#==============================================================================#
# Pin constraints of Spartan-II Demo Board made by Insight                     #
#==============================================================================#

#==============================================================================#
# Clock & Reset                                                                #
#==============================================================================#
# I have measured clock frequency 40.38 MHz
# Oscilator chip DS1073 is shipped from the factory configured for half the 
# maximum operating frequency. And can be reconfigured using 1-wire protocol in
# the range of approximately 30kHz to 1000MHz.

NET "clk"             LOC = "P80" |   PERIOD = 24 ns;
NET "reset"           LOC = "P206";

#==============================================================================#
# LCD display                                                                  #
#==============================================================================#

NET "lcd_com"         LOC = "P174";

NET "lcd2<0>"         LOC = "P168";
NET "lcd2<1>"         LOC = "P166";
NET "lcd2<2>"         LOC = "P165";
NET "lcd2<3>"         LOC = "P163";
NET "lcd2<4>"         LOC = "P162";
NET "lcd2<5>"         LOC = "P172";
NET "lcd2<6>"         LOC = "P173";
NET "lcd2_dp"         LOC = "P161";

NET "lcd1<0>"         LOC = "P187";
NET "lcd1<1>"         LOC = "P181";
NET "lcd1<2>"         LOC = "P180";
NET "lcd1<3>"         LOC = "P179";
NET "lcd1<4>"         LOC = "P176";
NET "lcd1<5>"         LOC = "P188";
NET "lcd1<6>"         LOC = "P191";
NET "lcd1_dp"         LOC = "P175";

#==============================================================================#
# RS-232 communication port                                                    #
#==============================================================================#
# TXD is input to the board.
# RXD is output from the board.

NET "txd"             LOC = "P193";
NET "rxd"             LOC = "P194";

#==============================================================================#
# LEDs                                                                         #
#==============================================================================#
# All LEDs are low active.

NET "led4"            LOC = "P195";
NET "led5"            LOC = "P199";
NET "led6"            LOC = "P201";

#==============================================================================#
# DIP switches                                                                 #
#==============================================================================#
# All switches are low active.

NET "sw1"             LOC = "P202";
NET "sw2"             LOC = "P204";
NET "sw3"             LOC = "P205";
NET "sw4"             LOC = "P206";


#==============================================================================#
# Other connected devices                                                      #
#==============================================================================#

#Rotary encoder connect to the header JP1.
# rot_feed  - JP1.1 - log. 1 "feeding" quadratic encoder
# rot_A     - JP1.3
# rot_B     - JP1.5
# rot_press - JPJ.7 - quadratic encoder has also function of button

NET "rot_feed"        LOC = "P3";
NET "rot_A"           LOC = "P5" |    PULLDOWN;
NET "rot_B"           LOC = "P7" |    PULLDOWN; 
NET "rot_press"       LOC = "P9" |    PULLDOWN;