- /* Macros: */
- #if !defined(__DOXYGEN__)
- #define _GETADCMUXMASK2(x, y) x ## y
- #define _GETADCMUXMASK(x, y) _GETADCMUXMASK2(x, y)
+ #if defined(USB_SERIES_4_AVR) && ((VTARGET_ADC_CHANNEL == 2) || (VTARGET_ADC_CHANNEL == 3))
+ #error The U4 AVR chips do not contain ADC channels 2 or 3. Please change VTARGET_ADC_CHANNEL or define NO_VTARGET_DETECT in the makefile.