Tcl Script: I/O Assignment Tcl Script Example

This Tcl script example opens the project counter.quartus, adds I/O cell assignments to the project, and compiles the design.

Perform the following steps to run the Tcl script:

1. Download the design files (counter2.exe), which includes this Tcl script.

   The Tcl script will not work without these design files.

2. Open the Quartus^TM software.
3. Choose Auxiliary Windows then the Tcl/Tk Console (View menu) to open Tcl console.
4. Change to the directory where assignio.tcl and design files are located using the cd <workdir> command. For example, c:/quartus/designs/counter2.
5. Run the Tcl script using the source assignio.tcl command.

I/O Assignment Script

# opens the project
project open counter

# sets the compilation focus
project set_active_cmp counter

# adds device assignments
cmp add_assignment "" "" "" FAMILY APEX20KE
cmp add_assignment counter "" "" DEVICE EP20K100ETC144-1

# adds pin assignments
cmp add_assignment counter "" |clk LOCATION Pin_95
cmp add_assignment counter "" |aclr LOCATION Pin_127
cmp add_assignment counter "" |cout LOCATION Pin_104
cmp add_assignment counter "" |q\[0\] LOCATION Pin_109
cmp add_assignment counter "" |q\[1\] LOCATION Pin_110
cmp add_assignment counter "" |q\[2\] LOCATION Pin_111
cmp add_assignment counter "" |q\[3\] LOCATION Pin_112

# adds an IO standards for input/output ports
cmp add_assignment counter "" "" DEVICE_IO_STANDARD LVCMOS
cmp add_assignment counter "" |cout IO_STANDARD CTT

# adds a vref pin for the CTT IO standard
cmp add_assignment counter "" vref LOCATION Pin_8
cmp add_assignment counter "" vref RESERVE_PIN "AS VREF"
cmp add_assignment counter "" vref IO_STANDARD CTT

# starts compilation and print out messages
cmp start

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