THE MAGAZINE FOR COMPUTER APPLICATIONS
Circuit Cellar Online offers articles illustrating creative solutions
and unique applications through complete projects, practical
tutorials, and useful design techniques.

EMBEDDED MULTITASKING

The Easy Way
by Charles Kosina

Start ý An Example ý State Machine Control ý Keyboard Scanning ý Receive Serial Data ý LCD Module ý Transmit Data ý Debugging Techniques ý Other Options ý Sources and PDF

TRANSMIT DATA

Task 4, shown in Figure 4, waits for the Enter key to be pressed before sending the line of keyed-in data. While the data is being transmitted, setting the kb_disable bit inhibits the keyboard-scanning task. After a delay of 2 s, the line is blanked and the keyboard scanning is enabled again.

Figure 4ýFour states control the transmission of serial data. A data ready flag initiates the transmission. On completion, there is a 2-s delay before the LCD line is blanked.

PREVIOUS • NEXT