The circuit only drives one digital tube, which is a common cathode tube with the common end connected to ground. The segment tube is directly connected to the P2 port of the microcontroller. The microcontroller used is AT89C52. The circuit diagram is as follows:
Through yesterday's explanation of the digital tube, we know that if we want to light up a common cathode digital tube, we only need to connect the common terminal to low level and the segment tube to high level, as shown in the figure below.
So look at the program:
Line 4: field table of common cathode digital tube;
Line 17: for loop, loops 10 times to control the display content of the digital tube;
Line 19: Send the content to be displayed to the digital tube;
The content this time is very simple, I hope it can be a reference for beginners.
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