SWI Soft Interrupt Detailed Explanation
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Reference address：SWI Soft Interrupt Detailed Explanation
Soft interrupt:
Programming exceptions are usually called soft interrupts.
Soft interrupts are a signal communication method used to simulate hard interrupts between communication processes.
After the interrupt source sends an interrupt request or soft interrupt signal, the CPU or receiving process automatically performs interrupt processing or completes the function corresponding to the soft interrupt signal at the appropriate time.
Programming exceptions are usually called soft interrupts.
Soft interrupts are a signal communication method used to simulate hard interrupts between communication processes.
After the interrupt source sends an interrupt request or soft interrupt signal, the CPU or receiving process automatically performs interrupt processing or completes the function corresponding to the soft interrupt signal at the appropriate time.
A soft interrupt is an interrupt implemented by software, that is, an interrupt caused by other programs when the program is running; while a hard interrupt is an interrupt implemented by hardware, that is, an interrupt caused by the device when the program is running.
1. The time when a soft interrupt occurs is controlled by the program, while the time when a hard interrupt occurs is random.
2. Soft interrupts are caused by program calls, while hard interrupts are caused by peripherals.
3. The hardware interrupt handler must ensure that it can complete its task quickly so that the program will not wait for a long time when executing.
2. Soft interrupts are caused by program calls, while hard interrupts are caused by peripherals.
3. The hardware interrupt handler must ensure that it can complete its task quickly so that the program will not wait for a long time when executing.
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