I use custom board with cyclonev chip.
I use BOOTSEL and BOOTSEL pings as GPIO28, 60 by bi-directional ping.
BOOTSEL and  are pulled-up by 10k ohm and I can read ping level(high level) through GPIO_EXT_PORTA register.
But I can't set LOW both ping with GPIO_SWPORTA_DR and DDR registers.
How should I set parameters to any registers ?
Or are thre any restriction to use BOOTSEL pings as GPIO output?