Controlling pins with M42 on a SKR 1.3 running Marlin

[knas]

Hello, im trying to control various pins with M42 through Marlin but so far im having no luck neither to set values nor to change pin mode from input to output. I'm using both #define DIRECT_PIN_CONTROL and #define PINS_DEBUGGING but to no avail. The end goal is to use the heater outputs to control relays but at this point i really just want to be able to verify that direct pin control works with *any* pin, something i havent been able to do so far. I've verified with M43 that none of the pins im using are protected, any help appreciated.

Thanks

Karl