In many designs, it is necessary to have a wonderful and practical LED flashing to indicate whether the device is working properly and the working status. In some designs where real-time requirements are not high, you can use the insertion delay to control the LED flashing.
Its shortcomings are obvious:
1. The LED flashing mode responds slowly.
2. During the delay process, other work cannot be done (except interruption), which wastes resources.
3. The code is long. There are only a few instructions to actually control the LED, and the other delay codes take up 99% of the space.
If TMRI or TMR2 is used as a clock, the above disadvantages can be avoided.
The following is an example of C code using TMR1 as the clock (RB1, RB2, RB3 control LED):
Such a framework is very effective for programs based on software queries that require high real-time performance.
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PIC microcontroller controls LED light demonstration code
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Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
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