typedef struct {
			size_t size;
			int *pins;
			int *values;
		} PinConfig;

// ...

StepperAxis::PinConfig xMicrostepPinConfig[4] = {
	{
		2,
		{xMicrostepSettingPin1, xMicrostepSettingPin2},
		{1, 1}
	},
	{
		2,
		{xMicrostepSettingPin1, xMicrostepSettingPin2},
		{1, 0}
	},
	{
		2,
		{xMicrostepSettingPin1, xMicrostepSettingPin2},
		{0, 0}
	},
	{
		2,
		{xMicrostepSettingPin1, xMicrostepSettingPin2},
		{0, 1}
	}
};