Отправлено ы 20 марта 2006 г. 14:12 В ответ на: А что это за термин? Не слышал. отправлено SM 20 марта 2006 г. 14:08

2.1 How can spurious interrupts occur?
Let’s consider a real-life application:
1. Vectored Interrupt Controller (VIC) detects an IRQ interrupt request and sends the
   IRQ signal to the core.
2. Core latches the IRQ state.
3. Processing continues for a few cycles due to pipelining.
4. IRQ Handler loads Interrupt Service Routine (ISR) address from VIC.
   Spurious interrupts can occur if, in step 3 the VIC state changes.This could happen under
   the following conditions.

1. The instruction being executed in step 3 disables interrupts.
2. The interrupt which caused the IRQ signal in the first place got cleared.
The first condition may take place while using a watchdog in the application. The second
condition may take place when the RDA/CTI interrupt is enabled in the UART. Please note
that using these peripherals does not necessarily mean that spurious interrupts will
always take place. The timing of the interrupt coupled with the instructions in the pipeline
would lead to the occurrence of spurious interrupt. It is recommended to program a
spurious interrupt handler if the above peripherals are used.

• но скорее тут это не оно, т.к. прыжок на реальный вектор идет. а причина в пунктах 2-3 — ы   (20.03.2006 14:14 80.92.98.211, пустое)

E-mail: info@telesys.ru