Using PICBASIC PRO™ with 18F and 18C PICmicro® MCUs.

This page is obsolete.  Please refer to the MPLAB installation page for updated information.

When using PICBASIC PRO™ Compiler with the 18 series PICmicro MCUs, you must use the Microchip assembler, MPASM.  This free tool is included on the PBP installation CD (check the box that installs MPLAB during the install process).   If you don't have the CD or the version from the CD is obsolete, you can download the assembler here.  If you're using MPASM and PBP together for the first time, follow the installation instructions below.  If you already have a working installation of MPASM, you can replace the existing files with those included in the download.

OBSOLETE DOWNLOADS REMOVED

Once downloaded, extract the files to an empty folder on your computer ("C:\MPASM").  DO NOT extract the files into your PBP folder!  Make a note of the location that you extracted to.

Users of MicroCode Studio may skip the rest of this procedure.  Use the Options dialog in your software to select the MPASM assembler and locate the exe file (mpasmwin.exe).

In CodeDesigner and CodeDesigner Lite, click Compiler Options in the Compile menu.  In the resulting dialog, locate the field labeled "Command Line Options:".  In this space, type "-aMPASMWIN" (without the quotes) and click OK.

If you invoke PBP from a command line in a DOS prompt, simply add the -a switch to the command.  Example: "PBPW.EXE   -aMPASMWIN   -p18F452   blink.bas"

If you use CodeDesigner, CodeDesigner Lite, or a command line to invoke the compiler, you will need to include the location of MPASM in the PATH environment variable on your computer, as described below.

Windows 95/98/ME

The search path is specified in a file called autoexec.bat, that should be located in the root directory of your C drive (C:\).  You can edit the file with a text editor such as notepad, or run msconfig (Win98 and ME only).  

The path statement uses the format: PATH=path1;path2;....  Add the location of MPASM to the end of the line, separating each path with a semicolon.

An example path statement is: PATH=C:\WINDOWS;C:\PBP;C:\MPASM

Restart your computer after making changes to the autoexec.bat file.

Windows NT

In Windows NT, the path statement is found on the Environment tab of the system properties dialog box.  

Right click the My Computer icon on your desktop and click Properties.  Click the Environment tab.

Find the Path variable in the System Variables window and click to highlight it.  The Variable and Value textboxes should fill with the Path information.

Add the location of MPASM to the end of the line in the Variable Values text box, separating each path with a semicolon.

An example path statement is: %SystemRoot%\System32\;C:\PBP;C:\MPASM

Restart your computer after making changes to the path variable.

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Windows 2000/XP

The path statement is found in the Environment Variables dialog box.  To get there, right-click the My Computer icon on your desktop and select Properties.  

Click the Advanced tab, then the button labeled Environment Variables....  Find the Path variable in the System Variables window, highlight the line, and click Edit. 

Add the location of MPASM to the end of the line in the Variable Values text box, separating each path with a semicolon.

An example path statement is: %SystemRoot%\System32\;C:\PBP;C:\MPASM

Restart your computer after making changes to the path variable.