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#Spike 2 ced free code
Thus, it's often better to implement these tasks as microprocessor code (because processors give you lousy speed-compared to dedicated hardware-but fantastic complexity). It's a pain slowing the hardware down to implement this sort of function (using huge counters to generate delays, for example). Millisecond logic: This is the logic used to implement interfaces such as reading switch positions and flashing light-emitting diodes, or LEDs.
#Spike 2 ced free software
Microsecond logic: This is reasonably fast and can be implemented either in hardware or software (this type of logic is where you spend the bulk of your time deciding which way to go).
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Picosecond and nanosecond logic: This has to run insanely fast, which mandates that it be implemented in hardware (in the FPGA fabric). One of the main partitioning criteria is how fast you wish the various functions to perform their tasks: While such software is likely to be costly compared to standard packages, CED is probably one of the few companies willing to entertain this kind of customised work at a credible price.Īs noted in Chapter 2, almost any portion of an electronic design can be realized in hardware (using logic gates and registers, etc.) or software (as instructions to be executed on a microprocessor). CED also produces a significant amount of ‘bespoke’ software, designed specifically for a particular client's application. Spike2 is discussed in more detail in Section 8.8.1. However, its applications are by no means limited to this, and it has a useful built-in macro language for generating complex automated sequences of activity. the extracellular recording and correlation of neuronal activity from multiple sites within a brain (or brain slice) rather than the detailed study of single cell activity). Its features have a bias towards extracellular neurophysiology (i.e. Spike2 is a data analysis environment for acquiring and analysing both analogue signal waveforms and discrete events, such as a nerve firing (hence the name ‘spike’). CED focus on biomedical and some engineering applications, their main biomedical product being the Spike2 package. Without software appropriate to the design of the experiment, a laboratory interface may be of little use, since most users do not have the capability to develop the software from scratch within a practical time scale. It is also possible (though not necessarily easy) to write specific custom commands which can be loaded into the 1401.Īs mentioned earlier, it is not really possible to discuss the merits of an interface unit without discussing what kind of data acquisition software is available for it. The 1401 can support other functions in addition to basic data acquisition activities, including Fourier transforms, time interval histograms and digital pulse generation. Other commands such as TOHOST transfer this data to the host computer.
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Initiates a recording sweep from A/D channel 0 into the 1401's on-board RAM, collecting 2048 A/D samples at intervals of 100 µs.