Photograph by Sparkle Labs
DIGITAL CLOCK
Programming PIC microcontrollers, part 3.
In parts 1 and 2 of our microcontroller primer (MAKE, Volume 04, page 158, “Microcontroller Programming,” and Volume 07, page 149, “Hello, World”), we got a PIC chip development system up and running, covered basic inputs and outputs, and left off by showing how to use a PIC chip by itself to control a simple pushbutton counter. In this article, we’ll show how to use a PIC along with other chips to make a digital clock.
Our two peripheral chips are the DS1305 Real Time Clock (RTC), which keeps track of the time, and the MAX7221, an LED display driver. ...
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