channel =5;

#INT_TIMER2 
timer_routine(void) 
{

		channel++;
	
	if (channel == 7) 
		{
			channel = 5;
		}

//++++++++++++++Grüne Kontrollled bei bertieb+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

	counter++;

	if (counter==1980)
		{
			output_high(LED_GREEN);
		}

	if (counter==2000)
		{
			output_low(LED_GREEN);
			counter=0;
		}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

			
		msec++;			//Zählen der Zykluszahl, entspticht nur dann ms Zahl wenn timer auf 1ms eingestellt ist
	if (msec ==60001) 
		{
		msec = 1; 		//zeitstempel wird nach einer Minute wieder auf eins gesetzt
		min++;
		}


	DATA1 = read_adc_value(channel);						//Auslesen eine Werts

	DATA2 = convert_to_volts(DATA1);						//umrechnen in Volt Achtung! sehr Zeitintensiv durch Division
	printf("%D_%03.2f_%lu\n\r",channel,DATA2,msec);
	DATA1=0;
	DATA2=0;

	if(input(ON_OFF))				//checking power Button
		{	
		output_low(POWER);			//Power off
		delay_ms(1000);
		}				
}



void main()
{



int8  errorvar;

output_high(POWER);
delay_ms(100);

setup_spi(spi_master |spi_h_to_l |spi_clk_div_16); //setup for SPI-communication
SSPSTAT&=0XBF; //löscht den 6.Bit

output_high(LED_RED);

errorvar = connect_with_search(); 		// setup connection to master
error (errorvar);						// assign error to error function if necessary

puts("\n\rBT connected");				// bt-connection test-string

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
/*
//initialising the 4 ADC
//Writing to the clockregister and to the setupregister of each ADC
//for the possible options see at the file defines-end.h: 
//Operation modes, Gain settings, Polar operations, Update rates
//second write-operation to set ADC into NORMAL mode
//ATTENTION: Gain settings, Polar operations, Update rates have to be the same as first

*/

	output_low(CS3);
	setup_adc_device(ADC_SELF,ADC_GAIN_1,ADC_UNIPOLAR,ADC_500);
	printf("ADC3 is calibrating\n\r");
	delay_ms(3000);
	setup_adc_device(ADC_NORMAL,ADC_GAIN_1,ADC_UNIPOLAR,ADC_500);
	output_high(CS3);
	
	output_low(CS4);
	setup_adc_device(ADC_SELF,ADC_GAIN_1,ADC_UNIPOLAR,ADC_500);
	printf("ADC4 is calibrating\n\r");
	delay_ms(3000);
	setup_adc_device(ADC_NORMAL,ADC_GAIN_1,ADC_UNIPOLAR,ADC_500);
	output_high(CS4);


setup_timer_2(T2_DIV_BY_16, 173, 2);		//Timer2 set to 2ms

enable_interrupts(INT_TIMER2);
enable_interrupts(GLOBAL);

do {} while(1);

}






Hier noch die Funktionen:


//+++++++Read of a 16 bit data+++++++++++++++++++++++++
long int read_adc_word()
{
	long idata_h, idata_l;
   	idata_h = spi_read(0);
   	idata_l = spi_read(0);
   	return ((idata_h << 8) | idata_l);
}



//setup the device paramaters(mode, gainsetting, polar operation and output rate)
void setup_adc_device(int calmode, int gainsetting, int operation, int rate)
{
 	spi_write( 0x20 );//Communications Register set to write of clock register
	spi_write( rate );//Clock Register info here
  	spi_write( 0x10 );//Communications Register set to write of setup register
	spi_write( calmode|gainsetting|operation);//Setup Register info here
 /*
//Versuch eine zweite Calibrierung mit zweitem Kanal daher 0x11 ins com reg
 	delay_ms(3000);
	spi_write( 0x11 );//Communications Register set to write of setup register
	spi_write( (calmode|gainsetting|operation)&0xfe);//Setup Register info here //Versuch letztes bit zu löschen siehe datenblatt (wurde auch für ersten Kanal versucht)
*/
}



//read an adc  value from the specified channel
long int read_adc_value(int ch)
{
   long int value;
	if (ch==1||ch==2)
		{
			output_low(CS1);
		if(ch%2)
			{
   		   spi_write(0x38);//communications register set to read of data register of channel 1
  		 	}
		else
			{
  		    spi_write(0x39);//communications register set to read of data register of channel 0
			}   
   			while ( input(DRDY1) );
			value=read_adc_word();
			output_high(CS1);
			return value;
		}
	if (ch==3||ch==4)
		{
			output_low(CS2);
		if(ch%2)
			{
   		   spi_write(0x38);//communications register set to read of data register of channel 1
  		 	}
		else
			{
  		    spi_write(0x39);//communications register set to read of data register of channel 0
			}   
   			while ( input(DRDY2) );
			value=read_adc_word();
			output_high(CS2);
			return value;
		}
	if (ch==5||ch==6)
		{
			output_low(CS3);
	//	while ( !input(DRDY3) );   //VErsuch wie im Orig Driver Programm bleibt hier Hängen => DRDY wird nicht hight oder zu kurz high!!
		if(ch%2)
			{
   		   spi_write(0x38);//communications register set to read of data register of channel 1
  		 	}
		else
			{
  		    spi_write(0x39);//communications register set to read of data register of channel 0
			}   
   		
		
			while (input(DRDY3) );
			value=read_adc_word();
		//	printf("DRDY3 high");
			output_high(CS3);
			return value;
		}
	if (ch==7||ch==8)
		{
			output_low(CS4);
			if(ch%2)
				{
   			   spi_write(0x38);//communications register set to read of data register of channel 1
  			 	}
			else
				{
  			    spi_write(0x39);//communications register set to read of data register of channel 0
				}   			
			while ( input(DRDY4) );
			value=read_adc_word();
			output_high(CS4);
			return value;
		}
}


//disable the a/d conversion
void adc_disable()
{
 	spi_write( 0x20 );//Communications Register set to write of clock register
	spi_write( 0x10 );//Clock Register info here
}


//+++++++++++++Convert the value read to volts+++++++++++++++++++++++++++++++++++++++++++++++++
//Caution! caused by the division this funktion takes a lot of time
float convert_to_volts(long data)
{
   return ((float)data*1.25/65535);	//1.25 is Vref
}