1. What you will learn
1.2 How to set design parameters (such as manufacturer and package type) in PLDS II.
1.3 How to generate a fuse map file for the schematic and parameters selected.
1.4 How to redraw the schematic in DA using the PAL.
1.5 How to set the PAL fuse map reference file.
1.6 How to change the pinout of the PAL by altering the ".pi" file.
1.7 How to FTP a file from the UNIX lab to a PC.
1.8 How to program a PAL using the BP1400.
The logic design to be mapped into a PAL with PLDS II is created by developing a schematic of the logic using parts from the Mentor gen_lib library. This schematic is then exported to the PLDS II tools. Note that the schematic can be developed by hand in Design Architect or synthesized to gen_lib parts from a VHDL model using the Mentor Graphics Autologic synthesis tool.
2.2 Open up a new sheet for this design and call it pal1.
Construct the schematic shown below using only gen_lib parts:
2.3 Check and save the sheet.
2.4 Create a symbol like the one below using the Miscellaneous->Generate Symbol menu item.
2.5 Check and save the symbol. Close the symbol window. Leave the DA
and the pal1 schematic open.
3.2 Open Quicksim:
3.3 Run the dofile by typing "dofile pal1.do" in the session window.
The resulting timing diagram should look like the one below:
3.4 Exit Quicksim.
4.1 Back in DA, make the schematic window active and select File->Export to PLDS II. After a moment, a PLDS II window similar to the one shown below will appear.
4.3 Select the Device->Parameters->Contraints menu item in the PLDS II window. The prompt box shown below will appear.
4.4 Under LOGIC FAMILY select CMOS. For MANUFACTURER select AMD. Under DEVICE PACKAGE select DIP. Finally, for TEMPERATURE RANGE select COM (commercial.) Click OK.
4.5 Select the Device->Parameters->Templates menu item. The prompt box shown below will appear.
4.6 In this box, click the none button to unselect anything that may be selected. Next, select P22V10. Click OK.
4.7 In the PLDS II window, select the Device->Solutions->Generate New Solutions menu item and the prompt box shown below will appear. Click OK.
4.8 Finally, in the PLDS II window, select the Device->Device Mapping menu item and the prompt box shown below will appear. Click Generate Fusemaps and then Exit.
4.9 Note that if you select the View->Documentation menu item in the PLDS II window, you will see info about the programmed PAL, including a pinout which should look like the one below:
4.10 Click OK in the documentation window and use the File->Exit
menu item to exit PLDS II.
Once you have generated a JEDEC fuse file for the PAL, you can simulate it in a 22V10 model in your original system model to ensure that the PAL will perform as expected in the real system. This is done using a 22V10 model available within the Mentor Graphics library and setting it up so that it loads the JEDEC file you generated in PLDS II.
5.2 Get a 22V10 component by opening the Board Process library using the Libraries->MGC Board Process Libraries menu item and selecting the PLD option from the MGC BPL Libraries sidebar menu. Click once on the 22V10_10 option in the dialog box that appears. Click the Refine Component button. In the Symbol item, select GRAY_BOX. In the Package item, select DIP24_P. Click OK and place the symbol on the schematic.
5.4 The filename located below the symbol must be changed. This filename must be the pal1.j1 file (called a "JEDEC" file) created when you generated the fusemap in the PLDS II window. This file is located in the "minc" directory created by PLDS II under the directory you created earlier in the tutorial (e.g:students/<your_id>/egre427tut/minc/pal1.j1) To change this filename, simply position the mouse pointer over the filename that appears just below and to the left of the PAL symbol on the schematic and press <Shift-F7>. In the box that appears, write in the complete directory for the filename.
5.4 Check and save the schematic.
>> quicksim pal2 &
6.2 Open sheet and run the simulation by typing "dofile pal1.do" in the session window. The resulting trace window should look the same as that for the pal1 schematic.
6.3 Exit Quicksim.
NOTE: If you are using this tutorial only to generate a fusemap file for the "Test Board," do not do this part of the tutorial unless afterwards you change the pal1.pi back to its original form and regenerate the original JEDEC file . The PAL socket on the test board is wired for the original PAL pinout.
7.1 The PLDS II tool automatically assigns the location of the pins on the PAL device, but sometimes it is desirable to assign the pin locations yourself. In order to do so, the pal1.pi file must be edited.
7.2 Open a text editor, and open the pal1.npi file (not the pal1.pi file). This file is located in the "minc" directory along with the JEDEC file created above. (For example: /students/<your_id>/egre427/tut/pal1/minc/pal1.npi) The file will look similar to the one below.
7.3 The section of the file we are interested in is between the "DEVICE" and "END DEVICE;" labels. To change which pins to assign inputs and outputs to, this part of the file will be altered. Change the line reading INPUT RESET:2; "2 to INPUT RESET:4; "4. This will move the RESET input from pin 2 to pin 4. Similarly, change the rest of that section of the file to look like the file below. (Pin 1 is a dedicated clock input, which will not be altered.)
7.4 In the text editor, save the file. Also, save the file as pal1.pi.
7.5 Reopen the pal1 schematic in DA. Perform steps 4.1 to 4.9 again. Note the pinout of the PAL as shown in the documentation file looks like the one shown below.
7.6 Exit PLDS II and DA.
8.1 On the computer connected to the BP1400 in room 211, you will need to create your own subdirectory which will have the same name as your user name (if you have not already done so.) Your user name is the same as your login (e.g: s2joshmo). Open a DOS window and type the following:
>> cd\8.2 Keep the DOS window open. Stay in your student directory. In order to program the PAL, the JEDEC file generated above will have to be copied to the computer connected to the BP1400. The easiest way to do this is by using FTP. At the DOS prompt type the following:
>> cd students
>> mkdir <user name>
>> cd <user name>>> ftp vlsi01.egr.vcu.eduYou will be prompted for your login name and password for the SUN lab. Once you are logged in type:>> binaryThe prompt should say "Type set to I." Now you will want to cd into the directory where your JEDEC file is on your UNIX account.>> cd egre427/tut/pal1/mincThe prompt should say "CWD command succesful." Now, to get the JEDEC file, type:>> get pal1.j1The prompt should say "Binary Transfer complete." Now quit ftp:>> quitYou should now be returned to the DOS prompt. Type "exit" at the prompt to close the DOS window.
8.3 Now you will need to start the "BP" program which controls the BP1400 programmer. First, make sure the proper module is on the BP1400 and that no chips are in the zero insertion force socket. Turn the BP1400 on, and wait until only the green LED is lit.8.4 On the desktop of the computer connected to the BP1400, double click on the BP icon to start the program. Wait for the program to finish establishing communication with the programmer before you proceed to the next step.
8.5 Before you can program a chip you must select a device to program and load data into the programmer's buffer.
8.6 To select a chip, choose the Select submenu from the main menu. (There is no mouse, so use the arrow keys or press the first letter of the menu item you want; once highlighted, press enter.) Type in PALCE22V10H-25/4 if it is not already selected. Press the enter key. The chip should now be selected.
8.7 To load the buffer, choose Buffer/Load from the main menu. Type in the directory where the JEDEC file is located, followed by "*.j1" (e.g: C:/students/s2joshmo/*.j1). Select your file in the list of files that appears and press return. Make sure that JEDEC is highlighted in the Type field and press return.
8.8 After putting on a grounded wrist strap, carefully remove a PAL device (numbered PALCE22V10H-25PC/4) from its package and place it in the zero insertion force socket. Make sure the dot on the corner of the chip is at the upper right, and the device is all the way at the top of the socket.
8.9 Choose Device/Program from the main menu and press return. The yellow "active" LED will light while the device is programming. A short high pitched beep will be heard when the device is finished programming, and the green "PASS" LED will light. After the device is programmed, remove it from the zero insertion force socket. It is now ready to be inserted into the test board.
You have completed the PLDS II tutorial.
