|NI-DAQmx 18.6 Help|
|NI-DAQmx 19.0 Help|
|NI-DAQmx 19.1 Help|
|NI-DAQmx 19.5 Help|
If you want to communicate with an external device using an exchange of signals to request and acknowledge each data transfer, use handshaking.
For example, you might want to acquire an image from a scanner. The process involves the following steps:
This process repeats until all the samples are transferred.
|Note Not all devices support handshaking. Refer to your device documentation to see if handshaking is supported on your device. For E Series devices, only those devices with more than eight digital lines—those devices that have an additional 8255 chip onboard—support handshaking.|