Step-by-step lab tutorial

This step-by-step tutorial is geared for students with little familiarity with Linux. This guide will provide assistance for various steps of lab 1 to help you get acquainted with common commands and programs that will be used throughout the course.

Setup - downloading the avrlib and avrlib demos

• To copy things to your directory from a browser, simply click on the linked file. A window will pop up announcing that you have choses to download a file. Select the option "Save this file to disk." This opens another window asking where the file should be saved. Select the location of your ~/250a folder and hit "save."
• To decompress a file, change directories in a terminal window until you are in the directory the file is located in. Type tar xzf avrlib_ccrma-20020923.tar.gz to extract the files.

Examining *.c files

• Read through the demo code and see if you can understand what the program does, and how. Each demo illustrates some aspect of the hardware's capabilities.
• Good programs to use to inspect the *.c files are pico and xemacs.
  ~/avrlib-demo/demo1> pico flash.c
~/250a/avrlib-demo/demo1> xemacs flash.c &

Trying out programs

• First, make sure the hardware is set up correctly. The board should be powered, and a serial cable should join the programming connector to the computers serial port.
• Double check the program's comments to make sure that you have your jumper cables configured correctly.
• Next, compile the files by typing make in the file directory. This creates several files in the directory, most notably a *.hex file which is to be downloaded to the processor.
• Upon sucessful compilation, type make load to download the compiled code on the microprocessor.

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Send comments about this page to gurevich@ccrma.stanford.edu Last modified: Wed Sep 25 15:13:54 PDT 2002