Open external ADC in DMA mode

Some boards (e.g. Z48-C1) allow the connection of external AD converters.
This page describes how to open an external ADC device in DMA mode.

Notes:

• This example connects an AD7656 to the Z48-C1 core module
• See z48-c1 manual page 12 and 26 for example schematics
• use the the open VI from the external palette (NOT the Z48-C1 palette)
• Select DMA channel 1 (J5 pin 24)
• Select TMR reference TMR_G (J5 pin 23)