File content as of revision 3:3bdbf15ff26b:

/*******************************************************************************
*EECS397
*
*Assignment Name: Lab 3; Scan Mux Fun2
*
*Author(s): Ashley Roberson, Michael Codega
*
*Purpose: Read analog data off multiplexer, determine if changed,& print results
*
*Last Modified: February 8, 2018
*
*******************************************************************************/
#include "mbed.h"
#define NUMCHANNELS 16
#define TOLERANCE 10

Serial pc(USBTX, USBRX);
char input;

void scanChannel(float *voltages);
bool checkChange(float *reference, float *voltages, float tolerance);

float channelData[NUMCHANNELS];
BusOut muxSel(PC_6, PB_15, PB_13, PB_12);

AnalogIn muxOut(PB_1);



int main(void)
{
    float reference[NUMCHANNELS];
    float voltages[NUMCHANNELS];
    scanChannel(reference);
    while(1) {
        // wait for an input character to be rx'ed
        while(!pc.readable()) {
            ; // do nothing
        }

        input = pc.getc();

        // business logic:
        // scan 16 channels, store those values in array
        // print array
        scanChannel(voltages);
        bool hasChanged = checkChange(reference, voltages, TOLERANCE);
        if (hasChanged)
            pc.printf("Data has changed!\n");
        else
            pc.printf("No Change!\n");
        pc.printf("Printing for Scan_Mux_Fun2.\n");

        for(int i = 0; i < NUMCHANNELS; i++) {

            //print out
            pc.printf("The channel data for %d is: %f The reference data for %d is: %f\n", i, voltages[i] * 3.3f, i, reference[i] * 3.3f);

        }
    }
}

void scanChannel(float *voltages)
{

    for(int i = 0; i < NUMCHANNELS; i++) {
        // scan channels
        muxSel = i;

        wait(0.00001);

        voltages[i] = muxOut.read();
    }
}

bool checkChange(float *reference, float *voltages, float tolerance)
{
    //scanChannel(voltages);
    for (int i = 0; i < NUMCHANNELS; i++) {
        //pc.printf("Voltage: %f Reference: %f\n", voltages[i], reference[i]);
        if ((voltages[i] - reference[i]) > tolerance * .001)
            return true;
        else if((reference[i] - voltages[i]) > tolerance * .001)
            return true;
    }
    return false;
}