Add demo with RGB LED

machxo2/examples/demorgb.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if [ ! -z ${TRELLIS_DB+x} ]; then
+    DB_ARG="--db $TRELLIS_DB"
+fi
+
+${YOSYS:-yosys} -p 'synth_machxo2 -json rgbcount.json' rgbcount.v
+${NEXTPNR:-../../nextpnr-machxo2} --1200 --package QFN32 --no-iobs --json rgbcount.json --textcfg rgbcount.txt
+ecppack --compress $DB_ARG rgbcount.txt rgbcount.bit
+tinyproga -b rgbcount.bit

machxo2/examples/rgbcount.v

@@ -0,0 +1,33 @@
+// Modified from:
+// https://github.com/tinyfpga/TinyFPGA-A-Series/tree/master/template_a2
+// https://tinyfpga.com/a-series-guide.html used as a basis.
+
+module TinyFPGA_A2 (
+  (* LOC="21" *)
+  inout pin6,
+  (* LOC="26" *)
+  inout pin9_jtgnb,
+  (* LOC="27" *)
+  inout pin10_sda,
+);
+  wire clk;
+  
+  OSCH #(
+    .NOM_FREQ("2.08")
+  ) internal_oscillator_inst (
+    .STDBY(1'b0), 
+    .OSC(clk)
+  ); 
+  
+  reg [23:0] led_timer;
+  
+  always @(posedge clk) begin
+    led_timer <= led_timer + 1; 
+  end
+  
+  // left side of board
+  assign pin9_jtgnb = led_timer[23];
+  assign pin10_sda = led_timer[22];
+  assign pin6 = led_timer[21];
+
+endmodule