Merge pull request #851 from kprasadvnsi/master

Added examples/anlogic/

examples/anlogic/.gitignore

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+demo.bit
+demo_phy.area
+full.v
+*.log

examples/anlogic/README

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+LED Blink project for Anlogic Lichee Tang board.
+
+Follow the install instructions for the Tang Dynasty IDE from given link below.
+
+https://tang.sipeed.com/en/getting-started/installing-td-ide/linux/
+
+
+set TD_HOME env variable to the full path to the TD <TD Install Directory> as follow.
+
+export TD_HOME=<TD Install Directory>
+
+then run "bash build.sh" in this directory.
+

examples/anlogic/build.sh

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+#!/bin/bash
+set -ex
+yosys demo.ys
+$TD_HOME/bin/td build.tcl

examples/anlogic/build.tcl

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+import_device eagle_s20.db -package BG256
+read_verilog full.v -top demo
+read_adc demo.adc
+optimize_rtl
+map_macro
+map
+pack
+place
+route
+report_area -io_info -file demo_phy.area
+bitgen -bit demo.bit -version 0X00 -g ucode:00000000000000000000000000000000

examples/anlogic/demo.adc

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+set_pin_assignment {CLK_IN} { LOCATION = K14;  } ##24MHZ
+set_pin_assignment {R_LED} { LOCATION = R3;  } ##R_LED

examples/anlogic/demo.v

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+module demo (
+    input wire CLK_IN,  
+    output wire R_LED 
+);
+    parameter time1 = 30'd12_000_000;
+    reg led_state;
+    reg [29:0] count;
+    
+    always @(posedge CLK_IN)begin
+        if(count == time1)begin
+            count<= 30'd0; 	
+            led_state <= ~led_state;
+        end
+        else
+            count <= count + 1'b1;
+    end
+    assign R_LED = led_state;
+endmodule

examples/anlogic/demo.ys

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+read_verilog demo.v
+synth_anlogic -top demo
+write_verilog full.v