- #How to use oscilloscope in pspice schematics code#
- #How to use oscilloscope in pspice schematics Pc#
#How to use oscilloscope in pspice schematics code#
It's because they all call the same library code, which adjusts itself somewhat for the kind of file the programmer expects the user to work with, and the returns the details of the file to the program which called it to do what it needs - probably using another library in-out (I/O) function to read or write from or to that file.Īrduino code uses similar libraries to handle its sketches (which we might otherwise call programs), each designed to simplify the use of whatever hardware you're using - you're benefiting from the experience of early Windows users like me in the encapsulation of objects such as hardware shields with their assorted code. Code blocks like that, polished for the environment, are at the core of Windows Dynamic Link Libraries (.DLL files in the Windows Systems Directory), so whenever someone wants to find out what file the user wants data written to, they always get the same popup window. You'll perhaps have noticed that the timer interrupt handler code can be used to run anything needing to react to the timer events. OK, I've simplified a bit because some are not quite so single-threaded as that, but if you design at that level, you'll not go wrong. So while it's not reacting to the clock it can be sending the last reading to the PC, but needs to perhaps hold up a sec and buffer the last data read onto a queue ready to send if the transfer's not going well. You have to remember that your poor little Arduino can only really do one thing at a time, but can do a bit of this, then a bit of that, then a bit of t'other. And none of it visible to the user unless things go really sour! That last bit could be a tad complicated as it may required a handshaking protocol to confirm its safe transfer, a conversation between the two machines something like "Got data for you" "Yeah, ready to take it" "Right, sending such-and-such" "Finished, Got it?" "Yeah, got such-and-such" "OK, done" with loop-rounds in case any of the steps fails. In the case of an oscilloscope, a timer interrupt handler you've written reacts once every so many cycles by telling another piece of code to read a level from an input and sending it over USB to a data list of some sort on a PC, most likely.
There are obviously a significant number of interrupts in the system, showing what's going on within the chip, and it's not my intention to go into them here. If it hangs, you reset - welcome back to the early days of PCs.
#How to use oscilloscope in pspice schematics Pc#
You won't see it much in PC programming unless you work in Assembler, as it's buried in layers of protective coding because if you handle it wrong you can do nasty things to your PC.Īn Arduino, by comparison, is a simpler beast and you're unlikely to be doing twenty other things at the same time which you might get narked if you lose. That signal triggers the Interrupt each time it happens, your program hook reacts to the click and does what it has to. Say you want something to happen once a cycle in the PC clock timer. It's an old-fashioned term from the early days of computing which has survived because it's not quite the same as an event handler - it's a hook off which an event handler can be hung. Someone had a problem with understanding interrupts.