Stuff

//*****************************************************************************
// File Name	: a2dtest.c
// 
// Title		: example usage of some avr library functions
// Revision		: 1.0
// Notes		:	
// Target MCU	: Atmel AVR series
// Editor Tabs	: 4
// 
// Revision History:
// When			Who			Description of change
// -----------	-----------	-----------------------
// 20-Oct-2002	pstang		Created the program
//*****************************************************************************
 
//----- Include Files ---------------------------------------------------------
#include <avr/io.h>		// include I/O definitions (port names, pin names, etc)
#include <avr/signal.h>	// include "signal" names (interrupt names)
#include <avr/interrupt.h>	// include interrupt support

#include "global.h"		// include our global settings
#include "uart.h"		// include uart function library
#include "rprintf.h"	// include printf function library
#include "timer.h"		// include timer function library (timing, PWM, etc)
#include "buffer.h"     // include buffer function library
#include "a2d.h"		// include A/D converter function library
#include "vt100.h"		// include VT100 terminal support

#define NOS 20000           // Define number of milliseconds between collects
#define NOC 30              // Define number of collects (1-512) between reset

//global variables
unsigned int volts;       // Current value of Battery Volts
unsigned int shuntvolts;  // Current value of Shunt Volts
unsigned int pulse;       // Pulses per Second
unsigned int windpulse;   // Windspeed Pulses per second
unsigned int mode;        // Dummy load on or off

//function prototypes
unsigned int ADCaverage (int n);           //average over n samples

unsigned int ADCaverage (int n){
unsigned int currentvalue = 0;             // incremental value
unsigned int count;                        // amount of samples to take
    for(count=0;count<n;count++) {         // initialise array
        ADCSRA |= _BV(ADSC);               // start conversion
        while (ADCSRA & _BV(ADSC) ) {}     // wait until conversion completed
        currentvalue = (ADC+currentvalue); //running total
    }
	return (currentvalue/n);           //Divide by n for average
}

//----- Begin Code ------------------------------------------------------------
int main(void)
{
    unsigned int x = 0;
	
	uartInit();
	uartSetBaudRate(4800);		// set UART speed to 9600 baud
	rprintfInit(uartSendByte);
	timerInit();
	a2dInit();

	vt100ClearScreen();
	rprintf("Hi i am alive at least\r\n",shuntvolts,pulse,windpulse);
	
	// configure a2d port (PORTC) as input
	// so we can receive analog signals
	DDRC = 0x00;
	// make sure pull-up resistors are turned off
	PORTC = 0x00;

	a2dSetPrescaler(ADC_PRESCALE_DIV64);
	a2dSetReference(ADC_REFERENCE_256V);

	// use a2dConvert8bit(channel#) to get an 8bit a2d reading
	// use a2dConvert10bit(channel#) to get a 10bit a2d reading

	while (1)                 // do this until finished or broken
	    vt100SetCursorPos(1,1);
    {
        for(x=0; x<NOC; x++)              // Repeat NOC amount of times
    {
        ADMUX = 0;                     // Select pin ADC0 using MUX temp sensor 1
        volts = ADCaverage(1);    // Get ADC Value
        ADMUX = 1;                     // Select pin ADC0 using MUX temp sensor 2
        shuntvolts = ADCaverage(1);    // Get ADC Value
        ADMUX = 2;                     // Select pin ADC0 using MUX temp sensor 3
        pulse = ADCaverage(1); // Get ADC Value
        ADMUX = 3;                     // Select pin ADC0 using MUX temp sensor 4
        windpulse = ADCaverage(1);// Get ADC Value

        // print current top temperatures correct to 1 decimal place (ie. 25.3 )
		rprintf("[<V>%d</V><A>%d</A><R>%d</R><S>%d</S><M>0<M>]\r\n",volts,shuntvolts,pulse,windpulse);
        timerPause(NOS);      // pause for interval between checking routine
        }
    } 
}