How to calculate the interrupt period of dsp

In the programming of DSP (Digital Signal Processor), in order to realize some functions, we usually use interrupts, and the calculation method of interrupt period is as follows:

1. First, it is necessary to determine the clock frequency of the DSP chip used and the counting accuracy of the timer.

2. Then, according to the required interrupt cycle time, calculate how many counting cycles are needed to generate an interrupt. For example, if you set a timer, it needs 50us to interrupt once. Assuming that the clock frequency is 100MHz and the timer precision is 16 bits, then the timer counts 10000000 times per second, and 50us counts 5000 times, that is, an interrupt will be generated every 5000 times.

3. Set timer interrupt parameters according to configuration registers and corresponding timer control registers provided in DSP chip manuals and development tools, and initialize timer initial values and interrupt service programs.