main.cpp

/** RGB LED Strip (SPI)
*/
#include "mbed.h"

// SPI 1 oder 2, da kein SS
SPI spi( MBED_CONF_IOTKIT_LED_SPI_MOSI, NC, MBED_CONF_IOTKIT_LED_SPI_SCLK ); // mosi, miso, sclk

/** 3 x 3 Werte */
unsigned int strip[9];

void writeLED()
{
	for ( int p = 0; p < 9; p++ )
		spi.write( strip[p] );
}

void clearLED()
{
	for ( int p = 0; p < 9; p++ )
	{
		strip[p] = 0;
		spi.write( strip[p] );
	}
}

int main()
{
	printf( "LED Strip Test \n" );

	spi.format( 8,0 );
	spi.frequency( 800000 );

	while (true)
	{
		// Gruen, Rot, Blau - von Dunkel bis Hell
		for ( int i = 0; i < 128; i+=32 )
		{
				// LED 1
				strip[0] = i;
				strip[1] = 0;
				strip[2] = 0;
				// LED 2
				strip[3] = 0;
				strip[4] = i;
				strip[5] = 0;
				// LED 3
				strip[6] = 0;
				strip[7] = 0;
				strip[8] = i;
				writeLED();
				thread_sleep_for( 100 );
		}
		thread_sleep_for( 1000 );
		clearLED();

		// Lauflicht (5 x 4 Zustaende)
		int p = 0;
		for ( int i = 0; i < 20; i++ )
		{
			p++;
			switch  ( p )
			{
				case 1:
					strip[0] = strip[1] = strip[2] = 32;
					break;
				case 2:
					strip[0] = strip[1] = strip[2] = 0;
					strip[3] = strip[4] = strip[5] = 32;
					break;
				case 3:
					strip[3] = strip[4] = strip[5] = 0;
					strip[6] = strip[7] = strip[8] = 32;
					break;
				default:
					clearLED();
					p = 0;
					break;
			}
			writeLED();
			thread_sleep_for( 200 );
		}
	}
}