# RS-232 Port #
#==============================================================================#
-NET "RXD" LOC = "A7"; # input to RS232 driver
-NET "TXD" LOC = "B7"; # output from RS232 driver
+NET "TXD" LOC = "A7"; # output from the board (from FPGA)
+NET "RXD" LOC = "B7"; # input to the board (to FPGA)
+
+#==============================================================================#
+# Incremental rotary encoder #
+#==============================================================================#
+# Connected to the header J4.
+
+NET "ROT_FEED" LOC = "H2"; # pin 01
+NET "ROT_A" LOC = "J2" | PULLDOWN; # pin 03
+NET "ROT_B" LOC = "K2" | PULLDOWN; # pin 05
+NET "ROT_PRESS" LOC = "E4" | PULLDOWN; # pin 07
+
+#==============================================================================#
+# PWM output #
+#==============================================================================#
+# Connected to the header J7 (LVDS TX STATUS).
+
+NET "PWM" LOC = "C1"; # pin 01