20. The dataset interrupt flag, available only on the B option, indicates that a dataset signal has made a transition. 数据串中断标志指示数据串信号已经完成转换,它仅仅在选项B的时候有效。 interrupt 词典解释 1.打断(某人) If you interrupt someone who is speaking, you say or do something that ...
In extreme cases, when interrupt events can happen so frequently that you worry you might not even complete the service routine before the next event is detected, you might want to clear the interrupt flag at the very top of the function in order to be able to “catch” the next one. ...
This means selectively disabling lower priority interrupts, using the enable bits, when a more important process is in progress. For example, when reading a serial port, the data has to be picked up from the port before being overwritten by the next data to arrive, so this should have ...
This means that the register state is preserved at the start of an ISR and restored at the end of an ISR. It ensures that the function that was interrupted is not affected by the ISR. A Basic Interrupt System This is a general description of an interrupt system (biased slightly to PIC ...
Linux sticks to the Symmetric Multiprocessing model (SMP); this means, essentially, that the kernel should not have any bias toward one CPU with respect to the others. As a consequence, the kernel tries to distribute the IRQ signals coming from the hardware devices in a round-robin fashion ...
In this month'sJava theory and practice, concurrency expert Brian Goetz explains what InterruptedException means, why it is thrown, and what you should do when you catch one. This story is probably familiar: You're writing a test program and you need to pause for some amount of time, so...
Because the interrupt handler can potentially gain control of the machine, we don't let just anybody associate an interrupt. The thread must haveI/O privileges— the privileges associated with being able to manipulate hardware I/O ports and affect the processor interrupt enable flag (the x86 pro...
Weâll be working with theshortmodule from the previous chapter; with some small additions it can generate and handle interrupts from the parallel port. The moduleâs name,short, actually meansshort int(it is C, isnât it?), to remind us that it handlesinterrupts...
TheVectorparameter specifies the hardware interrupt vector for this interrupt. We don t care what this number is because we re just going to act as a conduit between the PnP Manager andIoConnectInterrupt. All that matters is that the HAL understand what the number means. ...
When the service routine is completed, the microprocessor resumes its program instructions (Figure 13.6). All microprocessors allow a part of the memory to be designated as astack. This means simply that some addresses are used by the microprocessor for temporarily storing register contents, making ...