Previously MCR.MODE[12] = 3, which corresponds to "connected to on chip peripherals with buffer disabled". In this case the DAC output is not connected to the pin, which is quite unexpected.
Change to MCR.MODE[12] = 2, which corresponds to "connected to external pin with buffer disabled". This provides the expected functionality.
Perhaps it would be useful to support connecting the DAC to on-chip peripherals, but that should be available separately to the choice of buffered/unbuffered.
dotcypress
commented
3 years ago
Previously MCR.MODE[12] = 3, which corresponds to "connected to on chip peripherals with buffer disabled". In this case the DAC output is not connected to the pin, which is quite unexpected.
Change to MCR.MODE[12] = 2, which corresponds to "connected to external pin with buffer disabled". This provides the expected functionality.
Perhaps it would be useful to support connecting the DAC to on-chip peripherals, but that should be available separately to the choice of buffered/unbuffered.