Press the button on parallel port signal to trigger a process

I just need to connect a pushbutton on the parallel port to set it as a signal of the beginning of a process.

When the button is pressed, labview runs a process.

Kindly help me how to do this, the prayer of wiring

Lines of data to use as input Some parallel ports can be configured for use as inputs data lines. This depends a lot on how the manufacturer has designed the parallel port. With some models the data lines can be read in the same way that we read the lines of control, leading them to logic high, so they will take the value of an external signal. However, most parallel ports require that you set the bit of sense for entry. It is bit 5 of the control register (base + 2). If the port is capable of it, setting the high bit for effect to sort of lines-State so it can be driven on the outside. Sometimes it is also necessary activate the 6 bit high or low. However, it is noted that some manufacturers actually block those bits so that the software can edit them. An example is shown below in Figure 7.

Tags: NI Software

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