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PJRC Store 8051 Dev Board, $79 LCD 20x2 Display, $11 Serial Cable, $5 12 Volt Power, $8 More Components... 8051 Tools Main Page Software Overview Linux AS31/SDCC Windows AS31/SDCC AS31 Manual AS31 Inst. List Old AS31 PAULMON Monitor Development Board Code Library 89C2051 Programmer Other Resources

AS31, SDCC and GNU Make For Windows Systems

Step 1: Old Version of Windows 95

Very old versions of Windows 95, such as the one Microsoft actually shipped in 1995, lack the required C runtime libraries to run this program. If you have this old version, in all likelihood some other software you've installed has already updated your libraries. If not, you will need to install the Windows Library Update service pack (link to Microsoft's download page... scroll down to the "Service Packs" section).

These programs will not run on 16 bit platforms (Windows 3.11, MSDOS 6.x, etc).

Step 2: Unpack The ZIP File

AS31 and Make do not require any support files, but they are included in SDCC's "BIN" subdirectory, so that they will be able to run with the PATH command in step 4.

Step 3: Move To C:\SDCC

This image shows the SDCC directory moved to the recommended location.

Figure 1: SDCC Installed In C:\SDCC With All Subdirectories Intact. SDCC expects to find "INCLUDE" and "LIB" in these locations.

Step 4: Set up MS-DOS Prompt Shortcut with correct PATH

1. Launch Windows Explorer, Start -> Programs -> Windows Explorer
2. Navigate to C:\Windows\Start Menu\Programs
3. Right click, hold and drag the "MS-DOS Prompt" shortcut to the desktop
4. Select "Copy Here" when the popup menu appears as you release
5. Right click on the new shortcut, and select Properties
6. Select the Program tag
7. Set "Batch file:" to "C:\SDCC\SDCCPATH.BAT"
8. Set "Working:" to "C:\SDCC" (or whatever directory your project code will be in).
9. Click Apply and OK to save your changes.

Figure 2: MS-DOS Prompt Shortcut Properties To Run SDCCPATH.BAT

Windows XP: Use the start menu, click "All Programs", navigate to Accessories and then click and hold with the right mouse button on "Command Prompt" and drag it to your desktop, and select "Copy Here" in the popup menu. Microsoft removed the ability to run a batch file from the properties dialog... you can run the batch file manually, or manually type a command to add SDCC to your path. TODO: is there a way to do this automatically in XP ???

Step 5: Your C-Based Project Should Be On C: Drive

If you get errors like these:

test.c:1:20: stdio.h: No such file or directory

?ASlink-Warning-Undefined Global '__sdcc_external_startup' referenced by module 'test'

then SDCC is probably not able to find its library or include files. These error message claim that SDCC can not find items which are clearly supposed to be provided by SDCC's standard library.

Check the directory placements (step 3) and make sure the current directory in your MS-DOS Prompt shows the same drive as where SDCC is installed.

The putchar() function required for printf is NOT provided in SDCC's libraries (this may change someday). You must write a putchar function. See the LED Blink Example for a simple putchar function.