebd76037ee3b9633cb6029fe305e6..b12a7eacad551e5070924a934b830d62be832574 100755 (executable)
--- a/usrp2/fpga/top/u2_core/u2_core.v
+++ b/usrp2/fpga/top/u2_core/u2_core.v
@@ -427,11 +427,25 @@ module u2_core
                                      .in(set_data),.out(serdes_outs),.changed());
    setting_reg #(.my_addr(2)) sr_adc (.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
                                      .in(set_data),.out(adc_outs),.changed());
-   setting_reg #(.my_addr(3)) sr_led (.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
-                                     .in(set_data),.out(leds),.changed());
    setting_reg #(.my_addr(4)) sr_phy (.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
                                      .in(set_data),.out(phy_reset),.changed());
 
+   // /////////////////////////////////////////////////////////////////////////
+   //  LEDS
+   //    register 8 determines whether leds are controlled by SW or not
+   //    1 = controlled by HW, 0 = by SW
+   //    In Rev3 there are only 6 leds, and the highest one is on the ETH connector
+   
+   wire [7:0]   led_src, led_sw;
+   wire [7:0]   led_hw = {pps_in,clk_status,serdes_link_up};
+   
+   setting_reg #(.my_addr(3)) sr_led (.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
+                                     .in(set_data),.out(led_sw),.changed());
+   setting_reg #(.my_addr(8)) sr_led_src (.clk(wb_clk),.rst(wb_rst),.strobe(set_stb),.addr(set_addr),
+                                         .in(set_data),.out(led_src),.changed());
+
+   assign       leds = (led_src & led_hw) | (~led_src & led_sw);
+   
    // /////////////////////////////////////////////////////////////////////////
    // Ethernet MAC  Slave #6