The example code for usage without "uBit" no longer compiles

[lvml]

At

microbit-docs/docs/advanced.md

Lines 25 to 33 in a456ede

	#include "MicroBit.h"
	MicroBitDisplay display;
	int main()
	{
	while(1)
	display.scroll(":)");
	}

a code example is presented on how to use individual classes from Codal, rather than its entirety via a global "uBit" instance.

This example no longer compiles, as the MicroBitDisplay class has no constructor without parameters. This requires several additional objects, making this example no longer trivial. The smallest working replacement for MicroBitDisplay display; I found was this:

static const MatrixPoint ledMatrixPositions[5*5] =
{
    {0,0},{0,1},{0,2},{0,3},{0,4},
    {1,0},{1,1},{1,2},{1,3},{1,4},
    {2,0},{2,1},{2,2},{2,3},{2,4},
    {3,0},{3,1},{3,2},{3,3},{3,4},
    {4,0},{4,1},{4,2},{4,3},{4,4}
};

auto capTouchTimer = NRFLowLevelTimer(NRF_TIMER3, TIMER3_IRQn);
auto touchSensor = NRF52TouchSensor(capTouchTimer);
auto adcTimer = NRFLowLevelTimer(NRF_TIMER2, TIMER2_IRQn);
auto adc = NRF52ADC(adcTimer, 91);
auto io = MicroBitIO(adc, touchSensor);
NRF52Pin* ledRowPins[5] = {&io.row1, &io.row2, &io.row3, &io.row4, &io.row5};
NRF52Pin* ledColPins[5] = {&io.col1, &io.col2, &io.col3, &io.col4, &io.col5};
const MatrixMap ledMatrixMap = MatrixMap{ 5, 5, 5, 5, (Pin**)ledRowPins, (Pin**)ledColPins, ledMatrixPositions};
auto display = MicroBitDisplay(ledMatrixMap);

... which may be too long for a convincing example.

[lvml]

I should mention, though, that above cumbersome replacement did allow me to almost halve the size of the resulting binary for my software. So not using uBit is still an interesting option to save resources.