USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
7.10. GPIO_GET_ADC_VAL (0x11)
Current command is reserved for backward compatibility with previous versions of GPIO-24 adapter. For new development, use:
GPIO_SET_ADC_MODULE_CFG command to configure
USB-I/Oadapter ADC module;GPIO_SET_ADC_CHANNEL_CFG command to configure
USB-I/Oadapter ADC channels (analog inputs).
