source: multiio/pcmmio/original/dacout.c @ da59d43

Last change on this file since da59d43 was 2bae2aa, checked in by Joel Sherrill <joel.sherrill@…>, on Jun 8, 2009 at 2:52:43 PM

Initial import.

  • Property mode set to 100644
File size: 1.2 KB
Line 
1/* dacout.c WinSystems PCM-MIO driver Demonstration Program
2*
3*  $Header$
4*
5*  $Id$
6*
7*  $Log$
8*
9*
10*  Compile with :
11*
12*
13*       gcc dacout.c mio_io.o -o dacout
14*
15*
16*       This extremely simple program uses the set_dac_voltage function to update
17*   the dac output to a specific voltage.
18*/
19
20#include <stdio.h>
21#include <stdlib.h>
22#include "mio_io.h"
23
24main(int argc, char *argv[])
25{
26int channel = 0;
27float voltage;
28
29        /* We must have arguments for channel and voltage */
30
31        if(argc != 3)
32        {
33                printf("usage : dacout channel voltage\n");
34                exit(1);
35        }
36
37
38        /* Channel is the first argument. We'll let the driver
39           check for valid channel numbers just to show how the
40           mio_error_string works
41   */
42        channel = atoi(argv[1]);
43
44        /* The same goes for the voltage argument. The driver will tell us
45           if the input is out of range
46   */
47
48        voltage = atof(argv[2]);
49
50        printf("Setting DAC channel %d to %9.5f Volts\n",channel,voltage);
51
52        set_dac_voltage(channel, voltage);
53
54
55        /* Here's where any problems with the input parameters will be determined.
56           by checking mio_error_code for a non-zero value we can detect error
57           conditions.
58   */
59
60        if(mio_error_code)
61        {
62                /* We'll print out the error and exit */
63
64                printf("%s\n",mio_error_string);
65                exit(1);
66        }
67
68}
69
70
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