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1 | /* getvolt.c WinSystems PCM-MIO driver Demonstration Program |
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2 | * |
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3 | * $Header$ |
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4 | * |
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5 | * $Id$ |
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6 | * |
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7 | * $Log$ |
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8 | * |
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9 | * |
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10 | * Compile with : |
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11 | * |
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12 | * |
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13 | * gcc getvolt.c mio_io.o -o getvolt |
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14 | * |
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15 | * |
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16 | * This program demonstrates the adc_auto_get_channel_voltage |
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17 | * function. It reads the voltage on the channel specified |
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18 | * prints the value and then exits. |
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19 | * |
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20 | */ |
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21 | |
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22 | #include <stdio.h> |
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23 | #include <stdlib.h> |
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24 | #include "mio_io.h" |
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25 | |
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26 | main(int argc, char *argv[]) |
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27 | { |
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28 | int channel = 0; |
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29 | float result; |
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30 | |
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31 | |
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32 | /* If an argument is present,we'll use is as the channel |
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33 | number. Otherwise we'll default to channel 0 |
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34 | */ |
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35 | |
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36 | if(argc > 1) |
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37 | channel = atoi(argv[1]); |
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38 | |
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39 | /* We'll let the driver validate the channel number */ |
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40 | |
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41 | result = adc_auto_get_channel_voltage(channel); |
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42 | |
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43 | /* Check for an error */ |
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44 | |
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45 | if(mio_error_code) |
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46 | { |
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47 | |
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48 | /* If an error occured. Display the error and exit */ |
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49 | |
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50 | printf("%s\n",mio_error_string); |
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51 | exit(1); |
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52 | } |
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53 | |
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54 | /* Print the results */ |
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55 | |
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56 | printf(" Channel %d = %9.4f\n",channel,result); |
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57 | } |
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58 | |
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59 | |
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